Molded and slab polyurethane foam prepared from double metal cyanide complex-catalyzed polyoxyalkylene polyols and polyols suitable for the preparation thereof

US6008263A · kind A · utility

Assignee

• Lyondell Chemical Worldwide, Inc. · US

Inventors

• Andrew Thompson · West Chester, US
• Wolfgang Schmidt · Frankfurt, DE
• Donald Frank Rohr · Winfield, US
• Jack R. Reese · Hurricane, US
• Mark Kinkelaar · Cross Lanes, US
• Danny J. Frich · Cross Lanes, US
• Thomas Farrell · Marlborough, US
• Chiu Y. Chan · Wilmington, US
• Robert W. Beisner · Charleston, US

Key dates

• Filing date: Apr 3, 1998
• Grant date: Dec 28, 1999
• Expiry date: Apr 3, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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.