A cocatalyst system for trimerizing isocyanates

Details A cocatalyst system for trimerizing isocyanates A cocatalyst system for trimerizing isocyanates

1976-10-06

1978-07-18

Welsh, M. J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

252431C, 252431N, 428425, 521125, 521902, 521156, 521162, C08G 1814

Patent

active

041014650

ABSTRACT:
A novel cocatalyst combination for the trimerization of polyisocyanates to polyisocyanurates is disclosed. The catalyst combination comprises: (a) alkali metal glycine salts, (b) hydroxyalkyltrialkylammonium carboxylate salts, and (c) alkali metal salts selected from the group consisting of (i) alkali metal salts of N-phenyl aliphatic amides, and (ii) alkali metal salts of aliphatic carboxylic acids. The use of the cocatalyst combination provides for the facile formation of polyisocyanurate foam laminate boardstock which is characterized by good fire resistance and good physical properties.

REFERENCES:
patent: 3010963 (1961-11-01), Erner
patent: 3892687 (1975-07-01), Bechara et al.
patent: 3896052 (1975-07-01), Lockwood et al.
patent: 4040992 (1977-08-01), Bechara et al.

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