JP2012007058A - Liquid silicone rubber coating composition, curtain airbag, and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid silicone rubber coating composition excellent in adhesion to a base fabric for an air bag, a curtain airbag having a silicone rubber coating layer consisting of a cured product of the composition, and a method of manufacturing the curtain airbag.SOLUTION: The liquid silicone rubber coating composition includes: (A) an organopolysiloxane containing two or more silicon atom-bonded alkenyl groups in one molecule; (B) an organohydrogenpolysiloxane containing two or more silicon atom-bonded hydrogen atoms in one molecule; (C) an addition reaction catalyst; (E) an organosilicon compound of formula (1): (RO)Si-R-Si(OR)(wherein Ris a monovalent hydrocarbon group, and Ris a divalent hydrocarbon group which may contain a silicon atom); (F) an organosilicon compound having an epoxy group and a silicon atom-bonded alkoxy group in a molecule; and (G) a titanium compound and/or a zirconium compound.

Description

  The present invention is suitable for manufacturing an air bag of a vehicle or the like in which a silicone rubber coating film is formed on a fiber cloth such as 6,6-nylon, 6-nylon, and polyester, and is particularly mounted on a driver seat or a passenger seat. Unlike air bags that are used, curtain air bags that are housed along the roof side from the front pillar and are required to maintain a constant inflation time in order to protect the head and prevent popping out in the event of a collision or vehicle fall The present invention relates to a liquid silicone rubber coating agent composition suitable for production, a curtain airbag having a silicone rubber coating layer comprising a cured product of the composition, and a method for producing the curtain airbag.

Conventionally, the following are known as a silicone rubber composition for an air bag for the purpose of forming a rubber coating on the fiber surface. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 5-214295) discloses an adhesive property to a base fabric formed by adding an inorganic filler, an organopolysiloxane resin, and an epoxy group-containing organosilicon compound to an addition-curable composition. A liquid silicone rubber coating composition for air bags that is excellent in air quality is disclosed. Patent Document 2 (Japanese Patent Application Laid-Open No. 2002-138249) discloses a short-time heating in which an inorganic filler, an organopolysiloxane resin, an organic titanium compound, and an alkyl silicate or an alkyl polysilicate are added to an addition-curable composition. A liquid silicone rubber coating composition for an air bag that exhibits excellent adhesion to a base fabric upon curing is disclosed. Patent Document 3 (Japanese Patent Laid-Open No. 2001-287610) discloses a silicone rubber coating composition for an air bag excellent in thin film coatability in which the viscosity of a vinyl group-containing organopolysiloxane is limited to 8,000 centipoise or less. Yes. Patent Document 4 (Japanese Patent Application Laid-Open No. 2001-59052) is obtained by adding wet silica having an average specific surface area of 150 to 250 m ² / g and an average particle diameter of 20 μm or less by a BET method to a rubber coating composition. A liquid silicone rubber composition for coating used in the production of a silicone rubber coated base fabric with reduced stickiness is disclosed.

  However, these compositions, when used for curtain airbag applications, are all poor in adhesion to the airbag fabric, so that the inflation time can be satisfactorily maintained by suppressing leakage of the inflator gas. There wasn't.

JP-A-5-214295 JP 2002-138249 A JP 2001-287610 A JP 2001-59052 A

  The present invention has been made in view of the above circumstances, and in particular, when used for curtain airbag applications, a liquid silicone rubber coating composition having excellent adhesion to a base fabric for airbags, An object of the present invention is to provide a curtain airbag having a silicone rubber coating layer made of a cured product of the composition on at least one surface, and a method for producing the curtain airbag.

As a result of intensive studies to achieve the above object, the present inventors have found that (A) an organopolysiloxane containing two or more alkenyl groups bonded to a silicon atom in one molecule, and (B) one molecule. An organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms, (C) an addition reaction catalyst, (E) bonded to a silicon atom forming a non-siloxane structural unit represented by the following general formula (1) An organosilicon compound having an organooxy group, (F) one or both of an organosilicon compound having an epoxy group and a silicon atom-bonded alkoxy group in one molecule, and (G) a titanium compound and a zirconium compound, preferably further (D) a liquid silicone rubber coating composition comprising a finely powdered silica having a specific surface area of more than 50 m ² / g, Ca When used as a silicone rubber coating layer for ten airbags, it has been found that the coating layer has excellent adhesion to the airbag base fabric, so that leakage of the inflator gas can be suppressed and expansion of the curtain airbag can be maintained for a certain period of time. The present invention has been made.

Accordingly, the present invention provides the following liquid silicone rubber coating agent composition, curtain airbag and method for producing the same.
[Claim 1]
(A) Organopolysiloxane containing two or more alkenyl groups bonded to silicon atoms in one molecule: 100 parts by mass
(B) Organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms in one molecule:
The number of hydrogen atoms bonded to silicon atoms contained in this component is (A)
An amount of 1 to 10 per silicon-bonded alkenyl group in the minute,
(C) addition reaction catalyst: effective amount,
(D) Fine powder silica having a specific surface area of 50 m ² / g or more: 0 to 50 parts by mass,
(E) Organosilicon compound having an organooxy group bonded to a silicon atom forming a non-siloxane structural unit represented by the following general formula (1): 0.1 to 10 parts by mass
(R ¹ O) ₃ Si—R ² —Si (OR ¹ ) ₃ (1)
Wherein R ¹ is the same or different unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and R ² is an unsubstituted or substituted carbon atom having 2 carbon atoms which may contain a silicon atom. These are the above divalent hydrocarbon groups.)
(F) Organosilicon compound having an epoxy group and a silicon atom-bonded alkoxy group in one molecule: 0.1 to 10 parts by mass, and (G) any one or both of a titanium compound and a zirconium compound: 0.1 A liquid silicone rubber coating agent composition comprising 5 parts by mass.
[Claim 2]
(E) R ² of the formula (1) in the organosilicon compound having an organooxy group bonded to a silicon atom forming the non-siloxane structural unit of the component may have a diorganosilylene group and has ² to 20 carbon atoms. A linear, branched or cyclic alkylene group, or a divalent aromatic hydrocarbon group having 6 to 40 carbon atoms which contains 1 to 4 phenylene skeletons and may contain a diorganosilylene group. The liquid silicone rubber coating composition according to claim 1, wherein
[Claim 3]
The organosilicon compound having an organooxy group bonded to a silicon atom forming the non-siloxane structural unit of the component (E) is linear, and both ends of the molecular chain are blocked with trialkoxysilyl groups. The liquid silicone rubber coating composition according to claim 1 or 2.
[Claim 4]
The liquid silicone rubber coating composition according to any one of claims 1 to 3, wherein the component (G) is an organic titanium compound.
[Claim 5]
The liquid silicone rubber coating composition according to claim 4, wherein the organic titanium compound as component (G) is an organic titanate, an organic titanium chelate compound, or a combination thereof.
[Claim 6]
The liquid silicone rubber coating composition according to any one of claims 1 to 3, wherein the component (G) is an organic zirconium compound.
[Claim 7]
The liquid silicone rubber coating composition according to claim 6, wherein the organic zirconium compound as component (G) is an organic zirconium ester, an organic zirconium chelate compound, or a combination thereof.
[Claim 8]
The liquid silicone rubber coating composition according to any one of claims 1 to 7, which is used for a curtain airbag.
[Claim 9]
By applying the composition according to any one of claims 1 to 7 to at least one surface of a substrate made of a fiber cloth, and curing the composition, on at least one surface of the substrate, A method for producing a curtain airbag, comprising forming a silicone rubber coating layer comprising a cured product of the composition.
[Claim 10]
It has a base material consisting of a fiber cloth, and a silicone rubber coating layer consisting of a cured product of the composition according to any one of claims 1 to 7, wherein the silicone rubber coating layer is at least one of the base materials. Curtain airbag formed on the surface.

