Patent · US Expired

Stable polyisocyanate copositions obtainable by phosgene-free methods and their preparation

US5808138A · kind A · utility

4Cited by

14References

4Claims

0Family size

Assignee

BASF SE

Inventors

Gerhard Laqua · Mutterstadt, DE
Bernd Bruchmann · Ludwigshafen, DE
Stefan Wolff · Sunnyvale, US

Key dates

Filing date	Nov 21, 1995
Grant date	Sep 15, 1998
Priority date	—
Expiry date	Nov 21, 2015

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/14
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Stable (cyclo)aliphatic polyisocyanate compositions obtainable by phosgene-free methods, preferably by thermal cleavage of (cyclo)aliphatic polycarbamates, are stabilized with carbon dioxide, advantageously in an amount of up to 0.3% by weight.

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