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:
Nov. 21, 2000
Filed:
Mar. 19, 1999
Zhaozhong Jiang, Thorofare, NJ (US);
Gregory S Long, State College, PA (US);
Shahid Murtuza, Chicago, IL (US);
Ayusman Sen, State College, PA (US);
Suzanne E Schramm, Glen Mills, PA (US);
Jeffrey C Trewella, Kennett Square, PA (US);
Mobil Oil Corporation, Fairfax, VA (US);
The Pennsylvania University, University Park, PA (US);
Abstract
The novel synthetic polyethylene fluids of the present invention are characterized by high viscosity indices (about 94-151 VI), low pour points (about -60 to -10.degree. C.), and a kinematic viscosity of about 6 to 28 cSt KV at 100.degree. C. The product compositions comprise polymers having a molecular weight of from about 300 to 30,000 and a high branching index of 151 to 586 branches per 1000 CH.sub.2 groups, or BI=0.18-0.40, wherein the polymer is substantially free of methyl branches. Highly-branched polyethylene fluids that have less than 5 methyl branches per 1000 CH.sub.2 groups are prepared by polymerizing ethylene in the presence of a catalyst system consisting of [C] and [B], wherein [C] is a catalyst having the empirical formula MX.sub.4 and [B] is a co-catalyst having the empirical formula R.sub.n AlX.sub.3-n, where M is a Group IVB transition metal, X is a halogen anion, R is a C.sub.1 -C.sub.20 alkyl group, and n is 1-2, in the presence of a promoter, wherein the promoter is selected from the group consisting of hydrogen or a Lewis acid such as, for example, FeCl.sub.3, AlCl.sub.3, or mixtures thereof.