  ADVANTAGE OF THE INVENTION According to this invention, the liquid silicone rubber coating agent composition excellent in the adhesiveness with respect to the base fabric for airbags is obtained. A curtain airbag having a silicone rubber coating layer made of a cured product of the composition on at least one surface of the substrate can satisfactorily maintain the inflation time by suppressing leakage of the inflator gas.

  Hereinafter, the present invention will be described in more detail. In the present invention, the viscosity is a value measured with a rotational viscometer, and Me represents a methyl group.

<Liquid silicone rubber coating composition>
The liquid silicone rubber coating agent composition of the present invention comprises the following components (A) to (G) (however, the component (D) is an optional component), and means room temperature (25 ° C.). The same applies hereinafter) and is liquid. Hereinafter, each component will be described in detail.

[(A) component]
The organopolysiloxane of component (A) contains two or more alkenyl groups bonded to silicon atoms in one molecule and is a base polymer of the composition of the present invention. The (A) component organopolysiloxane may be used alone or in combination of two or more.

  Examples of the molecular structure of the component (A) include linear, cyclic, branched, and three-dimensional network structures. The main chain basically consists of repeating diorganosiloxane units, It is preferably a linear diorganopolysiloxane having a terminal end blocked with a triorganosiloxy group (these organo groups may also include alkenyl groups). In addition, when the molecular structure of the organopolysiloxane of component (A) is linear or branched, the position of the silicon atom to which the alkenyl group is bonded in the molecule of the organopolysiloxane is the molecular chain terminal and molecular chain Either one of them may be used on the way (non-terminal molecular chain). Particularly preferably, the component (A) is a linear diorganopolysiloxane containing alkenyl groups bonded to silicon atoms at both ends of the molecular chain.

  Examples of the alkenyl group bonded to the silicon atom in the component (A) include those having the same or different unsubstituted or substituted, usually 2 to 8 carbon atoms, preferably 2 to 4 carbon atoms. Specific examples thereof include a vinyl group, an allyl group, a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a cyclohexenyl group, a heptenyl group, and the like, and a vinyl group is particularly preferable.

  (A) Content of the alkenyl group couple | bonded with the silicon atom in a component is 0.001 with respect to the whole monovalent organic group (namely, unsubstituted or substituted monovalent hydrocarbon group) couple | bonded with the silicon atom. It is preferably 10 mol%, particularly preferably about 0.01 to 5 mol%.

  (A) As monovalent organic group couple | bonded with silicon atoms other than the alkenyl group of a component, it is C1-C12 normally, preferably C1-C12 of the same or different unsubstituted or substituted mutually. About a monovalent hydrocarbon group. When the monovalent hydrocarbon group is substituted, examples thereof include halogen-substituted ones. Specific examples of the organic group include alkyl groups such as methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, cyclohexyl group, heptyl group; phenyl group, tolyl group, xylyl group, naphthyl group, etc. Aryl groups; aralkyl groups such as benzyl group and phenethyl group; halogenated alkyl groups such as chloromethyl group, 3-chloropropyl group and 3,3,3-trifluoropropyl group, etc. It is preferably a group.

  The viscosity of component (A) at 25 ° C. is preferably in the range of 100 to 500,000 mPa · s, particularly preferably in the range of 300 to 100,000 mPa · s. When the viscosity is within this range, the workability of the resulting composition is good, and the physical properties of the resulting silicone rubber are good.

Preferable examples of the component (A) include organopolysiloxanes represented by the following average composition formula (2).
R _a SiO _{(4-a) / 2} (2)
(Wherein R is the same or different unsubstituted or substituted monovalent hydrocarbon group having 1 to 10, preferably 1 to 8 carbon atoms, and a is 1.5 to 2.8, preferably 1.8 to 2.5, more preferably a positive number in the range of 1.95 to 2.05, provided that 0.001 to 10 mol%, preferably 0.01 to 5 mol% of the total R is alkenyl. Group.)

  Specific examples of R include alkenyl groups specifically mentioned above as alkenyl groups bonded to silicon atoms in component (A), and organic groups bonded to silicon atoms other than alkenyl groups in component (A) above. And organic groups specifically mentioned in the above.

