D - Textiles – Paper – 06 – P
Patent
D - Textiles, Paper
06
P
8/45
D06P 1/12 (2006.01) C09B 67/36 (2006.01) D06P 1/38 (2006.01)
Patent
CA 1111209
WATER-SOLUBLE DYEING COMPOSITIONS FOR THE PREPARATION OF ANIONIC FIBER-REACTIVE AZO DYESTUFFS AND THEIR USE FOR DYE- ING AND PRINTING Abstract of the disclosure: Novel, water-soluble dyeing compositions for the prepara- tion of anionic dyestuffs had been found which do not contain the azo dyestuffs themselves but their starting components. These dyeing components contain, or consist of, about stoichio- metrical amounts of a diazotizable aromatic amine, of a coupl- ing component and of an alkali metal nitrite, at least one of the diazo or coupling components or both contain a water- solu- bilizing, free acid group. The dyeing compositions may contain additionally buffer substances and dyeing auxiliaries as usual in the art. The dyeing compositions are capable of forming very easily, if mixed with or stirred into water, aqueous solu- tions of azo dyestuffs, and these solutions can already be used after a residence of 5 to 30 minutes for the preparation of dyeing baths, dyeing liquors and printing pastes for the dye- ing of fiber materials made of cellulose or derivatives there- of or of natural or synthetic polyamide fibers. In accordance with that, it had also been found a process for the coloring of fibers of said materials, wherein the composition is dis- solved in water, and the azo dyestuff solution obtained is modified by optionally adding buffer substances and usual dyeing auxiliaries to prepare a usual dyeing liquor or printing paste which is then applied on said fiber material, and the dyestuff is fixed by methods usual in the art.
292978
Landler Josef
Worfel Erhard
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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