SU992581A1 - Composition for painting leather - Google Patents

Description

one

The invention relates to light industry and can be used in leather production for leather finishing.

The closest to the present invention is a composition for coating dyeing of leather, including a pigment concentrate, a wax emulsion, a copolymer of methyl acrylate, butyl acrylate and methacrylic acid, a copolymer of divinyl with methyl methacrylate and voAU 1 1

However, the known composition does not allow to obtain a skin coating with a sufficiently high heat resistance required in the process of making shoes.

The purpose of the invention is to increase the heat resistance of the coating.

This goal is achieved in that the composition comprising a pigment concentrate, wax emulsion, copolymer of methyl acrylate, butyl acrylate and methacrylic acid, is a copolymer

; divinyl with methyl methacrylate and water, additionally contains a copolymer of St (foul, ethyl ester of acrylic acid and methacrylic acid at a ratio of 53: 32:15, respectively, in the following ratio of components, masd: when calculated on the dry residue:

Pigment concentrate, 88 Wax emulsion 1.70-1.9

10 Copolymer of methyl acrylate, butyl acrylate and methacrylic acid3; 20-6, 8U

IS A copolymer of divinyl with methyl methacrylate 3,20-3, W A copolymer of st1fol, ethyl ester of acrylic acid and met20 of acrylic acid at their ratio of, respectively, 53:32:15 0.53-3.23 Water The remaining 3992 B1D in the proposed composition of styr ( 1 acrylate latex leads to Toiv that the carboxyl groups of the MBM-3 emulsion, the DMMA-65-HP latex, and the 11-acrylate latex interact with each other through zinc ions, which are introduced into styrene acrylate-C-dH2 (-clHE- (iH2c) (-c: Hz) iH-dooeHH9) n latex in the form of zinc chelate as a catalyst, leading to structuring polymers composition, can significantly increase the heat resistance of the coating and reduce its stickiness. The structuring process is as follows: Composition is prepared as follows. Pigment paste based on pigment or mixture of pigments is mixed with a 20% aqueous solution of a wax emulsion. gradually but with thorough mixing, the prepared mixture of Latacris IOt styrene acrylate latex and 20% aqueous MBM-3 and DMMA-65-GP emulsions are added and diluted with water to a temperature not higher than 18-20 0 until necessary d- dH2 - (- ciH2- (iH: -cJooeH3) (ciH2-te-clH-eH2) - dHa. Ing-en .- L C-dHz-dn With ogN5LLcJeHsJ my density of the solution of coating paint. Technological use of the composition is as follows. In the process of finishing on the MAFA aggregate, the top coat is applied twice to the skin, then the skin is pressed and the paint is also applied twice to the MAP unit, after which the skin is subjected to npeccoBaHVM and anchorage. Ta6ni 1 provides examples of the specific use of the composition.

The composition of example 1 is treated with a skin with a natural front surface of the skins of the bull; in example 2 - leather with polished. the front surface, developed from the agile light; in example 3 - leather with a polished face of the surface, developed from the cleverly.

Further operations are carried out according to a standard procedure.

As a result of treating the leathers according to examples 1-3, leathers of a similar appearance with leather-like groping and a thin covering film, which has high physicomechanical properties, were obtained.

indicators.

Comparative analysis of the properties of the coating film and the film obtained on the skin using a known paint composition is presented in Table. 2. T and l and 2

for leather finishing, it will be possible to increase the heat resistance of the coating up to 120 ° C, to completely eliminate its stickiness during the leather finishing process and to maintain a high index of resistance of the coating to repeated bending. The composition for coating dyeing of leather, including a pigment concentrate, a wax emulsion, a copolymer of methyl acrylate, butyl acrylate and methacrylic acid, a copolymer of divinyl with me79925 tilmethacrylate and water, in order to increase the heat resistance of the coating, it additionally contains a copolymer of styrene, ethyl ester of acrylic acid 5 lots and methacrylic acid at a ratio of 53.32: 15, respectively, in the following ratio of components, by weight, in terms of dry residue: in Pigment concentrate 5.20-6.88 Wax emulsion 1.70-1.9 Copolymer of methyl acrylate, butyl acrylate, and methacrylic acid 3.20-6.8A Copolymer of divinyl with methyl methacrylate 3.20-3, Copolymer of styrene, ethyl ester of acrylic acids and. methacrylic acid at their ratio, respectively; 0.53-3.23 53:32:15 Water; The rest Sources of information that are considered in the examination 1. 1. Author's witness in the USSR 76813, cl. D About R 3/32, 1979 type).

Claims (1)

Claim Composition for coating dyeing of leathers, including a pigment concentrate, a wax emulsion, a copolymer of methyl acrylate, butyl acrylate and methacrylic acid, a copolymer of divinyl with methyl 7 992581 methyl methacrylate and water, so that in order to increase the heat resistance of the coating, it additionally contains a copolymer of styrene, ethyl ester of acrylic acid · 5 lots and methacrylic acid with a ratio of 53 * 32: 15, respectively, with the following ratio of components, wt.%, calculated on the dry residue: I · Pigment concentrate 5.20-6.88 Wax emulsion 1.70-1.94 The copolymer of methyl acrylate, butyl acrylate, and methacrylic acid _ _ * 5 you 3.20-6.84 Methyl methacrylate divinyl copolymer 3.20-3.44 Styrene copolymer, ethyl ester ak- rilic acid and methacrylic acid you at their relationship research institutes respectively 0.53; 3.23 53:32:15 Water Rest