Method of dyeing genuine leather with active dyes

FIELD: leather industry.

SUBSTANCE: invention relates to area of dyeboarding operations in leather production, in particular to a method of dyeing genuine leather with active dyes including intermediate product neutralization, active dye dyeing and subsequent fixation with alkaline reagent. According to invention, neutralization is effected in presence of preparation "Deep Dying" in amount 4.5-5.0% of the weight of planned leathers, dyeing is effected with active dye consumed in amount 2.5-5% at medium pH 3.4-3.5 in presence of 0.9-1.2 g/L alizarin oil, and fixation of dye is performed simultaneously with greasing at medium pH 8.5-8.9 with sodium hydrocarbonate consumed in amount 1.3-1.8%, greasing composition in amount 3.8-4.2%, and "Polinap AD" in amount 1.8-2.2 of the weight of planned leathers. Finally leather is rinsed in presence of nonionic surfactant consumed in amount 0.8-1.2 g/L.

EFFECT: optimized dyeing composition and dyeing conditions.

1 tbl, 9 ex

 

The invention relates to the field of dyeing and finishing operations of the leather industry, in particular to methods, drum-dyed cowhide leather active dyes.

There is a method of dyeing the skin with active dyes [1], which is performed in the following way. The semi-finished product (p/f) immersed in a solution of 45%acetic acid at a temperature of 20-25°C. the content of the dye - 1-2% by weight of shaved leather. Dyeing is carried out at liquid ratio (LC)=3; duration of dyeing - 10 minutes. At the end of the dyeing produced draining the waste fluid and follows the processing of p/f 25%aqueous ammonia solution for 5 minutes at 60°C. Then putting it back out the liquid and treated with p/f in a solution containing 5 g/l of soap and 2 g/l soda ash, at 60°C for 20-30 minutes. Then hold greasing and subsequent operations.

The disadvantage of this method is the high consumption of acetic acid and the resulting deterioration in working conditions, and possible unevenness of dyeing leather, p/f because of too low pH of the dyeing solution and the lack of covalent fixation of the active dye.

There is a method of dyeing natural skin active dyes [2], which is carried out in the following way. Directly in front of the beautiful is receiving p/f washed, neutralize and re-washed. Dyeing is carried out at LC=1.5 and a temperature of 60°C for 1-1 .5 hours. The concentration of the dye - 3% by weight of shaved leather. The pH value of the dye bath does not change, it corresponds to that obtained when the final dissolution of various forms of dyes (in this embodiment, the pH for the four different dyes is 6,1 / 5,8 / 6,3 / 8,5).

The disadvantage of this method is the low intensity and uniformity of the resulting coating, low viviremos dye and an insufficient degree of covalent fixation. In addition, at pH 8.5 the structure of the leather p/f may be partially razdolina and will require additional retanning.

The closest in technical essence of the present invention is a method of dyeing natural skin active dyes [3], which is carried out in the following way. Dyeing is carried out at LC=2,5; temperature 60°C for 45-60 minutes; the pH of dye bath corresponds to a value in the range of 4.0 to 5.0. The concentration of dye - 5% by weight of shaved leather. The concentration of neutral electrolyte (NaCl) - 10 g/l Concentration of surface-active substances (surfactants) - 0.5 g/L. At the end of the dyeing waste liquid is drained. The fixing of dye sorbed p/f, is carried out in a 25%aqueous ammonia solution at pH 8.0-8.5 V to use the e for 15 minutes at 60° C. this was followed by a series of washes with warm and cold water.

The disadvantage of this method is the low viviremos and insufficient degree of covalent fixation of the active dye.

The aim of the invention is to increase viviremos active dye and the degree of covalent fixation in p/f, getting an intense and uniform color, resistant to various physico-chemical and mechanical influences.

