Patent ID: 7781560

Claim:
A curable organopolysiloxane composition comprising: (A) 100 parts by mass of an organopolysiloxane (a1) that contains in one molecule at least one silicon-bonded alkoxysilyl-containing group represented by the following general formula: where R 1 s are the same or different bivalent organic groups, R 2 s are the same or different univalent hydrocarbon groups which are free of aliphatic unsaturated bonds, R 3 is an alkyl group, “m” is an integer from 1 to 50, and “a” is an integer from 0 to 2 and an average of at least 0.5 alkenyl groups; or a mixture of said organopolysiloxane (a1) with an organopolysiloxane (a2) that contains in one molecule at least two alkenyl groups and that is free of the aforementioned alkoxysilyl-containing groups wherein the content of constituent (a1) in the mixture is in the range of 10 to 100 mass % (exclusive of 100 mass %); (B) an organopolysiloxane that contains in one molecule at least two silicon-bonded hydrogen atoms wherein the amount of silicon-bonded hydrogen atoms of this component is in the range of 0.3 to 20 per 1 alkenyl group of component (A); (C) an organosilicon compound that contains in one molecule at least one silicon-bonded alkoxy group and that is free of the aforementioned alkoxysilyl-containing groups wherein the content of this component is in the range of 0.01 to 20 parts by mass per 100 parts by mass of the sum of components (A) and (B); and (D) a catalytic quantity of a hydrosilylation-reaction catalyst.