Crosslinkable compositions and their use in the production...

C - Chemistry – Metallurgy – 08 – L

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C08L 83/07 (2006.01) B05D 5/08 (2006.01) C08L 83/06 (2006.01) C08L 83/08 (2006.01) C09D 183/06 (2006.01) C09D 183/07 (2006.01) C09D 183/08 (2006.01) D21H 27/00 (2006.01) D21H 19/32 (2006.01) D21H 27/06 (2006.01)

Patent

CA 2041262

Crosslinkable compositions containing (1) An organopolysiloxane having alkenyloxy functional groups and containing Si-bonded radicals Y of the formula -(CH2)2-R1-(A-R2)z-O-R3-CH=CH2, in which A represents -O-, -S- or Image group, R1 represents a straight-chain or branched alkylene radical having from 1 to 7 carbon atoms per radical or a cycloalkylene radical having from 5 to 7 carbon atoms per radical, R2 represents a straight-chain or branched alkylene radical having from 2 to 4 carbon atoms per radical, which can be substituted by a hydroxyl group, methoxy group, ethoxy group or trimethylsiloxy group, R3 represents a straight-chain or branched alkylene radical having from 1 to 7 carbon atoms per radical, and z is 0, 1 or 2, (2) an organopolysiloxane containing Si-bonded hydrogen atoms, and (3) a catalyst which promotes the addition of Si-bonded hydrogen to an aliphatic double bond.

Compositions réticulables renfermant : 1) un organopolysiloxane renfermant des groupes fonctionnels alcényloxy et des radicaux Y liés à Si, de formule -(CH2)2-R1-(A-R2)z-O-R3-CH=CH2, dans laquelle A représente -O-, -S- ou un groupe Image , R1 est un radical alcylène à chaîne droite ou ramifiée de 1 à 7 atomes de carbone, ou un radical cycloalcylène de 5 à 7 atomes de carbone par radical, R2 est un radical alcylène à chaîne droite ou ramifiée de 2 à 4 atomes de carbone par radical, avec ou sans substitution par un groupe hydroxyle, méthoxy, éthoxy ou triméthylsiloxy, R3 est un radical alcylène à chaîne droite ou ramifiée de 1 à 7 atomes de carbone par radical, et z est 0, 1 ou 2: 2) un organopolysiloxane renfermant des atomes d'hydrogène liés au Si; 3) un catalyseur qui facilite l'addition de l'hydrogène lié au Si à une double liaison aliphatique.

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