Method of dyeing of fur skins oxidationin dyes

 

(57) Abstract:

The invention relates to an improved method of dyeing of fur skins oxidationin dyes, in which the fur skins are first treated with a metal stain containing acid and degreasing agent, and then paint. The acid in a metal stain using Glyoxylic acid and the treatment is carried out at pH 3 to 5. The technical result consists in simplifying the process while maintaining high performance characteristics of fur skins. 12 C.p. f-crystals.

The invention relates to a method of dyeing of fur skins oxidationin dyes.

Before dyeing using oxidation dyes fur skins need to handle, for it seemed that the hair (fur) fur skins otherwise absorb unevenly oxidation dyes. Still usually work the dyeing process was to begin with the process, which is called the transfer in handy for processing a form or "moreniem" (hair). This "umorea" should contribute to the further cleaning of the hair, therefore, to remove excess grease and dirt, to neutralize harmful acids and, in addition, is suitable manner translates the ate two different forms:

and/ umorea" dipping and

b/ umorea" smearing.

After the hair (wool) by morenia" sufficiently translated in handy for processing the form, skins before dyeing using oxidation dyes often treated even with protravnogo solution. In order mordant agent is giving the colors of light fastness, fastness to washing, stability during storage and resistance to sublimation. In addition, staining with pre-stain much more intense and stronger in color. As Bates used metal salts, mainly salts of chromium and iron, in rare cases, a salt of copper.

After mordant agent skins, if necessary, quickly rinse it, well then centrifuged and finally contribute to the dyeing bath. The above method is generally accepted and it can be found in the literature, for example Dr. W. Pense "Rauchwaren" Handbuch der Gerbereichemie und Lederfabrikation so 3, part 2, 1955.

From this publication it is known, in particular, the method of dyeing of fur skins oxidationin dyes, in which the fur skins are first treated with a metal stain containing acid and degreasing agent, and then paint.

This task is solved in that in the method of dyeing of fur skins oxidationin dyes, in which the fur skins are treated with a metal stain containing acid and degreasing agent, and then paint, according to the invention as an acid in a metal stain using Glyoxylic acid and the treatment is carried out at a pH of 3-5.

Suitable as a metal mordant agent to use an iron stain, chromic stain, copper stain, copper and iron stain, chromemenu the stain, the stain containing zhelezohromovye alum or stain containing megamalai alum.

As the metal salt in the chrome stain, you can use the dichromate potassium and/or sodium.

Metal stain contains 0.1 to 7 g metal salt per liter of protravel baths.

Chrome stain contains 0.1 to 7 g dichromate per liter of protravel baths.

As a degreasing agent in a metal stain use a simple polyglycidyl ether of fatty alcohol.

Metal stain contains 1-7 g Glyoxylic acid per liter of protravel baths. Glyoxylic Kalergi along with Glyoxylic acid other acids, preferably formic acid, acetic acid and/or glycolic acid.

The ratio of Glyoxylic acid, other acids is 9:1.

Treatment is carried out at 20-40oC for 3-24 hours.

Fur skins after staining centrifuged, and then bring in the dyeing bath.

Fur skins after staining before centrifugation rinse water.

After staining the fur pelts are dyed using known methods of dyeing oxidationin dyes, such as dyeing dipping or dyeing the anointing. Through the use of Glyoxylic acid in a metal stain, according to the proposed invention the method and dyeing of fur skins using oxidation dyes are achieved numerous benefits, which are listed below:

- achieved the best coverage spine when dyeing;

- increases the natural Shine of the hair fur;

- remaining in a metal stain the rest of dichromate reduced significantly,

- hardening subjected to the chrome tanning of the skin in colourings using a large amount of oxidant, for example, black and dark short film which gives at least 30-50% higher tensile strength compared to the usual subjected chrome stain fur skins;

the result is a clear deepening of tone in the case of dyed fur skins.

Examples of applications:

Example 1: color in black "mutation" mink /leather mink with 0.5 Cr2O3after finishing a rough draft/

Bath 1:20, based on the dry weight of the skins;

"Umorea" no,

Stain:

2.0 g/l of potassium dichromate,

1.5 ml/l of Glyoxylic acid /RFeliderm CS/;

0.5 g/l degreasing agent /RRemolgan CX/.

35oC, left in the tub overnight, centrifuged;

Dyeing: 3.0 g/l grey colour for the fur /RNako-Grau BK/

2.0 g/l of dye for fur /RNako H/;

2.0 g/l of the yellow colour for the fur /RNako-Gelb 3GA/

1.0 g/l of dye for fur /RNako TEG/

For oxidation is used in General to 8.0 ml of H2O2/ 30 wt.% -nogo /litre/ dye bath. Paint at the 35oC a total of 6 hours.

Result:

Compared with dyeing using preliminary "morenia and conventional staining is complete coverage of the spine. The undercoat of fur skins are completely black. In the case of the conventional method with the same amount of dichromate and the same amount of dye brown undercoat. ZV the main bath.

Leather side treated with Glyoxylic acid fur skins unequal soft and tougher to break than those processed in the usual ways of fur skins.

