Interpolymer cures of blends comprising halogenated...

Details Interpolymer cures of blends comprising halogenated... Interpolymer cures of blends comprising halogenated...

C - Chemistry, Metallurgy

08

L

C08L 9/00 (2006.01) C08J 3/24 (2006.01) C08K 5/098 (2006.01) C08L 21/00 (2006.01) C08L 23/28 (2006.01)

Patent

CA 2218082

Vulcanizable blends containing a halogenated copolymer of a C4-C7 isomonoolefin and para-alkylstyrene mixed with one or more olefinically unsaturated elastomeric polymers are disclosed. Cure is preferably effected using zinc stearate as a curative at levels below about 3.0 phr which gives rise to vulcanizates having selective interpolymer addition of benzylic halogen present in the halogenated copolymer to the double bond of the unsaturated polymer with no significant self curing of the halogenated polymer taking place.

Mélanges vulcanisables contenant un copolymère halogéné constitué d'une isomonooléfine C¿4?-C¿7? et de para-alkylstyrène mélangés à un ou plusieurs polymères élastomères oléfiniquement insaturés. La vulcanisation s'effectue de préférence à l'aide de stéarate de zinc utilisé comme agent vulcanisant à des niveaux inférieurs à environ 3,0 phr pour produire des vulcanisats présentant une addition de copolymérisat sélective, constituée d'halogène benzylique, présente dans la double liaison du polymère insaturé, sans durcissement naturel significatif du polymère halogéné.

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