Method for dyeing fibrous materials
US5427589A · kind A · utility
4Cited by
36References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1993 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Mar 3, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/934
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for dyeing fibrous material is provided. The method includes contacting a fibrous material with a dyebath comprising a mixture of a dye assistant and a dye soluble or dispersed with dye assistant in the dyebath. The dye assistant comprises a salt of a low molecular weight aromatic sulfonic acid, and can include a low molecular weight surfactant. The dye assistant of the present invention can be advantageously utilized for dyeing difficult to dye fibers such as aromatic polyamide fibers, polybenzimidazole fibers and aromatic polyimide fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.