This objective is achieved in that a method of dyeing natural leather includes a neutralization process in the presence of the drug Deep Dying in the amount of 4.5 to 5.0% by weight of shaved leather, dyeing active dye at a rate of 2.5-5% with a pH of 3.4 and 3.6 in the presence of alizarin oil in the amount of 0.9-1.2 g/l and subsequent fixation of the dye together with the creasing of the skin with pH of 8.5-8,9 sodium hydrogen with a flow rate of 1.3-1.8%, and oiling composition with a flow rate of 3.8-4.2% and "Polina HELL" at a rate of 1,8-2,2% from the mass of sliced skin, additionally rinse in the presence of nonionic surfactants with a flow rate of 0.8-1.2 g/l

Specific examples of the process of dyeing.

Example 1. Neutralization leather p/f carry out aqueous solution of sodium bicarbonate at pH 7.5-8.0 in the presence of the carrier - drug "Deep Dying" at a flow rate of 5.0% by weight of shaved leather. Dyeing of p/f spend dye Akti is pushed deep black CT with a flow rate of 5.0% at pH 3.5 in the presence of alizarin oil in the amount of 1.2 g/L. The fixation of the dye carried out in conjunction with the creasing of the skin with pH of 8.9 sodium hydrogen with a flow rate of 1.3-1.8%, and oiling composition with a flow rate of 4.0% and "Polina HELL" at a rate of 1.8% by weight of shaved leather. After fixation, followed by washing in the presence of nonionic surfactants "Neonol AF 9-10" at a rate of 1.0 g/l and then warm and cold water.

Example 2. Neutralization leather p/f carry out aqueous solution of sodium bicarbonate at pH 7.5-8.0 in the presence of the carrier - drug "Deep Dying" at the rate of 4.8% by weight of shaved leather. Dyeing of p/f hold Active dye red SS at a rate of 2.5% with a pH of 3.6 in the presence of alizarin oil in the amount of 1.1 g/L. Fixation of the dye carried out in conjunction with the creasing of the skin with pH of 8.7 sodium hydrogen with a flow rate of 1.3-1.8%, and oiling composition with a flow rate of 3.8% and Polina HELL" at a rate of 1.9% by weight of shaved leather. After fixation, followed by washing in the presence of nonionic surfactants "Neonol AF 9-10" at a rate of 1.2 g/l and then warm and cold water.

Example 3. Neutralization leather p/f carry out aqueous solution of sodium bicarbonate at pH 7.5-8.0 in the presence of the carrier - drug "Deep Dying" at the rate of 4.5% by weight of shaved leather. Dyeing of p/f hold Active dye Golden yellow 43 with a flow rate of 3.0% at pH 3.4 in the presence of alizarin oil is in the amount of 0.9 g/L. The fixation of the dye carried out in conjunction with the creasing of the skin with pH of 8.5 with sodium bicarbonate with a flow rate of 1.3-1.8%, and oiling composition with a flow rate of 4.2% and Polina HELL" at a rate of 2.2% by weight of shaved leather. After fixation, followed by washing in the presence of nonionic surfactants "Neonol AF 9-10" at a rate of 0.8 g/l and then warm and cold water.

In example 4, is Active dye black ST, in examples 5-8, the dye Active deep-black ST.

In the neutralization process enter the carrier - drug "Deep Dying", representing a complex polyester and allows a greater degree of viviremos active dye from the dye bath.

In the dyeing process can be used bifunctional reactive dye containing two identical or different reactive groups (vinylsulfonate, chlorotriazine) and thus characterized by an increased color stability to physical and chemical influences.

The pH value of the dyeing baths, equal to 3.4 and 3.6, is optimal, since the dye is most fully sorbed p/f and uniformly distributed therein.

Introduction to dyeing bath alizarin oil promotes good viviremos dye, allows to obtain more uniform and rich colouring, in addition, this substance is a wonderful filling and youdim component.

Combining state of fixation of the dye with the fatliquoring process of the skin can reduce the cycle time of dyeing and greasing operations, improve production efficiency.

Drug Polina HELL (TU 2294-076-00302267-2002), which is a water-soluble acrylic polymer of the cationic type and which is the product of the cationic polymerization of polyacrylamide, increases the degree of covalent fixation of the active dye in the dermis, contributes to the filling and seal the front surface of the skin, reduces the potential effect of tbsistuste.

