WO2007037260A1 - 繊維強化熱可塑性樹脂組成物、その製造方法、及び熱可塑性樹脂用炭素繊維 - Google Patents
繊維強化熱可塑性樹脂組成物、その製造方法、及び熱可塑性樹脂用炭素繊維 Download PDFInfo
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- WO2007037260A1 WO2007037260A1 PCT/JP2006/319148 JP2006319148W WO2007037260A1 WO 2007037260 A1 WO2007037260 A1 WO 2007037260A1 JP 2006319148 W JP2006319148 W JP 2006319148W WO 2007037260 A1 WO2007037260 A1 WO 2007037260A1
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Classifications
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- C08L23/10—Homopolymers or copolymers of propene
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
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- C08L33/04—Homopolymers or copolymers of esters
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2918—Rod, strand, filament or fiber including free carbon or carbide or therewith [not as steel]
Definitions
- Fiber-reinforced thermoplastic resin composition Fiber-reinforced thermoplastic resin composition, method for producing the same, and carbon fiber for thermoplastic resin
- the present invention relates to a fiber-reinforced thermoplastic resin composition, a method for producing the same, and carbon fiber for thermoplastic resin.
- the molded article using the fiber reinforced thermoplastic resin composition of the present invention has excellent interfacial adhesiveness between the reinforced fiber and the thermoplastic resin, and thus has excellent strength characteristics and impact characteristics, and is electrically It is suitably used for equipment, office automation equipment, household electrical appliances or automobile parts, internal members and housings.
- a composition comprising a reinforcing fiber and a thermoplastic resin is lightweight and has excellent mechanical properties, and is therefore widely used in automotive applications, electronic devices, and electronic device applications.
- Reinforcing fibers used in these fiber-reinforced thermoplastic rosin compositions reinforce molded products in various forms depending on the intended use.
- These reinforcing fibers include metal fibers such as aluminum fibers and stainless fibers, organic fibers such as aramid fibers and PBO fibers, inorganic fibers such as silicon carbide fibers, and carbon fibers. Strength from the viewpoint of rigidity
- Carbon fibers are suitable for the purpose of increasing lightness, and among them, polyacrylonitrile-based carbon fibers are preferably used.
- thermoplastic resin composition containing fibers increases, so that not only the processability is impaired, but also the appearance of the molded product is deteriorated, and further, an unfilled portion of the thermoplastic resin is generated, causing a decrease in strength. There are many cases.
- interfacial adhesion is mainly used for interfacial adhesion of thermoplastic resin. In some cases, sufficient interfacial adhesion could not be obtained. Therefore, there is a method for improving the interfacial adhesion by chemical bonding with the functional group of the thermoplastic resin by applying an oxidation treatment to the carbon fiber to give a functional group such as a carboxyl group, a hydroxyl machine, or a carbonyl group to the surface. .
- an oxidation treatment to the carbon fiber to give a functional group such as a carboxyl group, a hydroxyl machine, or a carbonyl group to the surface.
- the amount of oxidation treatment is increased, the graphite structure on the surface of the carbon fiber is destroyed, and the strength of the carbon fiber itself is lowered, which may adversely affect the mechanical properties of the molded product.
- a sizing agent is generally applied to the carbon fiber bundle for the purpose of improving the bundle convergence.
- sizing agents include urethane resin (see Patent Document 1), polyamide resin (see Patent Document 2), polypropylene resin modified with unsaturated dicarboxylic acids (see Patent Document 3), (meth) acrylic acid ester A polymer having a monomer unit (see Patent Document 4) has been proposed.
- the amount of functional groups that can react with the sizing agent may not be sufficient due to limitations on the amount of acid treatment.
- the reactivity with the functional group on the surface of the carbon fiber may be poor.
- a highly hydrophilic compound having a high bond such as an urethane bond or an amide bond
- the molded article may be in a water-absorbing state and the mechanical properties may be deteriorated.
- Patent Documents 5 and 6 disclose a compound having a plurality of amino groups.
- Patent Document 6 discloses a compound having a plurality of amino groups in a carbon fiber reinforced resin composed of carbon fiber and acid-modified polyolefin resin. However, since these compounds having a plurality of amino groups are all low molecular weight compounds having a molecular weight of less than 1,000, the interface is fragile or the fiber-reinforced thermoplastic resin composition is used.
- Patent Document 1 JP-A-58-126375 (Claims)
- Patent Document 2 JP-A 53-106752 (Claims)
- Patent Document 3 JP-A-6-107442 (Claims)
- Patent Document 4 Japanese Patent Laid-Open No. 2005-146431 (Claims)
- Patent Document 5 Japanese Patent Laid-Open No. 4-228677 (Claims)
- Patent Document 6 Japanese Unexamined Patent Publication No. 2005-213478 (Claims)
- the present invention uses a polymer having excellent chemical reactivity with both the reinforcing fiber and the thermoplastic resin to increase the interfacial adhesion, and as a result.
- An object of the present invention is to provide a fiber-reinforced thermoplastic resin composition capable of sufficiently improving the mechanical properties of a molded product, a method for producing the same, and a carbon fiber for thermoplastic resin. Means to solve
- the present inventors added a (meth) acrylic polymer having an aminoalkylene group in the side chain or a polymer having an oxazoline group in the side chain as a third component to the reinforcing fiber and thermoplastic resin. As a result, it was found that the mechanical properties of the molded article were improved specifically and the above object could be achieved, and the present invention was conceived.
- the fiber-reinforced thermoplastic resin composition of the present invention has a (meth) acrylic polymer having an aminoalkylene group in the side chain (A1) 0.1 to 10% by weight, reinforcing fiber (B) l ⁇ 70 weight
- thermoplastic resin (C) 20 to 98.9% by weight, a fiber-reinforced thermoplastic resin composition.
- the fiber-reinforced thermoplastic resin composition of the present invention comprises a polymer (A2) having an oxazoline group in the side chain of 0.1 to 10% by weight, a reinforcing fiber (B) of 1 to 70% by weight, and Thermoplastic resin (C) A fiber-reinforced thermoplastic resin composition comprising 20 to 98.9% by weight.
- the fiber-reinforced thermoplastic resin composition further includes a group further comprising a carboxyl group, an acid anhydride group, and an epoxy group. 0 to 10% by weight of the polymer (D) containing at least one functional group whose force is also selected It can be included.
- the first method for producing the fiber-reinforced thermoplastic resin composition of the present invention includes at least a fiber-reinforced thermoplastic resin composition comprising the following la step, step 2a and step 3a. This is a manufacturing method.
- Step la Reinforcing fiber (B) 1-70% by weight of (meth) acrylic polymer (A1) having an aminoalkylene group in the side chain or polymer (A2) having an oxazoline group in the side chain 0 . 1-10% by weight applying step
- Step 3a The reinforcing fiber obtained in step la is mixed with the thermoplastic resin melted in step 2a and combined with 20 to 98.9% by weight of thermoplastic resin (C).
- the second method for producing the fiber-reinforced thermoplastic resin composition of the present invention includes at least the following fiber-reinforced thermoplastic resin consisting of the first lb step, the second b step, and the third b step. It is a manufacturing method of a composition.
- Step lb Process for processing the reinforcing fiber (B) into a sheet-like fabric such as knitted fabric, woven fabric, web, non-woven fabric, felt or mat
- Step 3b Thermoplastic is applied to the fabric provided with (meth) acrylic polymer (A1) having aminoalkylene group in the side chain or polymer (A2) having oxazoline group in the side chain in Step 2b.
- the (meth) acrylic group having an aminoalkylene group in the side chain in the above-mentioned Step 2a and Step 2b After the addition of the polymer (A1) or the polymer (A2) having an oxazoline group in the side chain, it further includes a carboxyl group, an acid anhydride group, and an epoxy group, and includes at least one selected functional group Application of polymer (D) is included.
- the present inventors have found that the elemental composition ratio (nitrogen atom NZ carbon atom C) measured by X-ray photoelectron spectroscopy is 0.001 or more, at a temperature of 25 ° C, and a humidity of 65%. Saturated water absorption When a (meth) acrylic polymer with a strength of S8% by weight or less is adhered to carbon fiber and composited with a thermoplastic resin, the mechanical properties of the resulting molded product are specifically improved. The inventors have found that the above object can be achieved, and have arrived at the present invention.
- the carbon fiber for thermoplastic resin of the present invention is a carbon fiber to which a (meth) acrylic polymer (A3) is adhered, and the (meth) acrylic polymer (A3)
- the (meth) acrylic polymer (A3) For thermoplastic resin with an elemental composition ratio (NZC) measured by X-ray photoelectron spectroscopy of 0.001 or more and a saturated water absorption of 8% by weight or less at a temperature of 25 ° C and a humidity of 65% Carbon fiber
- the present inventors attached an oxazoline group-containing polymer having an elemental composition ratio (nitrogen atom NZ carbon atom C) measured by X-ray photoelectron spectroscopy of 0.001 or more to carbon fiber. Then, when it was combined with a thermoplastic resin, it was found that the mechanical properties of the obtained molded product were specially improved to achieve the above object, and the present invention was conceived.
- the carbon fiber for thermoplastic resin of the present invention is a carbon fiber to which an oxazoline group-containing polymer (A4) is attached, and is measured by X-ray photoelectron spectroscopy of the polymer (C).
- the carbon fiber for thermoplastic resin having an elemental composition ratio (NZC) of not less than 0.001.
- a fiber-reinforced thermoplastic resin composition having excellent mechanical properties such as strength properties and impact properties can be obtained because good interfacial adhesion between the reinforcing fibers and the thermoplastic resin can be expressed. You can get things. Molded articles using this fiber-reinforced thermoplastic resin composition are suitably used for electrical and electronic equipment, OA equipment, home appliances or automobile parts, internal members, and casings.
- the fiber-reinforced thermoplastic resin composition of the present invention has a (meth) acrylic polymer having an aminoalkylene group in the side chain (A1) 0.1-: L0% by weight, reinforcing fiber (B) l It consists of ⁇ 70% by weight and thermoplastic resin (C) 20-98.9% by weight.
- the fiber-reinforced thermoplastic resin composition of the present invention comprises a polymer having an oxazoline group in the side chain (A2) 0.1: LO weight%, reinforcing fiber (B) 1-70 weight% and Thermoplastic rosin (C) is 20 to 98.9% by weight.
- the (meth) acrylic polymer (A1) used in the present invention has an aminoalkylene group that is constrained on the main chain skeleton from the viewpoint of chemical reactivity with the reinforcing fiber (B) and the thermoplastic resin (C).
