Method for the production of a low density polyethylene

Details Method for the production of a low density polyethylene Method for the production of a low density polyethylene

C - Chemistry, Metallurgy

08

F

402/611, 402/643

C08F 210/02 (2006.01) C08F 4/02 (2006.01) C08F 4/64 (2006.01) C08F 210/16 (2006.01) C08F 297/08 (2006.01)

Patent

CA 1085096

ABSTRACT OF THE DISCLOSURE: In producing a low density polyethylene by copolymerization in slurry state of ethylene and an .alpha.-olefin with use of a catalyst consisting of a supported titanium component and an organoaluminum compound, a certain amount of ethylene is subject to pre-polymerization in the presence of said catalyst prior to the copolymerization. Successively, the copolymerization of ethylene and an .alpha.-olefin is effected in a two-step process, in which a copolymerization ratio of .alpha.-olefin to ethylene is kept at a low level in the first step and raised to a high level in the second step thereby to obtain a low density polyethylene having a density of not higher than 0.943 g/cm3.

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