JPH04168142A - Stabilized resin composition - Google Patents

Abstract

PURPOSE:To obtain a resin composition having excellent impact resistance, thermal stability and environmental cracking resistance and suitable for automobile parts, etc., by compounding a polyphenylene ether resin with specific amounts of an impact-resistant styrene resin containing partially hydrogenated conjugated diene rubber, etc. CONSTITUTION:The objective resin composition is produced by compounding (A) 10-90 pts.wt. of a polyphenylene ether resin [e.g. poly(2,6-dimethyl-1,4- phenylene) ether] with (B) 90-10 pts. wt. of an impact-resistant styrene resin containing a partially hydrogenated conjugated diene rubber wherein 5-70wt.% of the total double bond of the conjugated diene rubber is hydrogenated and the contents of 1,2-vinyl bond and 1,4-vinyl bond are <=3wt.% and >=30wt.%, respectively, (C) 0-80 pts.wt. of a styrene resin and (D) 0.01-5 pts.wt. of a heat- stabilizer composed of a hindered phenol or a hindered phenol and an organic phosphorous acid ester.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a resin composition having excellent impact resistance, thermal stability and environmental cracking resistance. More specifically, when reinforcing polyphenylene ether-based resin with impact-resistant styrene-based resin, impact-resistant styrene containing partially hydrogenated conjugated diene-based rubber in which a portion of all double bonds of the conjugated diene-based rubber is hydrogenated is used. The present invention relates to a resin composition having improved impact resistance, thermal stability, and environmental cracking resistance, which is obtained by using a styrene-based resin and further blending a heat stabilizer sufficient to stabilize the impact-resistant styrenic resin.

[Conventional technology]

Polyphenylene ether resin has excellent heat resistance, electrical properties, acid resistance, alkali resistance, etc., as well as low specific gravity and low water absorption. However, it has low fluidity and cannot be processed by melt molding. It also has the disadvantage of being somewhat brittle due to its low impact strength. In order to improve these drawbacks at the same time, a technique of blending high-impact polystyrene containing a polybutadiene component was developed and disclosed in US Pat. No. 3,383,435. In addition, a technology for compounding impact-resistant polystyrene using polybutadiene with a specified microstructure was developed in the Japanese Patent Publication Publication No. 1973-
It is disclosed in Japanese Patent No. 20537. The technology of Tokkosho is characterized in that the contents of 1,4-cis bonds and vinyl groups in the entire microstructure of polybutadiene are 50% by weight or more and 10% by weight or less, respectively.

However, with these technologies, the total amount of double bonds does not change regardless of the microstructure, so there is no extreme difference in the degree of physical property change due to oxidative deterioration etc. due to the chemical instability of double bonds. Therefore, it was extremely difficult to avoid deterioration of physical properties due to melt molding, heat exposure, light exposure, etc.

On the other hand, a technology for reinforcing with a hydrogenated styrene-butadiene block copolymer containing almost no double bonds is disclosed, for example, in JP-A-50-71742; Although the rubber particles of the impact-resistant styrenic resin do not contain dispersed particles of styrene polymer, the rubber efficiency is low, and it is necessary to add a large amount of rubber component to improve impact resistance. was there. Furthermore, because the affinity between the hydrogenated styrene-butadiene block copolymer and the polyphenylene ether resin is not always sufficient, molded products often peel. In addition, the higher the hydrogenation rate of the 1,4-butadiene component in the butadiene block, the higher the glass transition point of the rubber component, making it impossible to obtain sufficient low-temperature impact resistance with this technique.

Separately, a technique for improving the impact strength while maintaining the rigidity of impact-resistant styrene resin is disclosed in Japanese Patent Application Laid-open No. 64-90208. It has been shown that impact strength is improved compared to conventional impact styrenic resins. However, resin compositions containing polyphenylene ether resins are characterized by high heat resistance, and one of the techniques disclosed in this publication
．． In regions with a large number of 2-vinyl residues, there is a problem in that physical properties deteriorate significantly when molded at high temperatures or exposed to heat. Furthermore, there are problems such as not being able to obtain low-temperature impact strength in the region where the hydrogenation rate is high, and it is difficult to fully satisfy the technical range of impact-resistant styrene resins that are required to improve the physical properties of polyphenylene ether resins. It cannot be used as an indicator of

[Problem to be solved by the invention]

The object of the present invention is to solve the above-mentioned problems when imparting moldability and impact resistance to polyphenylene ether-based resins, while preventing deterioration of physical properties due to melt processing or heating such as thermal exposure. The object of the present invention is to obtain a polyphenylene ether resin composition which has a better balance of low-temperature impact resistance, rigidity, environmental crack resistance, etc. than other resin compositions.

