Polymerization catalyst and process for preparing an ethylene po

Details Polymerization catalyst and process for preparing an ethylene po Polymerization catalyst and process for preparing an ethylene po

1999-05-13

2000-06-27

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5261247, 526153, 526904, 502115, 502125, C08F11002

Patent

active

060808284

ABSTRACT:
An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches, a high melt tension and a high swell ratio, and a process for preparing the ethylene polymer are disclosed. A solid titanium catalyst component obtained by initially bringing a solid titanium composite which is obtained by the contact of a solid magnesium aluminum composite containing magnesium, halogen, aluminum, and an alkoxy group of 6 or more carbon atoms and/or alcohol of 6 or more carbon atoms with a tetravalent titanium compound into contact with an organometallic compound, and then bringing the resulting product into contact with oxygen is further disclosed. An ethylene polymerization catalyst comprising the above catalyst component and an organometallic compound catalyst component is furthermore disclosed. Therefore, the ethylene polymer is excellent in moldability, and a molded article obtained therefrom is excellent in rigidity and impact resistance and free from poor appearance.

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patent: 5155078 (1992-10-01), Kioka et al.
patent: 5180702 (1993-01-01), Pettijohn

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