Patent ID: 7632909

Claim:
A self-adhesive organopolysiloxane composition comprising (A) 100 parts by weight of an organopolysiloxane containing at least two silicon-bonded alkenyl groups on the molecule, (B) an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms on the molecule, in such an amount that 0.5 to 3.0 silicon-bonded hydrogen atoms are available per silicon-bonded alkenyl group in component (A), (C) an effective amount of a hydrosilylation catalyst, and (D) 0.2 to 10 parts by weight of an adhesive component obtained by previously mixing (i) a titanium chelate catalyst and/or an organoxytitanium of the general formula (1): Ti(OR 1 ) 4 (1) wherein R 1 is a monovalent hydrocarbon group of 2 to 10 carbon atoms and (ii) a silane coupling agent in a weight ratio (ii)/(i) in the range of 0.2 to 5.0, and aging the mixture by heating it at 40 to 100° C. for 5 to 100 hours whereby ester exchange reaction occurs between some alkoxy groups on the titanium catalyst and some alkoxy groups on the silane coupling agent and/or a portion of the silane coupling agent is hydrolyzed with moisture that is airborne or otherwise available in the presence of the titanium catalyst to form an oligomer.