Wholly aromatic polyamide, process for preparing same and struct

Details Wholly aromatic polyamide, process for preparing same and struct Wholly aromatic polyamide, process for preparing same and struct

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, 528312, 528319, 528331, C08G 6932

Patent

active

049872150

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. Here --Ar--is a divalent, unsubstituted or substituted aromatic radical, 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.

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