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. 01, 2001
Filed:
Oct. 15, 1998
Willie C. Burton, Naugatuck, CT (US);
Xu Wu Feng, Bethany, CT (US);
Daniel Gillis, Claymont, DE (US);
Uniroyal Chemical Company, Inc., Middlebury, CT (US);
Abstract
A polyolefin elastomer possessing a unique combination of properties, i.e., high molecular weight (M,), high Mooney viscosity (ML,at 125° C.), low polydispersity index (M,/M,) and low glass transition temperature (T,), is obtained by a polymerization process employing a particular type of a metallocene catalyst. The polyolefin elastomer is useful for manufacturing a variety of products including rubber articles such as hoses, belts and moldings, polymer blends containing one or more other hydrocarbon polymers and lubricating oils in which the elastomer functions as a viscosity modifier. Also disclosed is a cocatalyst for activating the metallocene procatalyst employing a specific molar ratio of the components of the cocatalyst to the transition metal of the procatalyst.