The composition for the fatliquoring of leather with a coloring effect

 

(57) Abstract:

The invention relates to the leather industry and can be used in the formulation of chrome leather of various assortment. The composition contains greasing material based on natural fats and synthetic substitutes and fine color pigment with a particle size less than 25 microns. The technical result from the use of this composition is to improve the quality of the skin and reduction of pollution of wastewater. table 1.

The invention relates to the leather industry and can be used in the formulation of chrome leather for various purposes.

Known composition for the fatliquoring of leather with a coloring effect, containing oiling material number 20-92 wt. % (based on 100% of the mixture) and a solution of aniline in an amount of 1-20 wt. % (based on 100% of the mixture). The composition brushes applied to the surface of the skin. (SU authorship, N 14923, CL C 14 C 9/00, 1930. )

The disadvantage of this structure is that it is designed to pogonoski the skin surface and are not suitable for the process of emulsion fatliquoring, which is held in the drum when J. K. 1.0 to 1.2 and allows you to achieve end-to-end ravnomernost is a composition for the fatliquoring of leather with a coloring effect, includes feeding the material on the basis of an oxidized mixture of natural fats, synthetic fat substitutes and oil, the ink composition in an amount of 3-35% by weight of oxidate containing, by weight. % black pigment 35, organic acid 30 and kerosene 25. (RU, patent N 2099430, C1, class C 14 C 9/02, 20.12.97. ).

The disadvantage of this structure is that used in the ink composition of low-dispersed black pigment penetrates poorly into the facial skin layer and mainly deposited on its surface, which hinders the process of fatliquoring and leads to deterioration of quality leather. In addition, included in the organic acid, kerosene and sodium sulfite pollute waste water tanneries.

The technical result of the invention is to improve the quality of the skin and reduction of pollution of wastewater.

This result is achieved by the fact that the composition for the fatliquoring of leather with a coloring effect, comprising feeding the material based on natural fats and synthetic substitutes and pigment as the pigment contains finely ground colored pigment with a particle size less than 25 microns in the following ratio, wt. %:

Greasing material - 80-95

The pigment in the second pigment allows the fats to penetrate in the front and botermans layers of the skin and firmly contact with the collagen of the dermis, that allows them to spend the fatliquoring process, to eliminate the opportunity easily soiled skin and increase the intensity of their staining.

The introduction of the feeding material in quantities less than 80 wt. % does not allow the fat evenly distributed across the layers of the skin, its introduction more than 95 wt. % leads to when tagged bulk. The introduction of finely ground pigment in an amount less than 5 wt. % does not allow to obtain durable and intensely colored skin, and its introduction more than 20 wt. % impractical because of the further increase in the intensity of staining does not occur. The grinding of the pigment to a particle size greater than 25 μm does not allow him sufficient to penetrate the superficial layers of the skin and leads to marking and reduce the strength of color.

As natural fats and synthetic substitutes use of well-known domestic and imported feeding materials have found application in the leather industry for the production of various types of leathers. So, for example, as a natural fat using sulfated and sulfonated fish oil, ethoxylated lard, sulphonated technical lard, etc. as synthetic substitutes iesca fatty acids of different factions and so D. , and is widely used ready oiling composition based on natural and synthetic fats, for example Universal-H, Wagon-C, Extras, etc.

As pigments used various organic and inorganic pigments with high light fastness and chemical resistance. The choice of pigment depends on the requirements of skin color. For example, for skin black used technical grade carbon C (GOST 7585-86), white - titanium dioxide brand P-02 (GOST 9808084), blue - pigment blue phtalocyanines (GOST 6220-76), etc.

Technology of preparation of the composition is as follows.

Oiling composition at the stated ratio is mixed with the original powdered pigment, after which produce dispersing the mixture using a bead mill until the pigment particle size less than 25 microns.

Technology of application of the composition is as follows.

