Coating method and silicone composition for PSA release coating

Claim 1

A method comprising (i) applying to a substrate a liquid composition which cures when applied to a substrate and exposed to moisture, said liquid composition being prepared by mixing, under substantially anhydrous conditions, components comprising (A) 100 parts by weight of an organopolysiloxane fluid bearing an average of at least two silicon-bonded, alkoxysilylorganic radicals per molecule, said radicals having the formula --QSiR a 1 (OR 2 ) 3-a and said organopolysiloxane fluid having the formula ZR 2 1 SiO(Me 2 SiO) x (MeRSiO) y SiR 2 1 Z, (B) a titanium ester, or a partial hydrolyzate or a partial alcoholate thereof, soluble in said liquid composition, in sufficient amount to provide from 0.5 to 4.0 parts by weight of titanium, and (C) from 0.5 to 50 parts by weight of an aminoorganosiloxane bearing an average of at least 1 silicon-bonded aminoorgano radical per molecule, said aminoorgano radical having the formula --Q(NR 3 CH 2 CH 2 ) m NHR 3 , all other silicon-bonded radicals of the aminoorganosiloxane being selected from the group consisting of siloxane oxygen atoms, R 1 radicals and OR 2 radicals; wherein, independently at each occurrence in the components, R denotes the --QSiR a 1 (OR 2 ) 3-a radical; R 1 denotes a monovalent hydrocarbon radical having from 1 to 6, inclusive, carbon atoms; R 2 denotes a methyl, ethyl, propyl or methoxyethyl radical; R 3 denotes a H atom or an R 1 radical; Q denotes an alkylene radical; Z denotes an R radical or an R 1 radical; Me denotes a methyl radical; a has a value of 0 or 1; x has an average value of from about 50 to 500; y has an average value of from 0 to (x+y)/4; and m has a value of from 0 to about 3, and (ii) exposing the applied liquid composition to a moisture-containing environment until the applied composition has attained at least the desired amount of cure.

Claim 2

A method comprising (i) applying to a substrate a liquid composition which cures when applied to a substrate and exposed to moisture, said liquid composition being prepared by mixing, under substantially anhydrous conditions, components comprising (A) 100 parts by weight of an organopolysiloxane fluid bearing an average of at least two silicon-bonded, alkoxysilylorganic radicals per molecule, said radicals having the formula --QSiR a 1 (OR 2 ) 3-a and said organopolysiloxane fluid having the formula ZR 2 1 SiO(Me 2 SiO) x (MeRSiO) y SiR 2 1 Z, (B) a titanium ester, or a partial hydrolyzate or a partial alcoholate thereof, soluble in said liquid composition, in sufficient amount to provide from 0.5 to 4.0 parts by weight of titanium, and (C) from 0.5 to 50 parts by weight of an aminoorganosiloxane bearing an average of at least 1 silicon-bonded aminoorgano radical per molecule, said aminoorgano radical having the formula --Q(NR 3 CH 2 CH 2 ) m NHR 3 , all other silicon-bonded radicals of the aminoorganosiloxane being selected from the group consisting of siloxane oxygen atoms, R 1 radicals and OR 2 radicals; wherein, independently at each occurrence in the components, R denotes the --QSiR a 1 (OR 2 ) 3-a radical; R 1 denotes a monovalent hydrocarbon radical having from 1 to 6, inclusive, carbon atoms; R 2 denotes a methyl, ethyl, propyl or methoxyethyl radical; R 3 denotes a H atom or an R 1 radical; Q denotes an alkylene radical; Z denotes an R radical or an R 1 radical; Me denotes a methyl radical; a has a value of 0 or 1; x has an average value of from about 50 to 500; y has an average value of from 0 to (x+y)/4; and m has a value of from 0 to about 3, and (ii) exposing the applied liquid composition to a moisture-containing environment until the applied composition has attained at least the desired amount of cure.