95results about "Monoazo dyes" patented technology

A compound represented by formula (1) or formula (11).　X-A1-(N=N-A2)n-N=N-A3-Y … (1) (In formula (1), -A1- and -A2- each independently represent a divalent group of an optionally substituted aromatic heterocycle including one or more S atoms in which atoms other than carbon atoms constituting the aromatic heterocycle are not adjacent, a divalent group of an optionally substituted benzoisothiazole ring, or a divalent group of an optionally substituted aromatic hydrocarbon ring, -A3- represents a divalent group of an optionally substituted aromatic hydrocarbon ring, -X represents a branched C3 or higher alkyl group, alkoxy group, or alkylsulfanyl group, -Y represents a monovalent organic group, and n represents 1, 2, or 3.　When n is 2 or 3, the multiple -A2- may be the same or different.　However, -A1- and -A2- are not both divalent groups of an optionally substituted aromatic hydrocarbon ring.)　X-A41-(N=N-A42)n-N=N-A43-Y … (11) (In formula (11), at least one -A42- is a divalent group of an optionally substituted aromatic heterocycle including one or more S atoms, -A41- and -A43- each independently represent a divalent group of an optionally substituted aromatic hydrocarbon ring, X represents a branched C3 or higher alkyl group, alkoxy group, or alkylsulfanyl group, -Y represents a monovalent organic group, and n represents 1, 2, or 3.　When n is 2 or 3, the multiple -A42 may be the same or different.)

The invention relates to the field of dye chemistry, and discloses an acid dye with high color fastness, a preparation method of the acid dye and application of the acid dye in textile dyeing. According to the dye molecule, a 4-sulfo benzene ring and a 2, 5-dichlorobenzene ring are connected through an azo bridge (-N = N-), and a polysulfonate substituent group (-SO3Na) is introduced to a molecular skeleton to form a symmetric azo conjugated structure. The preparation method comprises the steps of nitration, reduction, sulfonation, diazotization, coupling and the like, the process conditions are mild, and the yield is stable. The obtained dye has a strong absorption peak in the range of 540-560nm, and the molar absorption coefficient epsilon is greater than or equal to 1.0 * 10 < 5 > L.mol <-1 >. Cm <-1 >. Compared with the conventional acid red dye, the dye has the advantages that the light fastness can reach grade 8, the fastness to washing is grade 7 or above, the color is bright, the color layer is uniform, the high dye-uptake can be realized under the low-salt condition, the conductivity of waste liquid is remarkably reduced, and the dye is suitable for dyeing protein fibers such as wool, nylon and silk.

To provide a polarization film having a non-polarization part, excellent in a shape maintenance performance of the non-polarization part, while preventing the non-polarization part from re-coloring.SOLUTION: A polarization film is composed of a resin film including a dichroic organic pigment, and includes a non-polarization part. In one embodiment, when the polarization film is put in a wet heat test standing under a 65°C and 90%RH environment for 24 hours, a change rate in the polarization film is 3.0% or less with regard to a circumference of the non-polarization part before and after the wet heat test. In another embodiment, when the polarization film is put in the wet heat test standing under a 65°C and 90%RH environment for 24 hours, a change rate in the polarization film is 5.0% or less with regard to an area of the non-polarization part before and after the wet heat test.SELECTED DRAWING: Figure 1

To provide a polypropylene colored resin composition that excels in color development, washing resistance, and sublimation resistance and can be stably supplied.SOLUTION: A polypropylene colored resin composition contains a polypropylene resin and a colorant, the colorant including a compound of a predetermined structure.SELECTED DRAWING: None

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 application discloses a preparation method of acid and alkali resistant toluidine red pigment, belongs to the technical field of pigment synthesis, and introduces di-primary amine on a modified toluidine red pigment, then reacts with a dicarboxylic compound, and finally is prepared through hydrolysis and self-assembly; the modified toluidine red pigment is prepared through the following steps that 3-amino-4-nitrobenzyl alcohol is diazotized and then coupled with 2-naphthol; the acid and alkali resistant toluidine red pigment prepared by the application not only has bright color and good hiding power, and also has high coloring strength, light resistance, water resistance, oil resistance and dispersibility, and simultaneously has strong acid and alkali resistance and environmental stability, and significantly improves the application performance of the pigment.

To provide a colored composition for color filters that exhibits high contrast ratio due to low aggregation of pigments, fewer film defects in the coating even when stored for a long period under temperature fluctuations, and good pattern characteristic dependence with respect to the time from application to exposure when used as a colored curable composition. To provide a colored curable composition for color filters, a color filter, a solid-state image sensor, and an image display device using the colored composition for color filters. [Solution] A coloring composition for color filters comprising a pigment (A), a dye derivative (B), a resin-type dispersant (C), and an organic solvent (D), wherein the dye derivative (B) comprises a compound having a heterocycle (B1), a compound having a heterocycle (B2), and a compound having a heterocycle (B3), and the mass ratio of compounds (B1) to (B3) satisfies a specific range.

