Poly(ester carbonate) with high glass transition temperature

C - Chemistry – Metallurgy – 08 – G

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402/172

C08G 63/64 (2006.01)

Patent

CA 1147094

ABSTRACT POLY(ESTER CARBONATE) WITH HIGH GLASS TRANSITION TEMPERATURE Poly(ester carbonate) formed by the condensa- tion of an aromatic dihydric alcohol, phosgene and an aromatic or cycloaliphatic dicarboxylic acid or acid ha- lide with at least about 25 mole percent of the dihydric alcohol being a tricyclic aromatic bisphenol, linked in a para-fashion, with all four sites ortho to the phenolic hydroxyl groups being substituted with bromine, chlorine or alkyl of 1-6 carbons. Such poly(ester carbonates) have higher glass transition temperatures than poly(ester carbonates) prepared with unsubstituted bicyclic bisphenols only, while retaining a desirable combination of tensile properties and ductility.

353544

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