SU992582A1 - Leather dressing composition - Google Patents

Description

(54) COMPOSITION FOR LEATHER FINISH

BACKGROUND OF THE INVENTION The invention relates to light industry and can be used in leather production in leather finishing.

Closest to the present invention is a skin finishing composition comprising an acrylic polymer or copolymer dispersion, aniline dye, a penetrator and tl additives.

A disadvantage of the known composition is that its use does not ensure the production of skins with high-quality indicators.

The purpose of the invention is to improve the quality of leather.

This goal is achieved in that the skin finishing composition, including a dispersion of an acrylic polymer or copolymer, an aniline dye, a penetrator and additives, as an aniline dye, contains a dispersion; water-insoluble dye, and as additives - glycazine and a mixture of quaternary salts of diethylaminomethyl diglycol ether of higher fatty alcohols, with the following ratio of components, wt.%;

Acrylic polymer dispersion

or copolymer 25-36

Disperse waterproof

1,5-8,0 dye 1,0-2,0 Penetrator

5-8 Rlicasin A mixture of quaternary salts of diethylaminomethyl diglycol

10 esters of higher fat1, 5-3.0% alcohols Else Water

In addition, the proposed composition; in order to expand the range of colors,

15 additionally contains a pigment concentrate, in the amount of 15-35 .-%.

In the proposed composition, dispersants are used in the aqueous medium to disperse dyes and to obtain homogeneous pastes; reagents are used which are simultaneously modifiers of the PELLA film on the skin, obtained on the basis of acrylic polymer dispersions and copolymers.

As a dispersant of disperse dyes, Alcamon-OC-2-cationic drug is used - a mixture of quaternary salts of diethylaminomethyl 30 diglycone ether of higher fatty acids.

alcohols, which is a plasticizer for the coating film on the skin.

A mixture of ethylene glycol ethers of triethytramethylolamines is introduced into the composition of the working solution - the preparation glycazine, which is a thermosetting agent and allows to modify the film on the skin based on acrylic polymers and copolymers (to increase heat resistance, hardness, resistance to abrasion), to increase the uniform distribution of the dispersed dye in the working solution, fix the dye after drying the coating on the skin, eliminate its migration in the coating, emphasize the aniline effect. semi-., aniline finish leather, eliminate the oiliness of the skin, as much as possible to keep its neck, get a smooth, uniform in color film.

To obtain a semi-aniline effect. Tie. .expansion of colors, the composition, in addition to the dispersed color of the system, introduces a pigment concentrate

The burner, finished using the proposed composition, has a harnessed appearance, a smooth front surface with high indicators of resistance to dry and wet friction, to light exposure,

Films with dispersed dyes obtained from the proposed composition do not change their color under the influence of daylight and sunlight (observation for 1 year).

In tab. 1-3 dan proposed set ..

The composition is prepared as follows.

The dispersed dye is rubbed with Alconim OC-2 until a homogeneous mass is obtained, then gsticasin and water are added with stirring. Dispersion of the film former, or pigment concentrate, is added to the resulting mixture, followed by the film former dispersion.

The composition coats the skin well and is easily applied with both brushes and spraying.

Example 1. Aniline finishing facial unpolished leather. On the skin prepared for finishing, a brush applied primer consisting of 2/3 of the proposed composition (Table 2) and 1/3 of the impregnating primer of 1 and 2 wt.% (The proposed composition is used both independently and with the introduction of impregnating soil.

The use of such soils is provided for by existing methods;

Acrylic emulsion A (20%) 45 Ethyl cellosolve 10 Water 45

Acrylic zemulsi A (20%) 45

Penetrator PN-ES 15 Voda40

Consumption of working solution 60 g / m. Then, after drying at and at a pressure of 100 atm, the proposed composition (options a, b, c) is applied by spraying 3-4 times with 20–35 g of the working solution per m of skin until covering.

Covered and dried skin is fixed with nitro lacquer or nitro emulsion lacquer according to current methods with intermediate pressing at 70 ° C and pressure of 150 atm.

Example 2. Semi-aniline finish facial unpolished leather. A primer consisting of 2/3 of the proposed composition (Table 3) and 1/3 of the impregnating primer of composition 1 or 2, in May.%, Is applied to the skin prepared for finishing.

