Patent · US Expired

Use of N-(aminoalkyl) pyrrolidines as catalysts for the polyisocyanate polyaddition process

US5134217A · kind A · utility

7Cited by

5References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Richard Weider · Leverkusen, DE
Uwe Scholz · Hanerau-Hademarschen, DE

Key dates

Filing date	Jan 6, 1992
Grant date	Jul 28, 1992
Priority date	—
Expiry date	Jan 6, 2012

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2290/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing polyisocyanate polyaddition products by reacting PA1 (a) polyisocyanates with PA1 (b) relatively high molecular weight compounds containing at least two isocyanate-reactive hydrogen atoms and PA1 (c) chain-extending agents, in the presence of PA1 (d) N-(aminoalkyl)pyrrolidine catalysts corresponding to formula (I) ##STR1## in which R is a C.sub.2-12 alkylene group (optionally containing O or N atoms but not isocyanate-reactive groups) and PA2 R' is hydrogen or a C.sub.1-4 alkyl group, PA1 (e) optionally, other known catalysts, and PA1 (f) other known additives.

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