JP6310630B2 - Airbag base fabric - Google Patents

Description

  The present invention relates to an airbag base fabric used in an automobile, and more particularly to an airbag base fabric that is difficult to burn.

  Conventionally, the required performance of airbag base fabrics used in automobiles is that they are difficult to burn, have excellent air permeability, have a soft texture, and are difficult to open when sewn with a sewing machine. Are listed. As a material satisfying such required performance, one obtained by applying a silicone resin, a polyurethane resin, an acrylic resin, a polyester resin, a polyamide resin or the like to a woven fabric is known (Patent Document 1). Patent Document 1 describes that by using a polyamide resin in particular, an airbag base fabric that satisfies the above-described required performance can be obtained.

JP 2008-13897 A

  The present invention is to provide a base fabric for an air bag that satisfies the required performance by using a specific acrylic resin, and is particularly excellent in that it is difficult to burn, that is, excellent in flame retardancy. It is intended to provide a base fabric for an air bag.

  The present invention solves the above problem by combining two kinds of acrylic polymer particles and containing a specific flame retardant. That is, the present invention includes polymer particles (S1) and (S2) obtained by emulsion polymerization of a polymerizable monomer containing alkyl (meth) acrylate and (meth) acrylic acid in the presence of an emulsifier. An air bag base fabric in which an aqueous resin composition containing an aqueous resin emulsion (A) and a melamine cyanurate (B) is applied to a fabric and dried and solidified, and the polymer particles (S1) and (S2) Is obtained by emulsion polymerization of a polymerizable monomer containing alkyl (meth) acrylate, (meth) acrylic acid and styrene, and the glass transition temperature of the polymer particles (S1) is It is -70 degreeC--10 degreeC, The glass transition temperature of the said polymer particle (S2) is 0-30 degreeC, It is related with the base fabric for airbags characterized by the above-mentioned. In addition, the notation “alkyl (meth) acrylate” represents both alkyl acrylate and alkyl methacrylate together, and may be alkyl acrylate or alkyl methacrylate. Or both may be mixed. The same applies to “(meth) acrylic acid”.

  First, the aqueous resin emulsion (A) used in the present invention will be described. This aqueous resin emulsion (A) is polymer particles (S1) and (S2) obtained by emulsion polymerization of a polymerizable monomer containing alkyl (meth) acrylate and (meth) acrylic acid in the presence of an emulsifier. ). Here, the polymerizable monomer includes at least an alkyl (meth) acrylate and (meth) acrylic acid. The mass ratio of alkyl (meth) acrylate to (meth) acrylic acid is preferably about (alkyl) (meth) acrylate: (meth) acrylic acid = 100: 0.5-2. As alkyl (meth) acrylate, methyl (meth) acrylate, butyl (meth) acrylate, (meth) acrylic acid-2-ethylhexyl or (meth) acrylic acid-2-hydroxyethyl are used alone or in combination. Used. As (meth) acrylic acid, acrylic acid is particularly used.

  At least one of the polymer particles (S1) and (S2) is obtained by emulsion polymerization of a polymerizable monomer containing alkyl (meth) acrylate, (meth) acrylic acid and styrene. Typically, the polymer particles (S1) are obtained by emulsion polymerization of a polymerizable monomer containing alkyl (meth) acrylate and (meth) acrylic acid and not containing styrene, A case where the polymer particles (S2) are obtained by emulsion polymerization of a polymerizable monomer containing alkyl (meth) acrylate, (meth) acrylic acid and styrene (hereinafter, representative examples thereof are mainly used). I will explain it according to.) It is preferable to use about 30 to 70 parts by mass of styrene with respect to 100 parts by mass of alkyl (meth) acrylate. Due to the synergistic action of polymer particles (S2) obtained by emulsion polymerization of styrene with alkyl (meth) acrylate and (meth) acrylic acid, and melamine cyanurate (B), the property of excellent flame retardancy is obtained. . In addition, polymer particles (S1) obtained by emulsion polymerization of alkyl (meth) acrylate and (meth) acrylic acid without containing styrene impart softness to the airbag fabric.