[Means and effects for solving the problem] As a result of research, the present inventors found that when reinforcing a polyphenylene ether resin with an impact-resistant styrene resin containing a conjugated diene rubber, The greater the amount of double bonds, the more susceptible it is to oxidative deterioration and the greater the decline in physical properties.Furthermore, as the amount of 1,2-vinyl bonds among double bonds increases, oxidative deterioration is accelerated and the styrenic resin component It was found that this also induces main chain splitting, resulting in a decrease in physical properties.

If the total amount of double bonds is more than necessary, thermal stability and rigidity will decrease, and if it is less than necessary, low-temperature impact strength will decrease, so there is an appropriate amount of double bonds to maintain the balance of physical properties. I found out what to do. In addition, when an impact-resistant styrenic resin containing partially hydrogenated conjugated diene rubber is added to a polyphenylene ether resin, the resistance is significantly higher than that of a conventional impact-resistant styrene resin containing a conjugated diene rubber. It has been found that it exhibits impact strength and environmental cracking resistance.

Furthermore, when a compound such as a sterically hindered phenol is blended as a heat stabilizer, the thermal stability is improved to an extent that cannot be predicted from the effect when using a conventional impact-resistant styrenic resin containing a conjugated diene rubber. It has been found that the deterioration of impact resistance and environmental cracking resistance due to thermal history is extremely small, so that it exhibits excellent impact resistance and environmental cracking resistance. Furthermore, the inventors have discovered that the thermal stabilization effect can be further improved by using compounds such as organic phosphites, alkanolamines, and alkylamine alkylene oxide derivatives in combination with the above, and have completed the present invention.

That is, the present invention comprises: (a) 10 to 90 parts by weight of a polyphenylene ether resin; (b) 5 to 7 of the total double bonds of the conjugated diene rubber;
90 to 10 parts by weight of an impact-resistant styrenic resin containing partially hydrogenated conjugated diene rubber with 0% by weight hydrogenation, (c) 0 to 80 parts by weight of a styrenic resin, and (d) 0.01 parts by weight of a heat stabilizer. ~5 parts by weight, and the amount of 1,2-vinyl bonds and the amount of 1,4-bonds contained in the partially hydrogenated conjugated diene rubber in component (b) are 3% by weight or less and 30% by weight, respectively. The above provides a stabilized resin composition characterized in that component (d) is a heat stabilizer mainly composed of sterically hindered phenols or sterically hindered phenols and organic phosphites. It is.

The resin composition of the present invention may be retained in a molding machine at high temperature,
Even if exposed to heat near the heating deformation temperature, physical property deterioration is unlikely to occur.

In addition, compared to conventional technology, the impact resistance increases with the same amount of rubber, so in order to obtain the same impact resistance strength, a smaller amount of rubber is required. Since the amount of rubber is small, the composition becomes difficult to burn, and even when flame retardant is desired, it has the advantage that the objective can be achieved with a small amount of flame retardant.

Furthermore, the resin composition of the present invention has the advantage that it can achieve a balance of physical properties such as rigidity, low-temperature impact resistance, and environmental cracking resistance that cannot be achieved using conventional techniques.

The polyphenylene ether resin used in the present invention has the general formula (wherein R1, R2, R3, R4, R5, and R6 are monovalent residues such as an alkyl group having 1 to 4 carbon atoms, an aryl group, a halogen, and hydrogen). group, and R5 and R6 are not hydrogen at the same time.

) is the repeating unit, and the constituent units are [A] and [B] above.
A homopolymer or a copolymer consisting of the following can be used.

A typical example of a homopolymer of polyphenylene ether resin is poly(2,6-cymethyl-1,4-phenylene).
Ether, poly(2-methyl-6-ethyl-1,4-phenylene) ether, poly(2,6-danityl-1,4
-phenylene) ether, poly(2-ethyl-6-n propyl-1,4-phenylene) ether, poly(2,6
-di-n-propyl-1,4-)unilene) ether, poly(2-methyl-6-n-butyl-1,4-phenylene)
Ether, poly(2-ethyl-6-itubrobyl-1,
4-) unilene) ether, poly(2-methyl-6-chloro-1,4-phenylene) ether, poly(2-methyl-6-hydroxyethyl-1,4-phenylene) ether, poly(2-methyl- 6-chloroethyl-1,4-
Examples include homopolymers such as phenylene) ether.

