POLYCARBONATE FOAM ARTICLES

摘要

A process for the production of polycarbonate foam moldings is disclosed. Accordingly, a composition is prepared comprising mixing a thermoplastic polycarbonate resin and 0.01 to 1 mole-% of a transesterification catalyst and a) 0.1 to 5 mole-% of an aromatic polycarboxylic acid, optionally along with about 0.1 to 5 mole-% of at least one member selected from the group consisting of aliphatic hydroxy carboxylic acids and aliphatic polyalcohols, or b) 0.1 to 5 mole-% of H2O, optionally along with at about 0.1 to 5 mole-% of at least one member selected from the group consisting of aliphatic hydroxycarboxylic acids and an aliphatic alcohols, or c) the additives of said a) and b), or d) 0.1 to 5 mole-% of at least one member selected from the group consisting of diarylcarbonates and oligocarbonates, said percent based in every case on moles aromatic carbonate structural units <IMAGE> in which -O-R-O is a diphenolate residue. The composition obtained is processed to foam moldings by injection molding or by extrusion at temperatures of 210 DEG C. to 340 DEG C.