Continuous process for the production of blocked isocyanate cont

Details Continuous process for the production of blocked isocyanate cont Continuous process for the production of blocked isocyanate cont

1988-06-22

1989-09-19

Bond, Robert T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

540202, 540460, 540524, 540531, 544193, 544221, 544222, C07D40114, C07D40314

Patent

active

048682985

ABSTRACT:
A continuous method for the high-yield, one-step, solvent-free manufacture of blocked polyisocyanurate compounds useful as curing agents in powder coating compositions. The preferred method of manufacture is to pre-mix a blocking agent and a polymerization catalyst (BAC mix) prior to injection with an organic isocyanate monomer having two or more isocyanate groups (herein termed a polyisocyanate) into a preheated reaction zone wherein the BAC mix and the polyisocyanate react to form the blocked polyisocyanurate compound that is obtained after discharge from the reaction zone and cooling.

REFERENCES:
patent: 4306051 (1981-12-01), Gras et al.
patent: 4696491 (1987-12-01), Kobayashi et al.

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