The polyphenylene ether copolymer is a copolymer of 2,6-dimethylphenol and 2,3,8-trimethylphenol, a copolymer of 0-cresol, or a copolymer of 2,3,6-trimethylphenol and 0-cresol. It includes polyphenylene ether copolymers mainly having a polyphenylene ether structure, such as copolymers with

In the present invention, the content of the polyphenylene ether resin is preferably in the range of 10 to 90 parts by weight. Content is 10
If it is less than 90 parts by weight, the improvement effect of the polyphenylene ether resin will not be sufficiently exhibited, and it is not preferable. If it exceeds 90 parts by weight, the impact-resistant styrene resin will be used in an amount sufficient to improve moldability or impact resistance. This is not preferable because it becomes impossible to add resin.

The partially hydrogenated conjugated diene rubber used in the present invention can be obtained by partially hydrogenating a conjugated diene rubber obtained by a known method. Conjugated diene rubbers obtained by known methods include all rubbers normally used in the production of impact-resistant styrene resins. For example, polybutadiene (low-cis and high-cis polybutadiene), styrene-butadiene copolymer, polyisoprene,
Butadiene-isoprene copolymer, natural rubber, etc.
Among them, polybutadiene is most preferred.

The preferred amount of 1,2-vinyl bonds in the total double bonds of the conjugated diene rubber is not particularly limited as it varies depending on the hydrogenation rate of the total double bonds, but -5% by weight for boat fishing. The above is desirable. When the hydrogenation rate is increased to improve thermal stability, rubber elasticity is lost, but 1.
This is because the greater the amount of 2-vinyl bonds, the smaller the degree of decrease in rubber elasticity.

In the present invention, in the partially water-based conjugated diene rubber, 5 to 70% by weight of all double bonds are hydrogenated, and 1.2-
The amount of vinyl bonds is preferably 3% by weight or less, preferably 2% by weight or less, and the amount of 1,4-bonds is 30% by weight.
The above is desirable.

If the hydrogenation rate of all double bonds is less than 5% by weight, the effect of partial hydrogenation will not be sufficiently exhibited. For example, even if a conjugated diene rubber containing 8% by weight of 1,2-vinyl before hydrogenation is hydrogenated by 5% by weight, the 1,2-vinyl content cannot be reduced to 3% by weight or less, and all double bonds Hydrogenation of 5% by weight of the amount results in little improvement in impact resistance and environmental cracking resistance. If the hydrogenation rate exceeds 70% by weight, it is not preferable because impact resistance, especially low-temperature impact resistance, cannot be obtained sufficiently. If the amount of 1,2-vinyl bonds contained in the partially hydrogenated conjugated diene rubber exceeds 3% by weight, the rubber component will be oxidized and the main chain splitting of the styrene resin will be more likely to occur, resulting in poor thermal stability. It is not preferable because it cannot sufficiently improve the Furthermore, if the amount of 1.4-bonds is less than 30% by weight, the effect of improving impact resistance becomes poor, which is not preferable.

The partially hydrogenated conjugated diene rubber used in the present invention can be obtained by partially hydrogenating the above-mentioned conjugated diene rubber. Any conventionally known hydrogenation method may be used, for example, P, L, Ramp.

et al., J., Amer, Chew.
Soc,, 83. 4672 (1961).

Hydrogenation method using triisobutylborane catalyst as described, Hung Yu Chen, J, Po1)+
g, Sci.

Po1y+g, Letter Ed,, 15.2
71 (1977), a method of hydrogenation using toluenesulfonyl hydrazide, or Japanese Patent Publication No. 42
Examples include a method of hydrogenating an organic cobalt-organoaluminum catalyst or a nickel-organoaluminum catalyst described in No. 8704.

A particularly preferred method of hydrogenation in the practice of the present invention is:
The method shown in JP-A-52-41890 uses a catalyst that can selectively hydrogenate 1,2-vinyl bonds prior to 1,4-bonds, or hydrogenation can be carried out under mild conditions at low temperature and low pressure. JP-A-59-133203 using a catalyst,
This is a method disclosed in Japanese Patent Application Laid-Open No. 60-220147.

