Stabilised polymers and their preparation

Details Stabilised polymers and their preparation Stabilised polymers and their preparation

C - Chemistry, Metallurgy

08

L

400/4909, 400/64

C08L 57/00 (2006.01) C08L 23/02 (2006.01) C08L 47/00 (2006.01)

Patent

CA 2034515

ABSTRACT OF THE DISCLOSURE STABILIZED POLYMERS AND THEIR PREPARATION Oxidatively stabilized polyolefin polymers containing an antioxidant are made more resistant to loss of antioxidant by converting at least some of the antioxidant comprising a polymer of dicyclopentadiene and a phenolic compound into a form non extractable with cyclohexane. The conversion is preferably by reaction in the melt phase in the presence of a radical initiator. Addition of organotin esters, sulphides, oxides or thioethers reduces the colour.

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