Process for dyeing and printing

Details Process for dyeing and printing Process for dyeing and printing

1976-05-19

1977-12-27

Schofer, Joseph L.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 1E, 8 13, 8 21B, 8 21C, 8 22, 8 41A, 8 41B, 8 41C, 8 41D, 8 44, 8 45, 8 46, 8 47, 8 54, 8 542, D06P 138, C09B 2700, D06P 312

Patent

active

040652548

ABSTRACT:
A process for the dyeing and printing of leather and various textile material with developing dyestuffs is described wherein diazo salts and specific 6-membered, heterocyclic coupling components having one ring nitrogen atom especially of the pyridone and pyridine types are applied, the coupling process being independent of the pH-value, i.e. it can be performed with a range of ca. pH 2 to 12, preferably at room temperature so that this is possible not only in alkaline but also in neutral or acid medium, depending on the substrate, and in that it is possible with it to produce with only one of the coupling components by means of variation of diazo salts the whole color range from light yellow to black.

REFERENCES:
patent: 3471506 (1969-10-01), Lei
patent: 3729476 (1973-04-01), Austin et al.

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