Specific examples of the organopolysiloxane of component (A) include: a trimethylsiloxy group-capped dimethylsiloxane / methylvinylsiloxane copolymer with both ends of a molecular chain, a trimethylsiloxy group-capped methylvinylpolysiloxane with a molecular chain at both ends, and a trimethylsiloxy group with both ends of a molecular chain. Siloxy group-blocked dimethylsiloxane / methylvinylsiloxane / methylphenylsiloxane copolymer, dimethylvinylsiloxy group-blocked dimethylpolysiloxane at both ends of the molecular chain, dimethylvinylsiloxy group-blocked methylvinylpolysiloxane at both ends of the molecular chain, dimethylvinyl at both ends of the molecular chain Siloxy group-blocked dimethylsiloxane / methylvinylsiloxane copolymer, dimethylvinylsiloxy group-blocked dimethylsiloxane / methylvinylsiloxane / methylphenylsiloxane copolymer, molecular chain Terminal divinylmethylsiloxy group-blocked dimethylpolysiloxane, molecular chain both ends divinylmethylsiloxy group-blocked dimethylsiloxane / methylvinylsiloxane copolymer, molecular chain both ends trivinylsiloxy group-blocked dimethylpolysiloxane, molecular chain both ends trivinylsiloxy group dimethylsiloxane-methylvinylsiloxane copolymer, wherein: 'siloxane units represented by the formula ₃ SiO _0.5: R' R siloxane units represented by the formula ₂ R''SiO _0.5: R 'siloxane represented by ₂ SiO units and formula organosiloxane copolymers consisting of siloxane units represented by SiO _2, wherein: 'siloxane units represented by the formula ₃ SiO _0.5: R' R siloxane units represented by the formula ₂ R''SiO _0.5 : Organosiloxane copolymer comprising siloxane units represented by SiO ₂ , formula : R 'siloxane units represented by the formula ₂ R''SiO _0.5: R' siloxane units represented by the formula ₂ SiO: organosiloxane copolymers consisting of siloxane units represented by SiO _2, wherein: R'R An organosiloxane copolymer comprising a siloxane unit represented by ″ SiO and a siloxane unit represented by the formula: R′SiO _1.5 or a siloxane unit represented by the formula: R ″ SiO _1.5 , and 2 of these organopolysiloxanes The mixture which consists of seed | species or more is mentioned.

  R ′ in the above formula is the same or different unsubstituted or substituted monovalent hydrocarbon group other than an alkenyl group, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group. Alkyl groups such as cyclohexyl group and heptyl group; aryl groups such as phenyl group, tolyl group, xylyl group and naphthyl group; aralkyl groups such as benzyl group and phenethyl group; chloromethyl group, 3-chloropropyl group, 3, 3 And halogenated alkyl groups such as 3-trifluoropropyl group. In addition, R ″ in the above formula is an alkenyl group, and examples thereof include a vinyl group, an allyl group, a butenyl group, a pentenyl group, a hexenyl group, and a heptenyl group.

[Component (B)]
The (B) component organohydrogenpolysiloxane reacts with the (A) component and acts as a cross-linking agent, and there is no particular limitation on its molecular structure, for example, linear, cyclic, branched, which has been conventionally produced. Atoms, three-dimensional networks (resin-like) and the like can be used, but hydrogen atoms (hydrosilyl group represented by SiH) bonded to at least 2, preferably 3 or more silicon atoms in one molecule And has substantially no hydroxyl group bonded to a silicon atom (that is, silanol group) in the molecule, usually 2 to 300, preferably 3 to 200, more preferably 4 It is desirable to have about 100 SiH groups. The (B) component organohydrogenpolysiloxane may be used alone or in combination of two or more.

As this organohydrogenpolysiloxane, those represented by the following average composition formula (3) can be used.
R ⁴ _b H _c SiO _{(4-bc) / 2} (3)

In the above formula (3), R ⁴ is an unsubstituted or substituted monovalent hydrocarbon group bonded to a silicon atom, preferably having the same or different aliphatic unsaturated bond, preferably having 1 to 10 carbon atoms, Examples of the unsubstituted or substituted monovalent hydrocarbon group in R ⁴ include, for example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, neopentyl group, and hexyl group. Alkyl groups such as cyclohexyl group, octyl group, nonyl group, decyl group, aryl groups such as phenyl group, tolyl group, xylyl group, naphthyl group, aralkyl groups such as benzyl group, phenylethyl group, phenylpropyl group, etc. In which some or all of the hydrogen atoms in the group are substituted with halogen atoms such as fluorine, bromine, chlorine, etc., such as chloromethyl, chloropropyl, A lomoethyl group, a trifluoropropyl group, etc. are mentioned. The unsubstituted or substituted monovalent hydrocarbon group for R ⁴ is preferably an alkyl group or an aryl group, and more preferably a methyl group or a phenyl group. B is 0.7 to 2.1, c is 0.001 to 1.0, and b + c is a positive number satisfying 0.8 to 3.0. Preferably, b is 1.0 to 1.0. 2.0 and c are 0.01 to 1.0, and b + c is 1.5 to 2.5.

  SiH groups containing at least 2 (usually 2 to 300), preferably 3 or more (for example, 3 to 200), more preferably about 4 to 100 in one molecule are represented by molecular chain terminal, molecular chain It may be located anywhere in the middle, or may be located in both. The molecular structure of the organohydrogenpolysiloxane may be any of linear, cyclic, branched, and three-dimensional network structures, but the number of silicon atoms in one molecule (or the degree of polymerization) is Usually 2 to 300, preferably 3 to 150, more preferably about 4 to 100 are desirable, and the viscosity at 25 ° C. is usually 0.1 to 1,000 mPa · s, preferably 0.5 to 500 mPa. -About s, a liquid thing is used at room temperature (25 degreeC). The polymerization degree is a polystyrene-equivalent number average polymerization degree in GPC (gel permeation chromatography) analysis.

Examples of the component (B) organohydrogenpolysiloxane include 1,1,3,3-tetramethyldisiloxane, 1,3,5,7-tetramethylcyclotetrasiloxane, and tris (hydrogendimethylsiloxy). Methylsilane, tris (hydrogendimethylsiloxy) phenylsilane, methylhydrogencyclopolysiloxane, methylhydrogensiloxane-dimethylsiloxane cyclic copolymer, trimethylsiloxy group-blocked methylhydrogenpolysiloxane, molecular chain both-end trimethyl Siloxy group-blocked dimethylsiloxane / methylhydrogensiloxane copolymer, trimethylsiloxy group-blocked dimethylsiloxane / methylhydrogensiloxane / methylphenylsiloxane copolymer at both ends of the molecular chain Molecular chain both ends trimethylsiloxy group-blocked dimethylsiloxane / methylhydrogensiloxane / diphenylsiloxane copolymer, molecular chain both ends dimethylhydrogensiloxy group-blocked methylhydrogenpolysiloxane, molecular chain both ends dimethylhydrogensiloxy group-blocked dimethylpoly Siloxane, dimethylhydrogensiloxy group-capped dimethylsiloxane / methylhydrogensiloxane copolymer, both ends of molecular chain dimethylhydrogensiloxy group-capped dimethylsiloxane / methylphenylsiloxane copolymer, dimethylhydrogen, both ends of molecular chain Siloxy group-blocked dimethylsiloxane / diphenylsiloxane copolymer, molecular chain both ends dimethylhydrogensiloxy group-blocked methylphenylpolysiloxane, molecule And both ends endcapped with dimethyl hydrogen siloxy group diphenyl polysiloxane, in each of these exemplified compounds, those in which a part of the methyl group or entirely substituted with other alkyl groups such as ethyl group, a propyl group, the formula: R ⁴ ₃ Organosiloxane copolymer comprising a siloxane unit represented by SiO _0.5 and a siloxane unit represented by the formula: R ⁴ ₂ HSiO _0.5 and a siloxane unit represented by the formula: SiO ₂ , a siloxane unit represented by the formula: R ⁴ ₂ HSiO _0.5 And an organosiloxane copolymer composed of a siloxane unit represented by SiO ₂ , a formula: a siloxane unit represented by R ⁴ HSiO and a formula: a siloxane unit represented by R ⁴ SiO _1.5 or a siloxane unit represented by a formula: HSiO _1.5 An organosiloxane copolymer comprising two or more of these organopolysiloxanes A mixture consisting of the above is mentioned. R ⁴ in the above formula is a monovalent hydrocarbon group other than an alkenyl group, and examples thereof include the same groups as described above.

