PROCESS FOR THE PRODUCTION OF DIISOCYANATES, SELECTED DIISOCYANATES PRODUCED THEREBY AND THE PRODUCTION OF POLYURETHANE PLASTICS THEREFROM

摘要

A PROCESS FOR THE PRODUCTION OF DIISOCYANATES, SELECTED DIISOCYANATES PRODUCED THEREBY AND THE PRODUCTION OF POLYURETHANE PLASTICS THEREFROM Diisocyanates corresponding to a specified formula are produced by reacting an alcohol corresponding to a specified formula with a nitrochlorobenzene 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.