Polyurethane elastomers and a process for their production

摘要

Novel polyurethane elastomers having excellent physical properties are prepared utilizing as chain extenders aromatic diamine compounds having the general formula <IMAGE> wherein R is hydrogen, C1 to C4 alkyl, halogen, C 3BOND N, CF3 or SO2-Z wherein Z is C1 to C4 alkyl, several of which diamine compounds are hitherto unknown in the art.