  (B) The compounding quantity of a component is 1-10 mol (or piece) of silicon atom bond hydrogen atoms in (B) component with respect to 1 mol (or piece) of silicon atom bond alkenyl groups in (A) component, The amount is preferably in the range of 1 to 5 moles (or pieces). When the silicon atom-bonded hydrogen atom in component (B) is less than 1 mole relative to 1 mole of silicon-bonded alkenyl group in component (A), the composition does not cure sufficiently, and this exceeds 10 moles. And the heat resistance of the silicone rubber obtained is extremely inferior.

[Component (C)]
As the addition reaction catalyst for component (C), any catalyst can be used as long as it promotes the hydrosilylation addition reaction between the silicon-bonded alkenyl group in component (A) and the SiH group in component (B). Also good. (C) A component may be used individually by 1 type, or may use 2 or more types together.
Examples of the component (C) include platinum group metals such as platinum, palladium and rhodium, chloroplatinic acid, alcohol-modified chloroplatinic acid, chloroplatinic acid and olefins, coordination compounds of vinylsiloxane or acetylene compounds, tetrakis ( Platinum group metal compounds such as triphenylphosphine) palladium and chlorotris (triphenylphosphine) rhodium may be mentioned, with platinum compounds being particularly preferred.

  The compounding amount of the component (C) may be an effective amount as an addition reaction catalyst, preferably in the range of 1 to 500 ppm in terms of the mass of the catalytic metal element with respect to the total mass of the components (A) and (B), More preferably, it is the range of 10-100 ppm. If the blending amount is within this range, the addition reaction is likely to be sufficiently promoted, the curing is likely to be sufficient, and the rate of the addition reaction is easily improved as the blending amount is increased. It tends to be advantageous.

[(D) component]
The finely divided silica of component (D) optionally used in the present invention as required functions as a reinforcing agent. That is, high tear strength is imparted to the cured product of the composition of the present invention. By using fine powder silica of component (D) as a reinforcing agent, a coating film having excellent tear strength characteristics can be formed.

The fine powder silica of component (D) has a specific surface area of 50 m ² / g or more, preferably 50 to 400 m ² / g, particularly preferably 100 to 300 m ² / g. When the specific surface area is in this range, it is easy to impart excellent tear strength characteristics to the resulting cured product. The specific surface area is measured by the BET method.
(D) A component may be used individually by 1 type, or may use 2 or more types together.

  As the fine powder silica of component (D), as long as the specific surface area is within the above range, known ones conventionally used as reinforcing fillers for silicone rubber can be used. For example, fumed silica, Examples include precipitated silica.

  These finely divided silicas may be used as they are, but in order to easily give better fluidity to the composition of the present invention, methylchlorosilanes such as trimethylchlorosilane, dimethyldichlorosilane, and methyltrichlorosilane; dimethyl Polysiloxane: Hydrophobic fine powder silica by surface hydrophobizing treatment with surface treatment agents such as hexamethyldisilazane, organosilicon compounds such as hexaorganodisilazane such as divinyltetramethyldisilazane, etc. It is preferable to use it. The surface hydrophobization treatment may be carried out by previously mixing one or more fine powder silicas with one or more surface treatment agents under heating or non-heating. Alternatively, when the component of the composition containing the alkenyl group-containing organopolysiloxane as the component (A) and fine powder silica are mixed, a surface treatment may be performed by the same treatment.

  (D) The compounding quantity of a component is 50 mass parts or less (namely, 0-50 mass parts) with respect to 100 mass parts of (A) component organopolysiloxane. When the blending amount exceeds 50 parts by mass, the fluidity of the composition tends to be lowered and the coating workability tends to be deteriorated. The blending amount is preferably 0.1 to 50 parts by mass, more preferably 1 to 50 parts by mass, and particularly preferably 5 to 40 parts by mass. When the blending amount is within this range, it is easy to give particularly good high tear strength to the cured product of the composition of the present invention.

[(E) component]
The organosilicon compound having an organooxy group bonded to a silicon atom forming the non-siloxane structural unit of the component (E) is an adhesion improver that improves the adhesion of a silicone rubber obtained by curing the composition to a substrate. It acts as. The organosilicon compound is represented by the following general formula (1).
(R ¹ O) ₃ Si—R ² —Si (OR ¹ ) ₃ (1)
Wherein R ¹ is the same or different unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and R ² is an unsubstituted or substituted carbon atom having 2 carbon atoms which may contain a silicon atom. These are the above divalent hydrocarbon groups.)

R ¹ in the general formula (1) preferably does not contain an aliphatic unsaturated bond, and is the same or different, unsubstituted or substituted monovalent carbon atom having 1 to 10 carbon atoms, preferably 1 to 8 carbon atoms. It is a hydrogen group. Specific examples of R ¹ include alkyl groups such as methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, hexyl group, octyl group, decyl group; phenyl group, tolyl group, Aryl groups such as xylyl group and naphthyl group; cycloalkyl groups such as cyclohexyl group; aralkyl groups such as benzyl group and phenylethyl group; halogen-substituted hydrocarbon groups such as chloromethyl group, bromoethyl group and trifluoropropyl group; cyanoethyl group And cyano group-substituted hydrocarbon groups such as Of these, alkyl groups such as a methyl group and an ethyl group are preferred. In General formula (1), when all R < ¹ > is alkyl groups, such as a methyl group or an ethyl group, a synthesis | combination is easy and chemical stability is good.

