Disazo and trisazo compounds having a 3-pyridinium or substituted pyridinium-4-methyl-6-hydroxypyridone-2 coupling component radical
US4213897A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1978 |
| Grant date | Jul 22, 1980 |
| Priority date | — |
| Expiry date | Mar 8, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B44/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sulfo group-free basic disazo and trisazo dyes of the formula ##STR1## wherein R is hydrogen; unsubstituted C.sub.1-4 alkyl; C.sub.2-4 -alkyl monosubstituted by hydroxy, the hydroxy being on other than the .alpha.-carbon atom; di-(C.sub.1-4 alkyl)amino or --CH.sub.2).sub.n Ko, PA1 R.sub.1 is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 hydroxyalkyl or C.sub.1-4 alkoxy, PA1 n is 2 or 3, PA1 Ko is --N(CH.sub.3).sub.2, --N.sup..sym. (CH.sub.3).sub.3 A.sup..crclbar., --N.sup..sym. (CH.sub.3).sub.2 CH.sub.2 CH.sub.2 OH A.sup..crclbar. or ##STR2## each A.sup..crclbar. is an anion, Zo is a direct bond or a bridging group, and PA1 Kx is a radical of a coupling component of the pyrazolone-5,5-aminopyrazole, .beta.-naphthol, .alpha.-naphthol, aniline, phenol or acetoacetylphenylamide series or the radical of barbituric acid, dimedone or a dimedone carboxylic acid ester, which compounds, where Kx is a radical of a coupling component of the pyrazolone-5,5-aminopyrazole, .beta.-naphthol, .alpha.-naphthol, aniline, phenol or acetoacetylphenylamide series, contain 1, 2 or 3 basic groups or, where Kx is the radical of barbituric acid, dimedone or a dimedone carboxylic acid ester, contain 1 or 2 basic grou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.