Wax emulsion for finishing natural leather

 

(57) Abstract:

The inventive wax emulsion for finishing leather contains, by weight. the product of esterification of fatty acids and monohydroxy alcohols 45 50; polyethylsiloxane 5,5 6,5; ethyl cellosolve or formalistically 0.1 to 0.2; water the rest. table 2.

The invention relates to the leather industry and can be used for finishing leather.

The wax emulsion used in the composition of the pigmented primers and top coat paints for finishing 2-4% by weight coating paint.

In known compositions for finishing, mainly using wax emulsions made with natural waxes, which are scarce products [1]

We are searching for a synthetic waxes that are less scarce materials than natural wax.

Famous wax emulsion for finishing leather-based synthetic wax, which is the closest in technical essence to the proposed wax emulsion.

Famous wax emulsion comprises as a wax product of esterification of fatty acids and monoethanolamide synthetic fatty acids, emulsifier OS-20 and ethoxylated Z and mono

ethanolamides this

ical fatty acids 10-20

Emulsifier OS-20 2,5-3,5

Ethoxylated

the ALKYLPHENOLS of 2.5-3.5

Water the Rest

The use of wax emulsions for finishing leather in the coating compositions of colors allows you to replace the natural wax on non-deficient raw materials with good quality finished leather upper and lining for shoes from the skins of cattle.

The task of the invention is the expansion of raw materials for the materials used in the wax emulsions as synthetic waxes, good quality finished leather.

The problem is solved in that the wax emulsion for finishing natural leather, including synthetic wax, additives and water according to the invention, as a synthetic wax contains the product of esterification of fatty acids and monohydroxy alcohols, and as additives polyethylsiloxane, ethyl cellosolve or formylglycine in the following ratio, wt.

The product of esterification

fatty acids and one

atomic alcohols 45-50

Polyethylsiloxane 5,5-6,5

The ethyl cellosolve or

formylglycine 0,1-0,2

Water the Rest

In the proposed status is B>, where R is alkyl radical C where R is an alkyl radical WITH17-C20< / BR>
WITH21-C25< / BR>
R1CnH2n+1< / BR>
Wax emulsion for finishing, where as synthetic wax use the product of esterification of fatty acids and monohydroxy alcohols containing polysiloxane, ethyl cellosolve or formylglycine in information sources is unknown.

P R I m m e R. Wax emulsion for finishing leather prepared as follows: 47 g of synthetic wax product of esterification of fatty acids and monohydroxy alcohols mix from 46.8 g of water at room temperature for 30 min, then gradually add 6 g of polyethylsiloxane and 0.2 g of ethyl cellosolve or formylglycine under stirring to obtain a homogeneous composition.

Wax emulsion for finishing a wide range of uses 2-4% by weight coating paint.

On skin, prepared by the factory method, applied by spray coating a paint containing a pigment concentrate, a foaming agent, a solution of casein and wax emulsion based on synthetic product of esterification of fatty acids and monohydroxy alcohols containing polyethylsiloxane, ethyl cellosolve, or formany paint exercise for 2-3 passes on the unit two times of application. The flow rate of 50-80 g/m2when passing through each cell.

Covered and dried skin fix and pressed according to the typical technique of production of leather.

In table.1 shows specific examples of the proposed composition of the wax emulsion for finishing and its properties.

The compounds 1,2 are the best formulations of the wax emulsion.

The use of synthetic wax product of esterification of fatty acids and monohydroxy alcohols of less than 45% and more than 50% of polyethylsiloxane less than 5.5% and 6.5% of ethyl cellosolve or formylglycine less than 0.1% and about 0.2% leads to the decrease of resistance 5% emulsion.

The properties of the coating film on natural leather, separated using the proposed and known wax emulsions, are presented in table.2.

Skin separated using the proposed composition of the wax emulsions have the same rates of resistance of the coating to wet the friction resistance of the coating to repeated bending, adhesion in dry and wet conditions, cold resistance and heat resistance, and skin, separated with the use of known composition.

The use of the proposed wax emulsions for finishing leather stood in the good quality of finished leather.

In addition, leather trimmed using the proposed wax emulsion, soft, elastic, with a matte effect.

WAX EMULSION FOR FINISHING NATURAL LEATHER, including synthetic wax, additives and water, characterized in that as a synthetic wax it contains the product of esterification of fatty acids and monohydroxy alcohols, and as additives polyethylsiloxane, ethyl cellosolve or formalistically with the following composition, wt.

The product of esterification of fatty acids and monohydroxy alcohols 45 50

Polyethylsiloxane 5,5 6,5

The ethyl cellosolve or formalistically 0,1 0,2

Water The Rest

 

Same patents:

The invention relates to chemical treatment of skins, in particular to the manufacture of special types of leather, and can be used in making leather for Shoe uppers from leather obtained from raw cattle

The invention relates to chemical treatment of skins, in particular, to methods for production of special kinds of skin and can be used in making leather for garment

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

The invention relates to chemical treatment of skins, in particular for finishing the surface of the skin, and can be used for covering the dyeing of natural leather for Shoe upper

Method of finishing // 2017825

FIELD: leather industry.