R ² is an unsubstituted or substituted divalent hydrocarbon group having 2 or more carbon atoms which may contain a silicon atom, and more preferably a diorganosilylene group (— (R ³ ) ₂ Si—structure. A linear, branched or cyclic alkylene group having 2 to 20 carbon atoms, particularly 3 to 10 carbon atoms, or 1 to 4, particularly 1 to 2 phenylene skeleton, It is an aromatic group such as a divalent arylene group or alkylene / arylene group having 6 to 40 carbon atoms, particularly 10 to 30 carbon atoms, which may contain a diorganosilylene group (— (R ³ ) ₂ Si—structure). is there. Here, R ³ is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and examples thereof are the same as those exemplified for R ¹ above.

（上記式中、ｎは２〜１０の整数、好ましくは６、８又は１０である。）
等が挙げられ、これらの中でも

が好ましい。 As R ² , specifically,

(In the above formula, n is an integer of 2 to 10, preferably 6, 8 or 10.)
Among these, among these

Is preferred.

The structure of the organosilicon compound (E) may be linear, cyclic, branched or the like, but is preferably linear, and the molecular chain terminal is an (R ¹ O) ₃ Si— group ( R ¹ is the same as above, and is preferably blocked with a trialkoxysilyl group.

Specific examples of the organosilicon compound of component (E) include those shown below.

また、上記各式においてメトキシ基（ＭｅＯ−）の全てをエトキシ基に置換した化合物を例示することができる。
なお、本発明において、（Ｅ）成分の有機ケイ素化合物は、１種単独で用いても２種以上を併用してもよい。

Moreover, the compound which substituted all the methoxy groups (MeO-) by the ethoxy group in each said formula can be illustrated.
In addition, in this invention, the organosilicon compound of (E) component may be used individually by 1 type, or may use 2 or more types together.

  The viscosity of the organosilicon compound (E) as measured by a rotational viscometer (for example, a BL type rotational viscometer) at 25 ° C. is preferably 1 to 500 mPa · s, more preferably 5 to 100 mPa · s. If the viscosity is too low, bleeding to the bonding surface may be too fast and sufficient adhesion may not be exhibited. If it is too high, bleeding to the bonding surface may be too slow, resulting in poor adhesion.

（式中、Ｒ¹は上記の通り。）
で示されるトリオルガノキシシランと、両末端アルケニル基含有化合物を付加反応させる方法が好適に採用される。
ここで、上記両末端アルケニル基含有化合物としては、その両末端アルケニル基がＳｉＨ基の水素原子に付加した場合、Ｒ²を形成する化合物が用いられる。 Here, as a method for producing the organosilicon compound of the component (E), the structure of the organosilicon compound represented by the above formula (1) and having an organooxy group bonded to a silicon atom forming a non-siloxane structural unit is used. As long as it is maintained, there is no limitation. For example, the following general formula (4)

(Wherein R ¹ is as described above.)
A method in which a triorganoxysilane represented by the above and an alkenyl group-containing compound at both ends are subjected to an addition reaction is suitably employed.
Here, as the alkenyl group-containing compound at both ends, a compound which forms R ² when the alkenyl groups at both ends are added to the hydrogen atom of the SiH group is used.

  The reaction ratio between the triorganoxysilane represented by the above formula (4) and the alkenyl group-containing compound at both ends is alkenyl of the alkenyl group-containing compound at both ends with respect to the number of moles of SiH groups in the above formula (4). The number of moles of the group is preferably 0.8 to 1.2. The addition reaction can be carried out according to a conventional method, and the addition reaction catalyst such as platinum or platinum compound is used in an amount such that the platinum amount is about 1 to 200 ppm relative to the total mass of the alkenyl group-containing compound used. It can be carried out at a reaction temperature of ˜150 ° C., in particular 50 ° to 120 ° C. In addition, reaction time is 30 minutes-24 hours normally.

  (E) The compounding quantity of a component is 0.1-10 mass parts with respect to 100 mass parts of (A) component organopolysiloxane, Preferably it is 0.25-5 mass parts. When the blending amount is less than 0.1 parts by mass, the resulting composition does not have sufficient adhesive strength. When the blending amount exceeds 10 parts by mass, even if the blending amount is increased, the resulting composition is difficult to improve the adhesive force, becomes expensive and tends to be uneconomical.

[(F) component]
The component (F) is an organosilicon compound having an epoxy group and a silicon atom-bonded alkoxy group in one molecule, and the organosilicon compound has an epoxy group and a silicon atom-bonded alkoxy group in one molecule. Any organosilicon compound can be used, but from the viewpoint of adhesion development, at least one epoxy group and at least two silicon-bonded alkoxy groups (for example, trialkoxysilyl group, organodialkoxysilyl group) Etc.), for example, organosilane, or cyclic or linear organosiloxane having 2 to 30 silicon atoms, preferably about 4 to 20 silicon atoms, and having at least one epoxy group And at least two silicon-bonded alkoxy groups. (F) A component may be used individually by 1 type, or may use 2 or more types together.

  The epoxy group is a silicon atom in the form of, for example, a glycidoxyalkyl group such as a glycidoxypropyl group; an epoxy-containing cyclohexylalkyl group such as a 2,3-epoxycyclohexylethyl group or a 3,4-epoxycyclohexylethyl group. It is preferable that it is couple | bonded with. A silicon atom-bonded alkoxy group is bonded to a silicon atom, for example, a trialkoxysilyl group such as a trimethoxysilyl group or a triethoxysilyl group; a methyldimethoxysilyl group, an ethyldimethoxysilyl group, a methyldiethoxysilyl group, an ethyldi It is preferable to form an alkyl dialkoxysilyl group such as an ethoxysilyl group.

In addition, the component (F) includes, for example, alkenyl groups such as vinyl groups, acrylic groups, (meth) acryloxy groups, and hydrosilyl groups (SiH) as functional groups other than epoxy groups and silicon-bonded alkoxy groups in one molecule. Si—R ² in the general formula (1) of the component (E), which may or may not have at least one functional group selected from the group consisting of groups It is different from the component (E) in that it does not have a -Si structure in the molecule.

  Examples of the organosilicon compound of component (F) include organosilicon compounds represented by the following chemical formula, mixtures of two or more thereof, or one or more partially hydrolyzed condensates thereof. .

（式中、ｈは１〜１０の整数、ｋは０〜１００の整数、好ましくは０〜２０の整数、ｐは１〜１００の整数、好ましくは１〜２０の整数、ｑは１〜１０の整数である。）

(In the formula, h is an integer of 1 to 10, k is an integer of 0 to 100, preferably 0 to 20, an p is an integer of 1 to 100, preferably an integer of 1 to 20, and q is 1 to 10. (It is an integer.)

