The composition of the fixer finishing coatings on the skin

 

(57) Abstract:

Usage: when covering dyeing for fastening of the top coating on the skin. The inventive composition fixer finishing coatings on the skin contains the following components, wt.%: pigment concentrate 1,0 - 2,0, 20% wax emulsion of 3.0 to 8.0, 40% aqueous dispersion of a copolymer of butyl acrylate and Acrylonitrile in the ratio 64: 36 (VAK-201) 23,0 - 33,0, 17%-percent aqueous dispersion of a copolymer of acrylate and nitrolicious acid in the ratio of 22:78 (HAC-202) 4,0 - 15,0 water and rest. table 2.

The invention relates to the leather industry and can be used in coating dyeing for fastening of the top coating on the skin.

Known composition fixer finishing coating on the skin, containing, by weight. waste is homogeneous acetylation of the polyvinyl alcohol (mol.weight 42000 48000 content 40 48% Buturlina groups and 3 to 5% of the acetate groups 5 7, acetylacetone 0,02 0,42, wax emulsion 0,03 0,7, esters of normal alcohols fraction C7C8and orthophthalic acid of 0.1 to 0.56 water 10 to 20 and the mixture of ethyl alcohol and butyl acetate in a ratio of 1:1 rest [1]

The disadvantage of this film is that its explosion in the shops.

The closest analogue of the proposed technical solution is the composition of the fixer finishing coating on the skin, containing, by weight. counting on the dry matter: pigment concentrate 1,0 1,2, acrylic emulsion (BMP-5P - 2,0 2,1, acrylic emulsion BM-12 2,0 2,1, wax emulsion 0,4 0,6 and water the rest [2]

The disadvantage of this film is that it is not possible to obtain a coating with a high resistance to wet and dry rubbing.

The technical result of the invention is to improve the stability of the coating to wet and dry rubbing.

This result is achieved by the fact that the composition of the fixer finishing coating on the skin, including pigment concentrate, a wax emulsion, acrylate binders and water, as acrylate film contains an aqueous dispersion of a copolymer of butyl acrylate and Acrylonitrile in a ratio of 64:36, and an aqueous dispersion of a copolymer of acrylate and nitrolicious acid in the ratio of 22:78 in the following ratio, wt.

Pigment concentrate 1,0 2,0

Wax emulsion (20%) 3,0 8,0

Aqueous dispersion of a copolymer of butyl acrylate and Acrylonitrile in the ratio 64:36 (HAC-201) (40%) 23,0 33,0

In Water the Rest

The introduction of the fixer as acrylate film-forming aqueous dispersions of HAC-201 and HAC-202, in addition to containing carboxyl groups reactive nitrile group enhances binding fixer with the functional groups of binders included in the upper layers of the coating, which improves the stability of the coating film to wet and dry rubbing.

Introduction aqueous dispersions of HAC-201 and HAC-202 less 23,0 wt. and 4.0 wt. does not increase resistance of the coating to wet and dry friction, the introduction of their respective more than 33.0 wt. and 15.0 wt. it is impractical, because of the further increase of these indicators does not occur.

Synthesis of dispersions of copolymers of HAC-201 and HAC-202 is performed by the method of emulsion polymerization. Duration dosage monomers is 5.0 to 5.5 h at 70 75oC. After the introduction of the monomers add the stabilizer dispersion of alkylsulfonate sodium and give a shutter speed of 30 to 40 minutes, the Ratio of monomers of butyl acrylate and Acrylonitrile in the dispersion of HAC-201 is 64: 36 ratio of acrylate and nitrolicious acid in the dispersion of HAC-202 22:78.

The composition is prepared as follows: 17% water dispersion is added 20% wax emulsion, pigment concentrate and water.

Specific examples of the compounds represented in table.1.

These compositions fixer spray applied on finished to the standard methodology of the skin after application of the coating paint obtained skin pressed. The flow rate of 100 to 120 g/m2.

The results of the skin test are given in table.2.

Using the proposed composition of the fixer will improve the quality finishes of natural skin and to obtain a coating with a high resistance to wet and dry rubbing.

The composition of the fixer finishing coating on the skin, including pigment concentrate, a wax emulsion, acrylate binders and water, characterized in that as the acrylate film-forming agents it contains the aqueous dispersion of a copolymer of butyl acrylate and Acrylonitrile in a ratio of 64 36 and the aqueous dispersion of a copolymer of acrylate and nitrolicious acid in the ratio of 22 to 78 in the following ratio, wt.

Pigment concentrate 1 2

Wax emulsion 20% 3 8

Aqueous dispersion of a copolymer of butyl acrylate and Acrylonitrile in a ratio of 64 36 40% 23 33

Aqueous dispersion of a copolymer of acrylate and nitrolicious

 

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