SU962314A1 - Skin tanning composition - Google Patents

Description

The invention relates to light industry and can be used in leather processing for tanning leather. The composition for tanning leather is known, in which the hide is treated with salt and water, followed by emulsion of spun oil for 10-15 minutes before duplication, after which the skin is treated with dichroic acid and, upon reaching full color, chromic extract is added to the treatment solution at the rate of 2% (in terms of chromium oxide) 1 However, the use of this composition is associated with high water consumption, while the tanning process itself is characterized by a considerable duration. Closest to the composition proposed for technical sugi and the achieved effect for tanning leather, including chromium tanning salts, surfactant, hydrophobic organic compound and water 2. However, using known skin composition, there is a lack of elasticity, in addition, there is a decrease in skin clearance by area. The purpose of the invention is to increase PLASTICITY and the area of finished leathers. This goal is achieved by the fact that the composition for tanning leather, including tanning salts of chromium, surfactant, hydrophobic organic compound and water, contains these components in the following amounts, wt.%: Tanning, salts of chromium1-6 Surfactant0 , 25-0.5 Hydrophobic organic compound 30-85 WaterOther The said composition contains supercell or oleic acid as a surfactant, and spun oil or white spirit or three as a hydrophobic organic compound. chloroethylene Leather tanning with the proposed composition is carried out as follows. The semi-finished product prepared for tanning is squeezed to a moisture content of 50-55% and loaded into the drum, then, through a hollow axis, a solution is obtained in BA3 9 slaves, which includes the following components, wt%: Doubling chromium salts Innovative active 0.25-0 , 5 substance. Hydrophobic organic 30-85 compound. Remaining Consumption of 30-50% by weight of the semifinished product. Handle for 1-2 hours with reversing the drum after 30 minutes. Processing temperatures 25-30 ° C; Upon reaching the overflow, the semi-finished products are unloaded for 6 hours. Example 1. The semi-finished product prepared for tanning is pressed to a moisture content of 50% and loaded into a drum, the solution is fed through a hollow axis, and at a consumption of components, wt.%: Chrome tanning agent (in in terms of CrHO3) 1 Pre-celled-0.25 Spun oil85 WaterOstal Consumption of 50% by weight of semi-finished product Processing temperature 30 ° C, duration 2 h. Example 2. Pellets are squeezed to a moisture content of 52% and treated with a composition that includes the components in the following mass% ratio: Chrome tanning agent (in terms of CgO3) White spirit Oleic acid Remaining Water Consumption composition 40% by weight of the semi-finished product, temperature 25 ° C, processing time 1.5 hours. Example 3. A semi-finished product prepared for tanning is squeezed to a moisture content of 55% n loaded into the drum, then, when rotated, the composition containing the following components, wt.%, Is fed to the drum: Chrome tanning agent (in terms of CraOj) 6 Trichlorethylene30 Prevoccell5 WaterOs cial "Flow composition 50% by weight of the semifinished product temperature 35 ° C, duration 1 hr treatment. Reference treatment option for each lead experienced embodiment in accordance with the prior art. The amount of the tanning solution is 50% of the weight of the semi-finished product, the consumption of trichlorostille corresponds to a liquid coefficient equal to 10. The data of physical and mechanical tests of leather samples treated with the proposed and known compositions are summarized in the table.

94

10094.5 84

100,103.95

96

100105.25

99111.65

96

10096.8

108

96,294.1 108

-5,5 57,842,27,45

+3.95 50.58 49.4211.57

+5.25 81.97 18.034.76

12.77 73.97 25.284.9

-3.2 81.41 18,597.35

Claims (2)

-2.18 59.56 38.098.9 5 From the data of the table it follows that during duplication with the proposed composition, the quality of leather is improved by improving the indicators characterizing the elasticity of leather and shrinking them over the area during processing. The economic efficiency of using the proposed composition is 12.9 rubles. on 100 m of ready skin. Claim 1. A composition for tanning leather, comprising tanning salts of chromium, a surfactant, a hydrophobic organic compound and water, characterized by hem, which, in order to increase elasticity and surface area, it contains these components in the following amounts, wt.%: Chromium dubbing salts1-6 Surfactant 0.25-0.5 Hydrophobic organic compound 30 -85 Water Else 2. Composition according to claim 1, characterized in that it contains precella or oleic acid as a surfactant . 3. The composition according to claim 1, characterized in that it contains spun oil ilts white spirit, or trichlorethylene as a hydrophobic organic compound. Sources of information taken into account during the examination 1. Gaidarov L. P. Skin technologists. 1974, p. 35 2. For the application of the Federal Republic of Germany No. 2532393, cl. C 14 C 3/00, 1977 (prototype).