Thermotropic liquid crystalline polymer reinforced with polyimid

Details Thermotropic liquid crystalline polymer reinforced with polyimid Thermotropic liquid crystalline polymer reinforced with polyimid

1983-01-14

1995-03-28

Wu, Shean

Compositions

Liquid crystal compositions

428 1, 523205, 523207, C09K 1900, C09K 1952, C08K 900

Patent

active

054017793

ABSTRACT:
A thermotropic liquid crystalline polymer matrix having sized carbon fibers incorporated therein for reinforcement. The carbon fibers are coated on their surface with a sizing composition comprising a rigid polyimide coating which is derived from the reaction of at least one aromatic diamine, at least one dianhydride, and at least one aromatic tetracarboxylic acid diester in which the carboxylic acid groups and ester groups are ortho disposed. By the use of appropriate amounts of heat and pressure, multifilamentary bundles of carbon fibers are readily impregnated with thermotropic liquid crystalline polymer to form a prepreg having a uniform distribution of carbon fiber throughout.

REFERENCES:
patent: 4140016 (1979-02-01), Fergason
patent: 4272346 (1981-06-01), Jakubowski et al.
patent: 4381886 (1983-05-01), Yokokura et al.
Derwent Abst. 86770 A/48 (Oct. 1978) "Carbon Fibres Coated with Polyimide Resin (prepolymer) . . . " Toho Belson KK.

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