A polyolefine-polyacrylate based thermoplastic elastomer

Details A polyolefine-polyacrylate based thermoplastic elastomer A polyolefine-polyacrylate based thermoplastic elastomer

C - Chemistry, Metallurgy

08

F

C08F 255/02 (2006.01) C08F 2/44 (2006.01) C08F 255/00 (2006.01)

Patent

CA 2207975

A thermoplastic elastomer is achieved by absorbing an acrylate monomer, an initiator and eventually a diacrylate into polyolefine particles, after which the temperature is raised and the acrylate polymerises into the polyolefine and forms a dispersed phase, which has been functionalised by copolymerising a functional monomer together with the acrylate. As a compatibiliser a grafted polyolefin is used, which is melt-blended after the polymerisation into the thermoplastic elastomer or before the polymerisation into the polyolefine.

L'invention concerne un élastomère thermoplastique obtenu par absorption de monomère d'acrylate, d'un initiateur et, éventuellement, d'un diacrylate, dans des particules de polyoléfine; après élévation de la température, on obtient une polymérisation de l'acrylate dans la polyoléfine et la formation d'une phase dispersée, rendue fonctionnelle par copolymérisation d'un monomère fonctionnel et de l'acrylate. L'agent de compatibilité utilisé est une polyoléfine greffée, mélangée à l'état fondu après la polymérisation avec l'élastomère thermoplastique ou avant la polymérisation avec la polyoléfine.

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