Patent · US Expired

Process for the preparation of polyurethane-polyisocyanurate foams

US4452921A · kind A · utility

3Cited by

4References

5Claims

0Family size

Assignee

BASF SE

Inventors

Heinrich Horacek · Puchenau, AT
Robert Gehm · Schifferstadt, DE
Wolfram Frank · Heidelberg, DE
Matthias Marx · Fürstenfeldbruck, DE

Key dates

Filing date	Dec 16, 1982
Grant date	Jun 5, 1984
Priority date	—
Expiry date	Dec 16, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2115/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention describes a process for harmonizing the reaction rates for the formation of urethane and isocyanurate groups during the preparation of polyurethane-polyisocyanurate foams by reacting organic polyisocyanates with polyols in the presence of blowing agents and salts of amines having the formula ##STR1## as catalysts, wherein R stands for an hydrogen atom or a straight chained or branched alkyl radical with 1 to 19 carbon atoms, and n and m are equal or different whole numbers from 2 to 10.

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