A method of obtaining a wax emulsion


C07C69/26 - Synthetic waxes

 

(57) Abstract:

Usage: for finishing the surface of the skin. Essence: synthetic fatty acids atrificial alcohols at a temperature of 170 To 190C. until the degree of conversion of the acids 60 - 75%. The resulting etherified treated with emulsified mixture of calcium salts of synthetic fatty acids and calcium hydroxide at a temperature of 80 - 95C for 1.0 to 1.5 hours 1 table.

The invention relates to the production of synthetic wax emulsions and can be used to finish the surface of the skin.

Known to produce the composition for finishing the surface of the Shoe by the esterification of synthetic fatty acids17-C20monoethanolamide synthetic fatty acids10-C16, the resulting product is mixed with oxidized polyethylene wax (1).

The complexity of the process is that the solid wax oxidizes and then prepare the emulsion.

The closest to the invention is a method of obtaining modified synthetic wax comprising the esterification of synthetic fatty acids (FFA) alcohols in the presence of sulfuric acid at elevated temperature, and then adding to the reaction is brilliant heated to 220-230aboutWith (2). The resulting wax is mixed with an emulsifier and get a wax emulsion for leather processing.

The resulting emulsion contains a significant amount of salts of organic and inorganic nature, which is associated with the use of sulfuric acid and glacial acetic acid, which degrades the quality of the emulsion due to the low solubility of the resulting sulfate and calcium acetate and considerably complicate the process of preparation of the emulsion. Therefore, this technology provides for the production of high-quality hard wax.

The purpose of the invention is the provision of a possibility to obtain the product directly in the form of an emulsion and reducing the amount of reagents used while maintaining the quality.

The aim is achieved in that in the method of obtaining by the esterification of synthetic fatty acids (FFA) alcohols at elevated temperature followed by treatment of esterificated solution of calcium hydroxide, the etherification is carried out to the degree of conversion of the acid 60-75%, and as a solution of calcium hydroxide use pre shemaleporno a mixture of calcium salts of synthetic fatty acids and hydroxides.

The method consists in that the MCPFE, at a temperature of 170-190aboutWith up to a degree of conversion of the acid 60-75% for 1.5-2 h, the resulting etherified handle for 60-90 min at 90-95aboutPre shemaleporno a mixture of calcium salts of synthetic fatty acids WITH21-C25and calcium hydroxide. Processing esterificated are shemaleporno mixture, the amount of which is in the final product ratio of ester calcium salt FLC=1:3.

Shemaleporno a mixture of calcium salts of synthetic fatty acids and calcium hydroxide is produced by processing FLC21-C25a solution of calcium hydroxide and an emulsifier (for example, ethoxylated alcohols - OS-20) at a temperature of 60-65aboutC for 60-150 minutes the resulting product contains the calcium salt of FLC, calcium hydroxide (unreacted) and emulsifier.

Etherification with a low degree of conversion of (60-75%) acid esters and the subsequent interaction of esterificated with a mixture of calcium salts of alcohols, calcium hydroxide and emulsifier allows to obtain a stable light emulsion having fluid concentration (15-18%).

P R I m e R 1.

100.0 g of synthetic fatty acid fraction WITH21-C25K. H. 175 mg To irout within 2 h to a residual acid number of 70 mg KOH/g degree of conversion of 60%). This Argonauts of 7.3 g of glycolic water, including 3.9 g of glycol. Get 102,4 g esterificated in which add 1640,6 g saalgirah calcium salts alcohols containing 5.7 g of calcium hydroxide, 158,3 g calcium salts of FLC and 30 g of emulsifier, raising the temperature in the reactor 90aboutC and stirred for 1 h Receive 1753 18% of the emulsion, light, stable for 30 days.

The table shows specific examples of the proposed method.

As can be seen from table light, stable emulsions obtained in examples 1-4, in example 5 overstated the degree of transformation due to the growth of consumption of ethylene glycol and wax emulsion has a brown tint in example 6 were obtained light emulsion, however, the stability of its broken already on the 22 day, etherification operates at a temperature of 160aboutWith low productivity. At high temperatures, the esterification of (example 7) increases the consumption of alcohol to 1.5 July per mole of the acid and the emulsion becomes creamy hue.

The use of the proposed method will allow you to get a quality wax emulsion directly on the leather enterprises, greatly simplifies the process, expanding the raw material base, heaving a WAX EMULSION, including obtaining esterificated by the esterification of synthetic fatty acids with alcohols at elevated temperature and processing esterificated using calcium hydroxide and heating, characterized in that the esterification is carried out at 170-190oWith up to a degree of conversion of the acid 60-75% and the resulting rectified treated with emulsified mixture of calcium salts of synthetic fatty acids and calcium hydroxide at 80-95oC for 1.0 to 1.5 hours

 

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1 dwg, 1 tbl

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