Patent · US Expired

Dispersion polyols for hypersoft polyurethane foam

US6218444A · kind A · utility

11Cited by

7References

23Claims

0Family size

Assignee

Bayer Antwerpen · BE

Inventors

Stanely L. Hager · Cross Lanes, US
Jack R. Reese · Hurricane, US

Key dates

Filing date	Mar 6, 2000
Grant date	Apr 17, 2001
Priority date	—
Expiry date	Mar 6, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2110/0083
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Dispersion polyols which are liquid-liquid dispersions containing a first having a substantially Polyoxypropylene internal block having an equivalent weight in excess of about 700 Da and a high oxyethylene-content external block, and a second polyol which is a substantially polyoxyethylene polyol containing minimally 50 weight percent oxyethylene moieties. The dispersion polyols are stable and exhibit broad processing latitude when preparing hypersoft polyurethane foams. The dispersion polyols are advantageously prepared in situ, preferably in the presence of a double metal cyanide oxyalkylation catalyst.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.