- the amino group can react efficiently with the functional group of the reinforcing fiber because it can move relatively freely without being affected. Further, by using this aminoalkylene group in the side chain, a plurality of amino groups can be provided, and the functional group of the reinforcing fiber can be efficiently reacted.
- the proportion of the (meth) acrylic polymer (A1) is from 0.1 to 10% by weight, more preferably from 0.1 to 8% by weight, based on the fiber-reinforced thermoplastic resin composition. More preferably, it is 0.1 to 5% by weight. If the proportion of the (meth) acrylic polymer (A1) is less than 0.1% by weight, the reinforcing fiber may not be sufficiently distributed and the interfacial adhesion may be insufficient. On the other hand, if it exceeds 10% by weight, the effect on the molded product will increase, conversely, the mechanical properties may deteriorate.
- the (meth) acrylic polymer of the (meth) acrylic polymer (A1) includes both an talyl polymer and a methacrylic polymer.
- the (meth) acrylic polymer (A1) having an aminoalkylene group in the side chain used in the present invention is preferably unevenly distributed around the reinforcing fiber (B). It is more preferable that a part of the union (A1) is in contact with the reinforcing fiber (B) from the viewpoint of efficient chemical bonding between the two.
- Reinforcing fiber (B) A method for confirming the surrounding acrylic polymer (A1) is, for example, by cutting out a cross section of a molded product and using a halogen-based reagent having a functional group capable of reacting with an amino group on the surface. This can be confirmed by analyzing the halogen element with EPMA (Electron Probe X-ray Microanalyzer) after the reaction by chemical modification method and examining its concentration distribution. Further, it can be carried out by staining a molded product with a heavy metal compound, cutting out an ultrathin section with an ultramicrotome or the like, and observing the section with a transmission electron microscope.
- EPMA Electro Probe X-ray Microanalyzer
- the aminoalkylene group of the (meth) acrylic polymer (A1) used in the present invention is terminally terminated from the viewpoint of reactivity with the reinforcing fiber (B) or the thermoplastic resin (C).
- First-class amine structure Preferably there is. This is because, in particular, when carbon fiber is used as the reinforcing fiber, it has a carboxyl group on its surface.
- aminoalkylene group examples include an aminomethylene group, an aminoethylene group, an aminopropylene group, and an aminobutylene group.
- aminoalkylene group examples include an aminomethylene group, an aminoethylene group, an aminopropylene group, and an aminobutylene group.
- the (meth) acrylic polymer (A1) used in the present invention has a structure containing from 5 to LOOmol% of a unit represented by the following structural formula (1) in the polymer. preferable.
- R represents H or C H (m represents an integer of 1 or more), and R represents carbon.
- n a rational or irrational number of 0.01 to 10.
- a more preferable range of n is 0.05 to 5, more preferably 0.08 to 1.
- the (meth) acrylic polymer (A1) having the unit represented by the structural formula (1) includes, for example, 5 to 100 mol% of an unsaturated monomer such as acrylic acid and methacrylic acid, and an acrylic ester. After polymerizing 0 to 95 mol% of the unsaturated monomer as the main component in a suitable organic solvent, ethylene imine or propyleneimine is used for the carboxyl group present in the molecule of the polymer produced. It can manufacture by making the alkyleneimine which has C1-C5 alkylene groups, such as, react. The reason why n is not limited to an integer is that it is represented by an average value because it has a distribution in the number of bonds by reaction.
- acrylate ester those having an alkyl substituent in the range of 1 to 8 carbon atoms can be widely used. Specifically, methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, Isobutyl acrylate, t-butyl acrylate, hexyl lactate Examples thereof include relate, octyl acrylate, 2-ethylhexyl acrylate, and the like. These can be used alone or in combination.
- the (meth) acrylic polymer (A1) used in the present invention preferably has an amine hydrogen equivalent of 100 to 1, OOOgZeq from the viewpoint of interfacial adhesion to the reinforcing fiber (B).
- a more preferable range of the amine hydrogen equivalent is 200 to 800 gZeq, and more preferably 300 to 800 gZeq.
- the amine hydrogen equivalent is in the range of 100 to 1, OOOg / eq, sufficient interfacial adhesion with carbon fiber can be obtained.
- Amine hydrogen equivalent (gZeq) (S X N X S X 4000) / (F X VXW)
- PVSK solution is a polyvinyl calcium sulfate solution (for colloidal titration, manufactured by Wako Pure Chemical Industries, Ltd.).
- the (meth) acrylic polymer (A1) used in the present invention has a weight average molecular weight of 5,000 to 200,000.
- the weight average molecular weight is more preferably from 10,000 to 100,000, and even more preferably ⁇ 30,000 to 60,000. If the weight average molecular weight is 5,000 or more, the decomposition can be suppressed, the strength of the (meth) acrylic polymer (A1) itself can be improved, and the strength of the molded product can be sufficiently increased. When the weight average molecular weight is 200,000 or less, the handleability can be further improved.
- the weight average molecular weight of the (meth) acrylic polymer (A1) can be calculated by a standard polystyrene conversion method using gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- a GPC column filled with polystyrene cross-linked gel for example, shodex GPC K-804; manufactured by Showa Denshi Co., Ltd.
- black mouth form can be used as a GPC solvent.
- the polymer ( ⁇ 2) having an oxazoline group in the side chain used in the present invention is a reinforcing fiber ( ⁇ ) Further, it can chemically react with both the thermoplastic resin (c) and the interfacial adhesiveness, and a molded product having excellent mechanical properties can be obtained.
- the ratio of the polymer (A2) having an oxazoline group in the side chain is 0.1 to 10% by weight, more preferably 0.1 to the entire fiber-reinforced thermoplastic resin composition. -8% by weight, more preferably 0.1-5% by weight. If the proportion of the polymer (A2) having an oxazoline group in the side chain is less than 0.1% by weight, the reinforcing fiber may not be sufficiently distributed and the interfacial adhesion may be insufficient. On the other hand, if it exceeds 10% by weight, the effect on the molded product will increase, and the mechanical properties may decrease.
- the polymer (A2) having an oxazoline group in the side chain used in the present invention is unevenly distributed around the reinforcing fiber (B), and a part of the polymer (A2) The contact with the reinforcing fiber (B) is more preferable from the viewpoint of efficient chemical bonding between the two.
- Reinforcing fiber (B) The method for confirming the polymer (A2) having an oxazoline group around the side chain is, for example, cutting out a cross-section of a molded article and halogenating a functional group capable of reacting with the oxazoline group on the surface.
- the polymer (A2) having an oxazoline group in the side chain used in the present invention preferably has a structure containing 10 to: LOOmol% of a structural unit represented by the following general formula (2). Good.
- R represents hydrogen or a methyl group
- R represents a linear or branched structure having 0 to 5 carbon atoms.
- R-R represents hydrogen or an alkyl group having 1 to 20 carbon atoms
- the polymer (A2) having an oxazoline group in the side chain used in the present invention has a large number of oxazoline groups in the side chain as shown in the formula (2). Enough.
- a polymer (A2) having an oxazoline group having a unit represented by the general formula (2) in the side chain is a vinyl monomer having an oxazoline group 10 to: L00 mol% and other single monomers.
- the monomer (a) of 0 to 90 mol% can be produced by a conventionally known polymerization method.
- addition-polymerizable oxazoline examples include, for example, 2 blue 2-oxazoline, 2 vinyl-4-methyl-2-oxazoline, 2 vinyl-5-methyl-2-oxazoline, 2 isopropenyl 2-oxazoline, 2 isopropenyl.
- Nyl-4-methyl-2-oxazoline and 2-isopropenyl-5-ethyl-2-oxazoline can be mentioned, and one or a mixture of two or more selected for their group power can be used.
- Examples of the monomer (a) in the polymer (A2) having an oxazoline group in the side chain include, for example, methyl (meth) acrylate, butyl (meth) acrylate, (meth) acrylic acid 2 —Ethylhexyl, (meth) acrylic acid esters such as methoxypolyethylene glycol (meth) acrylate; sodium (meth) acrylate, potassium (meth) acrylate, ammonium (meth) acrylate, etc.
- (Meth) acrylic acid salts Unsaturated-tolyls such as (meth) acrylonitrile; Unsaturated amides such as (meth) acrylamide and N-methylol (meth) acrylamide; Bull esters such as acetic acid and propionic acid Butyl ethers such as methyl butyl ether and ethyl vinyl ether; a-olefins such as ethylene and propylene; butyl chloride and vinyl chloride Halogen-containing ⁇ , j8 unsaturated monomers such as redene and fluorinated bile; a, ⁇ -unsaturated aromatic monomers such as styrene and a-methylstyrene are preferred, and one or more of these may be used. Mixtures can be used.
- the polymer ( ⁇ ⁇ ⁇ 2) having an oxazoline group in the side chain used in the present invention has an oxazoline equivalent of 200 to 2, OOOgZeq from the viewpoint of interfacial adhesion to the reinforcing fiber ( ⁇ ).
- oxazoline equivalents 200-1,500 gZeq, More preferably, it is 200 to 1,200 g / eq.
- sufficient interfacial adhesion with carbon fibers can be obtained if the equivalent strength of xazodine is in the range of 200-2, OOOg / eq.
- oxazoline equivalent refers to the molecular weight of the copolymer per molecule of the oxazoline ring.
- the method for measuring the oxazoline equivalent is that the polymer solution containing oxazoline is lyophilized and analyzed by NMR, and the oxazoline is calculated from the absorption peak intensity derived from the oxazoline group and the absorption peak intensity derived from other monomers. Equivalent weight can be calculated.
- the oxazoline group-containing polymer (A2) used in the present invention preferably has a weight average molecular weight of 5,000 to 200,000! /.
- the weight average molecular weight is more preferably from 10,000 to: L00,000, and even more preferred is from 10,000 to 60,000.
- the weight average molecular weight is 5,000 or more, decomposition is suppressed, and the strength of the polymer (A2) itself having an oxazoline group in the side chain is improved, and the strength of the molded product can be sufficiently increased. If the weight average molecular weight is 200,000 or less, the handleability can be further improved.
- the weight average molecular weight of the oxazoline group-containing polymer (A2) can be calculated by a standard polystyrene conversion method using gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- a GPC column packed with polystyrene cross-linked gel for example, shodex GPC K-804; manufactured by Showa Denko KK was used, and black mouth form was used as a GPC solvent.
- the proportion of the reinforcing fiber ( ⁇ ) used in the present invention is 1 to 70% by weight, more preferably 5 to 50% by weight, and further preferably 10 to the fiber reinforced thermoplastic resin composition. ⁇ 40% by weight. If the proportion of reinforcing fibers ( ⁇ ) is less than 1% by weight, the reinforcing effect of the reinforcing fibers becomes insufficient, and sufficient mechanical properties of the molded product may not be obtained. If the proportion of reinforcing fibers ( ⁇ ) exceeds 70% by weight, the thermoplastic fibers may not be sufficiently impregnated between the reinforcing fibers, and as a result, sufficient mechanical properties may not be obtained.
