20results about "Disazo dyes" patented technology

The invention discloses a bisazo blue reactive dye for high-temperature dip dyeing as well as a preparation method and application of the bisazo blue reactive dye. The reactive dye is shown in a structural general formula (I). A color body of the reactive dye is of a bisazo structure, the color body contains two naphthalene ring structures and a benzene ring structure, and an active group in a dye molecular structure is quaternary ammonium salt containing a nicotinic acid structure. According to the present invention, the binding force between the dye and the fiber can be improved through the coplanarity of the chromophore molecules, the dissociation between the dye and the fiber at the high temperature can be reduced, and the dye uptake of the dye at the high temperature can be improved, such that the fixation rate between the dye and the fiber can be improved; meanwhile, quaternary ammonium salt containing a nicotinic acid structure can react with fibers under the high-temperature neutral condition, an alkaline agent does not need to be added in the whole dyeing process, the problem of environmental pollution caused by the alkaline agent in the printing and dyeing wastewater is solved, and wide application prospects are achieved.

The invention provides a liquid red direct dye and a preparation method thereof, and the method comprises the following steps: S1, dispersing 2-amino-5-naphthol-7-sulfonic acid and bis (trichloromethyl) carbonate in water, adjusting the pH value of a reaction system by using a first organic base, and reacting to obtain a scarlet acid aqueous solution; s2, dispersing a sulfo aromatic amine compound and nitrite in water, adjusting the pH value of a reaction system by using inorganic acid, reacting to obtain sulfo aromatic amine diazonium salt precipitate, and performing solid-liquid separation to obtain sulfo aromatic amine diazonium salt; and S3, adding the sulfonic aromatic amine diazonium salt in the step S2 into the scarlet acid aqueous solution in the step S1, adjusting the pH value of the reaction system by using second organic alkali, and reacting to obtain the liquid red direct dye. Through the preparation method, the red direct dye which can stably exist in a liquid form and is suitable for direct use can be obtained.

This invention discloses a method for preparing an aromatic amine-free organic pigment yellow, comprising the following steps: S1, preparing a diazo solution by sequentially adding water, inorganic acid, and diazo components to a diazo tank, stirring and slurrying, then cooling the mixture in the diazo tank to below 0°C and adding nitrite; S2, preparing a coupling solution by sequentially adding water, inorganic alkali, and coupling components to a dissolving tank, stirring and dissolving until clear; S3, coupling reaction by adding water, acetic acid, and surfactant to a coupling tank, stirring and mixing evenly, then slowly adding the diazo solution and coupling solution simultaneously to the coupling tank for a coupling reaction; S4, pigmentation by heating to above 60°C and maintaining the temperature, adjusting the pH of the solution to alkaline; S5, filtering, washing, and drying to obtain an aromatic amine-free organic pigment yellow. This invention is applicable to the synthesis of most mono- and diazo organic pigment yellows, reducing aromatic amine residues during the synthesis process and ensuring that the organic pigment yellow product is free of aromatic amine residues.

The invention provides a direct coupling type double-chromophore disperse dye as well as a synthesis method and application thereof, and belongs to the technical field of disperse dyes. Introducing a reaction active group into the coupling component I to obtain a coupling component I containing the reaction active group; directly coupling a coupling component II with a reaction site with a coupling component I containing a reaction active group to obtain a coupling component with double coupling sites; the coupling component of the double coupling sites and the diazo component are subjected to bilateral coupling, and the direct coupling type double-chromophoric disperse dye is obtained.

The invention discloses a method for synthesizing a high-performance organic pigment by a high-concentration system. The method comprises the following steps: preparing raw materials or a raw material mixture; preparing a high-viscosity system, preferably carrying out forced mixing, and reacting under control conditions; and after the reaction is finished, carrying out post-treatment to obtain high-performance organic pigments such as azo series pigments, azo condensation series pigments, diketopyrrolopyrrole series pigments and the like. According to the synthesis method, the problems that in the traditional high-performance organic pigment production process, a large amount of solvent is adopted, and the energy consumption and the circulation cost in the rear-end separation process are high are solved, and the cost consumed by solvent recovery and wastewater treatment in the whole process is reduced.

