Process for dyeing natural or synthetic polyamide fibre materials with 1:1 metal complex dyes or mixtures of dyes with fluoride, fluorosilicate or fluoroborate
US4681596A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | May 9, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/924
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for dyeing natural or synthetic polyamide fibre material levelly from an aqueous liquor, with 1:1 metal complex dyes and at least one metal free dye, all of which contain sulfo groups, in the presence of an alkali metal salt or an ammonium salt and optionally in the presence of an assistant, which comprises carrying out dyeing in the presence of an alkali metal fluoride or ammonium fluoride, or an alkali metal fluorosilicate or ammonium fluorosilicate, or of an alkali metal fluoroborate or ammonium fluoroborate, at a pH in the range from 3 to 7. The process of this invention is suitable for dyeing natural or synthetic polyamide material in level shades of good fastness properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.