Isocyanate derivatives of 1,3[oxazoles, oxazines, diazoles and d

Details Isocyanate derivatives of 1,3[oxazoles, oxazines, diazoles and d Isocyanate derivatives of 1,3[oxazoles, oxazines, diazoles and d

Filed on

1976-02-10

Date issued

1979-11-06

Examiner

Wheeler, David

Patent Class

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

SubClass

Organic compounds

SubSubClass

Heterocyclic carbon compounds containing a hetero ring...

Other Related Categories

544 97, 544317, 544 71, 544231, 548312, 548230, 548313, 528 73, 525413, 260 22TN, 260 312XA, C07D23370, C07D23922, C07D26338, C07D26506

Type

Patent

Status

active

Patent number

041735676

Description

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.

REFERENCES:
patent: 3313747 (1967-04-01), Schramm
patent: 3591590 (1971-07-01), Haug et al.
patent: 3641199 (1972-02-01), Niederhauser et al.
patent: 3681377 (1972-08-01), Singhal
patent: 3792023 (1974-02-01), Havenith et al.
patent: 3839354 (1974-10-01), Habermeier et al.
patent: 3953432 (1976-04-01), Wehrmeister
patent: 3963679 (1976-06-01), Ullrich et al.
Van Nostrand Reinhold Company, "The Condensed Chemical Dictionary", 8th ed., 1971, pp. 26, 28 and 657.
Morrison et al., "Organic Chemistry", 1966, p. 1159.

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