Silane, free radical generator, amine blends for...

C - Chemistry – Metallurgy – 08 – K

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C08K 5/00 (2006.01) C08J 3/24 (2006.01) C08K 5/3435 (2006.01) C08K 5/54 (2006.01) C08K 5/5425 (2006.01)

Patent

CA 2212944

A composition for crosslinking olefin polymers including an olefinically unsaturated alkoxysilane, a free radical generator, and an organic hindered amine light stabilizer compound, together with a process for crosslinking olefin polymers comprising blending said composition with an olefinic polymer, allowing the silane to graft to the polymer, and causing the grafted polymer to crosslink, preferably by subjecting it to moisture in the presence of a hydrolysis/condensation catalyst.

L'invention concerne une composition pour réticuler des polymères oléfiniques, comprenant un alcoxysilane oléfiniquement insaturé, un générateur de radicaux libres et une amine organique à fort encombrement stérique servant d'agent de protection contre la lumière. L'invention concerne également un procédé pour réticuler des polymères oléfiniques consistant à mélanger la composition en question avec un polymère oléfinique, à permettre au silane de se greffer sur le polymère et à provoquer la réticulation du polymère greffé, de préférence en l'exposant à de l'humidité, en présence d'un catalyseur d'hydrolyse/de condensation.

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