Substantially pure isocyanurate/polyisocyanates

Details Substantially pure isocyanurate/polyisocyanates Substantially pure isocyanurate/polyisocyanates

1987-12-02

1989-09-05

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, C07D25104

Patent

active

048640255

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.

REFERENCES:
patent: 4288586 (1981-09-01), Bock et al.
Tanaka et al., Chem. Abstracts, vol. 74, No. 15; 76515v (1971).

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