To reduce the viscosity of a coloring composition containing a pigment.SOLUTION: The coloring composition contains a compound represented by formula (I), and a pigment. [In formula (I), L1 represents a group represented by formula (ph1); R1 to R4 each independently represent a hydrogen atom, a hydrocarbon group that may have substituents, a heterocyclic group, -SO3 N(R5)4, a cyano group, or a halogen atom, provided that at least one of R1 to R4 is -SO3 N(R5)4, or a hydrocarbon group having one or more -SO3 N(R5)4 groups as substituents; and R5 represents a hydrogen atom or a hydrocarbon group, where multiple occurrences of R5 may be identical or different.]SELECTED DRAWING: None

The present invention addresses the problem of providing a colored fiber having excellent heat generation suppression and fastness. The present invention also addresses the problem of providing a method for manufacturing the colored fiber, and a fiber product.　This colored fiber includes fibers and a compound represented by formula (1).

Disclosed herein are compositions comprising a dimeric (diarylide) pigment and a synergist having a structure similar to the monomer of the dimeric pigment. The synergist is also disclosed. Aqueous dispersions and ink-jet inks comprising such compositions are also disclosed.

The invention discloses pigment yellow 83 and a preparation method thereof, and relates to the technical field of pigments, in the pigment yellow 83, 3, 3 '-dichlorobenzidine is taken as a diazo component and is coupled with acetyl-4-chloro-2, 5-dimethoxyaniline, and modified rosin prepared by copolymerization of rosin, monoethyl maleate and cetyl alcohol is introduced in the later stage of reaction; and then mixing with calcium chloride and other raw materials. Carboxyl and long-chain alkyl are introduced into the modified rosin, so that hydrophilic-hydrophobic balance of the surface of the pigment is realized, and compatibility and dispersion stability with a coating system are enhanced; the calcium chloride can promote the pigment to be separated out from a water phase to form solid particles and can be further combined with carboxyl in the modified rosin, so that particle aggregation is inhibited, and the solubility of the modified rosin in pigment molecules is improved. The pigment yellow 83 has the advantages of being good in hydrophobic performance, coloring strength and dispersing performance.

The application provides a preparation method of direct-spun brown, and belongs to the technical field of dye synthesis, and comprises the following steps: 1) mixing and reacting 4,4'-diamino benzoyl toluidine with a sodium nitrite solution under low-temperature conditions to generate a diazonium salt solution; 2) controlling the speed of dropping the diazonium salt solution into a coupling component, stirring and reacting to obtain a primary coupling product solution; 3) in the presence of a biodegradable cosolvent, the primary coupling product solution is added into gamma acid in batches for mixing and reacting, and the material concentration in the reaction system is controlled, and when the solid content of the reaction solution is greater than or equal to 45 %, the reaction is considered to be completed, and a secondary coupling product solution is obtained; and 4) directly performing spray drying on the secondary coupling product solution to obtain a direct-spun brown product. The method improves the standard degree and saturation of the color light of the product, the color light deviation ΔE is less than or equal to 1.0, the saturation reaches more than 95 % of a standard sample, the solid content of the secondary coupling reaction is improved, the purification process is eliminated, and the production cost is reduced.

The present application provides a kind of red direct dye, the red direct dye includes the compound with formula (I) shown as follows: Wherein, R1, R2, R3, R4, R5, R6 each independently is H, -SO3M, -NO2, -OCH3 or halogen, M is H, Na or K.The red direct dye and its composition of the present application are bright and brilliant, high fastness to sunlight, and excellent in environmental protection (without aniline) performance.The preparation method of the red direct dye and its composition of the present application has less wastewater, and is friendly to the environment.

The object of this invention is to provide a color-curable resin composition that can reduce crosstalk in color filters. [Solution] The present invention relates to a colored curable resin composition comprising a colorant, a resin, a polymerizable compound, and a polymerization initiator, wherein the colorant comprises a first pigment composed of at least one selected from an orange pigment and a red pigment, and a yellow pigment, the first pigment comprises a diketopyrrolopyrrole pigment and an azo pigment, and the yellow pigment comprises CI Pigment Yellow 180.

