Fiber-reactive, water-soluble disazo dyes containing an N-B-sulfoethylamide group
US3951944A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1972 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Nov 29, 1992 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B31/025
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dyestuffs of the formula (1) ##SPC1## Wherein A is an optionally substituted radical of the benzene or naphthalene series which, however, does not contain a sulfonic acid group, B is the radical of a coupling component of the benzene, naphthalene, pyrazolone, aminopyrazole, hydroxyquinoline or aceto-acetyl-arylamide series, which, however, does not contain a sulfonic acid group, and R is hydrogen or the lower alkyl. These dyestuffs are very well water-soluble in spite of having a high molecular weight and containing only one sulfonic acid group. They are especially suitable for dyeing or printing materials of natural and synthetic nitrogen-containing fibers, such as wool, silk, polyamide or polyurethane fibers, preferably if dyed from an acid to neutral dye bath. They show a very good colour buildup and migration power when being applied on the material mentioned which allows to obtain even dyeings of good fastnesses to light and to wet processing, for example, to washing and to perspiration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.