Process for preparing wetfast polyamide fibers

US6783560B2 · kind B2 · utility

Assignee

• HONEYWELL INTERNATIONAL INC. · US

Inventors

• Ulrike Breiner · Wiesbaden, DE
• Dean R. Gadoury · Lake Jackson, US
• Harry Hu · Arden, US
• Theodore G. Karageorgiou · Arden, US

Key dates

• Filing date: Oct 16, 2002
• Grant date: Aug 31, 2004
• Expiry date: Oct 16, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/924
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A modified polyamide polymer having a high amino end group content, with more than 30 percent of the amino end groups being secondary or tertiary amine, dramatically improves the dye bleed performance. The modified polyamide may be prepared by polymerization of polyamide-forming monomers in the presence of a carboxylic acid and a hindered piperidine derivative in amounts sufficient to achieve the high amino end group content.