DE767809C - Process for the production of glossy coatings on leather, synthetic leather, vulcanized fiber or cardboard - Google Patents

Description

Process for the production of glossy coatings on leather, artificial leather, Vulcanized fiber or cardboard It is known to have glossy coatings on fibrous materials, such as leather, synthetic leather, vulcanized fiber, cardboard, using protein substances such as Albumin and casein, manufacture, These materials, also with pigments or Aniline dyes and plasticizers, shellac solutions or wax emulsions may contain, but have the disadvantage that they are alkaline, because of the Dissolving, especially of casein and shellac, alkalis are necessary. Also can Gradations in the viscosity of these natural products are not readily obtained will. In many cases, however, the final effect depends on the viscosity of the coating agent depends significantly, the low possibility of variation is a disadvantage.

It has now been found that shiny coatings on leather, artificial leather, Vulcanized fiber and cardboard are obtained by using solutions of salts from the copolymers applies unsaturated carboxylic acids and vinyl compounds and in the usual way Creates shine.

For the present process, for example, the water-soluble Alkali, ammonium and amine salts of copolymers of crotonic acids, α-methacrylic acid, Tetrahydrophthalic acid, Maleic acid and vinyl esters, such as vinyl acetate, or vin, ether, vie vinyl methyl ether, Vinyl butyl ether or other vinyl compounds, such as styrene, are suitable. Depending on the selection the isomponents and the conduct of the polymerization are different to achieve Degree of gloss effect possible. The solutions of salts of the copolymers react neutral and resistant to alkali. By suitable choice of the components and The polymerization process allows copolymers of different viscosities to be used produce.

The water and rubbing fastness of the coatings produced in this way is evident a wake treatment with formaldehyde or mixtures of formaldehyde with metal salts, such as chromium or aluminum salts, can be improved.

The copolymers mentioned can be used alone or in combination used with other binding and finishing agents; for example be x-ice called water- or alkali-soluble proteins, water-soluble cellulose compounds, synthetic resin carboxylic acids and water-soluble or emulsifiable in water Synthetic resins. By adding water-soluble plasticizers, such as glycerine, Polyglycerine, or of emulsions of fats and oils l; ann the softness and The suppleness of the coatings varies. Due to the dispersing effect In the wiping polls it is possible that waxes, natural resins, fats and oils The finishes can be added without further ado, as was the case with those previously used Protein is not always possible.

It is already known to apply coatings to leather with solutions of salts to produce ron copolymers. It is surprising, however, that it succeeds to shine such coatings with good success while it is with anode; ren polymerization products, like polyvinyl chloride or polyvinyl acetate, glossy coatings are not possible to obtain.

Examples I, A water soluble top paint for leather is as follows prepared: 80 g of a 6% solution of the sodium salt of the copolymerization product from styrene and maleic anhydride, 25 g of a 20 ° foigen solution of the ammonium salt of the polymerization product from vinyl butyl ether and maleic anhydride, 70 g of red iron oxide, 10 g glycerin. 2 g hoof oil, 5 g of dye no.293 (Schultz, dye tables, VII., 1931).

The mixture becomes a uniform paste with the addition of M7asser grind and dilute to 1500 g with water before use. This body color is applied to chrome calf leather with a brush or a spray gun, which is s-prepared in a known manner for dressing.

If necessary, several orders are made with the same mixture with horizontal drying until the material is sufficiently covered. To shine To obtain, the following finish is then applied: 50 g of a 20 ° loigen Solution of the ammonium salt of the copolymerization product from vinyl butyl ether and alaleic anhydride, IGg of a 6% solution of the s atrium salt of the copolymerization product from styrene and alaleic anhydride. 16 g glycerine, 774 g water.

Drying the finish will help improve waterfastness the following solution was applied with the spray gun: 5 g crystallized chromium chloride, 200 g formaldehyde (30%), 795 g water.

The leather is then well dried, polished and ironed.