  As the polymerizable monomer, those other than alkyl (meth) acrylate, (meth) acrylic acid and styrene may be added and used. Specifically, ethylene, propylene, isobutylene, vinyl chloride, vinyl fluoride, vinylidene chloride, vinylidene fluoride, vinyl formate, vinyl acetate, vinyl propionate, vinyl vertic acid, (meth) acrylamide, N-methylolacrylamide, N , N-dimethylacrylamide, acrylamide-2-methylpropanesulfonic acid or an alkali metal salt thereof, N-vinylpyrrolidone, butadiene, isoprene or chloroprene may be added in a slight amount.

  As the emulsifier used in emulsion polymerization of the polymerizable monomer, a conventionally known surfactant for emulsion polymerization, that is, an anionic surfactant or a nonionic surfactant is used. Anionic surfactants include alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkyl benzene sulfonates, alkyl naphthalene sulfonates, alkyl sulfosuccinates, alkyl diphenyl ether disulfonates, naphthalene sulfonate formalin condensates, Polyoxyethylene polycyclic phenyl ether sulfate or polyoxyethylene distyrenated phenyl ether sulfate is used. As the nonionic surfactant, polyoxyalkylene alkyl ether, polyoxyethylene polycyclic phenyl ether, polyoxyethylene distyrenated phenyl ether, polyoxyethylene alkylphenyl ether, or the like is used. Among these, in particular, when a reactive emulsifier is used, since the free emulsifier does not remain in the aqueous resin emulsion (A), there is less risk of adverse effects in using the aqueous resin composition. Examples of the anionic reactive surfactant include Aqualon KH-05 and KH-10 manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Adeka Soap SR-10 and SR-20 manufactured by Adeka Co., Ltd., Latemul PD- manufactured by Kao Co., Ltd. 104 etc. are mentioned. Examples of the nonionic reactive surfactant include Adeka Soap ER-10 and ER-20 manufactured by Asahi Denka Kogyo Co., Ltd., Latemul PD-420 and PD-430 manufactured by Kao Corporation.

  Polymer particles (S1) and (S2) are obtained by emulsion polymerization of the polymerizable monomer in the presence of the above-described emulsifier. As for the usage-amount of an emulsifier, about 1-10 mass parts is preferable with respect to 100 mass parts of polymerizable monomers. When emulsion polymerization is performed, a protective colloid such as a cationic surfactant or polyvinyl alcohol may be added together with the emulsifier as long as the performance of the emulsion is not impaired. In addition, when emulsion polymerization is performed, a polymerization regulator such as isopropanol or mercaptans, a metal salt, an organic acid, a plasticizer, or the like may be added as appropriate.

  As a polymerization initiator used for emulsion polymerization, for example, a water-soluble radical polymerization catalyst, an oil-soluble radical polymerization catalyst, or a redox polymerization catalyst can be appropriately selected and used. Examples of the water-soluble radical polymerization catalyst include persulfates such as potassium persulfate (KPS) and ammonium persulfate (APS). Examples of the oil-soluble radical polymerization catalyst include azo compounds such as azobisisobutyronitrile, persulfates such as benzoyl peroxide, and the like. As a redox polymerization catalyst, a combination of an oxidizing agent such as hydrogen peroxide, cumene hydroperoxide, t-butyl peroxide or persulfate and a reducing agent such as glucose, dextrose, sodium formaldehyde sulfoxylate or sodium bisulfite Is mentioned. As for the usage-amount of a polymerization initiator, about 0.01-0.5 mass part is preferable with respect to 100 mass parts of polymerizable monomers to be used.

  An emulsion containing the polymer particles (S1) obtained by emulsion polymerization and an emulsion containing the polymer particles (S2) obtained by emulsion polymerization are mixed to produce polymer particles (S1) and polymer particles (S2). An aqueous resin emulsion (A) containing) may be obtained. Further, in the emulsion containing the polymer particles (S1) obtained by emulsion polymerization, further emulsion polymerization is performed to obtain polymer particles (S2), and the polymer particles (S1) and the polymer particles (S2) are contained. An aqueous resin emulsion (A) may be obtained. The mass ratio of the polymer particles (S1) and the polymer particles (S2) is preferably S1: S2 = 20-50: 80-50 (mass%). When the mass ratio of the polymer particles (S1) is less than 20% by mass, the softness of the airbag base fabric tends to decrease. Moreover, when the mass ratio of the polymer particles (S2) is less than 50% by mass, the flame retardancy of the airbag fabric tends to decrease.

