The composition for the fatliquoring of leather and fur

 

(57) Abstract:

The inventive composition for the fatliquoring of leather and fur contains, by weight. pasta "VNIIG" 20-60; emulsifier 8-20; caustic soda 0,1-0,5; chlorinated paraffin wax else. table 1.

The invention relates to fur and leather industry, in particular compositions for the fatliquoring of leather and fur.

Known use in domestic fur industry fattening pasta Deegan M [1]

However, this pasta does not have the stability of an emulsion for solutions of electrolytes and therefore cannot be used in modern methods of processing furs, combining operations tanning, pickling and fatliquoring.

Also known for fatliquoring fur blend of spun oil and emulsifier OP-7 [2]

This composition has some tolerance to tanning solutions, but due to inability of the hydrocarbons to form strong links with the collagen fibers of the skin, it is easy to migrate from the skin after the fatliquoring processes of washing and drying, resulting in not achieved the required preservenet and fullness to the leather, which leads to deterioration in the quality of fur and leather.

Known composition for CLASS="ptx2">

However, it has some significant drawbacks:

1) low stability of the emulsion;

2) paste unsuitable for fur: on the conclusion of the all-Union industrial fur fur Association, processed fat emulsion with 30% paste content, change color, deteriorated the quality of the cloth; these histological analysis pelts of Fox, conducted immediately after manufacture and after 6 months of tanning showed insufficient preservenet throughout the thickness of the slice;

3) storage of furs, processed pasta, unsafe fire.

Known composition for the fatliquoring of leather, including pasta VNIIG", emulsifier and solvent [4] is taken as a prototype. As an emulsifier, a mixture of synthetic grease and polics, and the solvent perchlor-250. However, this composition has drawbacks:

1) not suitable for processing fur due to the presence in the paste "VNIIG" significant amount of peroxide compounds, which process fur oxidized with the release of a large amount of heat that is unsafe;

2) high consumption of emulsifier, which is not achieved high emulsion capacity feeding component, and hence high stability of the emulsion;

The objective of the invention to provide a composition for the fatliquoring of leather and fur with high emulsion stability and washing ability, which allows you to produce the fat in the processing of fur, improve elasticity of skin, and to save scarce components.

Proposed structure for the fatliquoring of leather and fur, including pasta VNIIG", emulsifier and chlorinated paraffin wax with a combined chlorine content 24-29 wt. as a solvent. As an emulsifier, a mixture of anionic and nonionic surfactants in a ratio of 0.6-0.8:1, respectively. The composition additionally contains caustic soda as a stabilizing and misusage agent. Serves the following ratio of components, wt. Pasta "VNIIG" 20-60 Emulsifier 8-20 Caustic soda 0.1-0.5 chlorinated paraffin wax Else

The introduction of the caustic soda as a stabilizer is because pasta "VNIIG" is a product of oxidative sulfotyrosine, and in the process sulfotyrosine formed peroxide content in the final product is up to 8-9 wt.

Process fur is quite long and collagen to generate the evolution of a large quantity of heat, that leads to inflammation of the skin. The introduction of the caustic soda cuts peroxide circuit and stabilizes the product.

As misusage agent the introduction of the caustic soda is justified by the fact that the composition of the paste "VNIIG includes from 5 to 7 wt. free acids. If the content of free acids greater than 5 wt. the fat settles on the hair, fur dull, stick together. Caustic soda binds free acid and reduces their number to 2 wt.

As an emulsifier, a mixture of anionic and nonionic surfactants, as in the pasta "VNIIG" are present as sulfonic ethers, and sulfonic acids, and the said mixture can improve the emulsifying ability of the composition. In addition, the introduction of caustic soda helps improve detergency proposed mixture of surfactants, reducing the consumption of emulsifier in the composition. The ratio of anionic and nonionic surfactants is taken of 0.6-0.8:1, respectively. In addition, a mixture of emulsifiers adsorbed Koshevoy cloth weakens the interaction of protein molecules (i.e., the observed equilibrium adsorption of surfactants), which also promotes deep penetration of fattening component in thickness of skin and fur, there are no puckering of the skin. When espressa account of the large number of functional groups of the components of the proposed structure interact with the collagen of the skin and firmly associated with Koshevoy cloth.

The composition for fatliquoring prepared as follows. To the required amount of pasta "VNIIG" poured a chlorinated paraffin wax and add a mixture of emulsifiers. Then enter the stabilizer. The mixture is stirred for 0.5 h at 40-45aboutTo obtain a homogeneous state. The composition is a dispersion emulsion 0.8 to 1 MK, the content of total fat 85-90 wt. the presence of peroxide compounds 2-3 wt. emulsion stability during storage of 12 months, high stability 1% emulsion to the electrolytes.

Quality of leather and fur (the experiments were carried out on the skins Fox and sheepskin) processed the proposed composition, the composition of the prototype and benchmark, which use imported drug Grassy shown in the table.

As can be seen from the table, as a fur and leather processed by the proposed structure, significantly better than the quality of the skin and fur of the prototype.

When the reduction of the number of input stabilizer (less than 0.1 wt.) reduced emulsion stability of the composition and stability of the 1% emulsion electrolyte (sample 6), the increase in its quantity (more than 0.5 wt.) adversely affects the skin and fur (sample 7). Adversely affects the quality of fur and leather red eye reduction is their number pastes "VNIIG" economically impractical (sample 5). Use one emulsifier (anionic or nonionic surfactants) leads to 1% emulsion is not formed at all (samples 10, 11). Failing to do this the ratio of components in the composition leads to deterioration of emulsion stability and structure to lower quality fur and leather (samples 6, 9).

