Diisocyanates having urea groups, a process for their preparatio

Details Diisocyanates having urea groups, a process for their preparatio Diisocyanates having urea groups, a process for their preparatio

1980-05-22

1981-06-30

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

260453AR, 521162, 528 59, 528 67, C08G 1877, C08G 1814

Patent

active

042763860

ABSTRACT:
This invention relates to new diisocyanates containing urea groups which are liquid at room temperature or can be liquefied by heating to a temperature of up to 80.degree. C. These novel diisocyanates may be in the form of solutions in isocyanate prepolymers. The invention also is directed to a process for preparation of these new diisocyanates by the reaction of special diisocyanate starting materials and water and to their use as components for the production of polyurethanes.

REFERENCES:
patent: 2597025 (1952-05-01), Orth
patent: 2757184 (1956-07-01), Pelley
patent: 2902474 (1959-09-01), Arnold et al.
patent: 3361844 (1968-01-01), Hoeschele
patent: 3454606 (1969-07-01), Brotherton et al.
patent: 3906019 (1975-09-01), Campbell et al.
patent: 3943158 (1976-03-01), Dietrich et al.
patent: 4055548 (1977-10-01), Carleton et al.

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