  In the present invention, the glass transition temperature of the polymer particles (S1) is −70 ° C. to −10 ° C., and the glass transition temperature of the polymer particles (S2) is 0 to 30 ° C. The polymer particles (S1) have a glass transition temperature of −70 ° C. to −10 ° C. and give softness to the airbag fabric. On the other hand, the polymer particles (S2) can realize excellent flame retardancy by a synergistic action with the melamine cyanurate (B). In addition, when the glass transition temperature of the polymer particles (S2) exceeds 30 ° C., the texture of the airbag fabric tends to be hard. The glass transition temperature is measured by a differential scanning calorimeter (DSC) at a rate of temperature increase of 20 ° C./min. As the differential scanning calorimeter, for example, Q2000 (manufactured by TA Instruments) can be used.

  Melamine cyanurate (B) is added and blended with the aqueous resin emulsion (A) containing the polymer particles (S1) and (S2) to obtain the aqueous resin composition used in the present invention. The amount of melamine cyanurate (B) added is preferably about 5 to 40 parts by mass with respect to 100 parts by mass (in terms of solid content) of the polymer particles (S1) and (S2). When the content of melamine cyanurate (B) is less than 5 parts by mass, the flame retardancy of the airbag fabric tends to decrease. When the content of the melamine cyanurate (B) exceeds 40 parts by mass, the amount of the polymer particles (S1) and (S2) is relatively reduced, and the non-breathability or opening as a base fabric for an air bag, etc. The required performance tends to decrease.

  In order to further improve the durability of the airbag fabric, a crosslinking agent (C) may be further added and blended in the aqueous resin composition. As the crosslinking agent (C), conventionally known ones are used, and a carbodiimide compound having two or more carbodiimide groups is particularly preferable. As the carbodiimide compound, a polycarbodiimide resin is most preferable. Moreover, when adding and mix | blending a crosslinking agent (C), content of the crosslinking agent (C) in an aqueous resin composition is 100 mass parts (solid content conversion) of polymer particle (S1) and (S2) in total. On the other hand, it is preferable that it is about 1-15 mass parts (solid content conversion) grade. There exists a tendency for the durability improvement effect of the base fabric for airbags to be small in content of a crosslinking agent (C) being less than 1 mass part. Moreover, when content of a crosslinking agent (C) exceeds 15 mass parts, the tendency for the softness of the base fabric for airbags to fall will arise.

  In order to adjust the viscosity of the aqueous resin composition, a thickener may be further added to the aqueous resin composition. As the thickener, a conventionally known one is used, and a urethane associative thickener is particularly preferable. The optimum range of the viscosity of the aqueous resin composition can be selected according to the coating method and the like, and it is particularly preferably 1 to 100 Pa · s (25 ° C.). When the viscosity is lower than 1 Pa · s, the penetration of the resin into the fabric increases, the resulting base fabric tends to be hard, and the thickness of the resin coating formed on the surface of the base fabric is difficult to be constant. When the viscosity exceeds 100 Pa · s, the handleability during application tends to be poor.

The airbag fabric according to the present invention is obtained by applying the aqueous resin composition described above to a fabric and drying and solidifying the fabric. As the fabric, conventionally known materials are used, and it is particularly preferable to use a woven fabric. Any woven structure can be adopted as the woven structure, but a plain woven structure is generally preferable. In addition, the woven fabric is preferably dense, and the cover factor (CF) is preferably 750 or more, and most preferably 800 or more. When the cover factor (CF) is less than 750, the non-breathability of the airbag base fabric tends to decrease. The cover factor (CF) is calculated by the following formula.
CF = Nw × (Dw) ^1/2 + Nf × (Df) ^1/2
[Where Nw is the warp density (lines / cm), Nf is the weft density (lines / cm), Dw is the warp fineness (dtex), and Df is the weft fineness (dtex). ]

  Synthetic fiber multifilament yarn is used as the warp and weft. Specifically, nylon multifilament yarn is preferably used, and nylon 66 multifilament yarn is most preferably used. The fineness of the warp and weft is preferably 200 to 1000 dtex, particularly preferably 250 to 700 dtex.

