Platinum complexes and light-activatable hydrosilylation...

Details Platinum complexes and light-activatable hydrosilylation... Platinum complexes and light-activatable hydrosilylation...

C - Chemistry, Metallurgy

07

F

C07F 15/00 (2006.01) B01J 31/22 (2006.01) C08K 5/00 (2006.01) C08L 83/04 (2006.01)

Patent

CA 2185824

Novel platinum-based organometallic complexes for use particularly as a hydrosilylation cross-linking catalyst for Si-H type polyorganosiloxanes (A) and aliphatically unsaturated and/or reactive-functional compounds (B). Said complexes are of formulae (Ia) and (Ib), wherein R?1¿=R?2¿=R?3¿=CH¿3?= and R?4¿=R?5¿=H. Light-cross-linkable compositions containing polyorganosiloxanes (A) and (B) and catalysts including the above-mentioned complexes are disclosed. The complexes are useful in a non-stick silicone coating for paper.

La présente invention concerne de nouveaux complexes organométalliques à base de platine utiles, notamment, comme catalyseur de réticulation par hydrosilylation de polyorganosiloxanes A de type Si-H et de composés B à insaturation aliphatique et/ou à fonction réactive. Ces complexes répondent aux formules (Ia) et (Ib) avec R1=R2=R3=CH3= et R4=R5=H. La présente invention concerne des compositions photoréticulables contenant les polyorganosiloxanes A et B et les catalyseurs comprenant les complexes ci-dessus. Application: enduction silicone anti-adhérente pour papier.

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