AROMATIC POLYAMIDES AND THEIR PRODUCTION

摘要

NOVEL AROMATIC POLYAMIDES AND THEIR PRODUCTION The specification discloses an aromatic polyamide comprising (1) a unit of the formula; and (2) a unit of the formula: 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)-ethylene-diamine 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. The polyamide can be used to prepare shaped products such as fibers and films, and especially as material for tyre cords and plastic reinforcing agents.