Acid dicatorial for natural skin

C09B31/072 -


(57) Abstract:

The inventive acid dicatorial formula (see drawing) for dyeing leather, wool fabric in red color. It is produced by the combination of acid red progesteronee 4.4-diaminodiphenylsulfone with a solution of N-acid and further coupled in an alkaline medium obtained diazoaminobenzene with acid solution Neuville-winter. New dicatorial has improved physico-chemical properties. Solubility in water is 4 points, resistance to distilled water - 5/3/3, to friction - 4 - 3 points. table 1.

The invention relates to the field ergicheskoi chemistry, vodorastvorimogo diazatricyclo, which can be used in industry for dyeing natural leather in red color.

Known dicatorial formula:

NHCO-NH coloring the skin red. The dye is obtained by combination of the slightly acidic environment diazotized nationway acid red acid, and the resulting monoisocyanates in an alkaline environment combined with diazotized 2-aminoanisole [1].

The disadvantages of dye are:

low solubility in water (2 points, 11-20 g/l);

low stoichiometries with increased solubility and improved physico-chemical properties. This goal is achieved by the new structure of acid dissociates the following formula:

coloring natural leather in red color.

It is obtained by the combination in an acidic environment progesteronee 4,4'-diaminodiphenylsulfone with a solution of acid and further coupled in an alkaline medium obtained diazoaminobenzene with acid solution Neuville-winter.

The structure of the dye is confirmed by IR and electronic spectra. The IR spectrum manifest stretching vibrations of the groups-NH and HE in the field 3600-3300 cm-1in a broad band. Deformation vibrations of N-H give absorption bands 1650 cm-1and 1530 cm-1. The latter overlaps the vibrations of aromatic rings (1500 cm-1and 1410 cm-1. Typical out-of-plane deformation of aromatic structures also cause absorption bands: 1155 cm-1, 930 cm-1, 850 cm-1. A weak absorption band at 1320 cm-1stretching vibrations of S-N sulfamic group. The second band, characteristic for this group appears at 1140 cm-1, overlapping each other with band symmetric stretching vibrations of S=0 sulfo (1180 cm-1and stretching vibrations of C-O PP is located at 1380 cm-1. The band at 1280 cm-1refers to the stretching oscillation of the C-N amine groups, and a broad band of medium intensity at 620-630 cm-1cause out-of-plane deformation vibrations of hydroxyl and fan vibrations of N-h In the visible region of the electronic spectrum is manifested intense band at max. 500 nm.

The content of the pigment is determined according to GOST 16922-71 recovery isogroup sulfate vanadium and is 62,4-64,7%.

Elemental analysis for C32H22N63O10Na2< / BR>
Found, %: C 30,75; 30,86; H 1,77; 1,83; N 7,34; 7,68; S 6,61; 7,68.

Calculated, %: C 48,48; H 2,79; N 10, 60; S 12,13;

Low contents of carbon, hydrogen, nitrogen, sulfur associated with the presence of inorganic impurities (sodium chloride, sodium sulfate) in dry dye powder.

The dye obtained according to this invention, dyes natural leather in red color.

Comparative data of the properties of known and proposed dye expressed in table 1.

Specific example:

1. Diazotization 4,4'-diaminodiphenylsulfone.

In chemical beaker on the magnetic stirrer download 2,63 g (0.01 g/mol) 4,4'-diaminodiphenylsulfone and 40 ml of water. The size is up to an excess of nitrous acid and when this excess, the reaction mass is stirred for 1 hour, then remove with a solution of sulfamic acid.

2. Dissolve N-acids.

In the flask was stirred 2.5 g (0,0105 g/mol) And-acid with 20 ml of water. Heated to 30aboutWith load 0.7 g of soda ash to a pH of 7.4. Stir to dissolve.

3. Dissolving acid Neuville-winter.

In the flask is charged with 2.58 g (0,0105 g/mol) acid Neuville-winter, 32 ml of water and stir until dissolved.

4. Combination.

In an acidic suspension disasstable at a temperature of 8aboutWith over 15 minutes to load the cooled solution And acid. Combine 30 minutes pH = 0.8 to 1.0 to negative reactions to isostasy. Then the reaction mass portions over 15 minutes to download the acid solution Neuville-winter. Increase the pH of the reaction mixture of 30% sodium hydroxide solution to 8.4 and stir 3 hours before the end of the combination. Suspension of diazatricyclo filter, pasta washed with 10 ml cold water and dried.

Obtain 7.9 g of dry dye.

Example dyeing natural leather (velour) from the skins of cattle.

Skin, the last in a production environment otlochno-teorico, grinding flesh side, is treated in a solution containing 0.2% (by weight of the treated skin) nonionic drug type OP-10 and 2% ammonia for 2 hours at 55aboutWith LCD 10 with stirring. Stand for 10-12 hours without stirring, then washed in warm water (40aboutC) for 15 minutes. Dyeing is carried out in devices for automatic mixing of the dye bath and maintaining the set temperature. In the apparatus loads the required amount of dye solution (based on a given percentage of the color and weight painted skin) and water from a calculation of obtaining the LCD 15. The dye solution is heated to 60aboutTo download the apparatus of skin and color with constant stirring for 90 minutes. Then in the dyeing bath make a solution of acetic or formic acid, previously diluted 10-fold amount of water. The amount of acid: 50% by weight of dye. Continue to paint within 60 minutes. After dyeing, the samples are washed in warm water (40aboutC) for 15 minutes and dried.

As follows from the presented data suggested the dye has a high solubility (2 points), higher resistance to distilled water (1 Avodah, this will reduce the cost of the proposed dye with simultaneous improvement of color stability.

Acid dicatorial formula

< / BR>
for genuine leather.


Same patents:

The invention relates to the field of aniline-dye industry, in particular to a method for acid yellow monoisocyanates (Dye acid yellow KIS), which can be used for dyeing fur sheepskin

The invention relates to dyes and can be used in the production of pigment concentrates of black color for dyeing leather

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

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