In the present invention, the content of the impact-resistant styrene resin containing partially hydrogenated conjugated diene rubber is preferably selected from the range of 90 to 10 parts by weight. If the content exceeds 90 parts by weight, the required amount of polyphenylene ether resin cannot be added, and if the content is less than 10 parts by weight, the partially hydrogenated conjugated diene rubber cannot be sufficiently contained, resulting in poor impact resistance. Also, the environmental cracking resistance cannot be sufficiently improved, which is not preferable.

Examples of the styrene resin used in the present invention include styrene compounds, compounds copolymerizable with styrene compounds, and rubbery polymers.

A styrene compound has a general formula (wherein R represents hydrogen, lower alkyl, or halogen, Z is selected from the group consisting of vinyl, hydrogen, halogen, and lower alkyl, and p is an integer of 0 to 5.) means a compound represented by

Specific examples of these include styrene, α-methylstyrene, 2,4-dimethylstyrene, monochlorostyrene,
dichlorostyrene, p-methylstyrene, p-tar
Examples include t-butylstyrene and ethylstyrene.

Compounds that can be copolymerized with styrene compounds include methacrylic esters such as methyl methacrylate and ethyl methacrylate; acrylic esters such as butyl acrylate and 2-ethylhexyl acrylate; unsaturated compounds such as acrylonitrile and methacrylate. Nitrile compounds include acid anhydrides such as maleic anhydride, and are used together with styrene compounds. In addition, examples of rubbery polymers include conjugated diene rubber and ethylene-propylene copolymer rubber, which together with partially hydrogenated conjugated diene rubber contain 1,
It is necessary that the amount of 2-vinyl bond and the amount of 1.4 bond are 3% by weight or less and 30% by weight or more, respectively.

In the present invention, the styrene resin is used to adjust the heat distortion temperature and moldability, and if the purpose is achieved by the impact-resistant styrene resin containing partially hydrogenated conjugated diene rubber, it may not be added. Good, but up to 80 parts by weight can be added if necessary.

If it exceeds 80 parts by weight, it is not preferable because the required amount of impact-resistant styrene resin containing polyphenylene ether resin and partially hydrogenated conjugated diene rubber cannot be added.

The sterically hindered phenols that are the heat stabilizers used in the present invention are not particularly limited, but preferably have one or more -S- groups and/or isocyanuric rings and/or -〇-〇- in the structural formula. Sterically hindered phenols having a group are desirable, and specific examples include 2-t-butyl-6-(3'-
t-Butyl-5'-methyl-2'-hydroxybenzyl)-4-methylphenylacrylate, N,N'-
Hexamethylenebis[3,5-di-t-butyl-4-hydroxy-hydrocinnamamide, 1,6-hexanethiol bis[3-(3,5-di-t-butyl-4-hydroxyphenyl) ) propionate], pentaerythrityl-tetrakis [3-(3,5-di-t-butyl-4-
hydroxyphenyl)propionate, 2,2-thio-
Diethylenebis[3-(3,5-di-t-butyl-4-
hydroxyphenyl)propionate], triethylene glycol-bis(3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate, 3.9-
Bis[1,1-dimethyl-2-(3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy)ethyl)-2,4,8,IO-tetraoxapyro(5, 5) Undecane, 4,4'-thio-bis-(3-methyl-6-t-butylphenol), 2.4
-bis-(n-octylthio)-6~ (4-hydroxy-3,5-di-t-butylanilino)-1,3,5-
triazine, tris-(3,5-di-t-butyl-4-
Examples include hydroxybenzyl)-isocyanurate.

The organic phosphites used in combination with the sterically hindered phenols, which are the heat stabilizers used in the present invention, are not particularly limited, but specific examples include triphenylphosphite, trinonylphenylphosphite, diphenyldecyl phosphite, didecyl phenyl phosphite, tridecyl phosphite, distearyl pentaerythritol phosphite, 4,4'-isopropylidene diphenol alkyl phosphite, tris(2,4-di-t-butylphenyl) phosphite, Tridodecyltrithiophosphite and the like can be mentioned.

Further, in the present invention, a stabilizer can be used in which alkanolamines and/or alkylene oxide derivatives of alkylamines are further added to sterically hindered phenols, or sterically hindered phenols and organic phosphite esters.

