| 主权项 |
1. A curable silicone composition (A) useful for coating textile fabric and comprising:
(1) components (a-1) or (a-2):
(a-1) corresponding to at least one polyorganosiloxane that may be cured by the action of a catalyst based on at least one organic peroxide, and(a-2) corresponding to a polyorganosiloxane blend that may be cured by a polyaddition reaction, comprising:
at least one organopolysiloxane (I) having an average of at least two silicon-bonded aliphatically unsaturated hydrocarbon substituents on the molecule, andat least one organopolyorganosiloxane (II) and/or at least one organosilicon crosslinker (II′) having an average of at least 2 silicon-bonded hydrogen on the molecule, (2) an effective amount of a curing catalyst (III) comprising: when component (a-1) is used, at least one organic peroxide, and when component (a-2) is used, at least one catalyst able to promote reaction of aliphatically unsaturated hydrocarbon substituents with SiH groups, (3) at least 10 weight parts, per 100 weight parts of the curable silicone composition, of an organopolysiloxane resin (IV) of formula MMViQ and consisting essentially of:
(a) monovalent siloxane units MVi of the formula R′R2SiO1/2;(b) monovalent siloxane units M of the formula R3SiO1/2, and(c) tetravalent siloxane units Q of the formula SiO4/2 wherein R denotes a monovalent hydrocarbon group and R′ denotes a vinyl group: (4) an organopolysiloxane resin (V) different from said organopolysiloxane resin (IV) and comprising at least two different siloxane units chosen from those of M siloxane unit of formula R3SiO1/2, D siloxane unit of formula R2SiO2/2, T siloxane unit of formula RSiO3/2 and Q siloxane unit of formula SiO4/2, wherein R denotes a monovalent hydrocarbon group, on condition that at least one siloxane unit being a T or Q siloxane unit and that at least one of the M, D and T siloxane units comprises an alkenyl group (5) at least one adhesion promoter (VI), (6) at least one reinforcing filler (VII), (7) optionally at least one polydiorganosiloxane gum (XI) which is a linear or partially-branched homopolymer or copolymer having at least 2 alkenyl groups per molecule and said gum having a viscosity of greater than 500,000 mPa·s at 25° C., (8) optionally, at least one curing inhibitor (VIII), (9) optionally, at least one coloration additive (IX), and (10) optionally, at least one additive (X) for improving the fire resistance. |
