CYCLOALIPHATIC DIISOCYANATES OPTIONALLY IN THE FORM OF ISOMER MIXTURES AND A PROCESS FOR THEIR PRODUCTION

摘要

CYCLOALIPHATIC DIISOCYANATES OPTIONALLY IN THE FORM OF ISOMER MIXTURES AND A PROCESS FOR THEIR PRODUCTION Diisocyanates and isomer mixtures of diisocyanates corresponding to the formula < IMG > in which R1 and R2 may be the same or different and each represents hydrogen or (optionally branched) C1-C12- (preferably C1-C4-) alkyl groups, particularly methyl groups, with the proviso that at least one of the radicals R1 and R2 represents an alkyl radical, and m and n are each 0 or 1, with the proviso that the sum of m + n is 1 and where m or n = 0, the free valency remaining is saturated by hydrogen, are produced by phosgenating diamines and isomer mixtures of diamines corresponding to the formula < IMG > in which R1, R2, m and n are as already defined. These diisocyanates which are liquid at room temperature and highly compatible with polyols are particularly useful in the production of polyurethanes.