Process for the production of diisocyanates, selected...

Details Process for the production of diisocyanates, selected... Process for the production of diisocyanates, selected...

C - Chemistry, Metallurgy

07

C

260/455.7

C07C 263/10 (2006.01) C07C 265/14 (2006.01) C08G 18/77 (2006.01)

Patent

CA 1292006

A PROCESS FOR THE PRODUCTION OF DIISOCYANATES, SELECTED DIISOCYANATES PRODUCED THEREBY AND THE PRODUCTION OF POLYURETHANE PLASTICS THEREFROM ABSTRACT OF THE DISCLOSURE Diisocyanates corresponding to a specified formula are produced by reacting an alcohol corresponding to a specified formula with a nitrochloro- benzene in the presence of NaOH and/or KOH in powder form and a strongly polar, aprotic solvent to produce a dinitro compound corresponding to a specified formula. This dinitro compound is hydrogenated to form the corresponding diamine which diamine is phosgenated to produce the corresponding diisocyanate. The resultant diisocyanates may then be used as starting materials in polyisocyanate addition processes.

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