Catalyst and a method for the trimerization of isocyanates

Details Catalyst and a method for the trimerization of isocyanates Catalyst and a method for the trimerization of isocyanates

2006-08-15

2006-08-15

Balasubramanian, Venkataraman (Department: 1624)

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C544S222000, C548S335100, C558S017000, C252S182200, C521S137000, C528S052000

Reexamination Certificate

active

07091341

ABSTRACT:
A method is described of preparing (poly)isocyanurate polyisocyanates by catalytic cyclotrimerization of isocyanates. A catalytic system is used which includes a cyclotrimerization catalyst based on a quatemary ammonium salt and imidazole as a cocatalyst.

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