Patent ID: 8440311

Claim:
A silicone coating composition (A) curable by polyaddition reactions, for coating a woven, knitted or nonwoven fibrous support comprising a mixture formed from: (a) at least one polyorganosiloxane (I) containing, per molecule, at least two C2-C6 alkenyl groups linked to silicon, (b) at least one polyorganosiloxane (II) containing, per molecule, at least two hydrogen atoms linked to silicon, (c) a catalytically effective amount of at least one catalyst (III), composed of at least one metal belonging to the platinum group, (d) at least one adhesion promoter (IV), (e) an additive system (B) for improving the combing strength and the tear strength, said additive system comprising a mixture formed from: at least one polyorganosiloxane resin (V), optionally mixed with at least one polyorganosiloxane serving as diluent, and calcium carbonate (CaCO 3 ); (f) optionally, at least one curing inhibitor (VI), (h) optionally, at least one coloration additive (VII), and (j) optionally, at least one additive (VII) for improving the fire resistance wherein said at least one polyorganosiloxane resin (V) is present at up to 60% by weight relative to the total weight of the curable silicone coating composition and calcium carbonate is present from 10% to 19% by weight relative to the total weight of the curable silicone coating composition, and wherein the coating composition, upon curing on the woven, knitted or nonwoven fibrous support, provides increased combing strength and tearing strength to the support.