Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1979-06-11
1980-12-30
Cockeram, H. S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 59, 528 69, 4273855, C08G 1877, C08G 1814, C08G 1878
Patent
active
042424895
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), Harenith et al.
patent: 3839354 (1974-10-01), Habermeier et al.
patent: 3953432 (1976-04-01), Wehrmeister
patent: 3963679 (1976-06-01), Ullrich et al.
Saunders et al., Polyurethanes, Part I, Interscience, N.Y. (1962) pp. 64-73.
Findeisen Kurt
Uerdingen Walter
Wagner Kuno
Bayer Aktiengesellschaft
Cockeram H. S.
Harsh Gene
Pope Lawrence S.
Roy Thomas W.
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