According to the production method of the brand new environment-friendly pigment yellow 83 in the aspect of application, on the basis of a traditional production process, materials obtained after coupling reaction are subjected to filter pressing and washing, organic impurities and salt are removed, then a special high-speed beating machine is used for conducting high-speed beating on a filter cake, high-temperature and pressure treatment is conducted in a pressure kettle, and the pigment yellow 83 is obtained. According to the process, pigment particles are more sufficient in crystal transformation, more stable in crystal form and narrower in particle size distribution, and the obtained pigment yellow 83 is higher than industrial standards in terms of high gloss, high transparency and the like and does not contain forbidden aromatic amine or toxic substances.

An object that is to be achieved by the present invention is to provide an azo pigment having excellent transparency, suitable dispersibility, and a low viscosity, an ink, and the like. An azo pigment according to the present invention has a zeta potential of −80 to −30 mV in isopropanol (IPA). The content of a metal element in the azo pigment is preferably 0.05 to 2.00 parts by mass relative to 100 parts by mass of the azo pigment. The metal element is preferably an iron element. The ratio (Fe / C) of the concentration Fe (atomic %) of an iron element in the surfaces of particles of the azo pigment to the concentration C (atomic %) of a carbon element in the surfaces of the particles of the azo pigment which are determined by X-ray photoelectron spectroscopy is preferably 0.20 or less.

The present invention provides: a compound represented by formula 1, a tautomer of the compound, and a salt of the compound or tautomer; a method for producing the compound, tautomer or salt; a coloring composition and a dyed article, each of which contains a compound represented by formula 1, a tautomer of the compound, or a salt of the compound or tautomer; and a dyeing method which uses a compound represented by formula 1, a tautomer of the compound, or a salt of the compound or tautomer. In formula 1, X, R, Ar, n and m1 are as defined in the description.

Provided is a colored liquid comprising: a colorant having a naphthalene skeleton in the molecule; a compound having two or more naphthalene skeletons in the molecule (which is neither the colorant having a naphthalene skeleton in the molecule nor a compound having a pyrazine skeleton in the molecule) and / or a compound having a pyrazine skeleton in the molecule (which is not the colorant having a naphthalene skeleton in the molecule); and water. Also provided are a colored-liquid set including the colored liquid, a recording medium on which the colored liquid or the colored liquids of the set have been deposited, and a coloring method in which the colored liquid or the colored-liquid set is used.

A laundry detergent composition comprising: (i) from 2 to 70 wt. % of a surfactant; and (ii) from 0.00001 to 0.1 wt. % of a poly-alkoxylated blue or violet bis-azo dye comprising at least one polyalkoxy group which is end-terminated by a -COOH group.

Provided are a dichroic dye with improved filtration and stability over time, a composition containing the same, a film formed from the composition, a laminate including the film, and a display device including the laminate. 【Solution means】A dichroic dye containing at least two or more azo compounds represented by the following formula (1), and satisfying the following formulas (2), (3), and (4) simultaneously. TIFF2026058670000017.tif26136δD d =(δD max -δD min ) / δD max ≧ 0.04 (2) δP d =(δP max -δP min ) / δP max ≧ 0.20 (3) δH d =(δH max -δH min ) / δH max ≧ 0.20 (4)

The invention discloses an ornamental blue azo derivative as well as a preparation method and application thereof, and relates to the technical field of dye compounds. According to the observation blue azo derivative provided by the invention, the observation blue mother nucleus is subjected to azo modification, and aryl phenol and / or arylamine are bridged with the observation blue mother nucleus by utilizing azo groups, so that the solubility of leuco acid formed by reduction of observation blue in dye liquor can be improved, the dyeing condition of the observation blue becomes milder, and the dyeing effect is better. The dyeing degree of 95% or above and the fixation rate of 92% or above can be obtained under the alkalescence condition of pH 7-8, the color depth is not lower than 9.2 K / S, and the color depth is remarkably superior to that of parent blue.