For the best univemity uncommitted covalent bond active dye final flushing of the skin is carried out in the presence of nonionic surfactants, because this value (univemity) determines the stability of the paint to wet treatments. As nonionic surfactants, it is advisable to use "Neonol AF 9-10, which is a viscous fluid is clear or slightly yellow in color based on polyethylene glycol ethers of monoalkylphenols.

Indicators of quality dyeing of leathers presented in the table.

As can be seen from the table, the proposed method of dyeing can increase viviremos active dye, to increase the degree of covalent fixation and get a color, resistant to sweat and wet friction unlike sposibo closest analogue.

Sources of information

1. Kalantarov IA and other Research intensification dyeing the skin with active dyes - Izv. higher education institutions. Technology. light industry, 1971, No. 2, p.60-63.

2. Sadykov AU, etc. the Study of the main parameters of the process of dyeing leather for the uppers active dyes - Izv. higher education institutions. Technology. light industry, 1975, No. 5, s.43-47, No. 6, p.36-38.

3. Petrov I. and other Use of active dyes with different reaction systems for dyeing leather. - Izv. higher education institutions. Technology. light industry, 1985, No. 5, p.58-61.

Table.
Options process.Processing optionsThe quality indicators dyeing
Neutral AbiertaDyeingFixation-greasingFlushingVibiraete dye, %The Cove. fix., in terms of vybere pany, %Color stability, points
Deep Dying, %pH bathsKrasi

tel, %
Alize. oil,

g/l
pH bathsPolina

HELL, %
Fat. comp.,

%
Surfactants, g/lto

"sweat"
to the wet friction
15,03,55,01,28,91,84,01,089,3798,185-44-5
24,83,62,51,18,71,9the 3.81,287,4397,655-44-5
34,53,43,00,98,52,24,20,888,6998,5654-5
4the 4.73,54,01,08,82,0the 3.81,186,9897,2854-5
5-2,42,5-8,62,1a 3.90,980,1896,184-54
6-3,12,6-8,91,84,00,874,6295,864-54
7- 4,02,4-8,71,9the 3.81,273,3098.34 per4-54
8-6,62,5-8,52,04,10,966,43for 98.004-54
The placeholder-4,0-5,05,0-8,0-8,5---72,5088,4544

The method of dyeing the leather, including the processes of neutralization of the semi-finished product, dyeing active dye, the subsequent fixation of an alkaline reagent, characterized in that the neutralization is carried out in the presence of the drug "Deep Dying" in the amount of 4.5 to 5.0% by weight of shaved leather, dyeing conduct active dye at a rate of 2.5-5% with a pH of 3.4 and 3.6 in the presence of alizarin oil in the amount of 0.9-1.2 g/l, and the fixation of the dye takes place simultaneously with creasing at pH of 8.5-8,9 sodium hydrogen with a flow rate of 1.3-1.8%, and oiling composition with a flow rate of 3.8-4.2% and the drug "Polina HELL" at a rate of 1.8 to 2.2% by weight of shaved leather, with subsequent washing in the presence of nonionic surface is STN-active substances with a flow rate of 0.8-1.2 g/l



 

Same patents:

FIELD: physical method for leather staining.

SUBSTANCE: claimed simplified method includes spraying of dyeing composition, containing (mass %): diphenylamine 0.3-2.0; tetrabromomethan 5.0-10.0; α-naphthol 0.01-0.03; and balance: methyl methacrylate-based varnish, onto the leather face, followed by ultraviolet exposure with wave-length of 300-400 nm at 25-300C for 0.5-1.0 min. Ferrocene and/or indole may be added in dyeing composition to complete color variety.

EFFECT: leather with improved hydrophobicity and physicochemical resistance.

