Basic azo dyes
US4113718A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Apr 13, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B44/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A cationic azo dye of the formula ##STR1## wherein n is 0 or 1, Z represents a divalent radical which completes the ring A to form a 5- or 6-membered ring which can carry a fused and substituted or unsubstituted benzene ring and contain nitrogen, oxygen and/or sulphur atoms as ring atoms, Y represents a substituted or unsubstituted alkyl or aryl radical or preferably a hydrogen atom, X.sup..crclbar. represents an anion, R.sub.1 represents a substituted or unsubstituted alkyl or aryl radical, R.sub.2 represents a substituted or unsubstituted alkyl or benzyl radical, R.sub.3 represents a substituted or unsubstituted alkyl, aralkyl or aryl radical, R.sub.4 represents a group of the formulae --CN, --CONR.sub.5 R.sub.6 and --COOR.sub.7, wherein R.sub.5 and R.sub.6 represent hydrogen atoms or substituted or unsubstituted alkyl, aralkyl or aryl radicals, and R.sub.7 represents a substituted or unsubstituted alkyl or aryl radical, and R.sub.8 represents a substituted or unsubstituted alkyl or benzyl radical. The new dyestuffs dye polyacrylonitrile fibers in fast yellow shades.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.