As a method for applying the aqueous resin composition to the dough, a conventionally known method is used. Specifically, the coating method is preferable, and the knife coating method is particularly preferable. The coating amount on the dough is preferably 5 to 30 g / m ² , and most preferably 10 to 25 g / m ² in terms of solid content of the aqueous resin composition. When the coating amount is less than 5 g / m ² , the non-breathability of the airbag base fabric tends to decrease. On the other hand, when the coating amount exceeds 30 g / m ² , since the airbag fabric becomes heavy, there is a tendency to lack practicality. Drying and solidification after coating can also be performed by a conventionally known method, and it is generally performed at a temperature of 100 ° C. or higher, which is the evaporation temperature of water. Moreover, when a crosslinking agent is contained in the aqueous resin composition, it is preferable to heat-treat at a temperature higher than the temperature at which the crosslinking reaction occurs after drying.

  The airbag fabric according to the present invention is sewn into a bag shape by a conventionally known method, and is attached to a predetermined portion of an automobile or the like by a conventionally known method to form an airbag. Such an airbag is generally mounted on an automobile, but can be used for other uses such as bicycles and airplanes in addition to automobiles.

  The base fabric for airbags according to the present invention is obtained by applying polymer particles (S1), polymer particles (S2), and melamine cyanurate (B) to a fabric. Therefore, there is an effect that excellent flame retardancy can be realized by the synergistic action of the polymer particles (S2) obtained by copolymerizing styrene and the melamine cyanurate (B). In addition, the polymer particles (S1) produce an effect that the softness of the airbag fabric can be realized.

[Production Example 1 of emulsion (S1-E1) containing polymer particles (S1)]
A flask equipped with a stirrer was charged with 130 parts by mass of deionized water and 15 parts by mass of ADEKA rear soap SR-10 (manufactured by Adeka) and stirred to obtain an aqueous emulsifier solution. In this emulsion, 226 parts by mass of 2-ethylhexyl acrylate, 236 parts by mass of n-butyl methacrylate, 4.8 parts by mass of acrylic acid and 4.8 parts by mass of 2-hydroxyethyl methacrylate are gradually added to emulsify containing a polymerizable monomer. I got a thing.
260 parts by mass of deionized water was charged into another condenser and flask equipped with a stirrer. After setting the temperature in the kettle to 55 ° C. and adding 2 parts by mass of potassium persulfate, the emulsion containing the polymerizable monomer was mixed with 6.4 parts by mass of an aqueous sodium hydrogen sulfite solution having a concentration of 10% by mass with nitrogen. The mixture was added dropwise with stirring in a gas stream over 120 minutes. After dropping, aging was performed for 90 minutes while further adding 3.4 parts by mass of a 10% by mass aqueous sodium hydrogen sulfite solution. Thereafter, the mixture is cooled, adjusted to pH 7 with ammonia water having a concentration of 28% by mass, further adjusted to solid content 50% with deionized water, and emulsion (S1-) containing copolymer particles (S1). E1) was obtained. In addition, the glass transition temperature of the obtained copolymer particle (S1) was -34 degreeC.

[Production Example 2 of emulsion (S1-E2) containing polymer particles (S1)]
Except for using 349 parts by mass of 2-ethylhexyl acrylate, 112 parts by mass of n-butyl methacrylate, 4.8 parts by mass of acrylic acid and 4.8 parts by mass of 2-hydroxyethyl methacrylate as the polymerizable monomer, By the same method, an emulsion (S1-E2) having a solid content of 50% by mass containing the copolymer particles (S1) was obtained. In addition, the glass transition temperature of the obtained copolymer particle (S1) was -49 degreeC.

[Production Example 3 of emulsion (S1-E3) containing polymer particles (S1)]
Except for using 172 parts by weight of 2-ethylhexyl acrylate, 290 parts by weight of n-butyl methacrylate, 4.8 parts by weight of acrylic acid and 4.8 parts by weight of 2-hydroxyethyl methacrylate as the polymerizable monomer, By the same method, an emulsion (S1-E3) having a solid content of 50% by mass containing the copolymer particles (S1) was obtained. In addition, the glass transition temperature of the obtained copolymer particle (S1) was -19 degreeC.

