Patent · US Expired

Preparation of low-viscosity, isocyanurate and urethane group-containing polyisocyanate mixtures

US5369207A · kind A · utility

11Cited by

4References

20Claims

0Family size

Assignee

BASF SE

Inventors

Stefan Wolff · Sunnyvale, US
Hans Renz · Meckenheim, DE
Guenter Mohrhardt · Speyer, DE

Key dates

Filing date	Jul 12, 1993
Grant date	Nov 29, 1994
Priority date	—
Expiry date	Jul 12, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/798
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the preparation of isocyanurate and urethane group-containing and, if desired, uretdiode and allophanate group-containing polyisocyanate mixtures by partially cyclizing organic, preferably (cyclo)aliphatic diisocyanates, in the presence of trimerization catalysts, deactivating these catalysts, reacting the partially trimerized, isocyanurate and, if desired, uretdiode group-containing polyisocyanate mixture with 0.5 to 10 mol % of at least one aliphatic or cycloaliphatic alcohol and/or polyoxyalkylene alcohol, and separating off the monomeric diisocyanates.

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