Composition for dyeing natural leather

C09B67/36 - Azoic dyestuff preparations
C09B45/16 - containing chromium

 

(57) Abstract:

Purpose: the composition is suitable for dyeing, finishing and toning products from genuine leather. The composition contains a dye - terazol based metallocomplexes dye in the organic solvent is 5 to 20%, ethyl or n-butyl 10 - 20%, lacquer-based solution or emulsion of cotton collocalia 7 - 25%, and ethyl acetate, the rest to 100%. The composition can reduce the thickness of top coat to preserve the natural face, and a natural neck skin after dyeing, as well as to improve the adhesion of the coating.

The invention relates to dyes for dyeing, finishing and toning products from genuine leather.

Known composition for finishing leather, containing wt.%: 17,5-18,5 of nitro enamel SC-583, and 15.2-16.3 nitrovarnish SC-573; 32-33 ethyl alcohol, 0.5 to 1.0 amine HB and 34.8-31.6 ethyl acetate [1]. The disadvantage of this composition is the formation of the solid film of a large thickness (more than 60 μm), giving products "plastic" look that violate the natural neck skin and reduce the adhesion of the coating.

In the known composition of the dye pigments are mainly inorganic, which can affect is how the composition of the paint, and the thickness of the coating. In the known composition of the coating thickness is determined by the total content of the nitro enamel and nitrovarnish. Reduction of the nitro enamel reduce the opacity of the paint due to the small extinction coefficient of inorganic pigments and consequently to increase the number of layers, i.e., the total coating thickness is not changed.

The purpose of the invention is reducing the thickness of the coating layer, the preservation of the natural front surface and a natural neck skin after dyeing and improve coating adhesion.

With the aim of obtaining a thin coating film, ensuring the conservation of the natural outer surface of the skin, known composition based on coloring matter, nitrovarnish, ethyl alcohol and ethyl acetate contains as a coloring substance metal complex dye in the liquid discharge form (terazol) with the following content, wt.%: Terazol 5-10 ethyl or n-butyl 10-20 Nitrovarnish SC-573, SC-556 7-15 or varnish e-SC-5183, uh-SC-542 20-25 ethyl Acetate Else

Cerasoli represent solutions of metal complex dyes in organic solvents [2].

Prepare the paint in the following way. In accordance with the formulations of the silt or ethyl and nitrovarnish SC-573, SC-556 or varnish e-SC-5183, uh-SC-542. After loading nitrovarnish or varnish solution is stirred for 30-40 min, then served on packing.

The finished paint is applied on the front surface of the natural leather spray, spread or pour 5-6 layers with intermediate drying at a temperature of 20-25aboutC for 10-15 minutes

P R I m e R 1. On the front primed surface dairy calf skin put a paint containing, wt.%: Terazol 5 ethyl Alcohol 10 Nitrovarnish SC-573 7 ethyl Acetate 78 When the ratio of the components is achieved by the following indicators: krivitski 200 g/m2the film thickness of 30-40 μm, natural look and neck skin, satisfactory adhesion of the film (after the accelerated test, there is a slight change in the integrity of the film).

P R I m m e R 2. On the front primed surface dairy calf skin put a paint containing, wt.%: Terazol 20 ethyl Alcohol 20 Nitrovarnish SC-573 15 ethyl Acetate 45 When the ratio of the components is achieved by the following indicators: krivitski 120 g/m2the film thickness of 20-30 μm, preserves the natural look and the neck skin, the adhesion of the film is good (on the film surface after the test not detected changes).

P R I m e R 3. On the front zagruntovat 68 When the ratio of the components is achieved by the following indicators: krivitski 150 g/m2the film thickness of 20-30 μm, natural appearance and neck skin, the adhesion is good.

P R I m e R 4. On the front primed surface dairy calf skin put a paint containing, wt.%: Terazol 20 Alcohol n-butyl 10 Lac e-SC-5183 20 ethyl Acetate 65 When the ratio of the components is achieved by the following indicators: krivitski 100 g/m2the film thickness of 15-20 μm, natural appearance and neck skin, the adhesion is good.

P R I m e R 5. On the front primed surface dairy calf skin put a paint containing, wt.%: Terazol 5 Alcohol n-butyl 20 Lac e-SC-5183 25 ethyl Acetate 35 When the ratio of the components is achieved by the following indicators: krivitski 150 g/m2the film thickness of 30-40 μm, natural appearance and neck skin, the adhesion is satisfactory.

P R I m e R 6. On the front primed the skin surface causing the paint containing, wt.%: Terazol 10 Alcohol n-butyl 12 Lac e-SC-5183 23 55 ethyl Acetate In the ratio of the components is achieved by the following indicators: krivitski 150 g/m2the film thickness of 20-30 μm, natural appearance and neck skin, the adhesion is good.

P R I m e R 7. On the front primed the skin surface causing the paint containing, by weight. % : Terazol 10: krivitski 150 g/m2the film thickness of 20-30 μm, natural appearance and neck skin, the adhesion is good.