[Production Example 4 of emulsion (S2-E1) containing polymer particles (S2)]
A flask equipped with a stirrer was charged with 260 parts by mass of deionized water, 1.2 parts by mass of NAROACTY CL-200 (manufactured by Sanyo Chemical Co., Ltd.), and 6 parts by mass of Haitenol NF08 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.). Thus, an aqueous emulsifier solution was obtained. Into this, 265 parts by mass of styrene, 311 parts by mass of butyl acrylate, 12 parts by mass of 2-hydroxyethyl methacrylate, and 3 parts by mass of acrylic acid were gradually added to obtain an emulsion containing a polymerizable monomer.
200 parts by mass of deionized water was charged into another condenser and a flask equipped with a stirrer, and the temperature in the kettle was set to 75 ° C. After adding 2 parts of potassium persulfate, the polymerizable monomer emulsion (M′-1) was added dropwise in a nitrogen gas stream over 150 minutes with stirring with 6 parts of a 10% aqueous solution of NaHSO ₃ . After the dropwise addition, aging was performed for 90 minutes while 6 parts of a 10% aqueous solution of NaHSO ₃ was further added dropwise. Thereafter, the mixture is cooled, the pH is adjusted to 7 with 28% ammonia water, the solid content is adjusted to 50% with deionized water, and an aqueous resin emulsion (S2-A) containing copolymer particles (S2) is prepared. ) In addition, the glass transition temperature of the obtained copolymer particle (S2) was 16 degreeC.

[Production Example 5 of emulsion (S2-E2) containing polymer particles (S2)]
In the same manner as in Production Example 4 except that 201 parts by mass of styrene, 375 parts by mass of butyl acrylate, 12 parts by mass of 2-hydroxyethyl methacrylate, and 3 parts by mass of acrylic acid are used as the polymerizable monomer. An emulsion (S2-E2) containing 50% by mass of solids containing coalesced particles (S2) was obtained. In addition, the glass transition temperature of the obtained copolymer particle (S2) was 0 degreeC.

[Production Example 6 of emulsion (S2-E3) containing polymer particles (S2)]
In the same manner as in Production Example 4 except that 343 parts by mass of styrene, 233 parts by mass of butyl acrylate, 12 parts by mass of 2-hydroxyethyl methacrylate, and 3 parts by mass of acrylic acid are used as the polymerizable monomer. An emulsion (S2-E3) containing a coalescent particle (S2) having a solid content of 50% by mass was obtained. In addition, the glass transition temperature of the obtained copolymer particle (S2) was 39 degreeC.

[Preparation of woven fabric]
A 470 dtex / 72f nylon 66 multifilament yarn was used as the warp and weft, and after weaving in a plain weave structure, scouring and set processing were performed to obtain a woven fabric having a warp density and a weft density of 18 yarns / cm. The fabric weight was 176 g / m ² and the cover factor was 785.

Example 1
40 parts by mass of the emulsion (S1-E1) obtained in Production Example 1 and 60 parts by mass of the emulsion (S2-E1) obtained in Production Example 4 were mixed, and a thickener ("Adecan" manufactured by Adeka Corporation) was further mixed. UH450VF ") 0.35 parts by mass and mixing to prepare an aqueous resin emulsion, melamine cyanurate (B) (" MC-6000 "manufactured by Nissan Chemical Industries, Ltd.) 10 parts by mass and polycarbodiimide (C) ( An aqueous resin composition was obtained by adding and blending 5.4 parts by mass of “Carbodilite SV-02” manufactured by Nisshinbo Chemical Co., Ltd., nonvolatile content of 40% by mass). This aqueous resin composition was applied to the woven fabric by a doctor knife coating method so that the solid content of the aqueous resin composition was 15 g / m ² . Then, it dried at 100 degreeC and subsequently heat-processed at 180 degreeC for 90 second, and obtained the base fabric for airbags. The basis weight of the airbag fabric was 191 g / m ² .

Example 2
An airbag base fabric was obtained in the same manner as in Example 1 except that the amount of melamine cyanurate (B) added was changed to 5 parts by mass.

