C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 77/38 (2006.01) B01J 31/02 (2006.01) C08G 77/08 (2006.01) C08G 77/18 (2006.01) C08G 77/20 (2006.01) C08K 5/00 (2006.01) C08L 83/04 (2006.01) C08L 83/06 (2006.01)
Patent
CA 2190820
There is disclosed a curing catalyst useful for organopolysiloxane compositions, which cure through the action of both light and moisture, that have a radical photopolymerization initiator and a titanium compound condensation catalyst, and which do not induce a reciprocal deterioration in the respective catalytic activities. The curing catalyst comprises (a) from 1 to 99 wt% of a radical photopolymerization initiator of general formula: Image , where R1 is a substituted or unsubstituted aryl radical, R~ is hydrogen atom or a monovalent hydrocarbon radical, and R3 is an alkyl radical, and (b) from 99 to 1 wt% of a titanium compound condensation catalyst. Curable organopolysiloxane compositions containing the claimed curing catalyst provide compositions which surprisingly cure by both radiation and exposure to moisture without adverse interactions on deactivation reactions.
Nakanishi Junji
Yoshitake Makoto
Dow Corning Toray Silicone Company Ltd.
Gowling Lafleur Henderson Llp
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