Liquid crystalline polyesters and molding compositions prepared

Details Liquid crystalline polyesters and molding compositions prepared Liquid crystalline polyesters and molding compositions prepared

1998-04-09

2000-07-25

Boykin, Terressa M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528298, 528302, 528307, 528308, 524494, 428 1, C08G 6400

Patent

active

060937874

ABSTRACT:
Disclosed is a select class of liquid crystalline polyesters and molding compositions comprising the polyesters and glass fiber. The liquid crystalline polyesters consist essentially of (1) diacid residues consisting essentially of (i) cyclohexanedicarboxylic acid residues and (ii) other diacid residues selected from terephthalic acid residues, 2,6-naphthalenedicarboxylic acid residues, or a mixture thereof; (2) diol residues consisting essentially of hydroquinone residues, 4,4'-biphenol residues or a mixture thereof; and, optionally, (3) p-hydroxybenzoic acid residues. In the above definition, the moles of diol residues are equal to the moles of diacid residues and the total of the (1), (2) and (3) mole percentages is equal to 100. The liquid crystalline polyesters have melting points determined by differential scanning calorimetry equal to or less than 375.degree. C.

REFERENCES:
patent: 4169933 (1979-10-01), Jackson, Jr. et al.
patent: 4327206 (1982-04-01), Jackson, Jr. et al.
Patent Abstracts of Japan, vol. 18, No. 591 (C-1272) Nov. 11, 1994 & JP 06 220178A (Nippon Oil Co. Ltd.) Aug. 9, 1994.
Derwent Publications Ltd., London, GB; JP 01 167 362 A, Tosoh Corporation, Jul. 3, 1983.
Chemical Abstracts, vol. 96, No. 18, May 1982, #143444r, Polk M. et al: "Liquid Crystal Block Copolyesters II", p. 9.

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