  (F) The compounding quantity of a component is 0.1-10 mass parts with respect to 100 mass parts of organopolysiloxane of (A) component, Preferably it is 0.25-5 mass parts. When the blending amount is less than 0.1 parts by mass, the resulting composition does not have sufficient adhesive strength. When the blending amount exceeds 10 parts by mass, even if the blending amount is increased, the resulting composition is difficult to improve the adhesive force, becomes expensive and tends to be uneconomical.

[(G) component]
The component (G) is one or both of a titanium compound (particularly an organic titanium compound) and a zirconium compound (particularly an organic zirconium compound), and acts as a condensation promoter for adhesion promotion. (G) A component may be used individually by 1 type, or may use 2 or more types together.

  Examples of the component (G) include organic titanates such as titanium tetraisopropoxide, titanium tetranormal butoxide, titanium tetra-2-ethylhexoxide, titanium diisopropoxybis (acetylacetonate), titanium diiso Titanium-based condensation promoters (titanium compounds) such as propoxybis (ethyl acetoacetate), titanium tetraacetylacetonate, and other organic titanium chelate compounds, organic zirconium esters such as zirconium tetranormal propoxide, zirconium tetranormal butoxide, zirconium tributoxy Organic zirconium chelate compounds such as monoacetylacetonate, zirconium monobutoxyacetylacetonate bis (ethylacetoacetate), zirconium tetraacetylacetonate Zirconium condensation co-catalysts (zirconium compounds).

  (G) The compounding quantity of a component is 0.1-5 mass parts with respect to 100 mass parts of (A) component, Preferably it is the range of 0.2-2 mass parts. When the blending amount is less than 0.1 parts by mass, the obtained cured product is likely to have poor adhesion durability under high temperature and high humidity. If the blending amount exceeds 5 parts by mass, the resulting cured product is likely to be deteriorated in heat resistance.

[Other ingredients]
In addition to the components (A) to (G), the composition of the present invention may contain other optional components as long as the object of the present invention is not impaired. Specific examples thereof include the following. Each of these other components may be used alone or in combination of two or more.

-Reaction control agent A reaction control agent will not be specifically limited if it is a compound which has a hardening inhibitory effect with respect to the addition reaction catalyst of the said (C) component, A conventionally well-known thing can be used. Specific examples thereof include phosphorus-containing compounds such as triphenylphosphine; nitrogen-containing compounds such as tributylamine, tetramethylethylenediamine, and benzotriazole; sulfur-containing compounds; acetylene-based compounds such as acetylene alcohols; and containing two or more alkenyl groups. Compounds; hydroperoxy compounds; maleic acid derivatives and the like.

  Since the degree of the effect of inhibiting the curing by the reaction control agent varies depending on the chemical structure of the reaction control agent, it is preferable to adjust the addition amount of the reaction control agent to an optimum amount for each reaction control agent to be used. By adding an optimal amount of the reaction control agent, the composition is excellent in long-term storage stability and curability at room temperature.

Inorganic filler Examples of the inorganic filler include crystalline silica, hollow filler, silsesquioxane, fumed titanium dioxide, magnesium oxide, zinc oxide, iron oxide, aluminum hydroxide, magnesium carbonate, calcium carbonate, zinc carbonate, Inorganic fillers such as layered mica, carbon black, diatomaceous earth, and glass fiber; these inorganic fillers are hydrophobized with organosilicon compounds such as organoalkoxysilane compounds, organochlorosilane compounds, organosilazane compounds, and low molecular weight siloxane compounds. Treated filler; silicone rubber powder; silicone resin powder and the like.

Other components In addition, for example, an organopolysiloxane containing one silicon-bonded hydrogen atom in one molecule and no other functional group, one silicon-bonded alkenyl group in one molecule Non-functional organopolysiloxanes that contain no functional groups and no other functional groups, no silicon-bonded hydrogen atoms, no silicon-bonded alkenyl groups, or other functional groups, organic solvents, creep hardening An inhibitor, a plasticizer, a thixotropic agent, a pigment, a dye, a fungicide, and the like can be blended.

[Preparation method]
The liquid silicone rubber coating composition of the present invention can be prepared by mixing the above-mentioned components according to a conventional method, and the viscosity of the composition is usually 10 to 500 Pa · s at 25 ° C., preferably Can be about 20 to 200 Pa · s.

<Airbag>
The liquid silicone rubber coating composition thus obtained is excellent in adhesion to the airbag fabric, and is stored along the roof side from the front pillar. It is suitable for producing a curtain airbag that is required to maintain a constant expansion time in order to prevent popping out.

  In the present invention, a known structure is used as an air bag, particularly a curtain air bag, on which a silicone rubber coating layer made of a cured product of the above composition is formed. Specific examples thereof include 6,6-nylon. , 6-nylon, polyester fiber, aramid fiber, various polyamide fibers, various synthetic fibers, such as various woven fabrics of the base fabric, the outer periphery of two plain weave base fabrics coated with rubber on the inner surface And a bag weave type air bag in which the woven fabric is used as a base fabric and a bag portion is formed by weaving.

[Production method]
The liquid silicone rubber coating composition is applied to at least one surface of a substrate made of a fiber cloth, in particular, one surface, and is heated in a hot air drying oven and cured to cure the silicone rubber coating. A layer can be formed. A curtain airbag can be manufactured using the silicone rubber coating base fabric for curtain airbags obtained in this way.

Here, as a base material which consists of fiber cloths, the base material which makes the base fabric the woven fabric of the various synthetic fibers mentioned above is mentioned. In addition, as a method of coating the substrate with the composition, a conventional method can be adopted, but the thickness (or surface coating amount) of the coating layer is preferably 10 to 150 g / m ² , more preferably. Is 15 to 80 g / m ² , more preferably about 20 to 60 g / m ² .

  The liquid silicone rubber coating composition of the present invention can be cured by a known curing method under known curing conditions. Specifically, for example, the composition can be cured by heating at 120 to 180 ° C. for 1 to 10 minutes.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In the following examples, Me represents a methyl group.

