Silicone rubber composition for textile coating and silicone rubber-coated textile
A silicone rubber composition for textile coating is disclosed. The silicone rubber composition comprises: (A) an organopolysiloxane having at least two alkenyl groups in a molecule and having a viscosity at 25° C. of from 100 to 1000000 mPa·s; (B) an organopolysiloxane represented by an average unit formula described herein; (C) a hydrosilylation catalyst; (D) a reinforcing silica fine powder; (E) an organotitanium compound and/or an organozirconium compound; and (F) an alkoxysilane having an epoxy group and/or an alkoxysilane having a methacryl group or an acryl group. The silicone rubber composition generally reduces formation and/or expansion of openings even when a large tension is applied to a textile coated with the silicone rubber composition. A silicone rubber-coated textile and method of formation are also disclosed.
1. A silicone rubber composition for textile coating, the silicone rubber composition comprising:
(A) 100 parts by mass of an organopolysiloxane having at least two alkenyl groups in a molecule and having a viscosity at 25° C. of from 100 to 1000000 mPa·s;
(B) an organopolysiloxane represented by the average unit formula:
(R 1 3 SiO 1/2 ) a (R 1 2 SiO 2/2 ) b (R 2 SiO 3/2 ) c (SiO 4/2 ) d
where each R 1 is an independently selected unsubstituted or halogen-substituted monovalent hydrocarbon group having no aliphatic unsaturated bond or a hydrogen atom; provided that, at least two R 1 in the molecule are hydrogen atoms; R 2 is an unsubstituted or a halogen-substituted monovalent hydrocarbon group having no aliphatic unsaturated bond; and a, b, c, and d are 0 or positive numbers satisfying 0≤a<1, 0≤b<1, 0≤c<1, 0≤d<1, and (a+b+c+d)=1; provided that, a and b are not simultaneously 0, and c and d are not simultaneously 0; wherein component (B) is present in an amount such that the amount of silicon atom-bonded hydrogen atoms in component (B) is from 1 to 5 mol per 1 mol of alkenyl groups in component (A);
(C) a hydrosilylation catalyst; wherein component (C) is present in an amount that accelerates curing of the silicone rubber composition;
(D) from 1 to 50 parts by mass of a reinforcing silica fine powder;
(E) from 0.01 to 5 parts by mass of an organotitanium compound and/or an organozirconium compound; and
(F) from 0.05 to 10 parts by mass of an alkoxysilane having an epoxy group and/or an alkoxysilane having a methacryl group or an acryl group.
2. The silicone rubber composition for textile coating according to claim 1 , further comprising (G) from 0.01 to 5 parts by mass of a silanol group-containing organosiloxane oligomer per 100 parts by mass of component (A).
3. A silicone rubber-coated textile formed by coating the silicone rubber composition for textile coating according to claim 1 on a surface of a textile and curing the silicone rubber composition.
4. The silicone rubber-coated textile according to claim 3 , wherein the textile is a hollow-woven textile.
5. The silicone rubber-coated textile according to claim 3 , wherein the textile is a base fabric for an airbag.
6. The silicone rubber-coated textile according to claim 3 , wherein the textile is a base fabric for a curtain shield airbag.
7. A silicone rubber-coated textile formed by coating the silicone rubber composition for textile coating according to claim 2 on a surface of a textile and curing the silicone rubber composition.
8. The silicone rubber-coated textile according to claim 7 , wherein the textile is a hollow-woven textile.
9. The silicone rubber-coated textile according to claim 7 , wherein the textile is a base fabric for an airbag.
10. The silicone rubber-coated textile according to claim 7 , wherein the textile is a base fabric for a curtain shield airbag.