Photochemically stabilized polyamide compositions

Details Photochemically stabilized polyamide compositions Photochemically stabilized polyamide compositions

1997-02-21

1998-09-29

Einsmann, Margaret

Bleaching and dyeing; fluid treatment and chemical modification

Color protecting process for dyed product

8568, 8673, 8685, 8924, 8680, D06P 306

Patent

active

058141073

ABSTRACT:
A process for preparing photochemically stable dyed nylon compositions includes providing to a dyebath a shaped article of poly(epsilon-caprolactam) hydrolytically polymerized in the presence of water, a carboxylic acid chain regulator and a hindered piperidine derivative; and in the dyebath, dyeing the shaped article with one or more metalized or nonmetalized acid dyestuffs.

REFERENCES:
patent: 4756947 (1988-07-01), Nishikawa
patent: 4874391 (1989-10-01), Reinert
patent: 5618909 (1997-04-01), Lofquist et al.

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