Addition polymerisation

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 2/04 (2006.01) C08F 2/00 (2006.01) C08F 18/20 (2006.01)

Patent

CA 2335484

A method of producing a polymer comprises the steps of forming a homogeneous reaction mixture comprising at least one addition polymerisable monomer, a supercritical fluid, and a stabiliser, wherein the stabiliser comprises a chain which is soluble in the supercritical fluid and a functional end-group which is not polymerisable by a free-radical mechanism, and polymerising said at least one monomer in the reaction mixture. In a preferred system for polymerising acrylic monomers, the fluid comprises supercritical carbon dioxide and the stabiliser comprises an acid-functionalised perfluoropolyether.

On décrit un procédé de production d'un polymère, qui consiste à former un mélange réactionnel homogène contenant au moins un monomère polymérisable par addition, un fluide supercritique et un stabilisant, ledit stabilisant comprenant une chaîne soluble dans le fluide supercritique et un groupe terminal fonctionnel ne se prêtant pas à une polymérisation radicalaire, puis à polymériser ledit monomère dans le mélange réactionnel. Dans un système préféré de polymérisation de monomères acryliques, le fluide et le stabilisant contiennent respectivement un dioxyde de carbone supercritique et un perfluoropolyéther à fonction acide.

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