Patent ID: 6620208
Filing Date: 2003-09-16
Classification: C08G,Y10S

Abstract:
A dyeable wetfast fiber formed of polyamide polymer having a high amino end group content which is comprised of the polyamide polymerization reaction product of polyamide-forming monomers in the presence of between about 0.50 to about 0.80 weight percent of a hindered piperidine derivative and between about 0.05 to about 0.40 weight percent of a carboxylic acid chain regulator sufficient to form a polyamide polymer having at least about 65 percent amino end groups comprised of secondary or tertiary amines, wherein when dyed said fiber exhibits better wetfast properties, including improved resistance to dye bleeding in water and improved colorfastness to laundering, as compared to fibers formed of polyamide polymers having a content of secondary or tertiary amino end groups of less than about 65 percent.