- the reinforcing fiber ( ⁇ ⁇ ) used in the present invention includes, for example, metallic fibers such as aluminum, brass and stainless steel, polyacrylonitrile-based, rayon-based, lignin-based and pitch-based carbon fibers and graphite fibers, Preferable organic fibers such as aramid, cocoon, polyphenylene sulfide, polyester, acrylic, nylon and polyethylene, and inorganic fibers such as glass, basalt, silicon carbide and silicon nitride are preferable. Can be mentioned. One type of these reinforcing fibers may be used alone, or two or more types may be used in combination.
- carbon fibers and basalt fibers are preferably used from the viewpoint of specific strength and specific rigidity. Further, from the viewpoint of conductivity, carbon fiber is more preferably used.
- the weight average fiber length (lw) of the carbon fibers contained in the molded product is preferably 0.1 to LOmm, more preferably 0.2 to 5 mm. 0.1 ⁇ : If it is within the range of LOmm, sufficient mechanical properties of the molded product can be obtained.
- the weight average fiber length (lw)
- at least 400 carbon fiber filaments are arbitrarily extracted from the molded product, and the length is 1 ⁇ m to the optical microscope or scanning electron microscope. It can be calculated by measuring at.
- the molded product is heated at 500 ° C for 30 minutes, or only components other than carbon fiber are dissolved in a solvent and then filtered to remove carbon.
- a technique for separating fibers can be applied.
- Carbon fiber has a surface oxygen concentration OZC, which is the ratio of the number of atoms of oxygen (O) and carbon (C) on the fiber surface measured by X-ray photoelectron spectroscopy, from 0.05 to 0.5. Is preferred, more preferably 0.06-0.3, still more preferably 0.07-0.2.
- OZC surface oxygen concentration
- the surface oxygen concentration OZC is 0.05 or more, the amount of polar functional groups on the surface of the carbon fiber can be secured, the affinity with the thermoplastic resin composition can be increased, and stronger adhesion can be obtained.
- the surface oxygen concentration OZC is 0.5 or less, a decrease in the strength of the carbon fiber itself due to surface oxidation can be reduced.
- the amount of the oxygen-containing functional group of the carbon fiber was determined by X-ray photoelectron spectroscopy according to the following procedure. First, the carbon fiber from which the sizing agent attached to the surface of the carbon fiber is removed with a solvent is cut into 20 mm, arranged on a copper sample support base, and then used as an X-ray source. And keep the sample chamber at 1 X 10 8 Torr.
- the kinetic energy value (KE) of the main peak of C is set to 1202 eV as a peak correction value due to charging during measurement.
- the oxygen-containing functional group amount is determined from the ratio of the O peak area to the C peak area.
- Means for controlling the surface oxygen concentration OZC to 0.05 to 0.5 is not particularly limited.
- methods such as electrolytic oxidation treatment, chemical oxidation treatment, and vapor phase oxidation treatment may be used. Among them, electrolytic oxidation treatment is particularly easy to handle and use.
- Examples of the electrolytic solution used for the electrolytic treatment include inorganic acids such as sulfuric acid, nitric acid, and hydrochloric acid, inorganic hydroxides such as sodium hydroxide, potassium hydroxide, and barium hydroxide, and ammonia.
- Inorganic salts such as sodium carbonate and sodium hydrogen carbonate, aqueous solutions of organic salts such as sodium acetate and sodium benzoate, and potassium, norlium or other metal salts, and ammonium or hydrazine
- organic compounds are preferably mentioned.
- sulfuric acid and nitric acid which are preferred as inorganic acids, are particularly preferably used as the electrolyte.
- the degree of electrolytic treatment can control the ozc on the carbon fiber surface by setting the amount of electricity flowing in the electrolytic treatment.
- the strand strength of the carbon fiber or graphite fiber used in the present invention is preferably 3 to 8 GPa, more preferably 4 to 7 GPa, and the strand elastic modulus is 200 to 50.
- Those of OGPa can be preferably used.
- the strand strength described above is obtained by impregnating bundled carbon fiber or graphitized fiber with a resin having the following composition and curing it at a temperature of 130 ° C for 35 minutes, and then in accordance with JIS R-7601 (1986). It can be determined according to the specified tensile test method.
- the strand elastic modulus can be obtained from the slope of the load-elongation curve by conducting a tensile test by the same method as the above-described strand strength measuring method.
- the reinforcing fiber (B) used in the present invention is at least selected from the group force consisting of urethane-based resin, acrylic-based resin, epoxy-based resin, polyamide-based resin and surfactant.
- One type of composition may be attached. In this way, by attaching the composition to the reinforcing fiber (B), it is possible to improve the convergence of the reinforcing fiber bundle and to suppress fuzzing particularly during handling.
- the composition When the composition is applied to the reinforcing fibers, the composition can be immersed in a solution dissolved in the solvent or a dispersion dispersed in the dispersion medium and then dried. (It is preferable to immerse in sizing solution in reinforcing fiber.)
- the adhesion amount of the composition to be adhered to the reinforcing fiber (B) is preferably 0.1 to 5% by weight, more preferably 0.5 to 3% by weight with respect to the reinforcing fiber (B). is there.
- the number of carbon fibers (B) used in the present invention is preferably 1,000 to 70,000, more preferably 12,000 to 48,000.
- the form of the reinforcing fiber (B) used in the present invention is not particularly limited.
- Sheet-like fabrics such as continuous fibers, woven fabrics, webs, nonwoven fabrics, felts and mats are preferably used.
- the reinforcing fiber (B) used in the present invention can be cut into a length of 1 to 60 mm and used. More preferably, it is 3-50 mm. By setting the thickness within the range of 1 to 60 mm, both the reinforcing effect and the fluidity during molding can be achieved.
- the form of the reinforcing fiber (B) used in the present invention is not particularly limited, but a fabric in sheet form such as knitted fabric, woven fabric, web, nonwoven fabric, felt and mat is preferably used. It is done.
- the ratio of the thermoplastic resin (C) used in the present invention is 20 to 98.9% by weight, more preferably 40 to 90% by weight, based on the whole fiber-reinforced resin composition. Preferably it is 50 to 80% by weight.
- the ratio of the thermoplastic resin (C) is less than 20% by weight, the impregnation of the thermoplastic resin between the reinforcing fibers becomes insufficient, and as a result, the mechanical properties of the molded product are lowered.
- thermoplastic resin (C) used in the present invention examples include polyethylene terephthalate.
- Polyesters such as polyethylene (PE), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN) and liquid crystal polyester, and polyolefins such as polyethylene (PE), polypropylene (PP) and polybutylene,
- polyoxymethylene (POM) polyamide
- PA polycarbonate
- PC polymethylene metatalylate
- PMMA polychlorinated butyl
- PVC polyphenylene sulfide
- PPE Polyphenylene ether
- PPE polyimide
- PAI polyamide imide
- PAI polyetherimide
- PEI polysulfone
- PSU polysulfone
- PES polyether snorephone
- PK Polyetherol ketone
- PEK Polyetherol ketone
- a polyolefin resin is used.
- a modified polyolefin resin containing at least one selected functional group consisting of a carboxyl group, an acid anhydride group, and an epoxy group is a side chain of an aminoamino group. From the viewpoint of reactivity with the oxazoline group of the polymer (A2) of the acrylic polymer (A1) having an oxazoline group in the side chain.
- modified polyolefin examples include (anhydrous) maleic acid modified polyethylene, (anhydrous) maleic acid modified ethylene propylene copolymer, (anhydrous) maleic acid modified ethylene vinyl acetate copolymer, (anhydrous) maleic acid Modified polypropylene, (anhydrous) maleic acid-modified propylene ethylene copolymer, glycidyl (meth) acrylate-modified polyethylene, glycidyl (meth) acrylate-modified ethylene-propylene copolymer, glycidyl (meth) acrylate modified ethylene acetate Vinyl copolymer, 2-hydroxyethyl (meth) acrylate modification And polyethylene, 2-hydroxyethyl (meth) acrylate-modified ethylene propylene copolymer, 2-hydroxyethyl (meth) acrylate-modified ethylene vinyl acetate copolymer, and the like.
- ethylene (meth) acrylic acid copolymer ethylene 2-hydroxyethyl (meth) acrylate copolymer, ethylene-glycidyl (meth) acrylate copolymer, ethylene monopolyethylene glycol mono ( (Meth) Atalylate copolymer, ethylene acetate butyl (meth) acrylic acid copolymer, ethylene ethyl (meth) acrylate (maleic) maleic acid copolymer, ethylene-butyl acetate (anhydrous) maleic acid copolymer Polymer, ethylene vinyl acetate 2-hydroxyethyl (meth) acrylate copolymer, ethylene acetate glycidyl acetate (meth) acrylate copolymer, ethylene acetate butyl polyethylene glycol mono (meth) acrylate copolymer, and ethylene Examples thereof include a partially saponified product of a vinyl acetate copolymer.
- modified products such as (anhydrous) maleic acid-modified polypropylene, (anhydrous) maleic acid-modified ethylene propylene copolymer, and glycidyl (meth) acrylate-modified polypropylene are preferably used.
- a polymer (D) containing 0 to 10% by weight of at least one functional group selected from the group force including a carboxyl group, an acid anhydride group and an epoxy group force is added. It can contain in a fiber reinforced thermoplastic resin composition.
- the ratio of the polymer (D) is more preferably 0.01 to 8% by weight, still more preferably 0.01 to 5% by weight.
- the above functional group easily reacts with the amino group in the (meth) acrylic polymer (A1), and has the effect of further enhancing the adhesion between the reinforcing fiber and the thermoplastic resin.
- the polymer (D) has a degree of modification represented by a deviation of acid value or epoxy value of 10 to 500 mgKOHZg. It is preferable.
- the degree of modification is more preferably 20 to 300 mg KOHZg, and still more preferably 30 to 200 mg KOHZg.
- the epoxy value is obtained by multiplying the reciprocal of the epoxy equivalent (weight of a sample containing one equivalent of an epoxy group) measured according to JIS K7236 (2001) by the molecular weight of potassium hydroxide (56). The mg was changed.
- the weight average molecular weight of the polymer (D) used in the present invention is preferably 5,000 to 100,000, more preferably 10,000 to 80,000, and still more preferably. 20, 000 to 60, 000. If the weight average molecular weight of the polymer (D) is 5,000 or more, the decomposition can be suppressed, the strength of the polymer (D) itself can be improved, and the strength of the molded product can be sufficiently increased. If the weight average molecular weight is 100,000 or less, the handleability can be further improved.
