Novel polyisocyanate trimerization catalyst

Details Novel polyisocyanate trimerization catalyst Novel polyisocyanate trimerization catalyst

1975-06-09

1976-10-19

Rzucidlo, Eugene C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252431N, 260 25AC, 260 775NC, C08G 1818

Patent

active

039869911

ABSTRACT:
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 catalysts 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.

REFERENCES:
patent: 3222303 (1965-12-01), Hampson
patent: 3299137 (1967-01-01), Payne et al.
patent: 3342757 (1967-09-01), Considine et al.
patent: 3476933 (1969-11-01), Mendelsohn
patent: 3676380 (1972-07-01), McLaughlin et al.
patent: 3745133 (1973-07-01), Comunale et al.
patent: 3799896 (1974-03-01), Moss

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