Wetfast polyamide fiber with high amino end group content

US6620208B2 · 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: Mar 30, 2001
• Grant date: Sep 16, 2003
• Expiry date: Jul 26, 2021

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.