Comparative example 1:

Painting in black "mutation" mink /leather mink with 0.5% Cr2O3after finishing a rough draft/

Tub: 1:20, based on the dry weight of the skins;

"Umorea":

2.0 g/l of soda ash;

2.0 ml/l ammonia /25 wt.%-nogo/;

0.8 g/l degreasing agent /RRemolgan CX/,

32oC, 2 hours, rinse well, centrifuged;

Stain:

2.0 g/l of potassium dichromate;

1.0 ml/l glycolic acid 57%;

35oC, leave over night in the bath, centrifuged;

Staining: 3.0 g/l grey colour for the fur

/RNako - Grau BK/;

2.0 g/l of dye for fur /RNako H/;

2.0 g/l of the yellow colour for the fur /RNako-Gelb 3GA/;

2.0 g/l of a black dye fur /RNako - Schwarz RN/;

1.0 g/l of dye for fur /RNako TEG/.

For oxidation is used in General to 8.0 ml of hydrogen peroxide /30 wt.%-nogo/ per liter of dye bath. Paint at the 35oC for 6 hours.

Result:

Ity insufficient in the Noah bath.

Example 2:

Coloration dark brown black-brown Fox /the skin of a Fox with the content of 0.58% Cr2O3after finishing a rough draft/

Bath 1:40, based on the dry weight of the skins;

"Umorea" no;

Stain:

1.0 g/l of potassium dichromate;

1.5 ml/l of Glyoxylic acid /RFeliderm CS/;

0.5 g/l degreasing agent /RRemolgan CX/,

35oC, leave over night in the bath, centrifuged.

Dyeing:

2.0 g/l brown colour for the fur /RNako-Braun GG/;

1.6 g/l grey colour for the fur /RNako-Grau BK/;

1.0 g/l brown colour for the fur /RNako-Braun B/;

0.8 g/l of dye for fur /RNako H/.

For oxidation of use in General, 5.0 ml of hydrogen peroxide /30 wt.%-nogo/ per liter of dye bath. Paint at the 35oIn General 3.5 hours.

Result:

Compared with staining with preliminary "moreniem and a regular ProTrainer is full coverage barb. In the case of conventional methods with the same amount of dichromate and the same amount of dye staining is not strong enough. After staining the content of the dichromate is 11 mg/l protravel baths.

Side skin PR is the R conventional methods of fur skins.

Comparative example 2:

Coloration dark brown silver Fox /leather foxes with the content of 0.58% Cr2O3after finishing a rough draft/

Bath 1:40, based on the dry weight of the skins;

"Umorea":

3.0 g/l of soda ash;

3.0 ml/l ammonia /25 wt.%-nogo/;

0.8 g/l degreasing agent /RRemolgan CX/,

32oC, 2 hours, rinse well, centrifuged;

Stain:

1.0 g/l of potassium dichromate;

1.5 ml/l of Glyoxylic acid, 57%,

35oC, leave over night in the bath, centrifuged.

Dyeing:

2.0 g/l brown colour for the fur /3RNako-Braun GG/;

1.6 g/l grey colour for the fur /RNako Grau BK/;

1.0 g/l brown colour for the fur /RNako-Braun R/;

0.8 g/l of dye for fur /RNako H/.

For oxidation of use in General, 5.0 ml of hydrogen peroxide /30 wt.%-nogo/ per liter of dye bath.

Paint at the 35oC as a whole 3.5 hours.

Result:

The color is too light, floor barb incomplete. The content of dichromate at the end of the mordant agent is 478 mg/l protravel baths.

1. Method of dyeing of fur skins oxidationin dyes, in which m is then painted, characterized in that the acid in a metal stain using Glyoxylic acid and the treatment is carried out at pH 3 to 5.

2. The method according to p. 1, characterized in that the metal mordant agent use iron stain, chromic stain, copper stain, copper and iron stain, chromemenu the stain, the stain containing zhelezohromovye alum or stain containing megamalai alum.

3. The method according to p. 1 or 2, characterized in that the metal salt in the chrome stain using dichromate potassium and/or sodium.

4. The method according to any of paragraphs.1 to 3, characterized in that the metal stain contains 0.1 to 7 g metal salt per 1 liter of protravel baths.

5. The method according to p. 3, characterized in that the chromium stain contains 0.1 to 7 g dichromate per 1 l protravel baths.

6. The method according to PP.1 to 5, characterized in that, as a degreasing agent in a metal stain use a simple polyglycidyl ether of fatty alcohol.

7. The method according to any of paragraphs.1 - 6, characterized in that the metal stain contains 1 to 7 g of Glyoxylic acid per 1 l protravel baths.

8. The method according to PP.1 to 7, the second solution.

9. The method according to any of paragraphs.1 to 8, characterized in that the stain has along with Glyoxylic acid other acids, preferably formic acid, acetic acid and/or glycolic acid.

10. The method according to p. 9, characterized in that the ratio of glycolic acid other acids is 9 : 1.

11. The method according to PP.1 to 10, characterized in that the treatment is carried out at 20 - 40oC for 3 to 24 hours

12. The method according to PP. 1 - 11, characterized in that fur skins after etching centrifigul, and then bring in the dyeing bath.

13. The method according to p. 12, characterized in that fur skins after etching before centrifugation, rinsed with water.

 

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