Dye compositions for dyeing denim cotton yarn in a range of colors and dyeing process and dyed articles using same
US5034016A · kind A · utility
4Cited by
13References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1989 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | May 24, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/918
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dyed denim cotton yarns capable of meeting the market demand for color jeans can be provided by immersing denim cotton yarns in a dye bath containing a dye or dye composition comprising a specific indirubin derivative(s), a specific quinophthalone derivative(s) and/or an indigo dye, squeezing and air-oxidizing the dyed yarns, and repeating a series of these steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.