Patent · US Expired

Method for preparing a flexible polyurethane foam

US4997858A · kind A · utility

25Cited by

3References

17Claims

0Family size

Assignee

RECTICEL · BE

Inventors

Lucien Jourquin · Wetteren, BE
Eddie Du Prez · Zottegem, BE
Patrick Demeyer · Evergem, BE
Rudi Mortelmans · Steendorp, BE

Key dates

Filing date	Apr 14, 1989
Grant date	Mar 5, 1991
Priority date	—
Expiry date	Apr 14, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S521/905
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method for preparing a flexible polyurethane foam, wherein a polyether-polyol having an average molecular weight from 1000 to 8000 and an average functionality not larger than 4, is brought into reaction with an organic polyisocyanate in the presence of a foam stabilizer, a catalyst and blowing agent comprising methylformate, wherein a cross-linker/extender and/or amine catalyst with delayed action is added to said reaction mixture.

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