Process for the production of polyisocyanates which contain...

Details Process for the production of polyisocyanates which contain... Process for the production of polyisocyanates which contain...

C - Chemistry, Metallurgy

07

D

260/248.7

C07D 251/34 (2006.01) B01J 31/02 (2006.01) C08G 18/79 (2006.01) C08G 18/80 (2006.01)

Patent

CA 1334849

The present invention is directed to a process for the preparation of a polyisocyanate having an isocyanurate structure which comprises heating an organic diisocyanate to a temperature of from 100 to 275°C in the presence of a catalytic amount of a co-catalyst mixture comprising (i) a tertiary amine selected from the group consisting of 3-azabicyclo[3,2,2]nonane, 1,4-diazabicyclo[2,2,2]octane, 1-azabicyclo [2,2,2]octane, 1,8-diazabicyclo[5,4,0]undec-7- ene, C1 to C4 substituted homologues thereof and mixtures thereof, and (ii) a low molecular weight organic hydroxy group containing compound and/or a carbamic acid ester thereof, for a period of from about 0.1 minute to about 360 minutes.

607712

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