Aromatic thermotropic copolyesters and process for their...

C - Chemistry – Metallurgy – 08 – G

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C08G 63/06 (2006.01) C08G 63/60 (2006.01) C08G 63/664 (2006.01)

Patent

CA 2028309

PRECIS DE LA DIVULGATION: Copolyesters aromatiques thermotropes comprenant des unités récurrentes: I Image II Image III Image et éventuellement IV Image dans lesquelles Ar1 représente un radical aromatique et/ou cycloaliphatique et Ar2 un radical aromatique. Ils sont obtenus par polycondensation d'acide p-(hydroxy p- phénoxy)benzoïque, d'un diacide aromatique ou cycloaliphatique, d'un diphénol et éventuellement d'acide p- hydroxy benzoïque. Ces copolyesters possèdent la caractéristique d'être thermotropes, c'est-à-dire qu'ils sont capables de donner des masses fondues anisotropes qui sont faciles à conformer par filage ou moulage.

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