The invention discloses an azo compound as well as a preparation method and application thereof, belongs to the field of dye chemical industry, and particularly provides the azo compound which is of a structure as shown in a general formula I. The azo compound disperse dye disclosed by the invention has excellent pH dependency and thermal migration resistance, and is especially suitable for dyeing application of polyester-cotton fabrics.

An illustrative surgical system may access a plurality of images captured outside a structure within a patient; detect a difference between spectral reflectances of scenes captured in the plurality of images; and identify, based on the detected difference between the spectral reflectances of the scenes captured in the plurality of images, pixels in at least one of the plurality of images that correspond to structure tissue of the structure.

The invention provides an environment-friendly disperse dye and a preparation method thereof. The preparation method comprises the following steps: a pretreatment step: refining 3, 4-dichlorophenyl thiourea by using an organic solvent to obtain refined 3, 4-dichlorophenyl thiourea; a closed loop step: under an acidic condition, the refined 3, 4-dichlorophenyl thiourea is subjected to closed loop to obtain a thiazole mixed slurry, and the thiazole mixed slurry comprises 2-amino-5, 6-dichlorobenzothiazole and 2-amino-6, 7-dichlorobenzothiazole; a diazotization step: under an acidic condition, carrying out a diazotization reaction on the thiazole mixed slurry and a diazotization reagent to obtain a diazotization liquid; and a coupling step: carrying out a coupling reaction on the diazonium liquid and an esterification reagent, and carrying out crystal transformation to obtain the environment-friendly disperse dye. The environment-friendly disperse dye disclosed by the invention is qualified in environment-friendly index, high in yield and purity and suitable for mass production.

This invention relates to a novel heterocyclic azo disperse dye and its preparation method. The dye has the following structural formula: R1, R2, R3, H, CH3, NHCOCH3; D1 is a substituted benzothiazole or benzoisothiazole. The compound provided by this invention can be used as a dye for dyeing polylactic acid fibers, and has the characteristics of high dyeing rate, bright color, excellent color fastness and strong industrial feasibility.

The present invention relates to a process of preparation of Solvent Blue 67 dye for various applications like printing ink, stationery ink, wood stains, aluminium foil coloring, polyester and metals foils, glass, plastic and metal coatings, leather and plastic coloration / finishing, hot stamping foil coloring, etc The process (100) of the present invention includes a first stage of reaction with chlorosulfonic acid (110), a second stage of condensation reaction with alkyl / aryl / dialkyl / diaryl / hydroxylalkyl amine organocatalyst (120), a third stage of drying and sieving of the product (130), and a fourth stage of packing and dispatching of final product (140). The process (100) advantageously prepares a residue free Solvent Blue 67 dye and thereby ensures high quality printing and coloring process for various printing and coloring applications.

According to the brand-new environment-friendly pigment red 170 production method, on the basis of a traditional production process, the materials obtained after coupling reaction are subjected to filter pressing and washing, organic impurities and salt are removed, by adding acetic acid, DB-70 can be dissolved more completely, sodium acetate generated through acetic acid and alkali in the subsequent coupling reaction can be used for preparing the pigment red 170, and the pigment red 170 can be obtained. The effect of stabilizing the pH value is achieved; according to the process, pigment particles are subjected to crystal transformation more sufficiently, the crystal form is more stable, the particle size distribution is narrower, the chemical resistance, light resistance, heat resistance and the like of the obtained pigment red 170 are all higher than the industrial standard, and the pigment red 170 is suitable for industrial production. And no forbidden aromatic amine or toxic substance is contained.

To provide a laundry care composition comprising a laundry care ingredient and a polymeric thiophene hueing agent.SOLUTION: A laundry care composition comprises: (i) a laundry care ingredient; and (ii) 0.0001 wt.% to 1.0 wt.% of a polymeric thiophene hueing agent having a structure of Formula I. The polymeric thiophene hueing agent provides a whitening bias on a cellulose-containing textile article when compared to a polyester-containing textile substrate, where the whitening bias is measured via the following formula: (whitening bias)=(change in whitening of the cellulose-containing textile article / change in whitening of the polyester-containing textile article), where the whitening effect is measured via a whiteness index on each textile article.SELECTED DRAWING: None

