The method of producing dye direct black 3 for skin and fur sheepskin

C09B35/46 - the component K being an amino naphthol


(57) Abstract:


Same patents:

FIELD: fur industry.

SUBSTANCE: invention, in particular, relates to finishing hair side of fur and may be utilized to restore consumer's properties of fur articles. Dyeing of fur is carried out in dye bath containing (i) dissolved in isopropyl alcohol, acid dye taken in amount 1.3-1.5 g/L, while amount of isopropyl alcohol constitutes 4-6% of the volume of dye bath; (ii) tetrachloroethylene at liquid coefficient 20-25; and cationic surfactant in amount 1.0-1.5 g/L, followed by addition of formic acid in amount 40-50% of the weight of dye and conducting dyeing at 50-55°C for 2.0-2.5 h, after which fur is washed with tetrachloroethylene and then solvents from dye and washing bathes are regenerated. Method also enables restoration of consumer's properties of fur articles after dry-cleaning due to insignificant shrinkage of leather tissue.

EFFECT: improved environmental condition due to increased efficiency regeneration of solvents and reduced amount non-utilizable toxic wastes with properties of dyed fur preserved.

3 tbl, 25 ex

FIELD: fur industry, in particular, equipment for application of pattern and coloring of fur.

SUBSTANCE: apparatus has frame and support for accommodation of article, drive and driven shafts mounted on frame and on supports and equipped with sprockets for receiving thereon of two chain contours and drive sprocket on one of shafts, said drive sprocket being kinematically connected to step engine. Pipes of different lengths are attached to lower part of frame, said pipes being made in the form of multiple-row comb. Pipes are arranged in each comb row as their length is reducing and are positioned so that their angles of inclination relative to direction of advancement of article to be colored may be adjusted so as to reach intersection of sprays of atomized colorant with one another. Nozzles are fixed at the ends of each pipe. Depending on length and thickness of fur hair, depth of deepening of comb and distance between comb rows may be adjusted. Main pipes positioned between reservoirs filled with colorants are extending through colorant blowing device to which control unit is connected. Colorant is dosed and distributed through pipes by means of slide valves mounted on mains which may switch set of reservoirs filled with colorants to pipes for producing of multicolor image on surface.

EFFECT: increased efficiency by computerized, quick and high-quality shadeless coloring of fur, as well as application of compound multicolor patterns.

4 cl, 4 dwg

FIELD: personal use articles.

SUBSTANCE: method is described for dyeing of semi-finished fur article by dispersed dyes, including its treatment with dye in liquid medium, such as carbon dioxide in supercritical condition, produced in tight chamber at the pressure of 150-200 atmospheres and temperature of 40-60C, where semi-finished fur article is placed in advance, as well as dye in amount of 0.2-0.25% of weight of treated semi-finished article. Duration of treatment is 50-60 minutes.

EFFECT: method makes it possible to eliminate preparatory processes of retanning and neutralisation, aqueous medium of treatment, drying of semi-finished fur article, using auxiliary materials and acids, reduces technological processes, provides for more sparing treatment.

1 tbl, 1 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

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