Coarse-grained polyolefin, its production method and a catalyst

Details Coarse-grained polyolefin, its production method and a catalyst Coarse-grained polyolefin, its production method and a catalyst

1995-06-06

1998-06-16

Nagumo, Mark

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5261253, 5261256, 526351, 502107, 502127, C08F 4654

Patent

active

057672156

ABSTRACT:
The invention relates to a method for preparing polyolefins. In the polymerization, a procatalyst composition is being used, which has been prepared by contacting MgCl.sub.2, a lower alcohol, a titanium compound and a phthalic acid ester. The polyolefin is given the adequate coarseness by using a procatalyst of the said type, which has been prepared by carrying out a transesterification between the lower alcohol and the phthalic acid ester and by selecting dioctyl phthalate (DOP) as phthalic acid ester.

REFERENCES:
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patent: 4732882 (1988-03-01), Allen et al.
patent: 4778870 (1988-10-01), Kohyama et al.
patent: 4931526 (1990-06-01), Yoshitake et al.
patent: 4952649 (1990-08-01), Kioka et al.
patent: 4990478 (1991-02-01), Hoppin et al.
patent: 5234879 (1993-08-01), Garoff et al.
patent: 5360776 (1994-11-01), Iiskola et al.
WPAT Accession No. 89-306590/42 (1989).

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