SUBSTANCE: semifinished product is degreased, neutralized, dyed, and lubricated. Dyeing is performed in two washing-interrupted steps with anionic black dye consumed in amount 0.5-0.6% of the weight of semifinished product in each dyeing step. Lubrication is followed by retannage with chrome tanner in amount 0.6-1.0% of the weight of semifinished product (calculated for chromium oxide) and treatment with 0.8-1.0% of spindle oil.

EFFECT: achieved deep black color and high performance characteristics.

1 tbl, 5 ex

FIELD: light industry.

SUBSTANCE: powdered thermoplastic polyurethane with reduced melting point is applied on fur article parts in most wear place, said polyurethane being prepared from 4,4-diphenylmethanediisocyanate, poly(butylene glycol adipate) and 1,4-butanediol serving as chain extension agent. Thus treated part is then pressed at 64-75°C and remained to lie.

EFFECT: improved quality of fur articles due to increased hair-to-skin tissue binding strength, resistance of hair coat against wear, and increased lifetime of clothes.

FIELD: leather industry.

SUBSTANCE: invention relates to finishing of various-destination leathers made from various types of raw skins and consists in consecutively applying layers of soaking ground, covering paint, and fixing agent. After applying each layer, leather is dried for 5 to 50 sec in microwave fields at field intensity 10000-15000 v/m and power 300-3500 W.

EFFECT: expanded technological possibilities and improved quality of coating.

1 tbl, 5 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: light industry; methods of forming of volumetric and curvilinear details for an article.

SUBSTANCE: the invention is pertaining to the field of light industry, in particular, to the methods of forming of volumetric and curvilinear details for an article is intended for usage in light industry at forming volumetric and curvilinear details for articles made out of a leather, predominantly - clothing. The method consists that on the surface of the flesh side of hide of the flat component of the article made out of leather deposit the polymeric composition containing the following elements (in mass %): - polyvinyl acetate homopolymeric coarse-dispersed plasticized dispersion - 20-35; - dibutyl phthalate (DPHT) - 1.5-15; - water - the rest. The composition may be deposited in the form of a net on in advance prepared templates. After that the component of the article is dried at an indoor temperature. Then the component of the article is formed, for example, by hot pressing at 70-90°C during 1.5-2.0 minutes. And fix the gained form by chilling. The invention ensures improvement of quality of the articles made out of leather due to increased the form stability of components of the article.

EFFECT: the invention ensures improvement of quality of the articles made out of leather due to increased the form stability of components of the article.

4 cl

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: leather industry.

SUBSTANCE: invention relates to wax emulsions used in coating pain composition designed for finishing genuine leathers and provides a wax emulsion component, which represents polyvinylacetate dispersion containing non-plasticized polyvinylacetate in amount at least 45 wt %, content of polyvinylacetate dispersion in wax emulsion ranging from 40 to 80%. Proposed component when used in wax emulsion allows leather coatings to be obtained manifesting good organoleptic properties, high temperature resistance, low tackiness, and agreeable leather to the touch at moderate cost of wax emulsion.

EFFECT: improved consumer's quality and enlarged resource of wax emulsion components.

1 tbl, 6 ex

FIELD: leather industry.

SUBSTANCE: method, which is suitable for finishing chrome leathers, comprises consecutively applying coating layers followed by action with low-temperature plasma at generator lamp anodic current intensity 0.2-0.6 A. Action of low-temperature plasma is effected for 180-240 sec at pressure 13.3-26.6 Pa in discharge chamber and consumption of plasma-forming gas (argon) 0.035-0.04 g/sec. Method is implemented on high-frequency plasma installation.

EFFECT: increased adhesion of coating to dry and wet leather, dye penetration depth, resistance to repetitive bends, and strength at better quality of leather.

FIELD: process engineering.

SUBSTANCE: proposed method comprises eliminating defects representing damages sports (3) in layers (2) formed by recesses in skin (1) with natural grain patter. These defects are eliminated as follows, i.e. water or slightly foamed plastic suspension is forced into aforesaid recesses, the said suspension containing ultimate solid particles. Then skin (1) is dried, surface (4) of the layer of grain pattern (2) is subjected to pressure and thermal treatment with the help of pressure roller at least 100C. Note here that plastic mass is formed in aforesaid recesses that contains hollow tiny balloons (5) made up of solid particles to completely fill the said recesses (dwg. 1).

EFFECT: higher quality.

13 cl, 1 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: all layers of undercoat and finish paint are applied on leather subjected, prior to drum painting, to low-temperature non-equilibrium plasma of high-frequency discharge. Exposure is performed for 241 to 280 seconds in discharge chamber at 26.7 to 30.0 Pa, flow rate of plasma-forming argon making 0.041 to 0.06 g/s at discharge power of 0.7 to 2 kW.

EFFECT: increased depth of paint penetration, improved quality of ready leather.

1 dwg, 1 tbl

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