- the weight average molecular weight of the polymer (D) can be calculated by a standard polystyrene conversion method using gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- a GPC column filled with polystyrene bridge gel for example, shodex GPC K-804; manufactured by Showa Denko KK was used, and Kuroguchi Form was used as a GPC solvent.
- the polymer (D) used in the present invention a copolymer of polyolefin and a modifier, and a polyolefin polymer obtained by graft polymerization of polyolefin and a modifier are preferably used.
- the modifier include a monomer having a carboxyl group or an acid anhydride group (for example, (meth) acrylic acid, crotonic acid, maleic acid, maleic anhydride, fumaric acid, etc.), a glycidyl group or an epoxy group.
- Monomers such as glycidyl (meth) acrylate
- polymer (D) used in the present invention include (anhydrous) maleic acid modified polyethylene, (anhydrous) maleic acid modified ethylene propylene copolymer, (anhydrous) maleic acid modified ethylene acetic acid.
- the copolymers include ethylene (meth) acrylic acid copolymer, ethylene 2-hydroxyethyl (meth) acrylate copolymer, ethylene glycidyl (meth) acrylate copolymer, ethylene-polyethylene glycol mono (meta ) Atalylate copolymer, ethylene vinyl acetate- (meth) acrylic acid copolymer, ethylene ethyl (meth) acrylate (anhydrous) maleic acid copolymer, ethylene butyl acetate (anhydrous) maleic acid copolymer, ethylene acetic acid Bull 2-hydroxyethyl (meth) acrylate copolymer, ethylene butyl glycidyl acetate (meth) acrylate copolymer, ethylene acetate butyl polyethylene glycol mono (meth) acrylate copolymer, and ethylene acetate Examples thereof include a partially saponified vinyl copolymer.
- modified products such as (anhydrous) maleic acid-modified polypropylene, (anhydrous) maleic acid-modified ethylene propylene copolymer, and glycidyl (meth) acrylate-modified polypropylene are preferably used.
- the polymer (D) used in the present invention preferably has at least one kind of property, with water-soluble, suspending or emulsifying power selected.
- Examples of the solvent that dissolves the polymer (D) include water, methanol, ethanol, dimethylformamide, dimethylacetamide, and acetone.
- water is preferable from the viewpoint of easy handling and disaster prevention. Better ,.
- the fiber-reinforced thermoplastic resin composition of the present invention may contain other components other than the above, depending on the application, etc. within a range not impairing the mechanical properties. Etc. may be included.
- fillers or additives include inorganic fillers, flame retardants, conductivity imparting agents, crystal nucleating agents, ultraviolet absorbers, antioxidants, vibration damping agents, antibacterial agents, insect repellents, deodorants, coloring inhibitors, heat There are stabilizers, mold release agents, antistatic agents, plasticizers, lubricants, colorants, pigments, foaming agents and coupling agents.
- flame retardants include flame retardants such as halogen compounds, antimony compounds, phosphorus compounds, nitrogen compounds, silicone compounds, fluorine compounds, phenol compounds, and metal hydroxide compounds. can do.
- flame retardants such as halogen compounds, antimony compounds, phosphorus compounds, nitrogen compounds, silicone compounds, fluorine compounds, phenol compounds, and metal hydroxide compounds.
- phosphorus compounds such as ammonium polyphosphate, polyphosphazene, phosphate, phosphonate, phosphinate, phosphinoxide, and red phosphorus can be preferably used.
- the conductivity-imparting agent for example, carbon black, amorphous carbon powder, natural graphite powder, artificial graphite powder, expanded graphite powder, pitch microbeads, vapor-grown carbon fiber, carbon nanotube, and the like may be employed. it can.
- the first production method of the fiber-reinforced thermoplastic resin composition of the present invention includes at least the following la step, 2a step and 3a step.
- Step la Reinforcing fiber (B) 1-70% by weight of (meth) acrylic polymer (A1) having an aminoalkylene group in the side chain or polymer (A2) having an oxazoline group in the side chain 0.1 to: Step of applying LO weight%
- Step 3a The reinforcing fiber obtained in step la is mixed with the thermoplastic resin melted in step 2a and combined with 20 to 98.9% by weight of thermoplastic resin (C).
- the second production method of the fiber-reinforced thermoplastic resin composition of the present invention includes at least the following lb step, 2b step and 3b step.
- Step lb Process for covering the reinforcing fiber (B) into a sheet-like fabric such as knitted fabric, woven fabric, web, non-woven fabric, felt or mat.
- Step 2b The weight of 1 to 70% by weight of the dough obtained in Step lb is added to the weight of the (meth) acrylic polymer (A1) having an aminoalkylene group in the side chain or the oxazoline group in the side chain. Step of applying coalescence (A2) from 0.1 to LO weight%
- Step 3b Thermoplastic is applied to the fabric provided with (meth) acrylic polymer (A1) having aminoalkylene group in the side chain or polymer (A2) having oxazoline group in the side chain in Step 2b.
- step lb a conventionally known method is used as a method of processing the reinforcing fiber (B) into a fabric such as a knitted fabric, a woven fabric, a web, a nonwoven fabric, a felt or a mat.
- thermoplastic resin (C) for example 0 to 50% by weight, may be preliminarily mixed with the reinforcing fiber (B). More preferably, it is 5 to 40% by weight.
- thermoplastic resin (C) used in the present invention is preferably in the form of particles, film or nonwoven fabric.
- a method in which the solvent is evaporated after adhering to the reinforcing fiber (B) in the form of an aqueous solution or an aqueous dispersion is preferably used.
- a conventionally known method such as a spray method or a date method is used.
- the (meth) acrylic polymer (A1) having an aminoalkylene group in the side chain or the polymer having an oxazoline group in the side chain (A2 ) may be further added.
- a method for imparting the polymer (D) a method in which the solvent is evaporated after being attached to the reinforcing fiber (B) in the form of an aqueous solution or an aqueous dispersion is preferably used.
- steps 2a and 2b the provision of (meth) acrylic polymer (A1) having an aminoalkylene group in the side chain or polymer (A2) having an oxazoline group in the side chain Thereafter, after the application of the polymer (D), it may be dried with hot air at a temperature of 100 to 200 ° C. for 0.1 to 90 minutes, if necessary.
- thermoplastic resin (C) As a specific example of the method for applying the thermoplastic resin (C) by heating and melting in the step 3b, the film obtained in the step 2b is applied to a film or non-woven fabric. After sandwiching the thermoplastic resin (C), heat double pressure impregnation using a double belt press or flat plate press, and the dough obtained in step 2b was impregnated with particulate thermoplastic resin. Later, a method of impregnating with heat and pressure using a double belt press or flat plate press is shown as an example It can be done.
- Examples of the form of the fiber-reinforced thermoplastic resin composition obtained through the step 3b (compositing step) include stampable sheets and pre-preders. Furthermore, by applying force, these can be formed into pellets or flakes, and can be used for general injection molding.
- the carbon fiber for thermoplastic resin of the present invention is a carbon fiber obtained by attaching a (meth) acrylic polymer (A3) to a carbon fiber, and the (meth) acrylic polymer (A3) is ,
- An elemental composition ratio (nitrogen atom NZ carbon atom C) measured by X-ray photoelectron spectroscopy is 0.001 or more, and a saturated water absorption at a temperature of 25 ° C and a humidity of 65% is 8% by weight or less. It is a coalescence.
- the carbon fiber for thermoplastic resin of the present invention is a carbon fiber in which an oxazoline group-containing polymer (A4) is attached to a carbon fiber, and the oxazoline group-containing polymer (A4) is X
- the elemental composition ratio (nitrogen atom NZ carbon atom C) measured by linear photoelectron spectroscopy is 0.001 or more.
- the (meth) acrylic polymer (A3) constituting the carbon fiber for thermoplastic resin of the present invention must have a nitrogen atom having a high polarity of 0.001 or more in comparison with the carbon atom.
- a preferable range of the elemental composition ratio (NZC) is 0.005 or more and 0.6 or less, and more preferably 0.01 or more and 0.6 or less. If the elemental composition ratio (NZC) is less than 0.001, the affinity with the functional group on the surface of the carbon fiber may decrease, and the mechanical properties of the molded product may decrease.
- the surface functional group of carbon fiber is generally subjected to surface acid treatment on the surface of carbon fiber in order to improve wettability with a thermoplastic resin which is a matrix resin. It represents the functional group that is formed. Specific examples include a hydroxyl group, a carboxyl group, and a carbonyl group. Specific examples of the nitrogen atom of the (meth) acrylic polymer (A3) used in the present invention preferably included in a part of the reactive functional group include, for example, ammine, imine, and enamine. , Cisazoline, nitrile and -tro compounds.
- the (meth) acrylic polymer (A3) used in the present invention can be easily coated on the carbon fiber surface. Thereby, it is possible to prevent the (meth) acrylic polymer (A3) force matrix from being diffused into the thermoplastic resin which is a matrix resin during molding.
- the (meth) acrylic polymer (A3) of the (meth) acrylic polymer (A3) includes both an acrylic polymer and a methacrylic polymer.
- the (meth) acrylic polymer (A3) constituting the carbon fiber for thermoplastic resin of the present invention has a saturated water absorption of 8% by weight or less at a temperature of 25 ° C and a humidity of 65%. Is mandatory.
- the saturated water absorption is preferably 0% by weight to 6% by weight, and more preferably 0% by weight to 4% by weight. When the saturated water absorption is 8% by weight or less, sufficient mechanical properties of the molded product can be obtained.
- aminoalkylene group in the side chain. Since the aminoalkylene group can move relatively freely without being affected by the constraint of the main chain skeleton, the amino group can be efficiently reacted with the functional group of the reinforcing fiber. Moreover, by using this aminoalkylene group in the side chain, a plurality of amino groups can be provided, and it is possible to efficiently react with the functional group of the reinforcing fiber.
- the terminal of the aminoalkylene group has a primary amine structure. This is because the carbon fiber surface has a carboxyl group.
- aminoalkylene group examples include an aminomethylene group, an aminoethylene group, an aminopropylene group, and an aminobutylene group.
- aminoalkylene group examples include an aminomethylene group, an aminoethylene group, an aminopropylene group, and an aminobutylene group.
- the (meth) acrylic polymer (A3) used in the present invention has a structure containing 5 to: LOOmol% of a unit represented by the following structural formula (3) in the polymer. preferable.
- R represents H or C H (m represents an integer of 1 or more), and R represents carbon.
