Concentrated solutions, miscible with water in any ratio of anionic dyestuffs
US3963430A · kind A · utility
7Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1975 |
| Grant date | Jun 15, 1976 |
| Priority date | — |
| Expiry date | May 8, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0073
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Stable, concentrated solutions, miscible with water in any ratio, of azo and anthraquinone dyestuffs containing sulphonic acid groups are obtained by means of association compounds of lactams with polyalcohols, optionally with water and optionally with further water-miscible organic solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.