Thermally activable trimerization catalyst

Details Thermally activable trimerization catalyst Thermally activable trimerization catalyst

1985-07-01

1986-12-30

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

560146, 560190, C07C 8730

Patent

active

046327851

ABSTRACT:
Disclosed is a method for the trimerization of organic isocyanates comprising thermally activating, in the presence of said isocyanates, a catalyst comprising a carboxylic acid salt selected from the alkali metal salts or quaternary ammonium salts of particular substituted malonic acids of half-esters thereof, particular carbamyl substituted aliphatic acids, or triaryl acetic acids.
Mixtures of the catalysts with isocyanates have surprisingly long periods of stability at ambient temperatures (about 20.degree. C.) which makes the present method particularly suitable to systems for molding polyisocyanurates wherein long open times are required of a resin pre-mix prior to the actual curing step.

REFERENCES:
patent: 3954684 (1976-05-01), Farrissey et al.
patent: 3980594 (1976-09-01), Fabris et al.
patent: 4040992 (1977-08-01), Bechara et al.
patent: 4136240 (1979-01-01), Zimmerman et al.
patent: 4186255 (1980-01-01), Klein et al.

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