OPTIONAL ISOMERIC MIXTURE REPRESENTATIVE CYCLOALIPHATIC DIISOCYANATES, A METHOD FOR THE PRODUCTION THEREOF AND THEIR USE AS BASE MATERIALS IN THE PRODUCTION OF POLYURETHANE MATERIALS

摘要

A diisocyanate corresponding to the formula IMAGE in which R1, R2, R3, m and n are as defined herein is prepared by phosgenating a diamine corresponding to the formula IMAGE in which R1, R2, R3, m and n are as defined herein. The diisocyanate may contain C1-C12-monoalkyl-substituted methylene-bis-(cyclohexylisocyanate)isomers in an amount of up to 40 wt. %. These new diisocyanates which are liquid at room temperature and compatible with polyols are particularly useful in the production of polyurethanes.