Method of increasing depth shade
US8007546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2004 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Jul 7, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method of increasing the depth of shade of dyed natural or synthetic polyamide fiber materials, which comprises treating the fiber material before, during or after dyeing with a liquor comprising a compound of formula (1) wherein R is halogen, C1-C12alkyl, C5-C24aryl, C6-C36aralkyl, —OR1, or —NR1R2, R1 and R2 being, each independently of the other, hydrogen, C1-C12alkyl unsubstituted or substituted by one or more hydroxy, amino, mercapto, carboxyl, sulfo, C1-C12alkylsulfonyl, C5-C24arylsulfonyl or C6-C36aralkylsulfonyl groups, C5-C24aryl unsubstituted or substituted by one or more hydroxy, amino, carboxyl, sulfo, C1-C12 alkylsulfonyl, C5-C24arylsulfonyl or C6-C36aralkylsulfonyl groups, or C6-C36aralkyl unsubstituted or substituted by one or more hydroxy, amino, carboxyl, sulfo, C1-C12alkylsulfonyl, C5-C24arylsulfonyl or C6-C36aralkylsulfonyl groups, X and Y are, each independently of the other, mercapto, —NR3R4 or —N+R3R4R5A−, wherein R3, R4 and R5 are, each independently of the others, hydrogen or C1-C12alkyl and A− is chloride, bromite, iodide, sulfate or methylsulfate, R6 and R7 are, each independently of the other, hydrogen or C1-C12alkyl, and x and y…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.