Way to finish genuine leather

 

(57) Abstract:

The method refers to the leather industry and can be used when finishing chrome-tanned leather for Shoe uppers. On semi-finished leather consistently applied non-pigmented primer coating paint, hardener and contrasting floor. Non-pigmented primer contains 20% aqueous dispersion of a copolymer of vinylidenechloride, vinyl chloride and methacrylic acid in the ratio 18: 17: 65, penetrator and water. Top coat paint contains pigment concentrate, 20% aqueous dispersion of a copolymer of vinylidenechloride, vinyl chloride and methacrylic acid in the ratio 18:17:65, 40% aqueous dispersion of polyurethane additives and water. The method allows to obtain coatings on the skin with high performance properties and beautiful appearance. table 2.

The invention relates to the leather industry and can be used when finishing chrome-tanned leather for Shoe uppers.

There is a method of finishing of natural leather by successive deposition of layers of non-pigmented primer, pigmented primer and top coat paint, and in each of the layers impose additional dispersion of polyvinyl chloride obtained by the method of loginovo technical solution is the way to finish genuine leather by consecutive application of non-pigmented soil, containing, wt.%: acrylic emulsion, A 20% - 10, the variance of the MX-30 20% - 20, the penetrator - 4 and water - the rest, pigmented primer and coating paint containing, wt.%: pigmented concentrate - 9,8, casein 10% and 3.4, wax emulsion 20% to 1.5, acrylic emulsion BMP-3 20% to 17.6, the variance MH-30 20% - 23.5 and water - the rest, fixer and contrasting coverage [2].

A disadvantage of known methods is that they do not provide a coating on the skin with high performance properties.

The technical result of the invention is to improve the performance properties of the coating on the skin.

This result is achieved in that in the method of finishing of natural leather by consecutive application of non-pigmented ground-based polymer film-forming agent, a penetrator and water, surface-based paint pigmented hub, polymeric film-forming agent, additives and water, fixer and contrasting coverage, as the film-forming polymer in non-pigmented soil using aqueous dispersion of a copolymer of vinylidenechloride, vinyl chloride and methacrylic acid in the ratio 18:17:65 (VDVH MK-E) in the following ratio reed and methacrylic acid in the ratio 18:17:65 (VDVH MK-E) 20% - 25,0 - 35,0

The penetrator - 5,0 - 7,0

Water - the rest

but as the film-forming polymer in the coating paint, a mixture of aqueous dispersions of a copolymer of wikilinked, vinyl chloride and methacrylic acid in the ratio 18:17:65 (VDVH MK-E) and aqueous dispersion of polyurethane (Ikatan 1250 NF) in the following ratio of components, coating paint, wt.%:

Pigment concentrate - 15,0 - 20,0

Aqueous dispersion of a copolymer of vinylidenechloride, vinyl chloride and methacrylic acid in the ratio 18:17:65 (VDVH MK-E) 20% - 20,0 - 30,0

Aqueous dispersion of a polyurethane 40% - 25,0 - 35,0

Supplements - 15,0 - 20,0

Water - the rest

Introduction in the composition of non-pigmented primer and top coat paint as a polymeric film-forming aqueous dispersions VDH MK-I, containing not only carboxyl groups but also reactive vinylidene and vinyl groups in combination with the aqueous PU dispersion in coating paint contributes to the strong binding of these film-forming agents among themselves and with the functional groups of the protein of the skin, which improves the quality of finish and to improve the performance of the coating on the skin.

Introduction to the composition of the non-pigmented Grun allows to obtain coatings on the skin with high performance properties. The introduction of the non-pigmented soil VDH MK-E more to 35.0 wt. % and the introduction of the coating paint VDH MK-E more than 30.0 wt.% and dispersion PU more to 35.0 wt.% leads to a significant increase in the viscosity of the compositions, making them difficult to apply to the surface of the skin.

Synthesis of dispersion VDH MK-E carried out by the method of emulsion polymerization. Duration dosage monomer is 3 - 4 hours at 40 - 45oC. Loading monomers produced in the following sequence: first, enter vinylidenechloride and vinyl chloride. After 1 - 1.5 hours from the beginning of the synthesis add methacrylic acid. The ratio of monomers in the copolymer is 18:17:65.

The composition of the non-pigmented soil is prepared as follows: 20% water dispersion VDH MK-E sequentially mixed with the penetrator and water. The resulting mass is thoroughly mixed.

The composition of the coating paint is prepared as follows: 20% water dispersion VDH MK-E mixed with 40% aqueous dispersion of PU. In the resulting mass gradually with careful stirring of the pigment concentrate, additives and water.

The specific formulations of non-pigmented primer and finishing paint set is tanned with a polished outer surface. Consumption of soil 150 - 180 g/m2. After vacuum drying to the skin is applied coating paint of the composition, further pressed, fix the following composition, wt.%: Iefix WG - 50, Ikotun 1295 - 25, Vulfix - 1, water - the rest, after which the skin is applied contrasting coating of the following composition, wt.%: Icalc S 83 - 25, Icalc SMF - 17, Florentin PP - 3, Novilux 505, 2 - butyl acetate - other received skin pressed again.

The test results of physical-mechanical properties of coatings on the skin are shown in table 2.

Using the proposed method finishes natural leather will allow you to get coverage on the skin with high performance properties and beautiful appearance.

Way to finish genuine leather by consecutive application of non-pigmented ground-based polymer film-forming agent, a penetrator and water, coating paint-based pigment concentrate, a polymeric film-forming agent, additives and water, fixer and contrast coating, characterized in that as the film-forming polymer in non-pigmented soil using aqueous dispersion of a copolymer of vinylidenechloride, vinyl chloride and methacrylic acid in the ratio 18 : 17 : 65 is imilidenala, vinyl chloride and methacrylic acid in the ratio 18 : 17 : 65 (20%) - 25,0 - 35,0

The penetrator - 5,0 - 7,0

Water - the Rest

but as the film-forming polymer in the coating paint, a mixture of aqueous dispersion of a copolymer of vinylidenechloride, vinyl chloride and methacrylic acid in the ratio 18 : 17 : 65 and aqueous dispersion of polyurethane in the following ratio of components, coating paint, wt.%:

Pigment concentrate - 15,0 - 20,0

Aqueous dispersion of a copolymer of vinylidenechloride, vinyl chloride and methacrylic acid in the ratio 18 : 17 : 65 (20%) - 20,0 - 30,0

Aqueous dispersion of a polyurethane (40%) - 25,0 - 35,0

Supplements - 15,0 - 20,0

Water - Ostalnoe

 

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1 tbl, 5 ex

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EFFECT: improved quality of fur articles due to increased hair-to-skin tissue binding strength, resistance of hair coat against wear, and increased lifetime of clothes.

FIELD: leather industry.

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1 tbl, 5 ex

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EFFECT: facilitated procedure; increased amount of product.

1 tbl, 15 ex

FIELD: light industry; methods of forming of volumetric and curvilinear details for an article.

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EFFECT: the invention ensures improvement of quality of the articles made out of leather due to increased the form stability of components of the article.

4 cl

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1 tbl, 19 ex

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1 tbl, 6 ex

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13 cl, 1 dwg, 1 ex

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EFFECT: increased depth of paint penetration, improved quality of ready leather.

1 dwg, 1 tbl

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