Elastomeric copolymer

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 210/16 (2006.01) C08F 4/62 (2006.01) C08F 210/18 (2006.01) C08L 23/16 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 2225742

The invention relates to an elastomeric copolymer comprising 25-85 wt.% of ethylene, 15-75 wt.% of .alpha.-olefine and optionally up to 20 wt.% of diene. It is characterized in that the copolymer has a Uniform Branching Coefficient, UBC, which satisfies the relation (a). The invention also relates to a process for the preparation of such an elastomeric copolymer. In this process a catalyst having a reactivity factor RF < 10 is used.

Copolymère élastomère comportant de 25 à 85 % en poids d'éthylène, de 15 à 75 % en poids d'une .alpha.-oléfine, et éventuellement jusqu'à 20 % en poids de diène. Ce copolymère est caractérisé en ce qu'il présente un coefficient de ramification constant (UBC) qui satisfait la relation (a). L'invention concerne également un procédé de préparation d'un tel copolymère élastomère, consistant à utiliser un catalyseur dont le facteur de réactivité est inférieur à 10.

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