Patent · US Expired

Diphenylmethane diisocyanate-based liquid polyisocyanate mixtures containing urethane groups, process for their preparation and their use for the preparation of flexible polyurethane foams

US4478960A · kind A · utility

46Cited by

11References

6Claims

0Family size

Assignee

BASF SE

Inventors

Ingolf Buethe · Haßloch, DE
Matthias Marx · Fürstenfeldbruck, DE
Gisbert Schleier · Heidelberg, DE
Reinhard Peters · Munich, DE

Key dates

Filing date	Oct 21, 1983
Grant date	Oct 23, 1984
Priority date	—
Expiry date	Oct 21, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2110/0058
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Diphenylmethane diisocyanate-based liquid polyisocyanate mixtures containing urethane groups and having an isocyanate content of from 12 to 30 percent by weight are obtained by reaction of a polyoxypropylene polyoxyethylene polyol containing 5 to 30 percent by weight of oxyethylene with diphenylmethane diisocyanate-based isocyanates. These polyisocyanate mixtures are storage stable at low temperature and yield flexible polyurethane foams having improved mechanical properties.

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