Patent · US Expired

Flexible polyurethane foams

US6433034B1 · kind B1 · utility

5Cited by

9References

4Claims

0Family size

Assignee

IMPERIAL CHEMICAL INDUSTRIES LIMITED · GB

Inventors

Jan W. Leenslag · Neerijse, BE
Anthony Cunningham · Leefdaal, BE
Berend Eling · Ludwigshafen, DE

Key dates

Filing date	Nov 21, 2001
Grant date	Aug 13, 2002
Priority date	—
Expiry date	Nov 21, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S521/918
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Process for preparing a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions so as to prepare a rigid foam and by crushing the rigid foam so obtained. Flexible foams are obtained which do not show a major glass transition temperature between −100° C. and +25° C.

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