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. 28, 1999
Filed:
Apr. 03, 1998
Andrew M Thompson, Hurricane, WV (US);
Wolfgang Schmidt, West Chester, PA (US);
Donald F Rohr, Winfield, WV (US);
Jack R Reese, II, Cross Lanes, WV (US);
Mark R Kinkelaar, Glenmoore, PA (US);
Danny J Frich, Cross Lanes, WV (US);
Thomas P Farrell, Hockessin, DE (US);
Chiu Yan Chan, Wilmington, DE (US);
Robert W Beisner, Charleston, WV (US);
Lyondell Chemical Worldwide, Inc., Newtown, PA (US);
Abstract
Copolymer DMC-catalyzed polyoxypropylene polyols which exhibit processing latitude similar to base-catalyzed copolymer analogs and 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. Block copolymer polyols having external blocks containing lesser oxyethylene content than internal blocks and bicompositional compositions containing discrete multimodal and dissimilar and optionally multimodal polyols produced by a continuous addition of starter process are useful as polyols exhibiting greater processing latitude.