Epoxidized isocyanates and process for their preparation

A process for preparation of a compound selected from those of the formulae:

• ##STR7## or a mixture of (I) and (II), said process comprising reacting (a) a tertiary aralkyl isocyanate of the formulae:
• ##STR8## or a mixture of any of (III) and (IV), with (b) an effective amount of an epoxidizing agent of the general formula
• ROOH
• wherein R is selected from ##STR9## wherein R.sup.1 and R.sup.2 are independently selected from alkyl and halo-substituted alkyl of 1 to 12 carbon atoms and aryl and halo substituted aryl-alkaryl, halo-substituted alkaryl, aralkyl and halo-substituted aralkyl of from 1 to 12 carbon atoms;
• in
• (c) an inert organic solvent at a temperature of from about -35.degree. C. to about 50.degree. C. until formation of (I) or (II) or a mixture of (I) and (II) is substantially complete.