Preparation of alkylene diisocyanates

Details Preparation of alkylene diisocyanates Preparation of alkylene diisocyanates

1975-03-05

1976-06-08

Gotts, Lewis

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260239BC, 260251R, 2603097, C07C11800

Patent

active

039623017

ABSTRACT:
Alkylene diisocyanates of the formula OCN-R-NCO are prepared by heating a compound of the formula ##EQU1## at a temperature of about 200.degree. to about 500.degree. C. wherein --R-- is dimethylene, trimethylene or tetramethylene which may bear lower alkyl substituents. For example, ethylene diisocyanate is prepared by heating ethylene urea N,N'-dicarbonyl chloride at about 350.degree.C.

REFERENCES:
patent: 3275618 (1966-09-01), Tilley et al.

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