Cationic oxazine dyes
US4289880A · kind A · utility
2Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1979 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | Jul 11, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B19/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There are described new blue cationic oxazine dyes of the formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another are each C.sub.1-4 -alkyl, with R.sub.1 and R.sub.2 together with the nitrogen atom also being able to form a heterocyclic ring, and X.sup..crclbar. is an anion; these dyes are distinguished in particular by an excellent migration capacity on polyacrylonitrile fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.