Patent ID: 7090923

Claim:
An aqueous emulsion comprising a release composition, said release composition comprising: (A) additives for anchorage of release coatings consisting essentially of: (R a SiO 4−a)/2 ) n wherein: n is an integer greater than 3; a is from 1 to 3; R is independently selected from the group consisting of a carboxylic acid anhydride containing radical having from one to forty carbon atoms, monovalent hydrocarbon radicals, monovalent hydrocarbonoxy radicals, and hydride atoms, with at least one carboxylic acid anhydride and hydride being present on the molecule; (B) a curable alkenyl silicone having the formula: M Vi a T b D c M d wherein: a and b have values ranging from 2 to 5; c is an integer ranging from about 50 to about 1,000; d has a value ranging from 0 to about 0.5; and a +d>b; M Vi =R 1 3−p R 2 p SiO 1/2 , wherein: R 1 is independently selected from the group consisting of monovalent hydrocarbon radicals having one to forty carbon atoms, methyl, trifluoropropyl, and phenyl; R 2 is independently selected from the group consisting of terminal olefinic monovalent hydrocarbon radicals having two to forty carbon atoms and alkenyl groups having two to ten carbon atoms; p ranges from 1 to 3; T=R 3 SiO 3/2 , wherein: R 3 is independently selected from the group consisting of R 1 and R 2 ; D=R 4 R 5 SiO 2/2 , wherein: R 4 and R 5 are each independently selected from the group consisting of R 1 and R 2 ; M=R 1 3 SiO 1/2 , wherein: each R 1 is independently selected from the group consisting of monovalent hydrocarbon radicals having one to forty carbon atoms, methyl, trifluoropropyl, and phenyl; (C) a hydrogen siloxane selected from the group consisting of: MD e D′ f M, MD′ f M, MD e D′ f M′, M′D e D′ f M, and M′D e M′ wherein: M=R′ 3 SiO 1/2 ; M′=H g R′ 3−g SiO 1/2 ; D=R′R′SiO 2/2 ; and D′=R′HSiO 2/2 ; wherein each R′ in M, M′, D, and D′ is independently selected from the group consisting of monovalent hydrocarbon radicals having one to forty carbon atoms, methyl, trifluoropropyl, and phenyl; the subscripts e and f may be zero or positive whereby the sum of e and f ranges from about 10 to about 100 subject to the limitation that the sum of f and g is two or greater; and wherein said composition has a viscosity that ranges from about 100 to about 10,000 centipoise.