SU65973A1 - Method of making a fixative casein coating paints - Google Patents

Description

In order to impart water resistance to the lining of coating casein paints in the process of finishing the upper chrome leather goods, various fixers are used, which include casein, blood, plasticizers, wax, formalin and other materials.

The proposed method for the manufacture of a casein coating color enhancer using protein film forming substances, wax, plasticizers and tanning agents is that the solution of the re-precipitated casein and blood serum is mixed with the triethanolamine stearate emulsion montan-wak (The obtained mixture is injected plasticizer and subduing agent.

For this, the dry serum is dissolved in water, the insoluble part is filtered off and technical formalin (40%) is added to the condensed or liquid serum in an amount of 0.10-0.25% by volume of the solution.

Casein is dissolved in an aqueous solution of borax (15% by weight of casein), the concentration of the solution is adjusted to 20-25% and phenol is added in an amount of 5% by weight of casein.

After diluting the casein solution to 3–5%, it is filtered under vacuum through paper pulp or other material in order to eliminate turbidity, after which casein is precipitated by adding sulfuric or another acid and washed with water. The washed casein is redissolved with borax, the solution concentration is adjusted to 20-25% and phenol is added in an amount of 5% by weight of casein.

Montana wax is emulsified with triethanol amine stearate in water. The irreversibility of this emulsion, together with the insolubility of the other components, ensure the water resistance of the film after application to the skin.

As emollients, a combination of alizarin oil and glycerin or ethylene glycol is used, taken in a certain ratio to the foaming agents in order to ensure sufficient film strength and to avoid stiffness.

This mixture of film-forming and lusters with the proper selection of their ratios gives water-resistant emulsions that are not storage-proof during long-term storage and transportation due to the use of preservative substances.

Water resistance of the film is ensured by adding formalin to the fixative solution immediately before use. To this end, an equal volume of a 4% formaldehyde solution is added to the fixative solution diluted to 5% solids.

The application of the fixative is made with a syringe. Dried skins podveri hot what pressogue loscheiiyu vaniyu.

Subject invention

A method of manufacturing a casein coating color enhancer using film-forming protein substances, waxes, emollients and tanning agents, characterized in that the solution of re-precipitated casein and blood serum is mixed with triethanolamine stearate emtan montan-wax and the emollient and subdue are introduced into the resulting mixture.