- n a rational or irrational number of 0.01 to 10.
- a more preferable range of n is 0.05 to 5, more preferably 0.08 to 1.
- the (meth) acrylic polymer (A3) having the unit represented by the structural formula (3) includes, for example, 5 to 100 mol% of an unsaturated monomer such as acrylic acid and methacrylic acid, and an acrylate ester. After polymerizing 0 to 95 mol% of the unsaturated monomer as the main component in a suitable organic solvent, ethylene imine or propyleneimine is used for the carboxyl group present in the molecule of the polymer produced. It can manufacture by making the alkyleneimine which has C1-C5 alkylene groups, such as, react. The reason why n is not limited to an integer is that it is represented by an average value because it has a distribution in the number of bonds by reaction.
- acrylate ester those having an alkyl substituent in the range of 1 to 8 carbon atoms can be widely used. Specifically, methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, Examples thereof include isobutyl acrylate, t-butyl acrylate, hexyl acrylate, octyl acrylate, 2-ethyl hexyl acrylate. These may be used alone or in combination.
- the (meth) acrylic polymer (A3) used in the present invention preferably has an amine amine equivalent of 100 to 1, OOOgZeq from the viewpoint of interfacial adhesion to carbon fibers.
- a more preferred range of amine hydrogen equivalents is ⁇ 200 to 800 g / eq, more preferred is 300 to 80 OgZeq. If the amine hydrogen equivalent is within the range of 100-1 and OOOgZeq, Sufficient interfacial adhesion with carbon fibers is obtained.
- PVSK solution is a polyvinyl calcium sulfate solution (for colloidal titration, manufactured by Wako Pure Chemical Industries, Ltd.).
- the (meth) acrylic polymer (A3) used in the present invention has a weight average molecular weight of 5,000 to 200,000.
- the weight average molecular weight is more preferably from 10,000 to 100,000, and even more preferably ⁇ 30,000 to 60,000. If the weight average molecular weight is 5,000 or more, the decomposition can be suppressed, the strength of the (meth) acrylic polymer (A1) itself can be improved, and the strength of the molded product can be sufficiently increased. When the weight average molecular weight is 200,000 or less, the handleability can be further improved.
- the weight average molecular weight of the (meth) acrylic polymer (A3) can be calculated by a standard polystyrene conversion method using gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- a GPC column filled with polystyrene cross-linked gel for example, shodex GPC K-804; manufactured by Showa Denshi Co., Ltd.
- black mouth form can be used as a GPC solvent.
- the (meth) acrylic polymer (A3) attached amount used in the present invention is 0.1 to 20 parts by weight with respect to 100 parts by weight of carbon fiber from the viewpoint of coating on the surface of carbon fiber. It is preferable that The adhesion amount is more preferably 0.1 to: L0 parts by weight, and still more preferably 0.1 to 5 parts by weight. If the amount is less than 1 part by weight, the reinforcing fiber may not be sufficiently spread and the interfacial adhesion may be insufficient. On the other hand, if the amount exceeds 20 parts by weight, the effect on the molded product will increase, and the mechanical properties may decrease.
- the (meth) acrylic polymer (A3) used in the present invention has both a function of improving the adhesion between the carbon fiber and the thermoplastic resin and a function of improving the convergence of the carbon fiber bundle, and is sizing. It is given to the carbon fiber surface as one component of the agent.
- the (meth) acrylic polymer (A3) used in the present invention has any one characteristic selected from water-soluble, suspending or emulsifying power from the viewpoints of safety and environment. It is preferable to have That is, the (meth) acrylic polymer (A3) is water-soluble, suspendable or emulsifiable, so that they are imparted to carbon fibers in an aqueous system (aqueous solution or dispersion suspended or emulsified in water). This is because the process applied to the carbon fiber does not involve evaporation of the organic solvent, and there is no fear of ignition or environmental pollution.
- the oxazoline group-containing polymer (A4) constituting the carbon fiber for thermoplastic resin of the present invention contains an oxazoline group, and the elemental composition ratio (NZC) of nitrogen atom N and carbon atom C is 0.001. That is essential. Thereby, the affinity with the carbon fiber surface functional group described later is improved, and consequently the mechanical properties of the thermoplastic resin are improved.
- a preferable range of the elemental composition ratio (NZC) is 0.005 or more and 0.6 or less, and more preferably 0.01 or more and 0.6 or less. When the elemental composition ratio is less than 0.001, the affinity with the surface functional group of the carbon fiber may decrease, and as a result, the mechanical properties of the molded product may decrease.
- the oxazoline group-containing polymer (A4) constituting the carbon fiber for thermoplastic resin of the present invention has a temperature of 25 ° C and a humidity of 65 from the viewpoint of adhesion between the carbon fiber and the thermoplastic resin.
- the saturated water absorption at% is preferably 8% by weight or less.
- the saturated water absorption is more preferably 0 wt% or more and 6 wt% or less, and 0 wt% or more and 4 wt% or less. When the saturated water absorption force S is 8% by weight or less, sufficient mechanical properties of the molded product can be obtained.
- the oxazoline group-containing polymer (A4) used in the present invention has high chemical reactivity with the carbon fiber and the thermoplastic resin (C), and therefore has good interfacial adhesion and excellent mechanical properties. A molded product can be obtained.
- the oxazoline group-containing polymer (A4) used in the present invention preferably has a structure containing 10 to L00 mol% of structural units represented by the following general formula (4).
- R represents hydrogen or a methyl group, and R represents a linear or branched structure having 0 to 5 carbon atoms.
- R-R represents hydrogen or an alkyl group having 1 to 20 carbon atoms
- the oxazoline group-containing polymer (A4) used in the present invention has a large number of oxazoline groups in the side chain as shown by the formula (4), and thus sufficiently ensures a chemical reaction with the carbon fiber. it can.
- the oxazoline group-containing polymer (A4) having a unit represented by the above general formula (4) includes 10 to 100 mol% of a vinyl monomer containing an oxazoline group and other monomers (a ) 0-90 mol% can be produced by a conventionally known polymerization method.
- addition-polymerizable oxazoline include, for example, 2-burou-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-2-oxazoline , 2-isopropenyl-4-methyl-2-oxazoline and 2-isopropenyl-5-ethyl-2-oxazoline, and use one or a mixture of two or more selected for their group power. Can do.
- Examples of the monomer (a) in the oxazoline group-containing polymer (A4) include methyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, (Meth) acrylic acid esters such as (meth) acrylic acid methoxypolyethylene glycol; (meth) acrylic acid such as (meth) sodium acrylate, potassium (meth) acrylate, and (meth) acrylic acid ammonium Salts; Unsaturated-tolyls such as (meth) acrylonitrile; Unsaturated amides such as (meth) acrylamide, N-methylol (meth) acrylamide; Vinyl esters such as butyl acetate and propionate butyl; Methyl vinyl ether, Ethyl vinyl - bi such ether - ethers, ethylene, propylene, etc.
- the oxazoline group-containing polymer ( ⁇ 4) used in the present invention preferably has an oxazoline equivalent of 200 to 2, OOOg / eq from the viewpoint of interfacial adhesion to carbon fibers.
- a more preferable range of the oxazoline equivalent is 200 to 1,500 gZeq, and more preferably 200 to 1,200 g / eq.
- it is within the range of 200 to 2,000 g / eq equivalent strength of xazodine particularly sufficient interfacial adhesion with carbon fibers can be obtained.
- oxazoline equivalent refers to the molecular weight of the copolymer per molecule of the oxazoline ring.
- the method for measuring the oxazoline equivalent is that the polymer solution containing oxazoline is lyophilized and analyzed by NMR, and the oxazoline equivalent is calculated from the absorption peak intensity derived from the oxazoline group and the absorption peak intensity derived from other monomers. Can be calculated.
- the oxazoline group-containing polymer (A4) used in the present invention preferably has a weight average molecular weight of 5,000 to 200,000! /.
- the weight average molecular weight is more preferably from 10,000 to: L00,000, and even more preferred is from 10,000 to 60,000. If the weight average molecular weight is 5,000 or more, decomposition can be suppressed, the strength of the oxazoline group-containing polymer (A2) itself can be improved, and the strength of the molded product can be sufficiently increased. When the weight average molecular weight is 200,000 or less, the handleability can be further improved.
- the weight average molecular weight of the oxazoline group-containing polymer (A4) can be calculated by a standard polystyrene conversion method using gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- a GPC column packed with polystyrene cross-linked gel for example, shodex GPC K-804; manufactured by Showa Denko KK was used, and black mouth form was used as a GPC solvent.
- the amount of the oxazoline group-containing polymer ( ⁇ 4) used in the present invention is 0.1 to 20 parts by weight with respect to 100 parts by weight of the carbon fiber from the viewpoint of coating on the surface of the carbon fiber. It is preferable that it exists.
- the adhesion amount is more preferably 0.1 to: L0 parts by weight, and still more preferably 0.1 to 5 parts by weight.
- the oxazoline group-containing polymer ( ⁇ 4) used in the present invention has both a function of improving the interfacial adhesion between the carbon fiber and the thermoplastic resin and a function of improving the convergence of the carbon fiber bundle. It is given to the carbon fiber surface as one component of the Ising agent.
- the oxazoline group-containing polymer (A4) used in the present invention has any one property selected from water-soluble, suspendable and emulsifiable properties from the viewpoint of safety and environment. It is preferable to do this. That is, the oxazoline group-containing polymer (A4) is water-soluble, suspendable, or emulsifiable, so that they can be converted into carbon fibers in an aqueous system (aqueous solution or dispersion obtained by suspending or emulsifying in water). This is because the organic fiber is not evaporated in the process of applying to the carbon fiber, and there is no fear of ignition or environmental pollution.
- the element composition ratio (NZC) measured by the X-ray photoelectron spectroscopy is measured by the following method.
- N peak area 398
- the surface specific nitrogen concentration N / C is the N peak area
- c Represents the atomic ratio (nitrogen atom NZ carbon atom C) calculated by dividing the ratio of the 1S peak area by the sensitivity correction value unique to the device.
- ESCA-750 manufactured by Shimadzu Corporation was used, and the sensitivity correction value unique to the above apparatus was 1.7.
- the saturated water absorption is measured by the following method.
- the carbon fiber used in the present invention is a surface measured by X-ray photoelectron spectroscopy of the carbon fiber from the viewpoint of reactivity with the (meth) acrylic polymer (A3) or the oxazoline group-containing polymer (A4).
- the oxygen concentration (oxygen atom OZ carbon atom C) is in the range of 0.05 to 0.50
- the surface carboxyl group concentration (carboxyl group COOHZ carbon atom C) of the carbon fiber measured by chemical modification X-ray photoelectron spectroscopy is A range of 1 to 5% is preferable.
