Ethylene-propylene copolymer and method for manufacturing...

Details Ethylene-propylene copolymer and method for manufacturing... Ethylene-propylene copolymer and method for manufacturing...

C - Chemistry, Metallurgy

08

F

C08F 4/642 (2006.01) C08F 210/16 (2006.01) C08F 210/18 (2006.01)

Patent

CA 2158464

The present invention is related to an elastomeric produced from ethylene. propylene and optionally diolefin, said copolymer having a weight-average molecular weight Mw of 10 000 - 250 000 g/mol, intrinsic viscosity of 0.8 - 4.0 dlg, and an ethylene unit content of 65 - 95 wt.%, preferably 80 - 90 wt.%, in said copolymer, and said copolymer further having a homogeneous comonomer unit distribution, whereby the product is free from blocks formed by ethylene homopolymer in the copolymer. The Random Index value characterizing this property is approx. 50 - 90. The invention further concerns a method for producing said copolymer using a catalyst system formed by an alkadiene-metallocene compound and an alumoxane compound in a slurry phase containing either liquid propene or a hydrocarbon, or alternatively, in gas phase, at a temperature of 0 - 100°C, preferably 10 - 50 °C. The copolymer thus produced is elastomeric yet easy flowing, easily melt-workable, and soluble in hydrocarbon solvents or swelling in hydrocarbons.

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