Patent · US Expired

Process for the preparation of low-density flexible polyurethane foams

US5145882A · kind A · utility

4Cited by

7References

12Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Reinhard Samaritter · Leverkusen, DE
Peter Gansen · Selters (Westerwald), DE
Klaus Seel · Cologne, DE

Key dates

Filing date	May 28, 1991
Grant date	Sep 8, 1992
Priority date	—
Expiry date	May 28, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2375/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for the preparation of low-density flexible polyurethane foams comprising reacting, in a closed mold, a mixture comprising polyisocyanates; compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range from about 400 to about 10,000; water as blowing agent; optionally, compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range from 32 to 399 as chain-extending and crosslinking agents; and optionally, one or more known auxiliaries and additives, wherein one or more of the reaction mixture components is heated before foaming to a temperature of at least 40.degree. C.

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