Process for preparing polyisocyanato/polyisocyanurates by cataly

Details Process for preparing polyisocyanato/polyisocyanurates by cataly Process for preparing polyisocyanato/polyisocyanurates by cataly

1985-10-30

1987-06-23

Ford, John M.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544222, 521128, 521902, 526194, 528 52, C07D25134, C08G 1802, C08F 416

Patent

active

046754016

ABSTRACT:
Polyisocyanurate/polyisocyanates of enhanced stability are prepared by partial catalytic cyclotrimerization of a polyisocyanate in the presence of a catalytically effective amount of an aminosilyl catalyst and wherein the cyclotrimerization reaction is terminated when a predetermined desired amount of isocyanurate groups has been attained, by adding to the reaction mixture, after the cooling thereof to a temperature of below 50.degree. C., a reaction terminating amount of an organic catalyst deactivating compound comprising at least one free hydroxyl moiety, or the reaction product of such hydroxylated organic catalyst deactivating compound with an isocyanate.

REFERENCES:
patent: 4537961 (1985-08-01), Robin

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