The composition for the fatliquoring of leather

 

(57) Abstract:

The inventive composition for the fatliquoring of leather contains, by weight. stabilized chlorinated paraffin 30 50; natural feeding material 30 40; alkylpolyglucosides 10 40. table 2.

The invention relates to chemical treatment of skins, in particular to their impregnation oiling composition, and can be used in the formulation of chrome leather of various assortment.

Known composition for the fatliquoring of leather for Shoe upper, comprising in wt. synthetic fat 20, sulphonated fish oil 30, chloropal 30 and Perchlor-250 20 [1]

The disadvantage of this structure is that part of feeding the synthetic fat in the dry heat treatment skin migrates together with an organic solvent to the surface of the skin, reducing water quality by reducing the adhesion of the coating.

Also used as an organic solvent trichloroethylene or perchloroethylene in Chloropal are toxic compounds that degrade the environment.

The prototype of the proposed technical solution is the fatliquoring composition for skin containing wt. sulphonated fish oil 30-34, SS18with a combined chlorine content 24-29% 32-62 [2]

The disadvantage of this structure is that it contains a large amount of neutral fat 66-72% (synthetic fat and stabilized chlorinated paraffin) and form a coarse emulsion, which does not provide deep penetration and uniform distribution of fatty substances in the skin structure. This leads to stiffness and loss of strength of the skin, deteriorating the adhesion properties of the finishing coats.

In addition, in the process of drying synthetic grease able osmolality, resulting in bonding of structural elements of the skin, its irreversible deformation and shrinkage.

Object of the invention is the improvement of the emulsifying ability of fattening stock and improve the quality of the leather.

This task is achieved by the fact that the composition for the fatliquoring of leather, including stabilized chlorinated paraffin and natural feeding material further comprises alkylpolyglycoside (PAGP) in the following ratio, wt.

Stable

chlorinated Paraffin 30-50

Natural fat - Mering material 30-40

Acylpolyamines - localhost is hosphate increases the dispersion and uniformity of fattening stock. It promotes deep penetration and more uniform distribution of fatty substances on the thickness of the dermis, which gives the possibility to improve softness and elasticity in the finished leathers.

In addition jrouse-emulsifying action alkylpolyglycoside has a filling capacity. Adsorbed on the structural elements of the dermis, it gives the skin fullness and helps reduce shrinkage stresses during drying.

As a result of chemical adsorption PALL on the structural elements of the dermis decreases the possibility of migration of fatty substances on the surface of the skin, there is a stabilization effect of fatliquoring, achieved good adhesion of finishes.

The use of PALL less than 10% reduces aggregate stability and homogeneity of the oiling composition below a set limit of 20 min, causing delamination.

The use of PALL more than 40% is not advisable as it reduces the softness of the skin by reducing the share of neutral fats, the formation of a more rigid frame of the particles of the filling material.

Alkylpolyglycoside available in 3 product forms:

dialkyldithiophosphate (Fasteners H-10) reglementata (Exits B-1).

All three compounds currently used as components of synthetic detergents and demulsifiers for oil-water emulsions.

Technology of preparation of the composition is the following:

The proposed composition for the emulsion fatliquoring leather get direct mixing of these components in the proposed sequence at a temperature of 65-70aboutIn a reactor equipped with a water jacket, and thorough stirring for 15-30 minutes the mixture is Then discharged into the container.

Technology of application of the composition is the following:

Skin of the range derived from the relevant standard techniques, it is greased with J. K. 1.0 to 1.2 and a temperature of 60-65aboutC for 45-60 min in the following composition, wt.

Stable

chlorinated paraffin 30-50

Natural fat - Mering material 30-40

Acylpolyamines - localhost 10-40

The flow rate of 6-8% assuming 100% (leathers for the uppers), 10-12% assuming 100% leather for gloves and clothing). Greasing is performed on the spent dye bath for skin black color and clean water for the colored and uncolored skin. The fat emulsion is poured on the go drum through the hollow shaft at one time. Iravu ipovo method.

P R I m e R 1. The leather and chrome for service obtained by standard methods from raw materials byczyna easy, zerouali the following composition, wt.

Chlorinated

paraffin brand Perchlor 250 30

Sulphonated fish oil 30

Dialkylphenol-

the polyethylene glycol - phosphate 40

Further processes and operations carried out by standard methods.

P R I m m e R 2. Leather for Shoe upper, obtained by standard methods from raw materials rawhide average, zerouali as in example 1 with the following composition, wt.

Chlorinated paraffin (CP-250 40

Sulphonated fish oil 35

Dialkanolamine - glycophosphate 25

P R I m e R 3. Leather for gloves, obtained by standard methods from raw materials of the steer, zerouali as in example 1 with the following composition, wt.

Chlorinated

paraffin stamps CP-418 50

Oksietilirovannye-

Noah swine technical Salo 40

Potassium salt

dialkanolamine - glycophosphate 10

P R I m e R 4. Leather for Shoe upper, obtained by standard methods porcine raw materials, zerouali as in example 1 with the following composition, wt.

Chlorinated

paraffin stamps CP-470 29 Pasta VNIIG 29,5

Dialkylphenol-

litlington - phosphate 41,5

P R I m e R 5. Km composition, wt.

Chlorinated

paraffin brand Perchlor-250 51

Oksietilirovannye-

Noah swine technical fat 40,5

Dialkylamide - loglikelihood 8,5

Physico-chemical characteristics of fattening mixtures are presented in table. 1. The indicators obtained finished leather are shown in table. 2.

Leather produced in accordance with examples 4 and 5, there was some resistance and decrease the adhesion of the coating film.

Using the proposed structure will allow to obtain high quality, soft, flexible chrome leather of various assortment.

The COMPOSITION FOR the FATLIQUORING of LEATHER, including stabilized chlorinated paraffin and natural feeding material, characterized in that it further comprises alkylpolyglycoside in the following ratio, wt.

Stabilized chlorinated paraffin 30 50

Natural feeding material 30 40

Alkylpolyglycoside 10 40

 

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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 25C. 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 20-22C. 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.

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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