Example 3
An airbag base fabric was obtained in the same manner as in Example 1, except that the addition amount of melamine cyanurate (B) was changed to 20 parts by mass.

Example 4
Except for preparing an aqueous resin emulsion by mixing 10 parts by mass of the emulsion (S1-E1) obtained in Production Example 1 above and 90 parts by mass of the emulsion (S2-E1) obtained in Production Example 4 above, Example In the same manner as in No. 1, an airbag base fabric was obtained.

Example 5
Examples are the same except that 20 parts by mass of the emulsion (S1-E1) obtained in Production Example 1 and 80 parts by mass of the emulsion (S2-E1) obtained in Production Example 4 are mixed to prepare an aqueous resin emulsion. In the same manner as in No. 1, an airbag base fabric was obtained.

Example 6
Example 5 A mixture of 50 parts by mass of the emulsion (S1-E1) obtained in Production Example 1 and 50 parts by mass of the emulsion (S2-E1) obtained in Production Example 4 was used to prepare an aqueous resin emulsion. In the same manner as in No. 1, an airbag base fabric was obtained.

Example 7
Except that 40 parts by mass of the emulsion (S1-E2) obtained in Production Example 2 and 60 parts by mass of the emulsion (S2-E1) obtained in Production Example 4 were mixed to prepare an aqueous resin emulsion, Example In the same manner as in No. 1, an airbag base fabric was obtained.

Example 8
Except that 40 parts by mass of the emulsion (S1-E3) obtained in Production Example 3 and 60 parts by mass of the emulsion (S2-E1) obtained in Production Example 4 were mixed to prepare an aqueous resin emulsion, Example In the same manner as in No. 1, an airbag base fabric was obtained.

Example 9
Except that 40 parts by mass of the emulsion (S1-E1) obtained in Production Example 1 and 60 parts by mass of the emulsion (S2-E2) obtained in Production Example 5 were mixed to prepare an aqueous resin emulsion, Example In the same manner as in No. 1, an airbag base fabric was obtained.

Example 10
An airbag base fabric was obtained in the same manner as in Example 1 except that no polycarbodiimide was added and blended.

Example 11
An airbag base fabric was obtained in the same manner as in Example 2 except that no polycarbodiimide was added and blended.

Comparative Example 1
An airbag base fabric was obtained in the same manner as in Example 1 except that melamine cyanurate (B) was not added and blended.

Comparative Example 2
Except for using the aqueous resin emulsion consisting of 100 parts by mass of the emulsion (S2-E1) obtained in Production Example 4 without blending the emulsion (S1-E1) obtained in Production Example 1, Example 1 and An airbag base fabric was obtained by the same method.

Comparative Example 3
Example 1 is the same as Example 1 except that the emulsion (S2-E1) obtained in Production Example 4 is not used and the aqueous resin emulsion consisting of 100 parts by mass of the emulsion (S1-E1) obtained in Production Example 1 is used. An airbag base fabric was obtained by the same method.

Comparative Example 4
Except that 40 parts by mass of the emulsion (S1-E1) obtained in Production Example 1 and 60 parts by mass of the emulsion (S2-E3) obtained in Production Example 6 were mixed to prepare an aqueous resin emulsion, Example In the same manner as in No. 1, an airbag base fabric was obtained.

The following tests were conducted on the airbag fabrics obtained in the examples and comparative examples. The results are shown in Table 1.
[Burning rate (mm / min)]
Test pieces of the shape defined in FMVSS-302 are collected from the air bag base fabric immediately after manufacture and the air bag base fabric left at 100 ° C. for 150 hours after manufacture, respectively in the warp direction and the weft direction of the test piece. The combustion test was performed three times, and the maximum value of the obtained combustion rate was defined as the combustion rate (mm / min). In the combustion test, those with a combustion distance within 50 mm and a combustion time within 60 seconds were evaluated as “self-extinguishing”.
[Texture (softness sensuality)]
A 25 cm × 25 cm test piece was collected from an airbag base fabric that was allowed to stand at 100 ° C. for 150 hours after production, and the softness of the base fabric was evaluated by a sensory test using fingers. The standard of softness was based on a conventional airbag base fabric coated with a silicone resin that has been evaluated as soft, and the softness was evaluated in the following three stages in comparison with this.
○ ... Same or softer than the standard one.
Δ: Slightly harder than the standard.
X: Harder than the standard one.

