Dyeing process
US3934972A · kind A · utility
4Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1974 |
| Grant date | Jan 27, 1976 |
| Priority date | — |
| Expiry date | Mar 18, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/933
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dyeing cellulose or cellulose/polyester blends by applying unsulphonated dyestuffs containing cyclic anhydride groups, anhydride-forming dicarboxylic acid groups or half-esters or half-amides thereof, as free acids or as salts with ammonia or volatile amines, and heating the fibre until dyestuff fixation takes place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.