Acrylic emulsion A (20%) 45 Ethyl cellosolve 10 Water45 Consumption of JO working solution g / m Acrylic emulsion (20%) 45 Penetrator PN-ES 15 Water40 Workflow consumption 70 g / m. Then, the proposed composition (variants a, b, c) is applied twice by spraying at a rate of 30 g / m. After drying, the skin is pressed at 70 ° C and a pressure of 100 atm. Then there is a lay-up for 12 hours and an embossing on a hydraulic press with a pulverulent plate at 50 BO ° C and a pressure of 150 atm, after which the same composition is applied by spraying twice, at a rate of 20 g / m to opacity. Covered and dried skin is fixed with nitro lacquer or nitro emulsion lacquer according to current methods with intermediate pressing at. 70C and a pressure of 150 atm.

Example 3. Semi-aniline finish with a two-color effect for; ground; skins (nut-colored, light brown, brown). Finishing before applying spray coating paint inclusively is made according to a standard procedure, then a contrast mixture is applied by spraying (composition according to option 1 a, b, c), the color of the dye is contrasting in color to the previous coating , twice the flow rate of 15 g / m. Dried skin is fixed with nitrolacco or nitroemulsion lacquer according to current procedures.

The dyes used in the proposed composition are dispersed, insoluble in water. By giving the coating a proper coloration, they positively affect the properties of the leathers; in addition, the use of the proposed composition for finishing makes it possible to obtain fashionable ranges of skin colors with a smaller coating film thickness, its high performance properties, higher grade and physico-mechanical properties of the skin. (in comparison with the skin treated with the prototype). In tab. 4 given the properties of the coating film on the skin and the properties of the skin.

The application of the proposed composition allows increasing the hiding power and depth, purity and saturation of the tone of the coating film on the skin due to the improvement of the film-forming conditions during the drying of the component applied to the skin:

Film former (dispersion of acrylic polymer or copolymer)

I Disperse water-insoluble dye or

Disperse water-insoluble dye

Glycazin

Alcamon OS-2

Water

positions, get aniline and semi-aniline finishing effect; give the necessary shine to the coating and improve the appearance of the skin; create favorable pressing conditions

skin in the process of finishing, preventing the skin from sticking to the press; increase the resistance of the coating, making it resistant to hot conditions; vulcanization of shoes; eliminate the use of formalin; eliminate the characteristic for leather, trimmed with the use of individual polymeric binder, oiliness, give it a natural neck; increase sustainability

coating to dry and wet friction.

Table

30.5 36

30.5 36 25

eight

3

45 Coating film indexes Resistance to wet friction, 554,571. 564 60 turns Resistance to repeated bending, IPK-2 points

Film thickness, mg / dm 170

112 230

158

Heat resistance, points Skin permeability 23%, 727,531.0%,% 10,611,412.3 Vapor pressure,% 8,910,811.1 Vapor loss,% Durability limit at stretching 1, 89 1,872.00 NII, 10 MPa

Table 3

Table 4

205

247

200 5 685 598 235 200 Not lower than 3 0.622.123.919.7 9.710.110.510.1 8.79.2 9.4 9.2 2.051.96 1.81 1.71 1.6 Stress due to the appearance of cracks in the facial layer of the skin, 10 MPa 1.81 1.72 1.84 Elongation under stress, 10 MPa,% 33,231,730.0: Skin grade,% I per grade 88.6 88.4 88.1 units

Claims (2)

Claims 1. A leather finishing composition comprising an acrylic polymer dispersion or copolymer, aniline dye, a penetrator and additives, so that, with the aim of improving the quality of leather, as aniline dye, it contains a dispersed non-insoluble dye, and as additives, glycacia and a mixture of quaternary salts of diethyl1 "schmomethyldiglycol ether of higher fatty alcohols in the following ratio, wt.%: Dispersing acrylo-. polymer or copolymer25-36 Disperse water-soluble dye -1,5-8,0 i Continued tae5l, 4 Penetrator1.0-2.0 25 Glycazin5-8 A mixture of quaternary salts of diethyl1 minomethyl diglycol ether of high fatty alcohol; comrade 1.5-3.0 WaterEverything 2. Sostan according to claim 1, I distinguish, u and with the fact that, in order to expand the range of colors, it additionally contains a pigment concentrate in an amount of 15-35 wt.%. Sources of information 40 taken into account in the examination 1. Authors certificate of the USSR 389136, cl. C 14 C 11/00, 1972 (prototype). 1.89 1.85 1.76 1.49 1.3 28.9 .31.4. 32.8 34.2 20-35 88.9 88.4 88.6 86.3