Patent ID: 7385021
Filing Date: 2008-06-10
Classification: C08K,C08L,G03F

Abstract:
1. A sacrificial film-forming composition comprising (A) 100 parts by weight of an organofunctional silicone resin which is a co-hydrolytic condensate of a hydrolyzable silane having the general formula (1) and a hydrolyzable silane having the general formula (3), or a hydrolyzable silane having the general formula (1) and hydrolyzable silanes having the general formulas (2) and (3), wherein Z is a hydrolyzable group; X is a crosslinkable organofunctional group selected from the group consisting of a hydroxyl group which may be substituted with an acid or thermally labile functional group, a substituted or unsubstituted epoxy group, a substituted or unsubstituted acyloxy group or a substituted or unsubstituted acryloxy group; and Y is single bond or a substituted or unsubstituted divalent (or trivalent when bonded to both two carbon atoms of an epoxy group) hydrocarbon group which may have an ether bond, ester bond or saturated cyclic structure in its structure, with the proviso that Y is not a single bond when X is a hydroxyl group, wherein Z is a hydrolyzable group and may be identical with or different from Z in formula (1), R is hydrogen or a substituted or unsubstituted monovalent hydrocarbon group which does not undergo a crosslinking reaction with other organic groups, and n is an integer of 0 to 3, wherein Z is a hydrolyzable group and may be identical with or different from Z in formulae (1) and (2), and P—Si is a group selected from the group consisting of the following formulas: wherein Me is methyl and m is a number 1 to 200, said organofunctional silicone resin having a weight average molecular weight of at least 500, (B) 1 to 20 parts by weight of a crosslinking agent which reacts with the crosslinkable organofunctional group in formula (1)in the presence of an acid catalyst to provide a curing ability component to (A), (C) 0.001 to 5 parts by weight of an acid generator, (D) 5 to 400 parts by weight of an extender or an organic resin component which readily decomposes and volatilizes upon heating, and (E) 100 to 50,000 parts by weight of an organic solvent.