[Example 1]
Both ends of the molecular chain are blocked with a vinyldimethylsiloxy group, and 65 parts by mass of dimethylpolysiloxane having a viscosity at 25 ° C. of about 30,000 mPa · s, 8 parts by mass of hexamethyldisiloxane, 2 parts by mass of water, and BET method 40 parts by mass of fumed silica (Aerosil (registered trademark) 300, manufactured by Nippon Aerosil Co., Ltd.) having a measured specific surface area of about 300 m ² / g was put into a kneader at room temperature and mixed for 1 hour to obtain a mixture. The mixture was heated to 150 ° C. and subsequently mixed for 2 hours. The mixture was cooled to room temperature, and 19 parts by mass of dimethylpolysiloxane having both molecular chain ends blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 30,000 mPa · s were added to the mixture. 5 parts by weight of dimethylpolysiloxane containing 5 mol% of vinylmethylsiloxane units with respect to all diorganosiloxane units and having both molecular chain ends blocked with trimethylsiloxy groups and having a viscosity at 25 ° C. of about 700 mPa · s Was added and mixed until uniform to obtain a base compound (I).

78 parts by mass of the base compound (I) obtained above, 35 parts by mass of dimethylpolysiloxane having both ends of the molecular chain blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 5,000 mPa · s, 15 parts by weight of dimethylpolysiloxane having both ends blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 1,000 mPa · s, 39.5 mol% of (CH ₃ ) ₃ SiO _1/2 units and (CH ₃ ) ₂ (CH ₂ ═CH) 10 parts by mass of an organopolysiloxane resin composed of 6.5 mol% of SiO _1/2 units and 54 mol% of SiO ₂ units, viscosity at 25 ° C. is 45 mPa · s, molecular chain Dimethylsiloxane / methylhydrogensiloxane copolymer blocked with trimethylsiloxy group at both ends of the molecular chain having silicon-bonded hydrogen atoms in the side chain (silicon-bonded hydrogen) (Atom content = 1.08% by mass) 6.4 parts by mass, 0.5 parts by mass of an organosilicon compound represented by the following formula (5) and having a viscosity at 25 ° C. of 30 mPa · s, 1-ethynylcyclohexanol 0 0.09 parts by mass, 0.38 parts by mass of a dimethylpolysiloxane solution containing 1% by mass of a chloroplatinic acid / 1,3-divinyltetramethyldisiloxane complex as a platinum atom content, and γ-glycidoxypropyltrimethoxysilane 0 .3 parts by mass and 0.2 parts by mass of titanium tetra-2-ethylhexoxide were mixed to form a mole of SiH groups in component (B) with respect to silicon-bonded vinyl groups in component A (component (A). Ratio: SiH / SiVi (hereinafter the same) = 5) was prepared.

  Various tests shown below (measurement of hardness, elongation at break, tensile strength, tear strength, peel strength, and Scott stagnation test) were performed using the composition A thus obtained.

<Hardness, elongation at break, tensile strength, tear strength>
The composition A is press-cured at 150 ° C. for 5 minutes and then post-cured at 150 ° C. for 1 hour to prepare a sheet according to JIS K 6249. The sheet is hardened according to JIS K 6249, and stretched when cut. The tensile strength and tear strength were measured. The results are shown in Table 1.

<Peel adhesive strength>
The composition A was uniformly coated on a 6,6-nylon base fabric for an air bag with a coater (60 g / m ² ) and cured by heating in an oven at 170 ° C. for 1 minute to obtain a silicone rubber-coated nylon base fabric. Obtained. The peel adhesive strength of the silicone rubber coating layer to the nylon base fabric was measured as follows. Two pieces of silicone rubber-coated nylon base cloth having a width of 50 mm are bonded together with the adhesive so that the thickness of the addition curing type room temperature curing type silicone adhesive X-32-2600A / B becomes 0.6 mm, The adhesive was allowed to cure for 24 hours. Next, the two bonded silicone rubber-coated nylon base fabrics were cut to produce a 20 mm wide piece, and this piece was subjected to a T-shaped peel test at a tensile speed of 200 mm / min. The results are shown in Table 1.

<Scott itch test>
The Scott stagnation test was performed using a Scott stagnation tester. The above silicone rubber coated nylon base fabric is subjected to a stagnation test 500 times at a pressing pressure of 5 kgf, and then the state of destruction of the coating part is visually confirmed, and the case where the silicone rubber coating layer is not peeled off from the coating surface is passed. The case where it peeled was evaluated as disqualified. The results are shown in Table 1.

[Example 2]
To 78 parts by mass of the base compound (I) obtained in Example 1, 35 parts by mass of dimethylpolysiloxane having both molecular chain ends blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 5,000 mPa · s, 15 parts by mass of dimethylpolysiloxane having both ends of the molecular chain blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 1,000 mPa · s, 39.5 mol% of (CH ₃ ) ₃ SiO _1/2 units, (CH ₃ ) ₂ (CH ₂ ═CH) 10 parts by mass of an organopolysiloxane resin composed of 6.5 mol% of SiO _1/2 units and 54 mol% of SiO ₂ units, and a viscosity at 25 ° C. of 45 mPa · s, Dimethylsiloxane / methylhydrogensiloxane copolymer blocked with trimethylsiloxy group at both ends of the molecular chain having silicon-bonded hydrogen atoms in the side chain 6.4 parts by mass of hydrogen atom content = 1.08% by mass) 0.5 parts by mass of an organosilicon compound represented by the following formula (6) and having a viscosity of 30 mPa · s at 25 ° C., 1-ethynylcyclohexanol 0.09 parts by mass, 0.38 parts by mass of dimethylpolysiloxane solution containing 1% by mass of chloroplatinic acid / 1,3-divinyltetramethyldisiloxane complex as platinum atom content, γ-glycidoxypropyltrimethoxysilane 0.3 parts by mass and 0.2 parts by mass of titanium tetra-2-ethylhexoxide were mixed to prepare composition B (SiH / SiVi = 5).

  About the hardened | cured material of the composition B, it carried out similarly to Example 1, and measured the hardness, elongation at the time of cutting | disconnection, tensile strength, tear strength, and peel adhesive force, and the Scott sag test. The results are shown in Table 1.

