C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/00 (2006.01) C08F 4/00 (2006.01)
Patent
CA 2504619
The invention concerns a cationic catalysis system comprising an initiator (I), a catalyst (K) and a cocatalyst (CoK). The cocatalyst (CoK) is an agent releasing the active polymerizing center of its counter-anion generated by the reaction between the catalyst (K) and the initiator (I). Said cocatalyst is characterized by the existence of a double bond electron-depleted by an electroattractive group. It is selected for example from the group consisting of the following complexing agents including o-chloranyl (3, 4, 5, 6-tetrachloro-1,2-benzoquinone), p-chloranyl (2, 3, 5, 6-tetrachloro--1,4-benzoquinone), nitrobenzene, trinitrobenzene or tetracyanoethylene.
L'invention a pour objet un système de catalyse cationique comprenant un initiateur (I), un catalyseur (K) et un co-catalyseur (CoK). Le co-catalyseur (CoK) est un agent libérant le centre actif de polymérisation de son contre- anion généré par la réaction entre le catalyseur (K) et l'initiateur (I). Ce co-catalyseur se caractérise par l'existence d'une double liaison appauvrie en électron par un groupement électro~attracteur. Il est pris par exemple dans le groupe de complexants suivants comprenant l'o-chloranyl (3, 4, 5, 6- tétrachloro-l,2-benzoquinone), le p-chloranyl (2, 3, 5, 6-tétrachloro-~1,4- benzoquinone), le nitrobenzène, le trinitrobenzène ou le tétracyanoéthylène.
Le Guillaume
Linemann Reinhard
Arkema
Robic
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