PROCESS FOR PREPARING POLYURETHANES

摘要

A PROCESS FOR PREPARING POLYURETHANES Novel polyurethanes are prepared by reacting a) an organic diisocyanate of formula <IMG> wherein M represents -CH=CH-; -N=N-; -CH=N-; -?-O-; or <IMG>; and where R1 through R4 may be the same or different and represent hydrogen, halogen, CN, CF3 or saturated aliphatic C1-C12 alkyl residues which may be interrupted by ether hydrogen atoms with b) compounds of molecular weights of from between 400 and 10,000 and which contain at least two active hydrogen atoms reactive toward isocyanate groups.