Semi-finished leather, obtained by known methods from the skins of cattle or swine raw materials, it is greased in the drum when J. K. 1.2 to 1.5 and a temperature of 60-65oC for 50-60 minutes proposed structure by the flow of 7-9% by weight of shaved leather (considering 100% fat). Dalnas is, download 80 wt. % of fattening material and 20 wt. % technical grade carbon C. After thorough mixing, the resulting mixture was placed in a ball mill and dispersed it to the pigment particle size not more than 25 μm.

As the feeding material, a mixture of, by weight. %: sulphonated fish oil 50, chlorinated paraffin 20, spun butter 20 and oxyir 10.

The semi-finished product obtained by the known methods of production of chrome-tanned leather for Shoe uppers from the skins of cattle, it is greased received micronized composition by J. K. 1.2 and a temperature of 60oC for 60 min. Flow rate of 8% by weight of shaved leather, considering the 100% fat. Further processes and operations carried out by the standard method of production of chrome-tanned leather for Shoe uppers natural outer surface.

Example 2. In a container equipped with a stirrer, a load of 87.5 wt. % of fattening material and 12.5 wt. % titanium dioxide brand R-02. After thorough mixing, the resulting mixture was placed in a ball mill and dispersed it to the pigment particle size not more than 25 μm.

As the feeding of the material using the composition of THE Extra N 113-04-03-73-87.

The semi-finished product obtained by WPI and J. K. 1.2 and a temperature of 60ofor 50 minutes the Flow rate of 7% by weight of shaved leather, considering the 100% fat. Further processes and operations carried out by standard methods.

Example 3. In a container equipped with a mixer, load 95 wt. % of fattening material and 5% pigment blue phthalocyaninato. After thorough mixing, the resulting mixture was placed in a ball mill and dispersed it to the pigment particle size not more than 25 μm.

As the feeding of the material using the composition Wagon-H TU N 113-04-75-7-88.

The semi-finished product obtained by the known method of producing skin leather from the skins of cattle, it is greased received micronized composition by J. K. 1.5 and a temperature of 65oC for 60 min, the Flow rate of 9% by weight of shaved leather, counting to 100 cent fat.

Example 4. In a container equipped with a mixer, load 78 wt. % of fattening material and 22 wt. % technical grade carbon C. After thorough mixing, the resulting mixture was placed in a ball mill and grind it until the pigment particle size 28-30 ám.

As the feeding of the material using the composition of example 1.

The semi-finished product obtained by the standard method of production of the ing stirrer, download 97 wt. % of fattening material and 3 wt. % titanium dioxide brand R-02. After thorough mixing, the resulting mixture was placed in a ball mill and grind it until the pigment particle size 28-30 ám.

As the feeding of the material using the composition according to example 2.

The semi-finished product obtained by the standard method of production of the skin lining of the skins of cattle, treated as in example 2.

Quality indicators received skin compared to skin on the prototype presented in the table.

Using the proposed structure allows to obtain various types of leather with high performance properties.

The composition for the fatliquoring of leather with a coloring effect, comprising feeding the material based on natural fats and synthetic substitutes and pigment, characterized in that as a pigment it contains finely ground colored pigment with a particle size less than 25 microns in the following ratio, wt. %:

Greasing material - 80-95

Pigment - 5-20

 

Same patents:

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FIELD: tannery or furry production.

SUBSTANCE: the invention is pertaining to the field of tannery or furry production and may be used for a piece by piece treatment of a tanning, furry semi-finished product with emulsions of "water in oil" type. The device for impregnation of sheets contains a mounted on the frame bath with a working compound, in which a corrugated roller is dipped, and also a feeding and auxiliary conveyers and a smoothing roller, a supporting means with a resilient counterbody, an actuator, a tool for removal of a finished semi-product, a device for creation of a hydrodynamic wedge and a pinch roller for engagement of the ribbed roller with the feeding conveyor. The problem of the presented invention is - development of the device simple in its servicing with a high reliability allowing to realize the process of impregnation more efficiently with a possibility of its installation in an automatic production line.

EFFECT: the invention presents a device simple in its servicing, having a high reliability, more efficient realization of the process of impregnation, a possibility of its usage in an automatic production line.