2 cl, 2 tbl, 3 ex

The invention relates to the technology of black ink compositions on the basis of indoline and soot, which is an intermediate in the production of pigmented oiling compositions, and can be used in leather industry
The invention relates to the leather industry, in particular to a method of treatment of skin obtained from raw materials of cattle intended for the manufacture of Shoe uppers, garments and leather goods
The invention relates to the leather industry, in particular to the method of manufacture of leather from leather obtained from raw materials of cattle intended for the manufacture of Shoe uppers, garments and leather goods
The invention relates to light industry, namely to leather manufacture, and can be used to obtain a dyed intermediate product

The invention relates to light industry and can be used in the production of coating colors for dyeing leather

The invention relates to light industry, and in particular to methods of dyeing of fur skins

The invention relates to leather production, in particular to the production technology of natural leather to get a fashionable color effect

FIELD: dye-boarding industry, in particular textile dyeing preferably from wool fiber.

SUBSTANCE: invention relates to low-temperature wool fiber textile dieing with active dyes. Method includes pretreatment of textile with organic nitrogen containing additive selected from group including amino acid or nitrogen containing enzyme or enzyme selected from oxidoreductases (e.g. peroxidase) at concentration of 0.2-0.5 % in respect to mass of material to be dyed. Dieing is carried out for 120-130 min. Claimed additions to intensify the dyeing process are not-toxic, environmentally friendly, and effective at low concentration.

EFFECT: method for dyeing with improved technological characteristics; dyed protein and cellulose fibers with increased color intensity.

FIELD: dye-boarding industry, in particular textile dyeing preferably from wool fiber.

SUBSTANCE: invention relates to low-temperature wool fiber textile dieing with active dyes. Method includes pretreatment of textile with organic nitrogen containing additive selected from group including amino acid or nitrogen containing enzyme or enzyme selected from oxidoreductases (e.g. peroxidase) at concentration of 0.2-0.5 % in respect to mass of material to be dyed. Dieing is carried out for 120-130 min. Claimed additions to intensify the dyeing process are not-toxic, environmentally friendly, and effective at low concentration.

EFFECT: method for dyeing with improved technological characteristics; dyed protein and cellulose fibers with increased color intensity.

FIELD: leather industry.

SUBSTANCE: invention relates to area of dyeboarding operations in leather production, in particular to a method of dyeing genuine leather with active dyes including intermediate product neutralization, active dye dyeing and subsequent fixation with alkaline reagent. According to invention, neutralization is effected in presence of preparation "Deep Dying" in amount 4.5-5.0% of the weight of planned leathers, dyeing is effected with active dye consumed in amount 2.5-5% at medium pH 3.4-3.5 in presence of 0.9-1.2 g/L alizarin oil, and fixation of dye is performed simultaneously with greasing at medium pH 8.5-8.9 with sodium hydrocarbonate consumed in amount 1.3-1.8%, greasing composition in amount 3.8-4.2%, and "Polinap AD" in amount 1.8-2.2 of the weight of planned leathers. Finally leather is rinsed in presence of nonionic surfactant consumed in amount 0.8-1.2 g/L.

EFFECT: optimized dyeing composition and dyeing conditions.

1 tbl, 9 ex

Active monoazo dyes // 2287542

FIELD: dyes.

SUBSTANCE: invention relates to active dyes designated for staining or printing of hydroxy- or nitrogen-containing organic substrates. Invention describes novel monoazo dyes comprising sulfatoethylsulfonyl groups of the formula (1) given in the invention description, mixtures of dyes and their using for staining or printing of hydroxy- or nitrogen-containing organic substrates and in dyes for jet printing. Proposed dyes provide the enhanced light resistance of painting and mixtures of dyes comprising the proposed dye possess the enhanced dyeing capacity as compared with individual dyes.

EFFECT: improved and valuable properties of dyes.

8 cl, 3 tbl, 45 ex

FIELD: textile dyeing processes and dyes.

SUBSTANCE: invention relates to coloration of synthetic polyamide fiber, in particular carpet-destination polyamide materials. Invention provides red reactive dye (1) and tricolor dyeing and printing process wherein at least one red reactive dye of formula: is used in combination with at least one of yellow or orange reactive dyes having following formulas: , , and at least one pale blue reactive dye of formula: .