The invention provides a dye compound, a preparation method thereof, an alkali-resistant high-water-washing disperse dye and application thereof, and particularly relates to the technical field of dye chemical industry. The dye compound has a structure as shown in a formula I, in the formula I, R1 is selected from substituted or unsubstituted nitrophenyl, 6-nitro-benzothiazolyl, 6, 7-dichlorobenzothiazolyl or 5, 6-dichlorobenzothiazolyl; r1 is selected from methyl or hydrogen atom, R2 is selected from methyl or hydrogen atom, R3 is selected from methyl, ethyl, allyl and cyanomethyl, and R4 is selected from bromine, chlorine, cyano or methyl. According to the dye compound provided by the invention, the azo group and R1 act together, so that the dye compound possibly has rich colors; r1, R2, R3 and R4 substituent groups influence the hydrophilic-hydrophobic property of molecules and the binding capacity with fibers, and the affinity of the dye to the fibers is improved, so that the dye uptake is improved. The interaction between a benzene ring or a benzothiazole ring and a substituent group in the structure endows the dye compound with good color fastness.

A dye dispersant containing a composition obtained through sulfo-methylation of lignin, wherein the composition contains 1.5-4.5 mass% of Na2SO4 and has a S-content of 1.0-6.0 mass% in a group represented by formula (1): -SO3M (in formula (1), M represents a hydrogen atom, a monovalent metal salt, or a divalent metal salt).

A latent additive represented by general formula (1): wherein A is a 5- or 6-membered aromatic or heterocyclic ring; R1 and R2 are each hydrogen, halogen, cyano, hydroxyl, nitro, carboxyl, optionally substituted C1-C40 alkyl, C6-C20 aryl, C7-C20 arylalkyl, or C2-C20 heterocyclic ring-containing group; and R4 is C1-C20 alkyl, C2-C20 alkenyl, C6-C20 aryl, C7-C20 arylalkyl, C2-C20 heterocyclic ring-containing group, or trialkylsilyl.

The invention discloses a method for preparing a red pigment by coating nano calcium carbonate with pigment red 2, and belongs to the technical field of pigments. The preparation method comprises the following steps: dispersing nano calcium carbonate into absolute ethyl alcohol to obtain a nano calcium carbonate suspension, and preparing a diazo component A solution and a coupling component B solution; and simultaneously dropwise adding the solution A and the solution B into the nano calcium carbonate suspension, controlling the molar ratio of the raw materials, the reaction temperature and the reaction time, and carrying out post-treatment to obtain the red pigment with the nano calcium carbonate coated with the pigment red 2. The binding force of the pigment red 2 and calcium carbonate in the obtained red pigment is remarkably enhanced, compared with commercially available pigment red 2, the hue, colored light, brightness and tinting strength of the red pigment are not reduced, and the prepared product is expected to replace the commercially available pigment red 2 product to be applied.

The invention belongs to the technical field of organic dyes, and particularly relates to a phthalic acid group-containing monoazo dye as well as a preparation method and application thereof. The preparation method comprises the following steps: adding 4-amino phthalic acid into water, dissolving, and then adding sodium nitrite to obtain a mixed solution; under the stirring condition, adding the mixed solution into an inorganic acid solution, and stirring to react, so as to obtain a 4-amino phthalic acid diazonium salt solution; under a stirring condition, adding the 4-amino phthalic acid diazonium salt solution into the coupling component solution to react; and after the addition is finished, continuously stirring and reacting, adjusting the pH value, filtering and drying to obtain the phthalic acid group-containing monoazo dye. The preparation raw materials of the phthalic acid group-containing monoazo dye are wide in source and low in price, the preparation method is simple, and special production equipment is not needed; the dyeing method is simple to operate, short in dyeing time and high in dyeing efficiency; and the dye can be recycled, so that the production energy consumption and the cost are greatly 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 invention discloses a disperse dye with high sublimation fastness and a preparation method and application thereof, and belongs to the field of dye preparation. The invention relates to a disperse dye with high sublimation fastness, which comprises at least one or a mixture of more than two compounds as shown in a general formula (I): in the formula (I), R1 is independently selected from C1-4 alkyl, CH2CH2OCH3 and CH2CH = CH2; r2 is independently selected from H, Cl, Br and CN; and R3 is independently selected from the group consisting of H, OCH3 and OCH2CH3. According to the method, the disperse violet and the disperse blue can be prepared from cheap raw materials available in the market, and the sublimation fastness of the prepared disperse dye is higher than that of existing disperse violet 93 and disperse blue 291: 1.

An object of the present invention is to provide a colored photosensitive resin composition that has high brightness, good color properties, and excellent solvent resistance, and to provide a high-brightness color filter that has excellent color tones, particularly a color filter that can be used in a liquid crystal display. [Solution] A colored photosensitive resin composition includes a colorant containing a phthalocyanine dye of a specific structure, an alkali-soluble resin, and a photopolymerization initiator. The phthalocyanine dye preferably has a light transmittance of 85% or more at a wavelength of 480 nm when the absorbance at the maximum absorption wavelength is taken as 1. Furthermore, the colorant preferably contains an azo yellow dye or an azo yellow pigment. Furthermore, the above-mentioned problems can be solved by a cured film obtained by curing the colored photosensitive resin composition.

