Light-crosslinkable polysiloxanes

Details Light-crosslinkable polysiloxanes Light-crosslinkable polysiloxanes

C - Chemistry, Metallurgy

07

F

402/14, 260/306

C07F 7/10 (2006.01) C07F 7/08 (2006.01) C08G 77/26 (2006.01) C08G 77/388 (2006.01) C09D 183/08 (2006.01) G03F 7/075 (2006.01)

Patent

CA 1192204

Abstract of the Disclosure The invention relates to novel light-crosslinkable poly- siloxanes having an average molecular weight of 750 to 1.500.000 and consisting of 10 to 100 mole % of recurring structural units of the formula I (I) Image and of 0 to 90 mole % of recurring structural units of the formula Image , such that each molecule contains on average at least three structural units of the formula I in which formula: A represents a -CpH2p- radical in which p is 2 to 10, the main chain of which radical may be interrupted by -O-, -NH-, or -NH-C1-C4 alkyl; R1 is hydrogen, methyl, phenyl or vinyl; R2 is methyl or phenyl, and each of R3 and R4 independently of the other is C1-C4 alkyl, or together they are trimethylene or tetramethylene, each unsubstitu- ted or substituted by a methyl group. These polysiloxanes are suitable e.g. for making moulded articles, photosensitive resists, electrical insulating materials, films, finishes and coatings, if desired in admixture with compounds of the formula X (X) Image in which z is 1 to 20,000, and A, R1, R2, R3, and R4 are as defined above.

412495

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