35results about "Disazo dyes" patented technology

To provide: an additive composition for synthetic resin capable of imparting excellent color tone to a synthetic resin; a resin composition; and a molded article thereof.SOLUTION: An additive composition for synthetic resin comprises a compound containing a monovalent group represented by the general formula (1) in the figure, and a colorant. (In the general formula (1), X represents a divalent group, Ar1 and Ar2 each independently represent a phenyl group optionally having a substituent, and * represents a site bonding to another atom.)SELECTED DRAWING: None

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.

The invention belongs to the technical field of pigment preparation, and particularly relates to a preparation method of high-dispersity pigment yellow 83 for plastics and the obtained pigment yellow 83, and the preparation method comprises the steps of diazo liquid preparation, coupling liquid preparation and coupling reaction. Wherein after the diazo liquid is prepared, a polyurethane chain segment-silica gel copolymer is added into the diazo liquid to obtain a modified diazo liquid, and the modified diazo liquid and the coupling liquid are mixed to complete the coupling reaction. According to the invention, the preparation process of the pigment yellow 83 is improved, specifically, the diazo liquid is modified before the diazo liquid and the coupling liquid are coupled, so that compared with the prior art, the dispersity of the pigment yellow 83 in a plastic base material is greatly improved through the improvement mode.

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 discloses an azo compound, a photo-alignment film and a liquid crystal display device. The azo compound provided by the invention has the following structural formula: # imgabs0 #. The azo compound has the characteristics of good orientation performance, high light sensitivity, low temperature and humidity sensitivity and low chromaticity.

A polarizing plate for use in a liquid crystal shutter of a light shaping device, the polarizing plate including an absorption-type polarizer in which a dichroic dye is aligned, the absorption-type polarizer having a maximum absorption wavelength in a wavelength range of 370 to 470 nm, the weighted parallel transmittance Xp380-440 of the polarizing plate being 20% or more, and the weighted orthogonal transmittance Xc380-440 being 0.0001 to 0.1%.

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 an azo dichroic dye and preparation and application thereof, the azo dichroic dye has high solubility, high dichroic ratio and high stability, can be compounded with other azo dichroic dyes to obtain a black dichroic dye composition, has good adaptability with a liquid crystal system, and can be used for preparing a liquid crystal display device. The prepared polaroid has an excellent polarization effect, realizes full coverage of absorption in a visible light range, and can be directly applied to a liquid crystal display and a flexible display screen.

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.

An optical sheet 10 of the present invention includes a laminate including a polarizing layer 4 containing at least one kind of a light absorbing agent and having a polarizing function, and a protective layer 1 laminated on the polarizing layer 4, in which in the polarizing layer 4, a value of a* is 0 or more and 30 or less and a value of b* is 0 or more and 30 or less in an L*a*b* color system defined by JIS Z 8781-4, and in the optical sheet 10, a size of a Q Blue value defined by Australian Standard Australia / New Zealand Standard 1067-2016 is 0.70 or more. Thus, even when the optical sheet is toned to brown, blue light can be distinguished with excellent distinguishability.

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 invention belongs to the technical field of pigment preparation, and particularly relates to a post-treatment method of a permanent yellow pigment crude product and the obtained permanent yellow pigment, and the post-treatment method comprises the following steps: S1, dispersing the permanent yellow pigment crude product in a pigment emulsifier to form a pigment emulsion; s2, the temperature of the pigment emulsion is controlled to be gradually reduced to reach or below the freezing point of the pigment emulsion, and frozen pigment emulsion is obtained; s3, crushing and ball-milling the frozen pigment emulsion by using an ultrasonic crusher to obtain pigment ice crystals, and transferring the pigment ice crystals into a freeze-drying chamber for freeze-drying treatment to obtain pigment crystals; and S4, adding the pigment crystals into the ethanol mixture of the cellulose nanocrystals to obtain the permanent yellow pigment. The coloring performance of the pigment can be remarkably improved by post-processing the permanent yellow pigment crude product, and compared with the prior art, the stability of the high coloring performance of the pigment is further improved by changing the mode that the pigment emulsion reaches the icing state.

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 invention provides a polarizing film and a method for producing the polarizing film capable of suppressing decoloration and thermal shrinkage. A polarizing film according to an embodiment of the present invention is a polarizing film of 10 [mu] m or less containing a polyvinyl alcohol resin, and contains at least a first dye that is an azo compound having a ureido skeleton represented by formula (1) or a salt thereof.

The invention belongs to the technical field of pigment preparation, and particularly relates to pigment yellow 83 for rubber products and a preparation method thereof, and the preparation method comprises the steps of diazo liquid preparation, coupling liquid preparation and coupling reaction. Wherein after the coupling reaction, the pigment strengthening step is carried out, a mobility improver is added into the reaction liquid for treatment, and the mobility improver is one or a mixture of more of polycarboxylate, a polyether block copolymer or a siloxane modified polymer. By adding the mobility improver, the mobility resistance of the pigment yellow 83 in a rubber product is remarkably improved, especially the pigment yellow 83 has excellent performance in a soft rubber product, and the mobility of the pigment yellow 83 is effectively controlled even under the condition of high temperature or high plasticizer content. And the phenomena of spots, stripes or color fading on the surface or in the product are avoided.

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.

Provided is a coloring liquid containing: a pigment having a naphthalene skeleton in the molecule; at least one compound selected from compounds having two or more naphthalene skeletons in the molecule (excluding the pigment having a naphthalene skeleton in the molecule and compounds having a pyrazine skeleton in the molecule) and compounds having a pyrazine skeleton in the molecule (excluding the pigment having a naphthalene skeleton in the molecule); and water. Also provided are a coloring liquid set including the coloring liquid, a recording medium to which the coloring liquid or each coloring liquid included in the coloring liquid set is attached, and a coloring method using the coloring liquid or the coloring liquid set.

The present invention addresses the problem of providing a coloring composition by which it is possible to form a color filter excelling in UV ashing resistance. This problem is solved as a result of a coloring composition including a coloring agent, which contains a compound represented by formula (I), and an alkali-soluble resin. [In formula (I), L1 denotes a group represented by formula (ph1), A denotes a group represented by formula (ia), and B denotes a group represented by formula (ib).]

The invention discloses a pigment yellow 180 mixing reaction kettle with a post-treatment function, which comprises a kettle body, a stirring shaft driven by a motor to rotate is introduced into the middle of the kettle body, a plurality of stirring paddles for stirring during rotation are arranged on the stirring shaft, the stirring paddles are arranged up and down at intervals, and a plurality of stirring paddles are arranged at the same height along the circumferential direction of the stirring shaft. A homogenizing feeding seat is mounted at the upper part of the stirring shaft, the homogenizing feeding part comprises an annular temporary storage seat, the interior of the temporary storage seat is hollow, and the upper part of the temporary storage seat is integrally connected with a feeding channel communicated with the temporary storage seat. The homogenizing feeding part is mounted on the upper portion of the stirring shaft, rotation of the stirring shaft is gradually increased in a stepped mode, so that materials fall from discharging grooves in different radial positions of the homogenizing feeding part, the circumferential falling positions of pigments are different at different rotating speeds, the feeding uniformity can be further improved, and local pigment gathering during feeding is reduced.

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.