Composition and process for controlled radical...

C - Chemistry – Metallurgy – 08 – F

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C08F 293/00 (2006.01) B01J 27/24 (2006.01) C08F 2/46 (2006.01) C08F 4/00 (2006.01)

Patent

CA 2347676

The present invention relates to a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b1) at least one multifunctional triazinyl based 2,2,6,6, tetramethylpiperidine-1-oxyl and a free radical initiator or b2) at least one multifunctional triazinyl based 2,2,6,6, tetramethylpiperidine-1-oxyl-ether. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, the (co)polymers obtainable by this process and the use of multifunctional triazinyl based 2,2,6,6, tetramethylpiperidine-1-oxyls in combination with a free radical initiator, or a multifunctional triazinyl based 2,2,6,6, tetramethylpiperidine-1-oxyl-ethers for controlled polymerization. In a particularly preferred embodiment at least one additional heating step at a temperature from 140 to 280~C is applied after polymerization is completed.

La présente invention concerne une composition polymérisable comprenant a) au moins un monomère insaturé en éthylène et b1) au moins 2,2,6,6, tétraméthylpiperidine-1-oxyl à base de triazinyle multifonctionnel et un initiateur de radicaux libres, ou b2) au moins 2,2,6,6, tétraméthylpiperidine-1-oxyl-éther à base de triazinyle multifunctionel. D'autres aspects de l'invention concernent un processus de polymérisation de monomères non saturés en éthylène, les (co)polymères obtenus par ce processus, et l'utilisation de 2,2,6,6, tétraméthylpiperidine-1-oxyls à base de triazinyle multifonctionnel en association avec un initiateur de radicaux libres, ou de 2,2,6,6, tétraméthylpiperidine-1-oxyl-éthers à base de triazinyle multifonctionnel, en vue de réaliser une polymérisation contrôlée. Dans un mode de réalisation préféré, on réalise au moins une opération de chauffage supplémentaire à une température comprise entre 140 et 280 ·C après l'achèvement de la polymérisation.

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