Process for preparation of olefin polymers

Details Process for preparation of olefin polymers Process for preparation of olefin polymers

1991-06-07

1992-08-11

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502125, 526125, 526351, C08F 4654, C08F 4656

Patent

active

051379953

ABSTRACT:
A process for the preparation of olefin polymers, which comprises polymerizing an olefin in the presence of a catalyst which comprises: (A) a solid catalyst component obtained by contacting a magnesium dihalide such as MgCl.sub.2 with a titanium tetra-alkoxide such as Ti(O-nBu).sub.4 and then with a polymeric silicon compound having a structure represented by the formula ##STR1## wherein R stands for a hydrocarbon residue such as CH.sub.3, and contacting the obtained solid component with a halogen compound of silicon such as SiCl.sub.4 or with a halogen compound of silicon such as SiCl.sub.4 and a halogen compound of titanium such as TiCl.sub.4, (B) an organoaluminum compound such as Al(Et).sub.3 ; and (C) an organic silicon compound having an Si--O--C linkage such as PhSi(OEt).sub.3. According to this process, a polymer having a high stereoregularity, a narrow particle size distribution and a high bulk density can be obtained in a high yield with a high efficiency.

REFERENCES:
patent: 4399055 (1983-08-01), Matsuura et al.
patent: 4550094 (1985-10-01), Hanji et al.
patent: 4563436 (1986-01-01), Yokoyama et al.
patent: 4565798 (1986-01-01), Yamamoto et al.
patent: 4581426 (1986-04-01), Asanuma et al.

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