P R I m e R 8. On the front primed the skin surface causing the paint containing wt.%: Terazol 10 ethyl Alcohol 10 Lux e-SC-542 20 ethyl Acetate 60 When the ratio of the components is achieved by the following indicators: krivitski 100 g/m2the film thickness of 15-20 μm, natural appearance and neck skin, the adhesion is good.

P R I m e R 9. On the front primed the skin surface causing the paint containing wt.%: Terazol 10 Alcohol n-butyl 10 Nitrovarnish SC-556 15 ethyl Acetate 65 When the ratio of the components is achieved by the following indicators: krivitski 120 g/m2the film thickness of 20-30 μm, natural appearance and neck skin, the adhesion is good.

P R I m e R 10. On the front primed the skin surface causing the paint containing, wt.%: Terazol 10 Alcohol n-butyl 10 Nitrovarnish SC-573 10 ethyl Acetate 70 When the ratio of the components is achieved by the following indicators: krivitski 150 g/m2the film thickness of 20-30 μm, natural appearance and neck skin, the adhesion is good.

COMPOSITION FOR DYEING NATURAL LEATHER containing dye, nail Polish, alcohol and ethyl acetate, characterized in that the of rasites in an organic solvent, as a nail Polish - lacquer-based solution or emulsion of cotton ColleXion, and as alcohol is ethyl or n-butyl alcohol in the following ratio, wt.%:

Terazol - 5 - 20

Ethyl or n-butyl alcohol - 10 - 20

Lacquer-based solution or emulsion of cotton ColleXion - 7 - 25

The Ethyl Acetate - Rest

 

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The invention relates to dyes and can be used in the production of pigment concentrates of black color for dyeing leather

FIELD: physical method for leather staining.

SUBSTANCE: claimed simplified method includes spraying of dyeing composition, containing (mass %): diphenylamine 0.3-2.0; tetrabromomethan 5.0-10.0; α-naphthol 0.01-0.03; and balance: methyl methacrylate-based varnish, onto the leather face, followed by ultraviolet exposure with wave-length of 300-400 nm at 25-300C for 0.5-1.0 min. Ferrocene and/or indole may be added in dyeing composition to complete color variety.

EFFECT: leather with improved hydrophobicity and physicochemical resistance.

2 cl, 2 tbl, 3 ex

FIELD: leather industry.

SUBSTANCE: invention relates to area of dyeboarding operations in leather production, in particular to a method of dyeing genuine leather with active dyes including intermediate product neutralization, active dye dyeing and subsequent fixation with alkaline reagent. According to invention, neutralization is effected in presence of preparation "Deep Dying" in amount 4.5-5.0% of the weight of planned leathers, dyeing is effected with active dye consumed in amount 2.5-5% at medium pH 3.4-3.5 in presence of 0.9-1.2 g/L alizarin oil, and fixation of dye is performed simultaneously with greasing at medium pH 8.5-8.9 with sodium hydrocarbonate consumed in amount 1.3-1.8%, greasing composition in amount 3.8-4.2%, and "Polinap AD" in amount 1.8-2.2 of the weight of planned leathers. Finally leather is rinsed in presence of nonionic surfactant consumed in amount 0.8-1.2 g/L.

EFFECT: optimized dyeing composition and dyeing conditions.

1 tbl, 9 ex

FIELD: tanning industry.

SUBSTANCE: process is conducted in vertical mill to which soot, induline, kerosene and diesel fuel are introduced. Then components are mixed and slow heating the apparatus and its content is started after which mixing is switched off and slow heating of mill content is continued. Upon expiration of said time, acids or their compositions, white spirit and fatty additive are introduced and chemical mass-exchange process is performed at spontaneously fixed temperature due to thermal effects of this process and natural cooling at the beginning and at the end, as well as due to forced cooling at intermediate stage characterized by high rates of temperature at maximum of 140-150°C. At the moment when forced cooling is discontinued, 0.5-1.5 h before discontinuation of mixing and beginning of withdrawal at temperature of 80-115°C, 43-52-% solution of aluminum salts and C10-C20 of carboxylic acids is introduced into product being prepared.

EFFECT: facilitated procedure; increased amount of product.

1 tbl, 15 ex

FIELD: leather industry.

SUBSTANCE: preparation of composition is conducted on vertical-type bead mill. Induline, kerosene, and diesel fuel are consecutively charged into mill before stirring mechanism is energized, after which apparatus and contents thereof are slowly heated. Stirring is then stopped for 1 h while slow heating of mill contents is continued. When specified time expires, carboxylic acid or acid mixture, white spirit, fat additive, and aluminum oxide or hydroxide are added. Mechanic stirring is then switched on and contents of the bead mill are ground and the process is carried out at spontaneously fixed temperature caused by heat effects of the processes and natural cooling. When temperature is lowered to 85-120°C, desired product is discharged.

EFFECT: simplified process and increased product discharge degree.

1 tbl, 19 ex

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