Substantially pure isocyanurate/polyisocyanates

Details Substantially pure isocyanurate/polyisocyanates Substantially pure isocyanurate/polyisocyanates

1989-03-29

1990-10-16

Lee, Mary C.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544193, C07D25130

Patent

active

049636758

ABSTRACT:
Substantially pure isocyanurate/polyisocyanates, i.e., containing no more than about 0.03% by weight of residual diisocyanate monomer and no more than about 1% by weight of diisocyanate dimer, are produced by extracting impure cyclotrimerized diisocyanates with an inert gas in either the liquid or supercritical state.

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