Optically anisotropic melt forming aromatic copolyesters...

Details Optically anisotropic melt forming aromatic copolyesters... Optically anisotropic melt forming aromatic copolyesters...

C - Chemistry, Metallurgy

08

G

117/197, 402/202

C08G 63/60 (2006.01) C09K 19/38 (2006.01)

Patent

CA 1307073

TITLE OPTICALLY ANISOTROPIC MELT FORMING AROMATIC COPOLYESTERS BASED ON T-BUTYL 4-HYDROXYBENZOIC ACID ABSTRACT OF THE DISCLOSURE Novel copolyesters derived from (a) aromatic diols, (b) dicarboxylic acids and (c) aromatic hydroxycarboyxlic acids, in which the aromatic hydroxycarboyxlic acid component (c) comprises 15 to 60 mole % of the copolyester and in which t-butyl- 4-hydroxybenzoic acid constitutes 25 to 100 mole % of the aromatic hydroxycarboxylic acid component (c), are disclosed. These copolyesters are anisotropic And fabricable in the melt. They generally can be processed using conventional thermoplastic shaping techniques at temperatures below 350 degrees C. into moldings, fibers and films which have outstanding mechanical properties. AD-5594 35

563301

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