Aromatic polyamides from N,N'-bis(p-aminobenzoyl)ethylene diamine
AssigneeToyobo Co., Ltd.
InventorsTuyoshi Konomi, Seiji Endo, Masayasu Yamaguchi, Kenichi Katsuo
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Abstract
An aromatic polyamide comprising (1) a unit of the formula: ##STR1## and (2) a unit of the formula: ##STR2## and being excellent in strength, rigidity and heat resistance and improved in light resistance, flexibility and wear resistance, which can be produced by polycondensation of a diamine component comprising N,N'-bis(p-aminobenzoyl)-ethylenediamine and p-phenylenediamine, the content of the N,N'-bis (p-aminobenzoyl)ethylenediamine being from about 0.6 to 50 mol %, with a dicarboxylic acid component comprising terephthalic acid or its reactive derivative in a substantially equimolar amount to the diamine component in an amide polar solvent.
Claims17
A filament forming aromatic polyamide which consists essentially of ( 1) a unit of the formula:
- ##STR6## and (2) a unit of the formula:
- ##STR7## the amount of the unit (2) being from about 0.6 to 50 mol% on the basis of the combined amount of the units (1) and 2).
A process for preparing a filament forming aromatic polyamide, which comprises polycondensing a diamine component comprising N,N'-bis (p-aminobenzoyl)ethylenediamine and p-phenyl-enediamine, the amount of N,N'-bis(p-aminobenzoyl)ethylenediamine being from about 0.6 to 50 mol % on the basis of the amount of diamine component, with a dicarboxylic acid component comprising terephthalic acid or its reactive derivative in a substantially equimolar ratio in at least one amide polar solvent.
Dependencies are inferred from the claim text.