Asymmetric 1:2 chromium complexes of monoazo compounds having 1-aryl-3-methyl-pyrazolone-5 coupling components
US4058514A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1975 |
| Grant date | Nov 15, 1977 |
| Priority date | — |
| Expiry date | Feb 24, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Asymmetric 1:2 chromium complexes of the formula ##STR1## in which R.sub.1 signifies a hydrogen or halogen atom or a nitro group, PA1 R.sub.2 signifies a hydrogen or halogen atom, a nitro or sulpho group, PA1 R.sub.3 signifies a hydrogen or halogen atom, or a lower alkyl radical, PA1 R.sub.4 signifies a hydrogen or halogen atom, a lower alkyl radical or a sulpho group, PA1 Each of R.sub.5, R.sub.6 and R.sub.7, independently, signifies a hydrogen or halogen atom or a lower alkyl radical, PA1 R signifies a hydrogen atom or a lower alkyl radical, and PA1 M.sup.+ signifies a cation, With the provisos PA1 I. the radicals R.sub.1 and R.sub.2 occupy the 4- and 6-positions, PA1 Ii. where R.sub.4 signifies a sulpho group one of the radicals R.sub.1 and R.sub.2 signifies a halogen atom or a nitro group in the 4-position, and PA1 Iii. the compounds contain a single sulpho group which is in free acid or salt form, for natural and synthetic polyamides, natural and regenerated cellulose, polyurethanes, basically modified polyolefins, leather and metals such as anodized aluminum. The dyes possess notable fastness to light, wet treatments, ironing, solvents, rubbing, chlorine, carbonizing and deca…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.