Patent · US Expired

Process for the preparation of flexible polyurethane foams employing polyester-polyether polyol mixtures

US4374935A · kind A · utility

19Cited by

4References

7Claims

0Family size

Assignee

BASF SE

Inventors

Walter Decker · Ludwigshafen, DE
Ernst Schoen · Diepholz, DE
Herbert Grabhoefer · Ludwigshafen, DE
Peter Weyland

Key dates

Filing date	Jan 4, 1982
Grant date	Feb 22, 1983
Priority date	—
Expiry date	Jan 4, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S521/914
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention concerns a process for the preparation of flexible polyurethane foams having good hydrolytic stability, improved damping, with equal or higher levels of other physical properties and with a high absorption capacity. The foams are prepared by reacting organic polyisocyanates and mixtures of PA0 (a) liquid polyester polyols, which are produced by the polycondensation of organic dicarboxcylic acid and a polyol mixture which contains 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and at least one triol, and PA0 (b) di- to tetra-functional polyether polyols having molecular weights of 1500 to 6000 in the presence of catalysts and blowing agents as well as optionally chain extenders, auxiliaries, and additives.

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