- the surface oxygen concentration (OZC) is more preferably in the range of 0.05 to 0.40, and even more preferably in the range of 0.05 to 0.30.
- a more preferable range of the surface carboxyl group concentration (COOHZC) is 1 to 4%, and a more preferable range is 1 to 3%.
- the surface oxygen concentration (OZC) and the surface carboxyl group concentration (COOHZC) are preferred, and by controlling them within the ranges, the (meth) acrylic polymer (A3) contains primary amino groups and oxazoline groups.
- the reaction efficiency of the polymer (A4) with the oxazoline group can be increased, the interfacial adhesion can be improved, and the mechanical properties of the thermoplastic resin composition can be further improved.
- the surface oxygen concentration (OZC) of the carbon fiber was determined by X-ray photoelectron spectroscopy according to the following procedure. First, carbon fibers from which carbon fiber surface deposits, etc. have been removed with a solvent are cut to a length of 20 mm, spread and arranged on a copper sample support, and then the sample is used as an X-ray source using ⁇ . keeping the middle chamber foremost 1 X 10- 8 Torr. Accompanying charging during measurement
- the surface oxygen concentration is the specific force of the above O peak area and C peak area.
- the surface carboxyl group concentration (COOHZC) of carbon fiber was determined by chemical modification X-ray photoelectron spectroscopy according to the following procedure.
- COOHZC surface carboxyl group concentration
- the 1S product [F] was determined by drawing a straight baseline in the range of 682 to 695 eV. Is is also
- the residual rate m of the dicyclohexyl carpositimide derivative was determined from IS 1S cake splitting catalyst.
- COOHZC surface carboxyl group concentration
- k is the sensitivity correction value of the F peak area with respect to the C peak area unique to the device.
- model SSX-100-206 manufactured by SSI of the United States was used, and the sensitivity correction value unique to the above device was 3.919.
- Means for controlling the surface oxygen concentration (OZC) and the surface carboxyl group concentration (COOHZC) of the carbon fiber within a predetermined range is not particularly limited.
- electrolytic oxidation treatment chemical solution oxidation It is possible to adopt methods such as treatment and gas phase oxidation treatment, and the electrolytic oxidation treatment is easy to handle!
- the electrolytic solution used for the electrolytic oxidation treatment includes inorganic acids such as sulfuric acid, nitric acid and hydrochloric acid, inorganic hydroxides such as sodium hydroxide, potassium hydroxide and barium hydroxide, ammonia, Inorganic salts such as sodium carbonate and sodium bicarbonate, aqueous solutions of organic salts such as sodium acetate and sodium benzoate, and potassium, barium or other metal salts, and ammonium salts, or And organic compounds such as hydrazine.
- sulfuric acid and nitric acid which are preferably inorganic acids, are particularly preferably used as the electrolyte.
- the degree of electrolytic treatment can control the surface oxygen concentration (OZC) and surface carboxyl group concentration (COOHZC) by setting the amount of electricity flowing in the electrolytic treatment. wear.
- the carbon fibers used in the present invention are preferably bundled, and the strand strength is preferably 3 to 8 GPa, more preferably 4 to 7 GPa.
- the resistivity is preferably 200 to 500 GPa.
- the strand strength described above is obtained by impregnating bundled carbon fiber or graphitized fiber with a resin having the following composition and curing it at a temperature of 130 ° C for 35 minutes, followed by JIS R-7601 (1986). It can be determined according to the specified tensile test method.
- the strand elastic modulus of the carbon fiber can be obtained from the slope of the load-elongation curve by performing a tensile test in the same manner as the strand strength measuring method.
- the carbon fiber used in the present invention preferably has a total fineness of 50 to 5, OOOtex.
- the total fineness is more preferably 500 to 3,500 tex. If the total fineness is less than 50 tex, the efficiency of the cutting work will be reduced and productivity may be reduced.
- the total fineness is 5, 0
- fluffing may occur when cutting and the bundle is not well focused.
- the carbon fiber used in the present invention has 1,000 to 70,000 filaments constituting a bundle.
- the number is preferably 12,000 to 48,000. If the number is less than 1,000, the efficiency of the cutting work will deteriorate and the productivity may decrease. Also, if the number exceeds 70,000, fluffing with poor bundle convergence may occur during cutting.
- the form of the carbon fiber used in the present invention is not particularly limited, but a sheet-like cloth such as continuous fiber, woven fabric, web, non-woven fabric, felt and mat is preferably used.
- the carbon fiber used in the present invention may be cut to a length of 1 to 60 mm. it can. More preferably, it is 3-50 mm. By setting the thickness within the range of 1 to 60 mm, both the reinforcing effect and the fluidity during molding can be achieved.
- a carboxyl group, an acid anhydride group and an epoxy group are used.
- Group force as basic force 0.01 to 20 parts by weight of the polymer (D) containing at least one selected functional group may be attached to 100 parts by weight of carbon fiber. More preferably, 0.1 to: LO parts by weight, still more preferably 0.1 to 5 parts by weight.
- the polymer (D) in addition to the (meth) acrylic polymer (A3) and the oxazoline group-containing polymer (A4), the polymer (D) further enhances the adhesion between the carbon fiber and the thermoplastic resin. It has a function to enhance and is preferably applied to the carbon fiber surface as a component of the sizing agent.
- the polymer (D) is a reaction efficiency of the (meth) acrylic polymer (A3) with the amino group and the oxazoline group of the oxazoline group-containing polymer (A4).
- the degree of modification represented by the difference in acid value or epoxy value is 10 to 500 mgKOHZg.
- the degree of modification is more preferably 20 to 300 mgKOHZg, and even more preferably 30 to 200 mgKOHZg.
- polymer (D) is the same as described above.
- the (meth) acrylic polymer (A3) or the oxazoline group-containing polymer (A4) and the polymer (D) in the present invention may have a weight ratio (D) / (A3) or (D) / (A4) is preferably in the range of 0 to: LOO.
- the weight ratio is more preferably in the range of 0 to 70, still more preferably in the range of 0 to 30.
- the sizing agent (E) is made of urethane resin, acrylic resin, epoxy resin, polyamide resin, polyester resin, and polyether resin. It is preferable to attach 0 to 20 parts by weight of at least one kind of rosin selected more than 100 parts by weight of carbon fiber.
- the sizing agent (E) has a function of further enhancing the sizing property of the carbon fiber bundle. And may be applied to the carbon fiber surface as a component of the sizing agent.
- the method of attaching the (meth) acrylic polymer (A3) or the oxazoline group-containing polymer (A4), the polymer (D), and the sizing agent (E) to the carbon fiber is particularly preferable.
- a method in which carbon fiber is immersed in a liquid adjusted in an aqueous or organic solvent system through a roller, or a roller on which carbon fiber is adjusted in an aqueous or organic solvent system is attached And a method of spraying a liquid prepared in an aqueous or organic solvent system in the form of a mist.
- a liquid prepared with a water-based or organic solvent system of (meth) acrylic polymer (A3), oxazoline group-containing polymer (A4), polymer (D), and sizing agent (E) is used as a carbon fiber.
- a method of imparting to either a batch type or a continuous type may be used, but a continuous type capable of improving productivity and reducing variation is preferable.
- the adhesion amount of each active ingredient of the (meth) acrylic polymer (A3), the oxazoline group-containing polymer (A4), the polymer (D) and the sizing agent (E) to the carbon fiber is within an appropriate range.
- the concentration and temperature of the liquid adjusted with an aqueous or organic solvent system, the yarn tension, and the like so as to adhere uniformly.
- the carbon fiber may be vibrated with ultrasonic waves.
- the aqueous system in the present invention refers to each component of the (meth) acrylic polymer (A3), the oxazoline group-containing polymer (A4), the polymer (D), and the sizing agent (E) in an aqueous solution. Alternatively, it indicates a state in which the dispersion is suspended or emulsified in water.
- the organic solvent system refers to the above components (meth) acrylic polymer (A3), oxazoline group-containing polymer (A4), polymer (D) and sizing agent (E), methanol, ethanol , Dimethylformamide, dimethylacetamide, toluene, tetrahydrofuran and acetone.
- Application by water system is preferably used because it does not cause evaporation of organic solvent in the process, and thus there is no risk of ignition or environmental pollution.
- the (meth) acrylic polymer (A3) or the oxazoline group-containing polymer (A4), the polymer (D) and the sizing agent (E) may be separately provided in a plurality of stages. They may be given at the same time.
- the temperature is 100 ⁇ 200 ° C, 0.1 ⁇ You may dry with hot air for 100 minutes. In the case of simultaneous application, it may be dried with hot air at a temperature of 100 to 200 ° C for 0.1 to L00 minutes after the application.
- thermoplastic resin as the matrix resin containing the thermoplastic resin carbon fiber of the present invention is the same as described above.
- an acrylic polymer (A3) is a modified polyolefin resin containing a carboxyl group, an acid anhydride group, and a group strength consisting of an epoxy group and at least one selected functional group. From the viewpoint of reactivity of the amino group and the oxazoline group-containing polymer (A4) with the oxazoline group.
- the filling amount of the carbon fiber for thermoplastic resin of the present invention in the thermoplastic resin composition is as follows:
- it is 1 to 70% by weight, more preferably 5 to 50% by weight, and still more preferably 10%.
- thermoplastic resin blended with the carbon fiber for thermoplastic resin of the present invention a filler, an additive, and the like may be included depending on the use and the like within a range not impairing the mechanical properties.
- fillers or additives are the same as those described above.
- the molding method for forming the carbon fiber for thermoplastic resin and the thermoplastic resin into a molded product is not particularly limited.
- press molding, injection molding, blow molding, rotational molding, extrusion molding, transfer molding, and filament winding Examples include molding.
- the fiber-reinforced thermoplastic resin composition of the present invention can be used as a molded product.
- Examples of the usage of the molded product include a laptop computer, a display, an OA device, a mobile phone, a portable information terminal, and a facsimile.
- Compact discs Portable MDs, portable radio cassettes, PDAs (personal digital assistants such as electronic notebooks), video cameras, digital still cameras, optical equipment, audio equipment, air conditioners, lighting equipment, entertainment equipment, toy supplies, and other home appliances
- Internal parts such as electrical and electronic equipment casings and tray chassis, cases and machines Construction materials, building materials such as panels, motor parts, alternator terminals, alternator connectors, ic regulators, light meter potentiometer bases, suspension parts, exhaust gas valves and other valves, fuel related, exhaust system and various intake pipes , Air intake nozzle snorkel, intake bear hold, various arms, various frames, various hinges, various bearings, fuel pump, gasoline tank, CNG tank, engine coolant joint, carburetor main body, carburetor spacer, exhaust gas Sensor, cooling water sensor, oil temperature sensor, brake pad wear sensor, throttle position sensor, crankshaft position sensor, air flow meter, brake butt wear sensor -Thermostat base for air conditioner, heating / air flow control valve, brush holder for radiator motor, water pump
- a bending strength test piece having a length of 130 ⁇ 1 mm and a width of 25 ⁇ 0.2 mm was cut out from the obtained injection molded product.
