Patent ID: 6074749
Filing Date: 2000-06-13
Classification: C08G,D01F,Y10T

Abstract:
Acid-dyeable polyamide fibre obtained by spinning a polyamide having an amino end group content of less than 10 meq/kg in which the polyamide having an amino end group content of less than 10 meq/kg is built up of repeating units produced by reaction between at least one diamine and at least one dicarboxylic acid (AABB) or by ring-opening polymerization of a lactam (AB) or by condensation of an amino acid (AB), characterized in that, in each polyamide chain in the case of AABB units, at least one unit derived from a dibasic acid having the formula--Z--X--Z--is present in the polyamide chain, or the polyamide chain is terminated by at least one unit having the formula--Z--X--Yand, in each polyamide chain in the case of AB units, at least one unitY--X(--Z--).sub.nis present, where X=an organic radical having a basic nature, Y=H or ZH and n=1-20 and Z=an acid radical.