Fibrillar copolyester having a large aspect ratio, production me

Details Fibrillar copolyester having a large aspect ratio, production me Fibrillar copolyester having a large aspect ratio, production me

1996-01-25

1998-01-06

Acquah, Samuel A.

Stock material or miscellaneous articles

Composite

Of polyester

528361, 525450, 524770, 524771, 428480, B32B 2706, C08G 6306

Patent

active

057052794

ABSTRACT:
A fibrillar copolyester having excellent heat resistance, a reinforcing effect and a large aspect ratio is produced with high dimensional stability and efficiency. A specific fibrillar copolyester having an aspect ratio of at least 3.0 is produced by polymerizing with shearing specific hydroxy aromatic carboxylic acid monomers as starting materials in a nonpolar solvent having 10 or more carbon atoms. Such hydroxy aromatic carboxylic acid monomers preferably have acetylated hydroxyl groups when copolymerized. Additionally, substituents other than hydrogen atoms optionally may be present on the rings of the aromatic monomers when forming the fibrillar copolyester.

REFERENCES:
patent: 4067852 (1978-01-01), Calundann
patent: 4161470 (1979-07-01), Calundann
"Whiskers 9. Synthesis of whisker-like crystals of poly(6-hydroxy-2-naphthoic acid)", Hans R. Kricheldorf et al., High Performance Polym. 6 (1994) pp. 109-121.

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