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

1999-07-09

2000-10-03

Sergent, Rabon

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

25218223, 25218224, 502150, 502171, 502172, 502344, 544193, 544222, B01J 3102, B01J 3104, B01J 3112, B01J 3126

Patent

active

061273082

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.

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