Salt free dyeing of cellulosic fibers with anionic dyes
US6350872B1 · kind B1 · utility
0Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1998 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Oct 28, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/66
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Quaternary ammonium compounds having at least two fiber reactive sites and at least two dye reactive sites, and processes for making and using the same are disclosed. The compounds of the invention can advantageously be used in a cellulosic fabric pretreatment process to allow anionic dyeing without requiring salt to exhaust or drive the dye into the cellulosic fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.