Patent ID: 7649074
Filing Date: 2010-01-19
Classification: C08G,C09D

Abstract:
1. A high-functionality, highly branched or hyperbranched polycarbonate produced by a process comprising a) preparing one or more condensation products (K) by b) intermolecularly reacting the one or more condensation products (K) to produce the high-functionality, highly branched or hyperbranched polycarbonate, wherein the proportion of the OH groups to the phosgenes or the aliphatic carbonates in the reaction mixture being chosen such that the condensation products (K) contain on average either one carbonate or carbamoyl chloride group and more than one OH group, or one OH group and more than one carbonate or carbamoyl chloride group, wherein the high-functionality, highly branched or hyperbranched polycarbonate has a weight average molecular weight M wherein the degree of crosslinking of the high-functionality, highly branched or hyperbranched polycarbonate is less than 15%, and wherein the degree of branching of the high-functionality, highly branched or hyperbranched polycarbonate ranges from 10% to 99.9%.