2 dwg

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.

SUBSTANCE: process is conducted in vertical mill to which soot, induline, kerosene and diesel fuel are introduced. Then components are mixed and slow heating the apparatus and its content is started after which mixing is switched off and slow heating of mill content is continued. Upon expiration of said time, acids or their compositions, white spirit and fatty additive are introduced and chemical mass-exchange process is performed at spontaneously fixed temperature due to thermal effects of this process and natural cooling at the beginning and at the end, as well as due to forced cooling at intermediate stage characterized by high rates of temperature at maximum of 140-150°C. At the moment when forced cooling is discontinued, 0.5-1.5 h before discontinuation of mixing and beginning of withdrawal at temperature of 80-115°C, 43-52-% solution of aluminum salts and C10-C20 of carboxylic acids is introduced into product being prepared.

EFFECT: facilitated procedure; increased amount of product.

1 tbl, 15 ex

FIELD: leather industry.

SUBSTANCE: preparation of composition is conducted on vertical-type bead mill. Induline, kerosene, and diesel fuel are consecutively charged into mill before stirring mechanism is energized, after which apparatus and contents thereof are slowly heated. Stirring is then stopped for 1 h while slow heating of mill contents is continued. When specified time expires, carboxylic acid or acid mixture, white spirit, fat additive, and aluminum oxide or hydroxide are added. Mechanic stirring is then switched on and contents of the bead mill are ground and the process is carried out at spontaneously fixed temperature caused by heat effects of the processes and natural cooling. When temperature is lowered to 85-120°C, desired product is discharged.

EFFECT: simplified process and increased product discharge degree.

1 tbl, 19 ex

FIELD: process engineering.

SUBSTANCE: oil, fat or polymer is applied on leather in amount of less that 20%, preferably, less than 15%, particularly preferably less than 10%, per leather weight. Then leather is treated by compressed air. Carbon dioxide is used as compressed air, treatment if carried out at pressure below 70 bar and temperature below 25°C. Leather is processed by compressed air unless leather weight is at least 1% smaller than its weight prior to applying oil, fat or polymer.

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 20-22°C. 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.

EFFECT: higher water-, fungus- and heat-resistance of leather under high moisture and temperature conditions, and wide range of special types of leather.

2 cl, 3 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: method involves tanning a semi-finished product with a chrome tanning agent, neutralisation, washing, dyeing and tanning with organic tanning agents twice. The first tanning is carried out with a polymeric tanning agent, while the second is carried out with a mixture of synthetic and vegetable tanning agents. Hydrophobicising greasing, treatment with an organic acid and re-tanning with a chrome tanning agent are then carried out. Additional washing is carried out before neutralisation. Dyeing is carried out after the second tanning. Neutralisation, tanning twice and dyeing are carried out at water-to-goods ratio of 0.5-0.7. Hydrophobicising greasing is carried out in the presence of a 20% solution of the product of reacting amino alcohol with fatty acids of vegetable oils of the C12-C22 fraction and boric acid in molar ratio of 2:1:1 in mineral oil in amount of 0.5-1.5% of the weight of the semi-finished product.

EFFECT: good hygienic properties of hydrophobic leather and prolonged fungus resistance of the leather in high humidity and temperature conditions.

2 tbl, 5 ex

FIELD: leather industry.

SUBSTANCE: invention relates to leather industry in production of leather of various assortment, in particular, to methods of drumming leather in presence of fungicide, and can be used in skin processing for improving operational properties. Method of drumming leather is implemented with drumming composition in presence of an effective antifungal inhibitor, the latter is represented by 6.0 % solution of N1-chloro-methylbenzimidazole fungicide. Fungicide is dissolved in ethyl alcohol taken in the amount of 0.2-0.5 % of squeezed leather weight at the drumming composition consumption of 20-22 % of the squeezed leather weight in terms of 100 % fat. Drumming time is 1.5-2.5 hours at the temperature of 70-80 °C.

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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