摘要:
There is disclosed thermoplastic polymeric compositions of polycarbonates, polyamides, polyacetals, and poly(2,6-dimethyl-1,4-phenylene oxides) and which contain in a minor amount sufficient to make the thermoplastic polymeric material easily releasable from a processing mold of fatty acid ester.
摘要:
A process has been surprisingly discovered that can produce a high heat carbonate polymer (i.e., one with a Tg greater that 150.degree. C.), without the drawbacks encountered in attempts to produce a high heat carbonate polymer. The process of the instant invention comprises the steps of:(1) reacting an aromatic amine with a dihydric phenol to prepare an aminophenol;(2) reacting an anhydride or dianhydride with the aminophenol to prepare a phenolic precursor; and(3) reacting the phenolic precursor with a carbonate precursor to prepare a high heat carbonate polymer.