SU111486A1 - Fur dyeing method - Google Patents

Description

The known method of oxidative dyeing of fur, in which dye appears as a result of the formation of dyes on the hair (in the process of dyeing), due to the joint oxidative condensation of various aromatic diamines, aminophenols, polyphenols and their derivatives. The disadvantage of this method is the duration of the production process, the lack of brightness of the colors, etc.

The known method of cubic dyeing of fur, however, it is associated with the necessity of using under conditions inter-gelatinous for fur, for example, high silkiness in the presence of reducing agents at the same time.

The proposed method of dyeing fur does not have the indicated drawbacks and is reduced to the formation of azo dyes on the hair in the process of dyeing by azo coupling, the diazo-composed slug being the diazotized keratin hair, a series of aromatic amino acid residues capable of diazotization.

The diazotised hair is easily subjected to an azo clip with various aromatic amino-hydroxy derivatives, with the result that azo dyes are formed in the hair.

As a result of exposure to light, the diazotized hair loses its ability to combine with azo-containing compounds and form azo dyes. This property is used to quickly and easily obtain light-resistant patterned dyeing of fur skins.

Fur shkhrki, which are made and finished to unpainted semi-finished product, are followed by the following processes:

1) Diazotization in a solution containing sodium nitrite –14 g1l, hydrochloric acid — 18 s / l, sodium chloride — 30; 1 l, at a temperature of 20–25 ° for 1 to 6 hours.

2) Wash.

3) Drying.

4) Oblcheyie through stencil grill.

The latter process is carried out in the case of dyeing fur with a patterned color. No. 111486-- 2 When dyeing fur into a flat monophonic color, mechanic skins are sent, mediocre, to the process of combining. ,, 5) Combination., Oruyadr in the origin of. iKc ,,; jj.5a.-jji: Horo shade, and, for example, in gzayyah following composition, in g1l: o-aminophenol - 10; nickel sulfate - 5 (for brown); p-phenyl enham1 by-10 (for temo-brown color); d-aminodiphenylamine-10 (for yellow); , 7-; Minonaftol-10 (for brown) with a liquid ratio of 20 and a temperature of 20-22 °, for 5 minutes. 6) For staining in an environment of gaseous ammonia at 28 ° for 5 minutes. 7) Drying. Application of the method of diazotizing animal fiber followed by azo coupling for monotone and patterned coloring of fur skins.