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:
Dec. 03, 2002
Filed:
Sep. 25, 2000
Applicant:
Inventors:
Edward Quentin Clutton, Edinburgh, GB;
Philip Stephen Hope, Alva, GB;
Assignee:
BP Chemicals Limited, London, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F 4/42 ;
U.S. Cl.
CPC ...
C08F / ; C08F 4/42 ;
Abstract
Polyethylenes are prepared having a density in the range 900-980 kg/m and a weight average molecular weight ≧375,000 characterized by a fracture toughness at −40° C. >20 kJ/m and a dynamic viscosity of <3000 Pa.s at 100 rad/sec. The polymers also having a die swell of 10-80% and show a desirable combination of physical and processing properties. The polymers are prepared by the use of catalysts comprising a metallocene component and a Ziegler component.