Patent ID: 7611998

Claim:
A process for producing a barrier fabric comprising the steps of preparing a coating composition consisting essentially of (1) at least one polyorganosiloxane oil having, per molecule, at least two C 2 -C 6 alkenyl groups linked to the silicon, (2) at least one polyhydrogenoorganosiloxane oil having, per molecule, at least two hydrogen atoms linked to the silicon, (3) a catalytically effective amount of at least one catalyst, comprised of at least one metal belonging to the platinum group, (4) an adhesion promoter consisting essentially of: (4.1) 3-trimethoxysilylpropylmethacrylate silane (MEMO), (4.2) at least one organosilicon compound which includes at least one epoxy radical, and (4.3) from 0.38 to 2.0% by weight based on the total weight of the coating composition of at least one metal M chelate and/or one metal alkoxide of the general formula: M(OJ) n , with n equal to the valency of M and J equal to a linear or branched C 1 -C 8 alkyl, M being selected from the group consisting of: Ti, Zr, Ge, Li, Mn, Fe, Al and Mg, (5) at least one polyorganosiloxane resin having at least two different functional units selected from the group consisting of R 3 SiO 0.5 (M functional unit), R 2 SiO (D functional unit), RSiO 1.5 (T functional unit), and SiO 2 (Q functional unit) wherein at least one of the functional units is a T or Q functional unit, in which the R radicals are the same or different and are linear or branched C 1 -C 6 alkyl, C 2 -C 4 alkenyl, phenyl or 3,3,3-trifluoropropyl radicals, said resin having an alkenyl group weight content of between 0.1 and 20% by weight, and (6) at least one cross-linking inhibitor; applying a first coat on one side of a woven textile fabric with from 10 to 45 g/m 2 of the coating composition; curing, at least partially, the first coat; applying a second coat onto the at least partially cured first coat with from 20 to 105 g/m 2 of the coating composition, the exposed surface of the second coat now considered the inner surface of the fabric and the uncoated surface of the fabric now considered the outer surface; and curing the second coat, with the proviso that the rate of curing of said first coat is lower than that of the rate of curing of the second coat.