At that time, the amines and amine substitutes used in combination are alkanolamines represented by the following formula (I), (n)
(m) An alkylamine alkylene oxide derivative represented by the formula (TV) and an amine represented by the formula (V), either singly or as a mixture.

(I) N(R4)3 (Each R4 is independently hydrogen or a lower alkanol having 1 to 4 carbon atoms, and at least two R4 are alkanols.) (II) RNH-(R60), H (R5 is an alkyl group, R6 is an alkyl group having 2 to 4 carbon atoms, and p is an integer of 1 to 50.) (R7 is an alkyl group,
R8 and R9 are alkyl groups having 2 to 4 carbon atoms, and m and n are 1 to 4.
It is an integer of 50. ) (Rlo is an alkyl group, R11 is an alkyl group having 1 to 4 carbon atoms, R12'R13' R1
4 is an alkyl group having 2 to 4 carbon atoms, p-Q, r is 1 to 50
is an integer. )(V) A compound containing an N-CH2-CH2-N skeleton in the amine molecule, and the following (i), (i
Compound (i) represented by f) (N) HN (cH2・CH2NH) 1CH2C
H2NH2 (integer from t-0 to 2) Typical examples are jetanolamine, triethanolamine, diisopropanolamine, triisopropanolamine, jetanolamine, tributanolamine,
Dodecylethanolamine, (x10y-2).

(x+y=7).

(x+y-2).

(x+y-4).

(x+y-10).

(x+y=20).

(R; beef tallow, y, + y 1z −3) +(R;
Beef tallow, x+y+z-8).

(x+y=2).

(x+y-4).

N,N' diphenylethylenediamine, triethyltetramine and the like.

In the present invention, the content of the heat stabilizer is preferably in the range of 0.01 to 5 parts by weight. If the content is less than 0.01 parts by weight, there is almost no stabilizing effect, and if it exceeds 5 parts by weight, the heat deformation temperature and impact resistance will be significantly lowered, which is not preferable.

In the present invention, when organic phosphites or alkanolamines are used together, the amount of sterically hindered phenols must be 0.01 parts by weight or more. This is because when the amount of sterically hindered phenols is less than 0.01 parts by weight, the stabilizing effect is hardly exhibited.

The method for producing the impact-resistant styrenic resin of the present invention is not limited, but includes bulk polymerization, which is well known to those skilled in the art,
Any of solution polymerization, emulsion polymerization, and suspension polymerization may be used.

The composition of the present invention may contain other additives, such as plasticizers, ultraviolet absorbers, flame retardants, colorants, mold release agents, and fibrous reinforcing agents such as glass fibers and carbon fibers, as well as glass peas and calcium carbonate. Fillers such as , talc, etc. can be added.

Particularly effective flame retardants include aromatic phosphate esters, red phosphorus, aromatic halogen compounds, and antimony trioxide.

Any method may be used to mix the components constituting the present invention, and for example, an extruder, heated roll, Banbury mixer, kneader, etc. can be used.

〔Effect of the invention〕

The polyphenylene ether resin composition of the present invention not only has excellent durability such as impact resistance, thermal stability, and environmental cracking resistance, but also has a good balance of rigidity and low-temperature impact resistance, and has good moldability and It is a useful molding material because of its excellent electrical properties.

Therefore, the molded article of the composition of the present invention can be used for automobile parts,
Flame-retardant products are suitable for home appliance parts, power distribution parts, etc. for water supply and drainage equipment, etc., and their excellent durability greatly contributes to extending product life.

〔Example〕

Examples are shown below, but the present invention is not limited to the following examples. Hereinafter, % and parts represent weight % and parts by weight, respectively.

The impact-resistant styrene resin used in the following Examples and Comparative Examples was prepared by the manufacturing method described below. In addition, the impact-resistant styrenic resins used in the Examples and Comparative Examples, and the conjugated diene rubbers and partially hydrogenated conjugated diene rubbers used in preparing the resins are as shown in Table 2.

Production Example 1: Production of Partially Hydrogenated Conjugated Diene Rubber The partially hydrogenated conjugated diene rubber used in the examples was typically produced by the method described below.