[Example 3]
To 78 parts by mass of the base compound (I) obtained in Example 1, 35 parts by mass of dimethylpolysiloxane having both molecular chain ends blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 5,000 mPa · s, 15 parts by mass of dimethylpolysiloxane having both ends of the molecular chain blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 1,000 mPa · s, 39.5 mol% of (CH ₃ ) ₃ SiO _1/2 units, (CH ₃ ) ₂ (CH ₂ ═CH) 10 parts by mass of an organopolysiloxane resin composed of 6.5 mol% of SiO _1/2 units and 54 mol% of SiO ₂ units, and a viscosity at 25 ° C. of 45 mPa · s, Dimethylsiloxane / methylhydrogensiloxane copolymer blocked with trimethylsiloxy group at both ends of the molecular chain having silicon-bonded hydrogen atoms in the side chain 6.4 parts by mass of hydrogen atom content = 1.08% by mass) 0.5 parts by mass of an organosilicon compound represented by the following formula (7) and having a viscosity at 25 ° C. of 30 mPa · s, 1-ethynylcyclohexanol 0.09 parts by mass, 0.38 parts by mass of dimethylpolysiloxane solution containing 1% by mass of chloroplatinic acid / 1,3-divinyltetramethyldisiloxane complex as platinum atom content, γ-glycidoxypropyltrimethoxysilane 0.3 parts by mass and 0.2 parts by mass of titanium tetra-2-ethylhexoxide were mixed to prepare a composition C (SiH / SiVi = 5).

  About the hardened | cured material of the composition C, it carried out similarly to Example 1, and measured the hardness, elongation at the time of cutting, tensile strength, tear strength, and peel adhesive force, and the Scott sag test. The results are shown in Table 1.

[Comparative Example 1]
To 78 parts by mass of the base compound (I) obtained in Example 1, 35 parts by mass of dimethylpolysiloxane having both molecular chain ends blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 5,000 mPa · s, 15 parts by mass of dimethylpolysiloxane having both ends of the molecular chain blocked with vinyldimethylsiloxy groups and a viscosity at 25 ° C. of about 1,000 mPa · s, 39.5 mol% of (CH ₃ ) ₃ SiO _1/2 units, (CH ₃ ) ₂ (CH ₂ ═CH) 10 parts by mass of an organopolysiloxane resin composed of 6.5 mol% of SiO _1/2 units and 54 mol% of SiO ₂ units, and a viscosity at 25 ° C. of 45 mPa · s, Dimethylsiloxane / methylhydrogensiloxane copolymer blocked with trimethylsiloxy group at both ends of the molecular chain having silicon-bonded hydrogen atoms in the side chain (Hydrogen atom content = 1.08 mass%) 6.4 mass parts, 1-ethynylcyclohexanol 0.09 mass parts, chloroplatinic acid / 1,3-divinyltetramethyldisiloxane complex as platinum atom content 1 mass % Dimethylpolysiloxane solution 0.38 parts by weight, γ-glycidoxypropyltrimethoxysilane 0.3 parts by weight, titanium tetra-2-ethylhexoxide 0.2 parts by weight, (SiH / SiVi = 5) was prepared.

  About the hardened | cured material of the composition D, it carried out similarly to Example 1, and measured the hardness, elongation at the time of cutting, tensile strength, tear strength, and peel adhesive force, and the Scott sag test. The results are shown in Table 1.

[Comparative Example 2]
A composition E was prepared by mixing 0.2 parts by mass of titanium tetra-2-ethylhexoxide from the composition A of Example 1 to prepare a composition E. In the same manner as in Example 1, hardness and cutting Measurements of time elongation, tensile strength, tear strength and peel adhesion and Scott stagnation test were conducted. The results are shown in Table 1.

[Comparative Example 3]
A composition F was prepared by mixing 0.3 parts by mass of γ-glycidoxypropyltrimethoxysilane from the composition B of Example 2, and preparing a composition F. In the same manner as in Example 1, hardness and cutting Measurements of time elongation, tensile strength, tear strength and peel adhesion and Scott stagnation test were conducted. The results are shown in Table 1.

Claims (10)

(A) Organopolysiloxane containing two or more alkenyl groups bonded to silicon atoms in one molecule: 100 parts by mass
(B) Organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms in one molecule:
The number of hydrogen atoms bonded to silicon atoms contained in this component is (A)
An amount of 1 to 10 per silicon-bonded alkenyl group in the minute,
(C) addition reaction catalyst: effective amount,
(D) Fine powder silica having a specific surface area of 50 m ² / g or more: 0 to 50 parts by mass,
(E) Organosilicon compound having an organooxy group bonded to a silicon atom forming a non-siloxane structural unit represented by the following general formula (1): 0.1 to 10 parts by mass
(R ¹ O) ₃ Si—R ² —Si (OR ¹ ) ₃ (1)
Wherein R ¹ is the same or different unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and R ² is an unsubstituted or substituted carbon atom having 2 carbon atoms which may contain a silicon atom. These are the above divalent hydrocarbon groups.)
(F) Organosilicon compound having an epoxy group and a silicon atom-bonded alkoxy group in one molecule: 0.1 to 10 parts by mass, and (G) any one or both of a titanium compound and a zirconium compound: 0.1 A liquid silicone rubber coating agent composition comprising 5 parts by mass. (E) R ² of the formula (1) in the organosilicon compound having an organooxy group bonded to a silicon atom forming the non-siloxane structural unit of the component may have a diorganosilylene group and has ² to 20 carbon atoms. A linear, branched or cyclic alkylene group, or a divalent aromatic hydrocarbon group having 6 to 40 carbon atoms which contains 1 to 4 phenylene skeletons and may contain a diorganosilylene group. The liquid silicone rubber coating composition according to claim 1, wherein   The organosilicon compound having an organooxy group bonded to a silicon atom forming the non-siloxane structural unit of the component (E) is linear, and both ends of the molecular chain are blocked with trialkoxysilyl groups. The liquid silicone rubber coating composition according to claim 1 or 2.   The liquid silicone rubber coating composition according to any one of claims 1 to 3, wherein the component (G) is an organic titanium compound.   The liquid silicone rubber coating composition according to claim 4, wherein the organic titanium compound as component (G) is an organic titanate, an organic titanium chelate compound, or a combination thereof.   The liquid silicone rubber coating composition according to any one of claims 1 to 3, wherein the component (G) is an organic zirconium compound.   The liquid silicone rubber coating composition according to claim 6, wherein the organic zirconium compound as component (G) is an organic zirconium ester, an organic zirconium chelate compound, or a combination thereof.   The liquid silicone rubber coating composition according to any one of claims 1 to 7, which is used for a curtain airbag.   By applying the composition according to any one of claims 1 to 7 to at least one surface of a substrate made of a fiber cloth, and curing the composition, on at least one surface of the substrate, A method for producing a curtain airbag, comprising forming a silicone rubber coating layer comprising a cured product of the composition.   It has a base material consisting of a fiber cloth, and a silicone rubber coating layer consisting of a cured product of the composition according to any one of claims 1 to 7, wherein the silicone rubber coating layer is at least one of the base materials. Curtain airbag formed on the surface.