EFFECT: enabled multicolor dyeing characterized by uniformity and intensity of coloration and high resistance to wet treatments.

15 cl, 1 tbl, 9 ex

FIELD: dyes and dyeing processes.

SUBSTANCE: invention relates to a process of dyeing or printing on hydroxy- or nitrogen-containing organic substrates with active dye mixtures. Invention describes triad dyeing or printing process using dye mixture containing (i) red coloring compound of formula (I): (I), where R1 represents saturated or unsaturated C1-C4-alkyl; R3 and R4, independently of each other, represent H, OH, CN, C1-C2-alkyl, SO3H, COOH, O-C1-C2-alkyl, or NH2; X is halogen atom; and Y is -CH=CH2 or -CH2CH2-Z (Z = alkali-cleaved moiety); (ii) yellow or orange coloring compound and blue coloring compound. Mixtures of active compounds for triad dyeing or printing as well as hydroxy- or nitrogen-containing organic substrates printed therewith are also described.

EFFECT: achieved high compatibility of dyes resulting in quality triad dyeing or printing.

FIELD: chemistry.

SUBSTANCE: invention relates to novel asymmetrical and symmetrical active dioxazine dyes of formula (1), meant for dyeing and printing hydroxy- or nitrogen-containing fibre materials. (1), where Q1 is hydrogen, halogen or a radical of formula (2a) or (2b), T is a group which is reactive towards fibre -CO-(CH2)m -SO2-Y, where Y is vinyl or - CH2-CH2-U, where U is a group which is removable in alkaline conditions; m equals 2, 3 or 4. Disclosed also is a method of producing said dyes (1) and use thereof.

EFFECT: dyes have high degree of selectivity, fixation, stability of the fibre-dye bond with good resistance to light and wet treatment.

10 cl, 4 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to novel reactive dyes for dyeing or printing on fibrous textiles. Described are reactive dyes of formula (1), where A is bivalent radical of formula , or , R1-R7, X, T, q, s, t, u assume values given in the claim. The invention also describes a method of producing said dye, water-based ink based thereon and use thereof.

EFFECT: disclosed dyes provide high resistance of the dye or drawing on synthetic nitrogen- or hydroxy-containing fibrous materials to washing and light, especially on polyamide fibrous materials.

14 cl, 5 ex

FIELD: physical method for leather staining.

SUBSTANCE: claimed simplified method includes spraying of dyeing composition, containing (mass %): diphenylamine 0.3-2.0; tetrabromomethan 5.0-10.0; α-naphthol 0.01-0.03; and balance: methyl methacrylate-based varnish, onto the leather face, followed by ultraviolet exposure with wave-length of 300-400 nm at 25-300C for 0.5-1.0 min. Ferrocene and/or indole may be added in dyeing composition to complete color variety.

EFFECT: leather with improved hydrophobicity and physicochemical resistance.

2 cl, 2 tbl, 3 ex

FIELD: leather industry.

SUBSTANCE: invention relates to area of dyeboarding operations in leather production, in particular to a method of dyeing genuine leather with active dyes including intermediate product neutralization, active dye dyeing and subsequent fixation with alkaline reagent. According to invention, neutralization is effected in presence of preparation "Deep Dying" in amount 4.5-5.0% of the weight of planned leathers, dyeing is effected with active dye consumed in amount 2.5-5% at medium pH 3.4-3.5 in presence of 0.9-1.2 g/L alizarin oil, and fixation of dye is performed simultaneously with greasing at medium pH 8.5-8.9 with sodium hydrocarbonate consumed in amount 1.3-1.8%, greasing composition in amount 3.8-4.2%, and "Polinap AD" in amount 1.8-2.2 of the weight of planned leathers. Finally leather is rinsed in presence of nonionic surfactant consumed in amount 0.8-1.2 g/L.

EFFECT: optimized dyeing composition and dyeing conditions.

1 tbl, 9 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

Up!