Cyclic polycarbonates and copolycarbonates,production and use thereof

摘要

A cyclic (co)polycarbonate resin is disclosed. The resin conforms structurally to general formulae (1a) or (1b), in which -D- and -E- independently denote an aromatic group having 6 to 40 C atoms, k stands for an integer from 1 to 4000 and m, n and o each independently of the other, stand for numbers from 1 to 4000. The resin is suitable for making a variety of useful articles.