Process for dyeing cellulose-containing fibre materials
US4292037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1980 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Jan 29, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/6016
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is described a process for dyeing paper or, in particular, cellulose containing fibre material with an aqueous dye liquor, which dye liquor contains at least one cationic or basic dye which PA1 (a) has available at least one system of delocalized .pi.-electrons, which system consists of at least 9 conjugated double bonds lying in one plane, and PA1 (b) possesses a planar molecular structure, the said material being treated, before or during dyeing, with at least one cationic or basic levelling agent; there is no necessity to add salt additionally to the dye bath, and there are obtained by this process level dyeings which exhibit a high degree of exhaustion of the dye, and which are characterized by good fastness properties, especially by good fastness to wet processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.