Patent · US Expired

Process for the preparation of polyurethane (urea) masses which contain foam

US5075345A · kind A · utility

5Cited by

4References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Eduard Mayer · Dormagen, DE
Manfred Dietrich · Leverkusen, DE
Walter Meckel · Neuss, DE

Key dates

Filing date	Dec 11, 1990
Grant date	Dec 24, 1991
Priority date	—
Expiry date	Dec 11, 2010

Classification

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

Abstract

The present invention is directed to a process for the preparation of foam-containing polyurethane (urea) masses comprising reacting an isocyanate prepolymer containing cation groups with water in the presence of fillers. The isocyanate prepolymer is prepared by first i) reacting a polyisocyanate with a first polyol which contains partly or completely quaternized tertiary nitrogen, said polyol being prepared by reacting a tertiary amine containing compound with from 3 to 8 moles of propylene oxide per mol of nitrogen to thereby form a semi-isocyanate prepolymer and then ii) reacting said semi-isocyanate prepolymer with a second polyol different from said first polyol, to form said isocyanate prepolymer.

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