Wholly aromatic polyamide

Details Wholly aromatic polyamide Wholly aromatic polyamide

1989-10-16

1991-01-22

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528180, 528183, 528184, 528185, 528336, 528348, C08G 6932

Patent

active

049872176

ABSTRACT:
Aromatic copolyamides, soluble in organic polyamide solvents, comprise at least 95 mol % of the recurrent structural units of the formulae ##STR1## and up to 5 mol % of structural units containing m-bonds. --Ar-- and --Ar'-- are here divalent, unsubstituted or substituted aromatic radicals, the valency bonds of which are in the para-position or in a comparable coaxial or parallel position, and --R and --R' are different from one another and are lower alkyl radicals or lower alkoxy radicals.

REFERENCES:
patent: 3318849 (1967-05-01), Mosley, Jr. et al.
patent: 3600350 (1971-08-01), Kwolek
patent: 3671542 (1972-06-01), Kwolek
patent: 3767756 (1973-10-01), Blades
patent: 3801545 (1974-04-01), Kunzel et al.
patent: 3819587 (1974-06-01), Kwolek
patent: 3888965 (1975-06-01), Kwolek
patent: 4075172 (1978-02-01), Ozawa et al.
patent: 4413114 (1983-11-01), Shimada et al.
patent: 4847354 (1989-07-01), Keil et al.

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