A butadiene/n-hexane mixture (butadiene concentration 20%) was reacted with an n-butyllithium/n-hexane solution (concentration 5%) at 20 g/hr using a jacketed autoclave with an internal volume of 1 ON and a stirrer as a reactor. ) 7.0m
The ligation polymerization of butadiene was carried out at a polymerization temperature of 110°C. The obtained active polymer was deactivated with methanol, and 8 Il of the polymer solution was transferred to another jacketed reactor with an internal volume of 10.9 cm, and at a temperature of 60°C, di-p was added as a hydrogenation catalyst. -Tolylbis(1-cyclopentagenyl) titanium/cyclohexane solution (concentration 1.2
2. mmol/1)) 25 hl and n-butyllithium solution (a degree 6 mmol/(1) 50 ml at 0°C.
0) The mixture was added under a hydrogen pressure of cg/c-, and the mixture was reacted for 60 minutes at a hydrogen partial pressure of 3.0 kg/c-. To the obtained partially hydrogenated polymer solution, 0.5 part of 2,6-di-tert-butylhydroxytoluene was added as an antioxidant per polymer, and the solvent was removed.

The analytical values of polybutadiene before partial hydrogenation and partially hydrogenated polybutadiene obtained by sampling after methanol deactivation were as shown in Table 1.

(The following is a blank space) Production Example 2: Production of impact-resistant styrenic resin The impact-resistant styrenic resin used in the example was produced by a bulk polymerization method. Representative examples are described below.

Table - 10 parts of partially hydrogenated polybutadiene in 90 parts of styrene
1 part and 8 parts of ethylbenzene, and further added 0.05 part of benzoyl peroxide and 0.10 part of α-methylstyrene dimer based on styrene, and heated at 80°C for 4 hours and at 110°C for 4 hours. Polymerization was carried out at 150° C. for 4 hours with stirring. Further, heat treatment was performed at around 230° C. for 30 minutes, and then unreacted styrene and ethylbenzene were removed under vacuum to obtain an impact-resistant styrenic resin.

The content of partially hydrogenated polybutadiene in the resulting impact-resistant styrenic resin was 11%, and the average particle diameter of the partially hydrogenated polybutadiene containing dispersed particles of polystyrene was 2.7 μm.

Next, a method for measuring and evaluating physical properties of a resin composition will be explained.

(0) Preparation of test piece A test piece was prepared using an injection molding machine (manufactured by Toshiba Machine Corporation, IS80AM, cylinder temperature 280°C, molding cycle 1 minute).

(1) Melting index according to JIS K7210 Temperature: 250°C, Load: 10kg (2) Izot impact strength ASTM D25B, notched: Temperature: 23°C and -30°C (3) Molding stability Injection molding temperature 290 Judgment was made from the retention ratio of the Izot impact strength of the molded product molded after staying in a cylinder at 320°C for 10 minutes with respect to the Izot impact strength of the molded product molded at 320°C.

(4) Heat exposure resistance After racing for 500 hours at a temperature of 110°C,
Judgment was made from the retention of Izot impact strength, tensile and elongation at break, and increase rate of melting index.

Example 1 45 parts of poly(2,6-dimethyl-1,4-phenylene) ether (hereinafter abbreviated as PPE) with an intrinsic viscosity of 0.50 (measured in chloroform at 30°C), sewage 1 of Table-■
high impact polystyrene (hereinafter abbreviated as HIPS)
55 parts and Irganox 565 (sterically hindered phenol manufactured by Ciba Geigy ■, 2,4-bis-(n-octylthio)-6-(4-hydroxy-3,5-di-t-butylanilino)-1,3,5 - A resin composition was obtained by melt-kneading 0.3 parts of triazine at a temperature of 300° C. using an extruder.The results of physical property tests of the resin composition are shown in Table 1.

Example 2 Irganox 565 was reduced to 0.15 parts, and Irgafuos 168 (organic phosphite manufactured by Ciba Geigy Aji Co., Ltd.,
A resin composition was obtained by repeating Example 1 except that 0.15 parts of tris(2,4-di-t-butylphenyl) phosphite) was added. The physical property test results of the resin composition are shown in Table-■
Shown below.

Example 3 A resin composition was obtained by repeating Example 2 except that 2 parts of triethanolamine was added. The physical property test results of the resin composition are shown in Table-■.

Comparative Example 1 Example 1 except that Irganox 565 was not added
A resin composition was obtained by repeating the steps. The physical property test results of the resin composition are shown in Table-■.

