Polyimide-esters and filaments

Details Polyimide-esters and filaments Polyimide-esters and filaments

1981-12-28

1983-05-10

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528271, 528289, 528322, C08G 7316

Patent

active

043831052

ABSTRACT:
High modulus filaments are melt-spun from polyimide-esters derived from I 6-hydroxy-2-naphthoic acid, a diphenol and 4-carboxy-N-(p-carboxyphenyl)-phthalimide; II 6-hydroxy-2-naphthoic acid, an aromatic dicarboxylic acid 4-hydroxy-N-(p-hydroxyphenyl)phthalimide; or III 6-hydroxy-2-naphthoic acid, 4-hydroxybenzoic acid and 4-carboxy-N-(p-hydroxyphenyl)phthalimide. The polyimide esters are optically anisotropic in the melt. As-spun filaments from these polymers can be heat treated while free from tension to increase their tenacity.

REFERENCES:
patent: 3542731 (1970-11-01), Culbertson
patent: 4041065 (1977-08-01), Lindberg et al.
patent: 4101488 (1978-07-01), Ishizuka et al.
patent: 4161470 (1979-07-01), Calundann
patent: 4176223 (1979-11-01), Irwin
patent: 4183839 (1980-01-01), Gagliani et al.
patent: 4206261 (1980-06-01), Laganis et al.
patent: 4219461 (1980-08-01), Calundann
patent: 4245086 (1981-01-01), Uno et al.
patent: 4256624 (1981-03-01), Calundann
Chemical Abstracts, vol. 83, p. 29, (1975).

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