Method for production of ethylene - propylene copolymer rubber.

摘要

A method is provided for production an ethylene-propylene copolymer rubber in the presence of a polymerization catalyst composed of a component (X) obtained by contacting a metal oxide with a magnesium compound (R<1>MgR<2>) and subsequently contacting the resulting product with a titanium compound or optionally first with an alcohol or a silicon compound (SiR<3>nR<4>4-n) prior to contacting with the titanium compound and a component (Y) which is an organoaluminum compound. In the magnesium and silicon compounds, R<1> and R<3> represent a hydrocarbyl or hydrocarbyloxy group and R<2> and R<4> represent a hydrocarbyl or hydrocarbyloxy group or a halogen atom and n represents an integer having a value of 1 to 3.