Thermotropic copolyesteramide, process for its preparation and u

Details Thermotropic copolyesteramide, process for its preparation and u Thermotropic copolyesteramide, process for its preparation and u

1990-11-13

1993-09-07

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528183, 528184, 528185, 528190, 528271, C08G 6300, C08G 6302

Patent

active

052430170

ABSTRACT:
A thermotropic copolyesteramide, with a nematic structure of the liquid crystalline phase within a desired temperature range of the mesophase, contains metered amounts of units derived from: (a) a saturated aliphatic -dicarboxylic acid; (b) 4,4'-dihydroxydiphenyl; (c) 4-hydroxybenzoic acid and (d) 4-aminobenzoic acid or (d') 4-aminophenol.
This thermotropic copolyesteramide, produced by the copolymerization of monomers in the molten state, is a material with self-reinforcing characteristics capable of yielding, by normal injection or extrusion processes, remarkable molecular orientations which impart a high rigidity to the manufactured products.
The copolyesteramide may be used as a reinforcement material for traditional thermoplastic polymers, by usual techniques.

REFERENCES:
patent: 4562244 (1985-12-01), Yoon
patent: 4833229 (1989-05-01), Magagnini et al.
patent: 5025082 (1991-06-01), Kishiro et al.
patent: 5030703 (1991-07-01), Pielartzik et al.
patent: 5068308 (1991-11-01), Pipper et al.
Yumiko Kumazawa, Chemical Abs., vol. 13, No. 221, (C-598) (3569), May 23, 1989, Copolyester, Copolyester-Amide and Production of Injection-Moldable Material Prepared Therefrom.

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