Polyisocyanate trimerization catalyst and process for...

Details Polyisocyanate trimerization catalyst and process for... Polyisocyanate trimerization catalyst and process for...

C - Chemistry, Metallurgy

08

G

252/124, 403/13

C08G 18/18 (2006.01) C08G 18/09 (2006.01) C08G 18/16 (2006.01)

Patent

CA 1037646

ABSTRACT OF THE DISCLOSURE A novel catalyst combination for the trimerization of polyisocyanates to polyisocyanurates is disclosed. The catalyst combination comprises (i) a tertiary amine trimerization catalyst containing a dimethylamino moiety, (ii) an alkali metal salt of an N-(2-hydroxyphenyl)methyl glycine, and (iii) a monomeric epoxide. The use of these catalyses in the preparation of polyisocyanurate foams results in facile machine preparation of bun stock foam without incurring the processing problems that arise from the prior art method. The polyisocyanurate foams produced using the novel catalyst combination of the invention are characterized by a reduced level of smoke generated on combustion.

217032

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