Process for dyeing synthetic polyamide fiber materials
US5810890A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Sep 27, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/924
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for dyeing synthetic polyamide fibers, in particular in form of micro fibers, is described comprising the use of polyamide fibers having an amino end group content of at least 60 gram equivalents per 1000 kilograms of polyamide polymer and using a dye composition of water-soluble dyes containing at least one dye having 1 or 2 vinylsulfonyl groups and at least 1 dye having 1 or 2 groups of the general formula (A) EQU --SO.sub.2 --CH.sub.2 --CH.sub.2 --N(R)--V--X (A) (in which R is hydrogen or alkyl of 1 to 4 carbon atoms which may be interrupted by 1 or 2 hetero groups and substituted by sulfo, carboxy, hydroxy, sulfato, phosphato and/or lower alkanoylamino, V is a covalent bond or alkylene of 2 to 4 carbon atoms or a group of the formula --CO--NH--CH.sub.2 --CH.sub.2 -- and X is a water-solubilizing group), the dyes with the vinylsulfonyl group and the dyes with the group of the formula (A) being present in the ratio of from 90:10 mol-% to 60:40 mol-%, or using a dye composition containing at least one water-soluble dyestuff having 1 or 2 vinylsulfonyl or .beta.-sulfatoethylsulfonyl groups, and an amino compound of the general formula (B) EQU H--N(R)--V--X (B) the dye(s) …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.