Process for preparing polyolefin

Details Process for preparing polyolefin Process for preparing polyolefin

1977-07-25

1985-03-26

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502116, 526125, 526127, 526351, C08F 402, C08F 1006

Patent

active

045074500

ABSTRACT:
In a process for preparing polyolefin by polymerizing an olefin in the presence of a catalyst system combining an organo-aluminum compound and a titanium containing solid catalytic component prepared by mixing (a) a silanol compound (b) a Grignard reagent and (c) a titanium tetrahalide, the components (a) (b) or (c) or the reaction mixture of two or three components thereof is contacted with (d) one or more electron donor selected from the group consisting of amines, carboxylic acid amides, phosphines, phosphine oxides, phosphoric esters, phosphorous esters, phosphoric acid amides, ketones and carboxylic esters. The polyolefin having high isotactic index can be obtained.

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patent: 4221894 (1980-09-01), Ushida et al.
patent: 4250285 (1981-02-01), Minami et al.

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