[Table 1]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Combustion rate (mm / min) Feel (softness sensation)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Example 1 Self-extinguishing ○
Example 2 0 ○
Example 3 0 ○
Example 4 0
Example 5 Self-extinguishing property ○
Example 6 Self-extinguishing property ○
Example 7 0 ○
Example 8 Self-extinguishing property
Example 9 Self-extinguishing property ○
Example 10 0 ○
Example 11 Self-extinguishing property ○
Comparative Example 1 199 ×
Comparative Example 2 Self-extinguishing property ×
Comparative Example 3 193 ○
Comparative Example 4 0 ×
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  As is apparent from Table 1, it can be seen that Comparative Example 1 in which melamine cyanurate (B) is not added and Comparative Example 3 in which polymer particles (S2) are not added are inferior in flame retardancy compared to Examples. . Moreover, it turns out that the comparative example 2 which does not mix | blend polymer particle | grains (S1) is inferior in a texture compared with an Example. Moreover, it turns out that the comparative example 4 which mix | blended the polymer particle | grains whose glass transition temperature exceeds 30 degreeC is also inferior to a texture compared with an Example. In addition, about the opening and the air permeability, the thing of an Example and the comparative example did not have a big difference.

Claims (9)

Aqueous resin emulsion (A) containing polymer particles (S1) and (S2) obtained by emulsion polymerization of a polymerizable monomer containing alkyl (meth) acrylate and (meth) acrylic acid in the presence of an emulsifier And an aqueous resin composition containing melamine cyanurate (B) applied to the fabric and dried and solidified,
At least one of the polymer particles (S1) and (S2) is obtained by emulsion polymerization of a polymer monomer containing alkyl (meth) acrylate, (meth) acrylic acid and styrene,
The glass transition temperature of the polymer particles (S1) is −70 ° C. to −10 ° C., and the glass transition temperature of the polymer particles (S2) is 0 to 30 ° C. .   The polymer particles (S1) are obtained by emulsion polymerization of alkyl (meth) acrylate and (meth) acrylic acid, and the polymer particles (S2) are alkyl (meth) acrylate, (meth) The airbag fabric according to claim 1, wherein the airbag fabric is obtained by emulsion polymerization of acrylic acid and styrene.   A compound selected from the group consisting of methyl (meth) acrylate, butyl (meth) acrylate, (meth) acrylate-2-ethylhexyl and (meth) acrylate-2-hydroxyethyl as alkyl (meth) acrylate The base fabric for airbags of Claim 1 or 2 which uses this.   The air according to any one of claims 1 to 3, wherein a mass ratio of the polymer particles (S1) to the polymer particles (S2) is S1: S2 = 20 to 50:80 to 50 (mass%). Base fabric for bags.   The melamine cyanurate (B) is contained in an amount of 5 to 40 parts by mass with respect to 100 parts by mass (in terms of solid content) of the polymer particles (S1) and the polymer particles (S2). The airbag fabric according to any one of the preceding claims.   The base fabric for airbags as described in any one of Claims 1 thru | or 5 in which the crosslinking agent (C) is contained in the aqueous resin composition.   The airbag fabric according to any one of claims 1 to 6, wherein the crosslinking agent (C) is a carbodiimide compound having two or more carbodiimide groups. Aqueous resin emulsion (A) containing polymer particles (S1) and (S2) obtained by emulsion polymerization of a polymerizable monomer containing alkyl (meth) acrylate and (meth) acrylic acid in the presence of an emulsifier And an aqueous resin composition used for producing an airbag base fabric containing melamine cyanurate (B),
At least one of the polymer particles (S1) and (S2) is obtained by emulsion polymerization of a polymer monomer containing alkyl (meth) acrylate, (meth) acrylic acid and styrene,
The glass transition temperature of the polymer particles (S1) is −70 ° C. to −10 ° C., and the glass transition temperature of the polymer particles (S2) is 0 to 30 ° C. An aqueous resin composition used to produce   The airbag using the base fabric for airbags as described in any one of Claims 1 thru | or 7.