The leather finished in this way is very even in color, has a good shine and is suitable for shoe upper leather.

The following types of leather can also be finished with the top paint be: Bopxcalf, RindboDc, Chevreaux, Roßchevreaux, chevrette, Waterproof, Garment and Glove leather such as chamois leather, SIocha, Chair, S = appa, suede and nubuck. Furthermore, all l-egetabilischen leathers, sx-ie sole leather, bare leather, vachette, and all kinds of portfolio leather and gallantry leather from animal and reptile hides, such as Fish, snake, lizard, frog skins US1V. These leathers can be used on both the scar side, regardless of whether the scar is present or removed, as well as on the carrion side sverden. Likewise, finished items can also be made from dyed or undyed leathers such as shoes, handbags and briefcases, Suitcase usu-. covered with the top color and thereby improved in appearance.

2. A cover for artificial leather of the type composed as follows: 100 g of a 25% solution of the ethylamine salt of the copolymerization product from vinyl methoxide and maleic anhydride, 10 g dye no.1366 (Schultz, lTarbstofftabellen, VII., I93I), 10g glycerine, 2g nipple oil is added with Grind the water to a uniform paste, then add 25 g of an oily solution Add emulsion of polyacrylic acid ethyl ester in water and dilute with further amounts lVasser to a total of 750 g.

The mixture is applied in the same way as in the example 2.

The following mixture is used as a finish: 75 g of a 25% strength Solution of the ammonium salt of the copolymerization product from vinyl methyl ether and maleic anhydride, 8 g glycerine diluted with water to 1000 g.

In order to improve the water fastness, the following will conclude Hardened solution: 10 g aluminum sulfate, 200 g formaldehyde (30%), 790 g water.

The synthetic leather is polished at the end.

3. On vulcanized fiber, a cover layer is usually made of casein, Pigments and Turkish red oil are applied. For creating shine and enhancement The following finish is finally sprayed on to ensure that it is rubbing fast: 200 g of an alcohol Solution of the ammonium salt of the mixed polymerisation product from vinyl acetate and maleic anhydride, 8 g polyglycerine, 792 g water.

After the finish has been applied, formaldehyde solution is added with 10% strength hardened, dried and the material ironed or calendered.

. A color coating for cardboard is composed as follows: One melts 3 g rosin and stir the melt in 50 g of a 10% solution of the ammonium salt of the copolymerization product of vinyl acetate with crotonic acid. To this Mixture is added 50 g of methyl cellulose solution (5%), 10 g of dye No. 86 (Schultz, Dye tables, VII.,. Ig3I), 10 g glycerine and grind the whole thing with added of water to a uniform paste. The mixture is made by adding water set to 500 g and with a dyeing machine or by spraying on the material applied. The mixture is repeated several times to achieve strong coverage applied with drying in between.

As a gloss finish, one or more orders of the following composition are given: 5 g of rosin are melted and in 100 g of a 10% solution of the ammonium salt of the copolymerization product of vinyl acetate and crotonic acid, then stirred in one dilutes with water to 500 g.

The finish is according to Example 2 with chromium chloride and formaldehyde made water-proof. After drying, the cardboard is calendered.

5. A finish for leather is set as follows: 25 g of one 10% solution of the ammonium salt of the copolymer of vinyl acetate and acrylic acid are diluted to 1 l with water. The finish is done with a soft brush or applied to chrome goatskin by spray gun, which was previously known in Wise dyed, greased, dried and put.

The finished material is bumped after drying; man receives a high-gloss, flawless finishing effect.

Claims (1)

PATENT CLAIM: Process for the production of glossy coatings on leather, synthetic leather, vulcanized fiber or cardboard, characterized in that one on the documents solutions of salts of the copolymers of unsaturated carboxylic acids and vinyl compounds and then shine in the usual way by bumping To differentiate the subject matter of the invention from the state of the art are in The following publications have been considered for the granting procedure: German U.S. Patent No. 538,074; U.S. Patent No. I 976 679.