Melt extrusion spinning polyamide fibers with sulfonated reagent
US6537475B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1995 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Aug 31, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An acid dye stain-resistant fiber-forming polyamide composition comprising a fiber-forming polyamide and a reagent, at least a portion of which associates with free acid dye sites in the polyamide, thereby disabling the acid dye sites in fibers formed from the composition from taking up acid dye stains; a masterbatch concentrate for addition to a fiber-forming polyamide to form an acid dye stain-resistant fiber-forming polyamide composition comprising a carrier compatible with the fiber-forming polyamide combined with an amount of the above reagent in excess of that desired in the acid dye stain-resistant fiber-forming polyamide; as well as fibers and articles of manufacture prepared therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.