High molecular weight copolyesters for high modulus fibers

Details High molecular weight copolyesters for high modulus fibers High molecular weight copolyesters for high modulus fibers

1993-04-26

1995-09-26

Acquah, Samuel A.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

528272, 528274, 528298, 528302, 528308, D02G 300

Patent

active

054533210

ABSTRACT:
High to ultrahigh polyester compositions comprising monomer units derived from 2,6-naphthalenedicarboxylic acid, 4,4'-bibenzoic acid and ethylene glycol are useful as fibers and molding resins when the mole ratio of 4,4'-bibenzoic acid to 2,6-naphthalenedicarboxylic acid is from about 60:40 to about 40:60, and especially when the two diacids are included in about equimolar amounts. These compositions yield fiber with excellent tensile properties, both at room temperature and at elevated temperatures. When these compositions are melt spun at a relatively low melt temperature and high draw down ratio, fibers with excellent tensile properties are obtained without a subsequent drawing step.

REFERENCES:
patent: 3008934 (1961-11-01), Wielicki et al.

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