Block copolymers based on polycarbodiimides, a process for their preparation and their use as stabilising agents against hydrolysis

摘要

Polycarbodiimide block copolymers (I) are new. Polycarbodiimide block copolymers is of formula (I): X-(-(A)m-(B)n-)o-X (I) X = NHCOR, NHCONHR, NHCOOR, NHCOSR, COOR, OR, NR2, SR, SH, OH, NH2, NHR or NCO; R = 1-30C alkyl, cycloalkyl, aralkyl or aryl; m, n = 1-500; A = -N=C=N-Y-; Y = an ortho- or bisortho-substituted aromatic group or a aralkylene or cycloalkylene group in which the C atom bonded to the carbodiimide group is substituted with a 1-14C alkyl group; B = a (poly)diol, (poly)diamine, (poly)dimercaptan, (poly)aminoalcohol, (poly)aminomercaptan or (poly)mercaptoalcohol residue. An Independent claim is also included for the production of (I) by copolymerizing components A and B in the presence of a catalyst at 30-200 degrees C.