The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 1993
Filed:
Jan. 28, 1992
Mitsubishi Petrochemical Company Limited, Tokyo, JP;
Abstract
A process for preparing an ethylene polymer which comprises polymerization of ethylene or ethylene and an .alpha.-olefin having 3 to 10 carbon atoms over a catalyst comprising the following components (A) and (B): (A) which is a solid component for a Ziegler catalyst obtained by bringing (2) into contact with (1) and bringing the contact product into contact with (3) and (4) wherein (1) is a solid catalyst component comprising (i)-(iii) where (i): MgX.sub.2, (ii): titanium tetraalkoxide and/or a polytitanate ester, (iii): a polymeric silicon compound, having a formula of ##STR1## R.sup.1 being a hydrocarbyl group, (2) is a halogenated Si compound; (3) is a halohydrocarbon; (4) is an organo-Al compound; and (B) is an organo-Al compound. An ethylene polymer having a moderately broad molecular weight distribution can be prepared in a high activity by use of the catalyst. The ethylene polymer is suited for the production of fibers or tapes.