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. 23, 2000
Filed:
Apr. 03, 1998
Robert W Beisner, Charleston, WV (US);
Chiu Yan Chan, Wilmington, DE (US);
Thomas P Farrell, Hockessin, DE (US);
Danny J Frich, Cross Lanes, WV (US);
Mark R Kinkelaar, Glenmoore, PA (US);
Jack R Reese, II, Cross Lanes, WV (US);
Donald F Rohr, Winfield, WV (US);
Wolfgang Schmidt, West Chester, PA (US);
Andrew M Thompson, Hurricane, WV (US);
Lyondell Chemical Worldwide, Inc., Newton Square, PA (US);
Abstract
Copolymer DMC-catalyzed polyoxypropylene polyols which exhibit processing latitude similar to base-catalyzed copolymer analogs and base-catalyzed homopolyoxypropylene analogs may be prepared by oxyalkylation with a mixture of propylene oxide and ethylene oxide such that a finite ethylene oxide content is maintained in the oxyalkylation reactor for the most substantial part of the oxyalkylation, the polyoxypropylene polyol having randomly distributed oxyethylene moieties which constitute 1.5 weight percent or more of the polyol product.