Patent · US Expired

Process for the preparation of elastic flexible polyurethane foams

US4421872A · kind A · utility

7Cited by

8References

8Claims

0Family size

Assignee

BASF SE

Inventors

Ingolf Buethe · Haßloch, DE
Wolfgang Straehle · Heidelberg, DE
Matthias Marx · Fürstenfeldbruck, DE
Reinhard Peters · Munich, DE

Key dates

Filing date	Sep 2, 1982
Grant date	Dec 20, 1983
Priority date	—
Expiry date	Sep 2, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2110/0083
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

For the preparation of elastic flexible polyurethane foams with improved breaking elongation and very good setting behavior as well as densities from 7 to 120 grams per liter, organic polyisocyanates are reacted in the presence of blowing agents, catalysts and, optionally, auxiliaries and/or additives with polyols based on polyoxyalkylene polyols having terminal oxyethylene blocks of a degree of oxyethylation of 1 to 13 and which have a content of primary hydroxyl groups at the corresponding degree of oxyethylation equal or exceeding the value of curve A in the Figure in which curve A describing the relationship of the content of primary hydroxyl groups with the degree of oxyethylation.

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