Trimer catalyst system for aliphatic and aromatic isocyanates

Details Trimer catalyst system for aliphatic and aromatic isocyanates Trimer catalyst system for aliphatic and aromatic isocyanates

1997-12-31

1999-09-21

Sergent, Rabon

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

528 49, 528 55, 528 57, 528 58, 528 73, 528 85, 544193, 560330, 560336, 564 44, 564 45, C07D25134

Patent

active

059556099

ABSTRACT:
This invention relates to a novel trimerization catalyst system, and to a process for trimerizing organic polyisocyanates in the presence of thermally active catalyst systems. These catalyst systems comprise (A) compounds selected from the group consisting of (i) lithium salts of aliphatic or aromatic carboxylic acids, (ii) lithium salts of hydroxyl group containing compounds wherein the hydroxyl groups are directed attached to an aromatic ring, and (iii) lithium hydroxide; (B) an allophanate catalyst; and (C) an organic compound which contains at least one hydroxyl group.

REFERENCES:
patent: 3954684 (1976-05-01), Farrissey, Jr. et al.
patent: 4379905 (1983-04-01), Stemmler et al.
patent: 4487928 (1984-12-01), Richter et al.
patent: 4540781 (1985-09-01), Barsa
patent: 4604481 (1986-08-01), Kam et al.
patent: 4632785 (1986-12-01), Barsa

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