Soluble organopolysiloxane free-radical macroinitiators for...

Details Soluble organopolysiloxane free-radical macroinitiators for... Soluble organopolysiloxane free-radical macroinitiators for...

C - Chemistry, Metallurgy

08

G

C08G 77/04 (2006.01) C08F 283/12 (2006.01) C08G 77/48 (2006.01)

Patent

CA 2138934

The invention relates to partially crosslinked organopoly-siloxanes which contain a radical forming group, a base-catalyzed process for their preparation, graft copolymers produced from these organopolysiloxanes and a process for the preparation of the graft copolymers. The present invention avoids problems related to known methods wherein a considerable portion of the organo-polymer chains do not graft to the organopolysiloxane graft back-bone but remain as an unattached homopolymers.

L'invention a trait à des organopolysiloxanes partiellement réticulés qui contiennent un groupement formant un radical, à leur processus de préparation avec une base comme catalyseur, aux copolymères greffés produits à partir de ces organopolysiloxanes et au processus de préparation des copolymères greffés. L'invention évite les problèmes liés aux méthodes connues dans lesquelles une portion considérable des chaînes organo-polymères ne se fixe pas au support de greffage avec l'organopolysiloxane, mais demeure sous forme de homopolymères non liés.

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