Modification of (co)polymers with cyclic ketone peroxides

Details Modification of (co)polymers with cyclic ketone peroxides Modification of (co)polymers with cyclic ketone peroxides

C - Chemistry, Metallurgy

08

F

C08F 8/50 (2006.01) C08C 19/08 (2006.01) C08K 5/14 (2006.01)

Patent

CA 2195545

A process for the modification of (co)polymers employing an organic peroxide comprising the step of contacting a (co)polymer with organic peroxide under conditions whereby at least some of said organic peroxide is decomposed, is disclosed. The process is characterized in that at least 20 % of the fatal active oxygen content of said organic peroxide is attributable to one or more cyclic ketone peroxides. In a second aspect, the invention relates to the use of an organic peroxide composition wherein at least 20 % of the total active oxygen content is contributed by one or more cyllic ketone peroxide(s) modify (co)polymers. It has been found that these cyclic ketone peroxides are extremely efficient in (co)polymer modification processes.

L'invention concerne un procédé de modification de copolymèrs à l'aide d'un peroxyde organique consistant à mettre un copolymère en contact avec un peroxyde organique dans des conditions dans lesquelles une partie au moins dudit peroxyde organique est décomposée. Le procédé est caractérisé en ce qu'au moins 20 % de la teneur totale en oxygène actif dudit peroxyde provient d'un ou plusieurs peroxydes de cétone cycliques. Selon un deuxième aspect, l'invention se rapporte à l'utilisation d'une composition à base de peroxyde organique selon laquelle 20 % au moins de la teneur totale en oxygène actif est apporté par un ou plusieurs peroxyde(s) de cétone cyclique(s) destinés à modifier des polymères. On a découvert que ces peroxydes de cétone cycliques sont très efficaces lorsqu'ils sont employés dans des procédés de modification de copolymères.

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