Process for the dyeing of synthetic polyamide fibre materials
US5356440A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Jul 22, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/248
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the dyeing of synthetic polyamide fibre materials, which comprises dyeing these fibre materials with a reactive dye of the formula EQU HO.sub.3 S--Fa--X--SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H).sub.m(1), in which Fa is a dye radical, X is a direct bond or a radical of the formula --CONHCH.sub.2 CH.sub.2 -- and m is the number 1 or 2, the dye of the formula (1) containing only one sulfo group, from an aqueous liquor at a pH of 5 to 9 and, to set the dyeing temperature, raising the temperature from 80.degree. C. to at least 95.degree. C. over a period of at least 20 minutes. The process according to the invention produces level dyeings on synthetic polyamide fibre materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.