EP 0121227 B1 19870107 - PROCESS FOR REOXIDIZING DYEINGS WITH SULPHUR DYES
Title (en)
PROCESS FOR REOXIDIZING DYEINGS WITH SULPHUR DYES
Publication
Application
Priority
- DE 3312162 A 19830402
- DE 3338267 A 19831021
Abstract (en)
[origin: US4488880A] The reoxidation of sulfur dyestuffs in an acid medium is associated with disadvantages, such as pollution of the environment, the risk of corrosion on equipment etc. Admittedly oxidation in an alkaline medium does not have these disadvantages, but it is, in turn, more difficult to control (dependence on pH and constancy of color shade). These difficulties are eliminated in accordance with the invention if the textile material containing cellulose fibers which has the sulfur dyestuffs in the reduced form applied and fixed thereto is subjected to the oxidative action of sodium benzenesulfochloroamide or p-toluenesulfochloroamide under alkaline conditions in order to develop the dyestuff. This can be carried out either continuously or discontinuously.
IPC 1-7
IPC 8 full level
D06P 1/22 (2006.01); D06P 1/30 (2006.01); D06P 5/06 (2006.01)
CPC (source: EP US)
D06P 1/222 (2013.01 - EP US); D06P 1/30 (2013.01 - EP US); Y10S 8/918 (2013.01 - US)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0121227 A2 19841010; EP 0121227 A3 19841205; EP 0121227 B1 19870107; DE 3461940 D1 19870212; US 4488880 A 19841218
DOCDB simple family (application)
EP 84103399 A 19840328; DE 3461940 T 19840328; US 59468184 A 19840329