Catalytic cyclotrimerization of polyisocyanates

Details Catalytic cyclotrimerization of polyisocyanates Catalytic cyclotrimerization of polyisocyanates

1983-03-01

1985-08-27

Jiles, Henry R.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

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

Patent

active

045379610

ABSTRACT:
Polyisocyanato-polyisocyanurates are prepared by catalytically cyclotrimerizing a polyisocyanate in the presence of a catalytically effective amount of an aminosilyl catalyst, and which is characterizing by terminating the cyclotrimerization reaction when a predetermined desired amount of isocyanurate groups has been obtained, by adding to the reaction mixture 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: 3098048 (1963-07-01), Shelanski et al.
patent: 3775380 (1973-11-01), Miller
patent: 4412073 (1983-10-01), Robin
Kogon, J. C., J.A.C.S., vol. 78, pp. 4911-4914, Oct. 1956.

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