Concentrated solutions of anionic dyestuffs
US3995997A · kind A · utility
16Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1974 |
| Grant date | Dec 7, 1976 |
| Priority date | — |
| Expiry date | Aug 8, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/901
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Anionic dyestuffs which contain as the cation at least one cation of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 denote alkyl with 1-6 C-atoms, cycloalkyl with 5-7 C-atoms or aralkyl with 7-12 C-atoms or represent a group ##STR2## wherein R.sub.4 and R.sub.5 denote hydrogen, methyl or ethyl and PA1 n represents the numbers 1-20 PA1 Are suitable for the preparation of storage-stable, water-miscible, concentrated solutions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.