Process for producing copolymer of ethylene

Details Process for producing copolymer of ethylene Process for producing copolymer of ethylene

C - Chemistry, Metallurgy

08

F

402/644

C08F 4/42 (2006.01) C08F 210/02 (2006.01)

Patent

CA 1158000

ABSTRACT OF THE DISCLOSURE: A copolymer of ethylene and a C4 - C10 .alpha.-olefin at a content of 0.5 to 10 mol % is produced by forming a polymerization catalyst system by reacting a Grignard reagent with a chain or cyclic hydropolysiloxane having the unit Image (R1 represents an alkyl, aryl, aralkyl, alkoxy or aryloxy group; a is 0, 1 or 2; b is 1, 2 or 3 and a + b?3), to form a reaction product (a); reacting the reaction product (a) with at least one compound having the formula Image (R2 represents a C1 to C12 hydrocarbon moiety; M represents Al or Si; z represents atomic value of 3 or 4; X represents a halogen atom; n is 0, 1 ... (z - 1)) in the presence of an aromatic hydrocarbon solvent at lower than 85°C to form a reaction product (b); and reacting the reaction product (b) with at least one titanium halide in the presence of an organic acid ester (c) to obtain a solid catalytic component (A) and adding an organoaluminum compound (B) and then, polymerizing ethylene and a C4 - C10 .alpha.-olefin in the presence of a catalytic amount of the polymeri- zation catalyst system in an inert hydrocarbon solvent or in a liquid form of the C4 - C10 .alpha.-olefin in which ethylene is dissolved.

392909

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