The invention discloses a sulfonate type azo disperse dye with self-dispersing performance, and a preparation method and application thereof, relates to the technical field of fabric dyeing, and aims to solve the problem of lack of a self-dispersing dye capable of achieving optimal balance between a dye molecule hydrophobic skeleton and a hydrophilic sulfonic acid group. According to the technical scheme, the compound is characterized by comprising a compound as shown in a general formula (I), in the formula (I), R1 is H, C1-C4 alkyl, C1-C4 alkoxy, halogen, nitryl or cyano; ar is a benzene ring or a naphthalene ring; m is alkali metal ion Na < + > or K < + >; and n is an integer of 1 or 2. According to the sulfonate type azo disperse dye with the self-dispersing performance, disclosed by the invention, a specific number of sulfonic acid groups are introduced into a specific position of an azobenzene hydrophobic skeleton of the dye, so that perfect unification of the self-dispersing performance, the high-temperature stability and the dyeing performance is realized.

To provide a C.I. Pigment Yellow 180-containing pigment composition that is excellent in dispersibility and storage stability, and has high transparency.SOLUTION: Provided is a pigment composition that contains C.I. Pigment Yellow 180 and an azo compound represented by the following formula. Here, the contained amount of an azo compound represented by the following formula preferably is 0.1 to 30 pts.mass for 100 pts.mass of C.I. Pigment Yellow 180. [In the formula, R1 represents -NR2R3 or -OR4, and R2 to R4 each independently represent H, an alkyl group, an aryl group, or an acyl group.].SELECTED DRAWING: None

The present invention relates to a compound of formula (1): The present invention relates to an azo dye of TIFF2026504705000022.tif57170, a dye mixture containing the azo dye, a method for producing the azo dye, specific uses of the azo dye, and semi-synthetic or synthetic hydrophobic fiber materials dyed or printed with the azo dye or the dye mixture.

The present invention is related to a process for obtaining organic ammonium salts (OAS) and their derivatives, supramolecular surfactants (SS), which simultaneously present the properties of traceability and detergents dispersant of organic scales. Organic ammonium salts (OAS) and their derivatives supramolecular surfactants (SS) have applications as differentiators, markers, or tracers in fuels derived from hydrocarbons; and also to disperse organic scales or inhibit the gums precipitation both in injectors and intake valves of automotive vehicle engines. Organic ammonium salts (OAS) are obtained through an acid-base reaction between a molecule from the azo family and an amine. Once the OAS is obtained, it reacts with an organic compound (OC) so that through non-covalent interactions, a self-assembly process occurs that gives rise to the SS. Said process is based on green chemistry, that is, in the absence of solvents. These OAS and SS are quantified through the analytical techniques of ultraviolet-visible (UV-VIS) and high-performance liquid chromatography (HPLC) through a calibration curve. Additionally, its performance as a gum-dispersing agent in a single-cylinder engine is evaluated.

The present invention relates to the field of isomeric mixture of reactive dyes that are suitable for the dyeing or printing of nitrogen-containing or hydroxy-group-containing fibre materials and yield on such materials dyeings or prints having a good build-up behaviour, a high fixation rate, good washing off properties of the unfixed dyes and good all-round fastness properties, as well as a good stability to various dyeing parameters such as a good bath stability. Furthermore, the present invention relates to a process for dyeing or printing of nitrogen-containing or hydroxy-group-containing fibre materials, wherein the isomeric mixture of reactive dyes according to the invention is used. The isometric mixture of the present invention comprises at least an isomer of formula (Ia) and an isomer of formula (Ib).

The invention discloses a nitrogen heterocyclic ring substituted azopyridone dye and a preparation method thereof, and belongs to the technical field of fine chemical engineering. The structural general formula of the azopyridone dye is shown in the specification (an azo formula and a hydrazone formula are both established), wherein X1, X2, X3, X4 and X5 are respectively and independently selected from one of nitro, hydrogen, halogen atoms, cyano, methyl, isopropyl and methoxyl; r substituent is selected from one of the following structures; an R substituent group is introduced to the N site of pyridone, so that the problem that the solubility of the azopyridone dye in an organic solvent is relatively low can be effectively solved. The solubility of the azopyridone dye disclosed by the invention in an organic solvent is greater than or equal to 5g / 100g, the dye ensures excellent light and heat resistance stability, the color coordinates meet the standard yellow range, and the azopyridone dye has the feasibility of preparing optical devices and full-color high-stability display materials.

This invention relates to a laundry care composition comprising a laundry care ingredient and a polymeric thiophene hueing agent.