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. 26, 1998
Filed:
Oct. 02, 1996
Nippon Oil Company, Limited, Tokyo, JP;
Abstract
A polyethylene article such as film or fiber having high strength and high elastic modulus is produced by orienting an ultra-high molecular weight polyethylene having an intrinsic viscosity at 135.degree. C. in decalin of 5 to 50 dl/g, said ultra-high molecular weight polyethylene being prepared by homo- or copolymerizing ethylene in the presence of a catalyst system and hydrogen, said catalyst system comprising (1) a solid catalyst component containing at least magnesium, titanium and/or vanadium, (2) an organometallic compound and (3) a compound represented by the following general formula �I!: ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen or a hydrocarbon residue, with the proviso that any two of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may conjointly form a cyclic hydrocarbon residue.