Preparation of isocyanate derivatives of 1,3[oxazoles, oxazines,

Details Preparation of isocyanate derivatives of 1,3[oxazoles, oxazines, Preparation of isocyanate derivatives of 1,3[oxazoles, oxazines,

1979-06-11

1981-01-27

Tovar, Jose

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

Organic compounds

Chalcogen in the nitrogen containing substituent

548221, 548317, C07D26504, C07D26304, C07D23370, C07D23922

Patent

active

042476895

ABSTRACT:
The present invention relates to a new organic heterocyclic isocyanate which is the reaction product of an organic diisocyanate and an amino or hydroxy nitrile. The invention also relates to a process of producing such isocyanates by reacting an excess of the diisocyanate with the nitrile under conditions under which the nitrile will not decompose and then maintaining the reaction mixture at an elevated temperature until the isocyanate nitrile adduct cyclizes. The reaction may be carried out in the presence of a catalyst for isocyanate addition reactions. Additionally, the invention relates to a process for the production of polyurethane by the reaction of the heterocyclic isocyanates with compounds carrying at least two isocyanate reactive hydrogen atoms per molecule.

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