Patent ID: 6376569
Filing Date: 2002-04-23
Classification: C07F,C08G,C08K,C08L,Y10T

Abstract:
Radiation-curable composition comprising:(a) a polyorganohydrosiloxane having the general formula: whereineach R16 can be the same or different and represents an alkyl group, an cycloalkyl group, a phenyl group, or hydrogen, at least two but no more than one-half of all the R16 groups in the siloxane being hydrogen, m represents 0, 1, 2, 3, and n represents a number having an average value from one to about 3000, (b) a polyorganosiloxane having the general formula: whereineach R14 can be the same or different and represents a non-halogenated or halogenated ethylenically unsaturated group, a non-halogenated or halogenated alkyl group or cycloalkyl group, or the phenyl group, at least 70% of all R14 group being methyl groups, but no more than 10% of all R14 groups being vinyl or other alkenyl, h represents a number having a value from 1 to about 3000, and g represents 0, 1, 2, 3, (c) a platinum complex represented by the formula: whereinCp represents a cyclopentadienyl group that is eta-bonded to the platinum atom, the cyclopentadienyl group being unsubstituted or substituted with one or more groups that do not interfere in a hydrosilation reaction, and each of R1, R2, and R3 represents an aliphatic group having from one to eighteen carbon atoms, said R1, R2, and R3 groups being sigma-bonded to the platinum atom, (d) a free-radical photoinitiator that is capable of absorbing actinic radiation and has the general formula: wherein R4 represents an unsubstituted aryl group or an aryl group substituted with one or more groups that do not interfere with the hydrosilation reaction, R5, R6, and R7 each independently represents a member selected from the group consisting of unsubstituted aryl groups and aryl groups substituted with one or more groups that do not interfere with the hydrosilation reaction, aliphatic groups having one to eighteen carbon atoms, and hydrogen.