Optically anisotropic melt forming aromatic copolyesters based o

Details Optically anisotropic melt forming aromatic copolyesters based o Optically anisotropic melt forming aromatic copolyesters based o

1987-05-06

1988-05-24

Phynes, Lucille M.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

26433121, 528171, 528173, 528176, 528190, 528193, 528194, 528206, B32B 2700

Patent

active

047465662

ABSTRACT:
Novel copolyesters derived from (a) aromatic diols, (b) dicarboxylic acids and (c) aromatic hydroxycarboxylic acids, in which the aromatic hydroxycarboxylic acid component (c) comprises 20 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.degree. C. into moldings, fibres and films which have outstanding mechanical properties.

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