Patent · US Expired

Viscoelastic polyurethane foams

US6391935B1 · kind B1 · utility

56Cited by

14References

29Claims

0Family size

Assignee

Bayer Antwerpen · BE

Inventors

Stanley L. Hager · Cross Lanes, US
Veril C. Jividen · Scott Depot, US
Sebastien Triouleyre
Faouzi Joulak · Persan, FR

Key dates

Filing date	Jan 31, 2000
Grant date	May 21, 2002
Priority date	—
Expiry date	Jan 31, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/283
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Viscoelastic foams and a process for making them are disclosed. The foams are produced with a unique isocyanate-reactive mixture that includes a low equivalent weight polyol and from about 15 to about 70 wt. % of a polyester or polyoxyalkylene monol having a number average equivalent weight greater than about 1000. The monol is the key to formulating excellent viscoelastic foams over a broad range of processing conditions and isocyanate indices. A “reactive” monol gives TDI-based viscoelastic foams with improved “hand feel” and reduced levels of residual toluenediamines.

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