- ASTM D-790 (2004) using a three-point bending test jig (indenter 10 mm, fulcrum 10 mm), set the support span to 100 mm and increase the bending strength at a crosshead speed of 5.3 mmZ. It was measured.
- an unnotched Izod impact test and an unnotched Izod impact test were performed.
- the thickness of the test piece used was 3.2 mm, and the test piece was tested at a moisture content of 0.1% or less, an ambient temperature of 23 ° C, and a humidity of 50%.
- a bending strength test piece having a length of 100 ⁇ lmm and a width of 10 ⁇ 0.2mm was cut out from the press-formed product.
- the support span was set to 75 mm using a three-point bending test jig (indenter 10 mm, fulcrum 10 mm), and the bending strength was measured at a crosshead speed of 2 mmZ.
- an unnotched Izod impact test and an unnotched Izod impact test were performed.
- the thickness of the test piece used was 3.2 mm, and the test piece was tested at a moisture content of 0.1% or less, an ambient temperature of 23 ° C, and a humidity of 50%.
- A— 1 to A— 8 components • A-1: Acrylic polymer with aminoalkylene group in the side chain "Polyment” (registered trademark) SK-1000 made by Nippon Shokubai Co., Ltd.
- A—2 Acrylic polymer having an aminoalkylene group in the side chain “Polyment” (registered trademark) NK— 350 Amine hydrogen equivalent 1400gZeq manufactured by Nippon Shokubai Co., Ltd.
- A—3 Acrylic polymer with aminoalkylene group in the side chain “Polyment” (registered trademark) NK—100PM Amine hydrogen equivalent 400gZeq manufactured by Nippon Shokubai Co., Ltd.
- A-4 Copolymer of oxazoline group-containing monomer and styrene
- A—5 Copolymer of oxazoline group-containing monomer and acrylic monomer “Epocross” (registered trademark) RPS— 1005 oxazodine equivalent 3,700 g / eq
- Carbon fiber "Tore force” (registered trademark) manufactured by Toray Industries, Inc. Weight per unit length 0.8 g / m
- Carbon fiber "Tore force” (registered trademark) manufactured by Toray Industries, Inc. Weight per unit length 0.8 g / m
- B—3 Basalt fiber (basalt yarn made by dissolving basalt into long fibers) Specific gravity 2.8 g / cm 3
- Unmodified polypropylene resin Sumitomo Mitsui Polyolefin Co., Ltd. 3 ⁇ 4 [830HV 50 parts by weight Acid-modified polypropylene resin: Mitsui Chemicals, "Admer” (registered trademark) QE800 50 parts by weight
- Unmodified polypropylene resin Sumitomo Mitsui Polyolefin Co., Ltd. 3 ⁇ 4 [830HV 90 parts by weight Acid-modified polypropylene resin: "Admer” (registered trademark) QB510 10 parts by weight, manufactured by Mitsui Chemicals Co., Ltd.
- Examples 1 to 10 and Comparative Examples 1 to 5 are examples of injection molding materials and comparative examples.
- a 5% by weight solution of A-1 (acrylic polymer) was prepared as a sizing agent, applied to B-1 (carbon fiber) by an immersion method, and dried at a temperature of 140 ° C for 5 minutes.
- the adhesion amount of A-1 (acrylic polymer) was 1.5 parts by weight with respect to 100 parts by weight of B-l (carbon fiber).
- Step I B-l (carbon fiber) with sizing agent adhered was cut into 1/4 inch with a cartridge cutter.
- the pellet-shaped molding material obtained in the extrusion process was used as a test piece for characteristic evaluation at Nippon Steel Works Ltd. 3 ⁇ 4 [350 ° C injection molding machine, cylinder temperature: 220 ° C, mold temperature: 60 ° C. (Molded product) was molded.
- the obtained specimens were left for 24 hours in a constant temperature and humidity chamber adjusted to a temperature of 23 ° C and 50% RH, and then subjected to a characteristic evaluation test.
- the obtained test piece for characteristic evaluation (molded product) was evaluated according to the above-described injection molded product evaluation method.
- the evaluation results are summarized in Table 1.
- the ratio of B-1 (carbon fiber) in the obtained molded product was 20% by weight.
- Step III of Example 1 C-1 (maleic anhydride-modified polypropylene resin pellet) was not used, but C-2 (mixed of unmodified polypropylene resin and acid-modified polypropylene resin) was used. Same as Example 1. The evaluation results of the obtained molded product are shown in Table 1. The proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- Example 1 The same procedure as in Example 1 was conducted except that A-1 (acrylic polymer) was not used and A-2 (acrylic polymer) was used in Step I of Example 1.
- Table 1 shows the evaluation results of the obtained molded product.
- the proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- Example 1 In the step I of Example 1, the same procedure as in Example 1 was carried out except that A-1 (acrylic polymer) was not used and A-3 (acrylic polymer) was used. Table 1 shows the evaluation results of the obtained molded product. The proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- a 5 wt% solution of A-1 (acrylic polymer) was prepared, applied to B-1 (carbon fiber) by the dipping method, and dried at a temperature of 140 ° C. for 5 minutes.
- the adhesion amount of A-1 (acrylic polymer) was 1.5 parts by weight with respect to 100 parts by weight of B-1 (carbon fiber).
- a 5 weight aqueous dispersion of D-1 (hydrous maleic acid-modified polypropylene resin) was prepared, and B-1 (carbon fiber) to which A-1 (acrylic polymer) was adhered was obtained by dipping. Soaked through a roller And then dried at 140 ° C. for 5 minutes.
- the adhesion amount of D-1 (maleic anhydride-modified polypropylene resin) was 1.5 parts by weight with respect to 100 parts by weight of B-1 (carbon fiber).
- step I the carbon fiber with the sizing agent attached was cut into 1/4 inch with a cartridge cutter.
- the pellet-shaped molding material obtained in the extrusion process was used as a test piece for characteristic evaluation at Nippon Steel Works, Ltd. 3 ⁇ 4 [350 ° C injection molding machine, cylinder temperature: 220 ° C, mold temperature: 60 ° C. (Molded product) was molded.
- the obtained specimens were left for 24 hours in a constant temperature and humidity chamber adjusted to a temperature of 23 ° C and 50% RH, and then subjected to a characteristic evaluation test.
- the obtained test piece for characteristic evaluation (molded product) was evaluated according to the above-described injection molded product evaluation method.
- the evaluation results are summarized in Table 1.
- the ratio of B-1 (carbon fiber) in the obtained molded product was 20% by weight.
- Example 1 was carried out in the same manner as in Example 1 except that D-2 (acrylic acid-modified polyethylene) was used in place of D-1 instead of D-1.
- Table 1 shows the evaluation results of the obtained molded product.
- the proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- Step I of Example 1 the same procedure as in Example 1 was conducted except that A-4 (an oxazoline group-containing polymer) was used instead of A-1 (acrylic polymer). Evaluation of the obtained molded product The results are shown in Table 1. The proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- a 5% by weight aqueous solution of A-4 (oxazoline group-containing polymer) was prepared, applied to B-1 (carbon fiber) by an immersion method, and dried at a temperature of 140 ° C for 5 minutes.
- the adhesion amount of A-4 (oxazoline group-containing polymer) was 1.5 parts by weight with respect to 100 parts by weight of B-l (carbon fiber).
- step I the carbon fiber with the sizing agent attached was cut into 1/4 inch with a cartridge cutter.
- B-1 carbon fiber cut in the previous step was supplied, kneaded sufficiently at a barrel temperature of 300 ° C and a rotation speed of 150 rpm, and further degassed from a vacuum vent downstream.
- the supply was adjusted to 25 parts by weight of B-1 (carbon fiber) with respect to 100 parts by weight of polypropylene resin using a weight feeder. Molten resin was discharged from a die port (diameter 5 mm), and the obtained strand was cooled and cut with a cutter to obtain a pellet-shaped molding material.
- the pellet-shaped molding material obtained in the extrusion process was used as a test piece for characteristic evaluation at Nippon Steel Works Ltd. 3 ⁇ 4 [Cylinder temperature: 300 ° C, mold temperature: 80 ° C using a 350mm injection molding machine. (Molded product) was molded. The obtained specimens were left for 24 hours in a constant temperature and humidity chamber adjusted to a temperature of 23 ° C and 50% RH, and then subjected to a characteristic evaluation test. Next, the obtained test piece for characteristic evaluation (molded product) was evaluated according to the above-described injection molded product evaluation method. The evaluation results are summarized in Table 1. The ratio of B-1 (carbon fiber) in the obtained molded product was 20% by weight.
- Step I of Example 1 the same procedure as in Example 1 was carried out except that A-5 (an oxazoline group-containing polymer) was used without using Al (acrylic polymer). Evaluation of the obtained molded product The results are shown in Table 1. The proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- B-1 carbon fiber
- B 3 basic fiber
- Table 1 shows the evaluation results of the obtained molded product.
- the proportion of B-3 (basalt fiber) in the molded product was 20% by weight.
- Example 1 The same procedure as in Example 1 was conducted except that A-1 (acrylic polymer) was not used in Step I of Example 1. Table 1 shows the evaluation results of the obtained molded product. The proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- Example 2 The same procedure as in Example 2 was performed except that A-1 (acrylic polymer) was not used in Step I of Example 2.
- Table 1 shows the evaluation results of the obtained molded product.
- the proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- Example 5 was the same as Example 5 except that A-1 (acrylic polymer) and D-1 were not used in Step I of Example 5.
- Table 1 shows the evaluation results of the obtained molded product.
- the proportion of B-1 (carbon fiber) in the molded product was 20% by weight.
- Example 8 The same procedure as in Example 8 was conducted except that A-4 (an oxazoline group-containing polymer) was not used in Step I of Example 8.
- Table 1 shows the evaluation results of the obtained molded product.
- the proportion of B 1 (carbon fiber) in the molded product was 20% by weight.
- Example 10 The same procedure as in Example 10 was performed except that A-1 (acrylic polymer) was not used in Step I of Example 10.
- Table 1 shows the evaluation results of the obtained molded product.
- the proportion of B-3 (basalt fiber) in the molded product was 20% by weight.