Comparative Example 2 Instead of HIPS of NC1,1 in Table-■, 2 in Table-■
A resin composition was obtained by repeating Comparative Example 1 except that HIPS was used. The physical property test results of the resin composition are shown in Table-■.

Comparative Example 3 Instead of No. 1 HIPS in Table ■, Magnetic 2 in Table ■
A resin composition was obtained by repeating Example 1 except that HIPS was used. The physical property test results of the resin composition are shown in Table-■.

Comparative Example 4 A resin composition was obtained by repeating Example 2 except that HIPS No. 2 of Table H was used instead of HIPS No. 1 of Table ■. The physical property test results of the resin composition are shown in Table-■.

Comparative Example 5 Instead of HIPS of Table-■, No. 1, HI of Table-■, No. 2
Example 3 was repeated to obtain a resin composition except that PS was used. The physical property test results of the resin composition are shown in Table-■.

Example 4 80 parts of the same PPE as Example 1, NcL3HI in Table - ■
P 540M,) 5 parts of rifhenylene phosphate, 0.1 part of Irganox 565 and Irgafuos 168
A resin composition was obtained by melt-kneading 0.3 parts of the following at a temperature of 300° C. using an extruder. The physical property test results of the resin composition are shown in Tables ~■.

Comparative Example 6 Example 4 was repeated except that Irganox 565 and Irgafuos 168 were not added to obtain a resin composition.

The physical property test results of the resin composition are shown in Table-■.

Comparative Example 7 A resin composition was obtained by repeating Example 4 except that HIPS in Table 4 of Table 1 was used in place of N (L3 of HIPS in Table 1).Results of physical property tests of the resin composition is shown in Table-■.

Comparative Example 8 A resin composition was obtained by repeating Comparative Example 6 except that HIPS No. 4 in Table ■ was used instead of HIPS No. 3 in Table ■. The physical property test results of the resin composition are shown in Table-■.

Example 5 Instead of HIPS of 1 in Table-■, HI of Magnet 5 in Table-■
Example 2 was repeated to obtain a resin composition except that PS was used. The physical property test results of the resin composition are shown in Table-■.

Comparative Example 9 A resin composition was obtained by repeating Example 2, except that HIPS with Nα6 in Table -■ was used instead of HIPS with Nα1 in Table -■. The physical property test results of the resin composition are shown in Table-■.

Example 6 Instead of Irganox 565, Sumirazar GM (sterically hindered phenol, 2-t-butyl-6 manufactured by Juju Kagakubun) was used.
Example 4 was repeated except that -(3'-t-butyl-5'-methyl-2'-hydroxybenzyl)-4-methylphenylacrylate) was added to obtain a resin composition.

The physical property test results of the resin composition are shown in Table-■.

Example: Instead of Filganox 565, Irganox 245
Example 4 was repeated except for adding (sterically hindered phenol manufactured by Ciba Geigy, triethylene glycol-bis[3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate]) to prepare a resin composition. I got it. The physical property test results of the resin composition are shown in Table-■.

Example 8 Irganox 101 instead of Irganox 565
A resin composition was prepared by repeating Example 4, except that 0 (sterically hindered phenol, pentaerythrityl-tetrakis C3-<3.5-di-t-butyl-4-hydroxyphenyl)propionate, manufactured by Ciba Geigy Corporation) was added. I got it.

The physical property test results of the resin composition are shown in Table-■.

Example 9 A resin composition was obtained by repeating Example 6 except that 3 parts of Nissan Nymeen L202 (alkylamine oxide alkylamine derivative manufactured by NOF Corporation) was added. The physical property test results of the resin composition are shown in Table-■.

(Margin below)

Claims (1)

[Claims] (1) (a) Polyphenylene ether resin 10-90
parts by weight, (b) 90 to 10 parts by weight of an impact-resistant styrenic resin containing a partially hydrogenated conjugated diene rubber in which 5 to 70 weight % of all double bonds in the conjugated diene rubber are hydrogenated, (c ) 0 to 80 parts by weight of a styrene resin and (d) 0.01 to 5 parts by weight of a heat stabilizer, and the amount of 1,2-vinyl bonds contained in the partially hydrogenated conjugated diene rubber as component (b). and 1,4-
A stabilized product characterized in that the bonding amount is 3% by weight or less and 30% by weight or more, respectively, and the component (d) consists of a sterically hindered phenol or a sterically hindered phenol and an organic phosphite. Resin composition.