Emulsion stability of the proposed structure in comparison with the prototype increases by 3 months, improves the stability of the 1% emulsion to the electrolytes, the tensile strength tensile leather increased by 25-36% total elongation 2.5-2.7 times the abrasion resistance of hair to 31-35% color products anionic dyes uniform, viviremos fat from the working solution to 95%

Thus, the proposed structure for fatliquoring compared with the prototype has the following advantages:

1) the composition is not a mechanical mixture of the components, as a prototype, and the mixture in chemical equilibrium with interacting components;

2) significantly reduced the amount of impurities in the form of peroxide compounds in the final product;

3) all components included in the composition, are available raw materials;

4) improved stability with opernogo color products anionic dyes;

6) achieved a high degree of pozirovanii products, without spots.

The COMPOSITION FOR the FATLIQUORING of LEATHER AND FUR, including pasta VNIIG", emulsifier and chlorinated paraffin wax with a combined chlorine content 24-29 wt. as a solvent, characterized in that it additionally contains caustic soda, and as an emulsifier mixture of anionic and nonionic surfactants in a ratio of 0,6 0,8 1 in the following ratio, wt.

Pasta "VNIIG" 20-60

Emulsifier 8-20

Caustic soda is 0.1-0.5

The Rest Of Chlorinated Paraffin Wax

 

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FIELD: chemical technology.

SUBSTANCE: invention relates to greasing and emulsifying substances used in fur, leather and other branches of industry. Invention describes a method for deep sulfonation of oxidized vegetable oils, fats and their mixtures, and oxidized mixtures with the nominal viscosity value in the range 33-75 by viscosimeter VZ-4 at 20°C in their treatment with sodium sulfite. The process is carried out in system consisting of oxidized component or mixture of oxidized components, sodium sulfite, water and soap additives, carboxylic acid, phenol and copper (II) salt as a catalyst in bead mill of vertical type at temperature of environment up to practically complete ceasing or quantitative consumption of sodium sulfite and charge of the latter is calculated by the following formula: mNA2SO3 = 0.006 x mOX x (I.N.)OX wherein mOX and (I.N.)OX mean mass and iodine number of oxidized component or mixture of oxidized components, respectively. The mass ratio of oxidized component and water varies in the range from 1:4 to 1:2.5. Dosing additives with respect to oxidized component are following: soap, 2%; carboxylic acid, 4%; phenol, 2.5%. Oxidized flax, sunflower, soybean and cotton oils, oxidized fish oil and mixtures of vegetable oils with fish oil or pig fat are subjected for sulfonation reaction with air in regimen of intensive bubble bubbling at 105 ± 5°. Soaps in indicated system are represented by sodium stearate and sodium oleate and by reaction mixtures of practically quantitative alkaline hydrolysis of fats and vegetable oils also. Benzoic, oxalic, malonic and citric acids are used as acid, and sulfate, acetate and other water-soluble salts of copper (II) are sued as a catalyst dosed in the amount (2-7.5) x 10-4 mole/kg of the parent charge. The sulfonation reaction degree is 33-40%.

EFFECT: improved preparing method.

5 cl, 1 tbl, 16 ex

FIELD: tanning industry.

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EFFECT: facilitated procedure; increased amount of product.

1 tbl, 15 ex

FIELD: leather industry.

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EFFECT: simplified process and increased product discharge degree.

1 tbl, 19 ex

FIELD: process engineering.

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EFFECT: improved leather structure due to increased non-blocking property of molecules.

1 ex

FIELD: chemistry.

SUBSTANCE: method involves chrome tanning and post-tanning a semi-finished product through chrome tanning in the presence of a product of reaction of 3-aminopropyltriethoxysilane and glycidylmethacrylate in molar ratio of 1:2 and consumption of the chrome tanning agent and reaction product of 3-4% and 2-3% of the weight of the semi-finished product respectively. Neutralisation and hydrophobisation with a polymer tanning agent are then carried out for 30-40 minutes with consumption of the tanning agent equal to 8-10% of the weight of the semi-finished product. After that dyeing is carried out in the presence of a synthetic tanning agent in amount of 3-4% of the weight of the semi-finished product. Post-tanning is carried out with a plant-material tanning agent and the semi-finished product is also treated for 20-30 minutes with a product of reacting hexamethylenediamine with phosphoric acid and urea in the presence of glycerin in molar ratio of 1:3:3:0.5 respectively, in amount of 3-4% of the weight of the semi-finished product and for 20-30 minutes with organic acid in amount of 0.5-1.0% of the weight of the semi-finished product. Further, the semi-finished product undergoes greasing and re-treated for 40-50 minutes with a product of reacting hexamethylenediamine with phosphoric acid and urea in the presence of glycerin in molar ratio of 1:3:3:0.5 and consumption of 7-8% of the weight of the semi-finished product, volume ratio of 0.8-1.0 and temperature of 20-22C. Hydrophobisation with a polymer tanning agent, dyeing in the presence of a synthetic tanning agent, post-tanning with a plant-material tanning agent, further treatment with a product of reacting hexamethylenediamine with phoshoric acid and urea in the presence of glycerin in the said molar ratio and with organic acid is carried out in one bath. Separation and drying are carried out after all operations.

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2 cl, 3 tbl, 5 ex

FIELD: chemistry.

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2 tbl, 5 ex

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EFFECT: proposed method of drumming leather provides effective antifungal inhibition at high quality of finished skin.

1 cl, 2 tbl, 3 ex

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