- the fiber reinforced thermoplastic resin compositions of Examples 3, 4, 7, and 9 are superior in mechanical properties to the fiber reinforced thermoplastic resin composition of Comparative Example 1.
- the fiber-reinforced thermoplastic resin composition of Example 2 is superior in mechanical properties to the fiber-reinforced thermoplastic resin composition of Comparative Example 2.
- the fiber-reinforced thermoplastic resin composition of Examples 5 and 6 is superior in mechanical properties to the fiber-reinforced thermoplastic resin composition of Comparative Example 3.
- the fiber-reinforced thermoplastic resin composition of Example 8 is superior in mechanical properties to the fiber-reinforced thermoplastic resin composition of Comparative Example 4.
- the fiber-reinforced thermoplastic resin composition of Example 10 is superior in mechanical properties to the fiber-reinforced thermoplastic resin composition of Comparative Example 5.
- Examples 11 and 12 and Comparative Examples 6 and 7 are examples and comparative examples of press-molded materials.
- B-1 carbon fiber
- Basis weight was 190gZm 2.
- step I Place the B-1 (carbon fiber) web obtained in step I on a 20cm x 20cm stainless steel plate. After that, 30 g of 0.5% by weight aqueous dispersion of A-1 (acrylic polymer) as a binder was applied and dried at a temperature of 140 ° C. for 60 minutes.
- A-1 acrylic polymer
- B-1 carbon fiber
- Basis weight was 190gZm 2.
- A-l (acrylic polymer) 0.5 wt% aqueous dispersion was sprayed at a temperature of 140 ° C for 60 minutes.
- 30 g of a 0.5 wt% aqueous dispersion of D-1 (maleic anhydride-modified polypropylene resin) was sprayed and dried at a temperature of 140 ° C. for 60 minutes.
- Total basis weight was 200gZm 2.
- Example 6 (Comparative Example 6) The procedure was the same as Example 11 except that A-1 (acrylic polymer) was not used in Step II of Example 11. Table 2 shows the evaluation results of the obtained molded product. The proportion of B-1 (carbon fiber) in the molded product was 30% by weight.
- Example 12 was the same as Example 12 except that A-1 (acrylic polymer) and D-1 (maleic anhydride-modified polypropylene resin) were not used in Step II of Example 12.
- Table 2 shows the evaluation results of the obtained molded product.
- the proportion of B-1 (carbon fiber) in the molded product was 30% by weight.
- the fiber-reinforced thermoplastic resin composition of Example 11 is superior in mechanical properties to the fiber-reinforced thermoplastic resin composition of Comparative Example 6.
- the fiber-reinforced thermoplastic resin composition of Example 12 is superior in mechanical properties to the fiber-reinforced thermoplastic resin composition of Comparative Example 7.
- Examples 13 to 19 and Comparative Examples 8 to 11 are examples and comparative examples of carbon fiber for thermoplastic resin.
- a 5% by weight aqueous solution of A-1 (acrylic polymer) was prepared, applied to B-1 (carbon fiber) by an immersion method, and dried at a temperature of 140 ° C. for 5 minutes.
- the adhesion amount of A-1 (acrylic polymer) was 1.5 parts by weight with respect to 100 parts by weight of B-l (carbon fiber).
- E-1 (bundling agent) adjusted to 1% by weight aqueous dispersion was placed in a container, and A-1 (carbon fiber) with B-1 attached thereto was immersed in the container via a roller. After 5 minutes at a temperature of 140 ° C Allowed to dry.
- E-1 (Bundling agent) adhesion amount is (A-1) 100 parts by weight of carbon fiber,
- the carbon fiber obtained in the I. sizing agent application step was cut into 1 Z4 inch with a cartridge cutter.
- the pellet-shaped molding material obtained in the extrusion molding process was tested for characterization using Nippon Steel Works Co., Ltd. 3 ⁇ 4 [350 mm type injection molding machine, cylinder temperature: 220 ° C, mold temperature: 60 ° C. A piece (molded product) was formed. The obtained specimen was left for 24 hours in a constant temperature and humidity chamber adjusted to a temperature of 23 ° C and 50% RH, and then subjected to a characteristic evaluation test. Next, the obtained test piece for characteristic evaluation (molded product) was evaluated according to the above-described injection molded product evaluation method. The evaluation results are summarized in Table 3. The weight ratio of B-1 (carbon fiber) and polypropylene resin in the obtained molded product was 31.6Z100.
- Example 3 (acrylic polymer) was used in Step I of Example 13.
- Table 3 shows the evaluation results of the obtained molded product.
- the weight ratio of B-1 (carbon fiber) to polypropylene resin in the obtained molded product was 31.6Z100.
- Sizing agent application process A 5% by weight solution of A-2 (acrylic polymer) was prepared, applied to B-1 (carbon fiber) by an immersion method, and dried at a temperature of 140 ° C for 5 minutes. The adhesion amount of A-2 was 1.5 parts by weight with respect to 100 parts by weight of B-1 (carbon fiber). The following steps II to IV were performed in the same manner as in Example 13. The weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6Z100. The results are shown in Table 3.
- a 5% by weight solution of ⁇ -4 (oxazoline group-containing polymer) was prepared, applied to B-1 (carbon fiber) by an immersion method, and dried at a temperature of 140 ° C for 5 minutes.
- the adhesion amount of A-4 was 1.5 parts by weight with respect to 100 parts by weight of B-1 (carbon fiber).
- the following steps II to IV were the same as in Example 13.
- the weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6Z100. The results are shown in Table 3.
- a 5% by weight solution of ⁇ -5 (oxazoline group-containing polymer) was prepared, applied to ⁇ -1 (carbon fiber) by an immersion method, and dried at a temperature of 140 ° C for 5 minutes.
- the adhesion amount of A-5 was 1.5 parts by weight with respect to 100 parts by weight of B-1 (carbon fiber).
- the following steps II to IV were the same as in Example 13.
- the weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6Z100. The results are shown in Table 3.
- a 5% by weight solution of ⁇ -3 (acrylic polymer) was prepared, applied to B-1 (carbon fiber) by an immersion method, and dried at a temperature of 140 ° C for 5 minutes.
- the adhesion amount of A-3 was 1.5 parts by weight with respect to 100 parts by weight of B-1 (carbon fiber).
- a 5 wt% aqueous dispersion of D-1 (polymer) was prepared, applied to B-1 (carbon fiber) by an immersion method, and dried at a temperature of 140 ° C. for 5 minutes.
- the adhesion amount of D-1 (polymer) was 0.5 part by weight with respect to 100 parts by weight of B-1 (carbon fiber).
- the following steps II to IV were the same as those in Example 1.
- the weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6Z100. result Are shown in Table 3.
- Example 14 The same procedure as in Example 14 was performed except that B-3 (carbon fiber) was used in Example 14.
- the weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6 /
- Example 13 The same procedure as in Example 13 was conducted except that A-1 (acrylic polymer) was not added in the application step of I. sizing agent in Example 13.
- the weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6Z100. The results are shown in Table 3.
- Example 15 I. Except that A-2 (acrylic polymer) was not used and A-6 (polymethyl methacrylate) adjusted to a 5 wt% tetrahydrofuran solvent solution was used in the sizing agent application step. Was carried out in the same manner as in Example 15. The adhesion amount of A-6 was 1.5 parts by weight with respect to 100 parts by weight of B-1 (carbon fiber). The weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6Z100. The results are shown in Table 31.
- Example 15 Example 1 except that A-2 (acrylic polymer) was not used in the sizing agent application step and A-7 (polyacrylamide) adjusted to a 5% by weight aqueous solution was used. It carried out like 15. The adhesion amount of A-7 was 1.5 parts by weight with respect to 100 parts by weight of B-1 (carbon fiber). The weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6Z100. The results are shown in Table 3.
- Example 15 I Example 15 except that A—2 (acrylic polymer) was not used in the sizing agent application step and A-8 (polyamide) adjusted to a 5 wt% aqueous solution was used. The same procedure was performed. The adhesion amount of A-8 was 1.5 parts by weight with respect to 100 parts by weight of B-l (carbon fiber). The weight ratio of carbon fiber to polypropylene resin in the obtained molded product was 31.6 / 100. The results are shown in Table 3.
- A—2 acrylic polymer
- A-8 polyamide
- Example 1 4 A-3 B-1 C-5-E-1 149 10. 5 41 76
- Examples 13 to 19 and Comparative Example 8 to shown in Table 3 From these results, the following is clear. That is, the carbon fiber reinforced thermoplastic resin compositions of Examples 13 to 17 are excellent in mechanical properties as compared with the carbon fiber reinforced thermoplastic resin compositions of Comparative Examples 8 to 11. Also in Example 18, a carbon fiber reinforced thermoplastic resin composition having excellent mechanical properties was obtained by further adding the polymer (D). Also in Example 19, by increasing the surface oxygen concentration (OZC) and surface carboxyl group concentration (COOHZC) of the carbon fiber, a carbon fiber reinforced thermoplastic resin composition having further excellent mechanical properties can be obtained. ing.
- OZC surface oxygen concentration
- COOHZC surface carboxyl group concentration
- the fiber-reinforced thermoplastic resin composition of the present invention is excellent in adhesiveness between the reinforcing fiber and the thermoplastic resin, and can sufficiently improve the mechanical properties of the molded product.
- a molded article using the thermoplastic resin composition of the present invention is suitably used for electrical / electronic equipment, OA equipment, home appliances, automobile parts, internal members, and casings.
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Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
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| US11/992,760 US20090143524A1 (en) | 2005-09-29 | 2006-09-27 | Fiber-Reinforced Thermoplastic Resin Composition, Method for Producing the Same, and Carbon Fiber for Thermoplastic Resin |
| EP06810639A EP1930374A4 (en) | 2005-09-29 | 2006-09-27 | FIBER-REINFORCED THERMOPLASTIC COMPOSITION, PRODUCTION METHOD AND CARBON FIBER FOR THERMOPLASTIC ADHESIVE |
| JP2007511555A JPWO2007037260A1 (ja) | 2005-09-29 | 2006-09-27 | 繊維強化熱可塑性樹脂組成物、その製造方法、及び熱可塑性樹脂用炭素繊維 |
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| JP2005283960 | 2005-09-29 | ||
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| JP2006017227 | 2006-01-26 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20080063775A (ko) | 2008-07-07 |
| TW200732388A (en) | 2007-09-01 |
| JPWO2007037260A1 (ja) | 2009-04-09 |
| US20090143524A1 (en) | 2009-06-04 |
| EP1930374A1 (en) | 2008-06-11 |
| EP1930374A4 (en) | 2008-09-24 |
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