158results about "Monoazo dyes" patented technology

The invention discloses a preparation method of a permanent red pigment for an acid and alkali resistant coating, and belongs to the technical field of pigment preparation, a 2B acid derivative is diazotized and then coupled with 2-hydroxy-3-naphthoic acid, then a calcium chloride aqueous solution is added for color lake to obtain pigment particles, and finally the surfaces of the pigment particles are coated with silicon dioxide to obtain the permanent red pigment for the acid and alkali resistant coating. According to the permanent red pigment for the acid and alkali resistant coating prepared by the preparation method disclosed by the invention, the acid and alkali resistance and environmental stability of the pigment are further enhanced while the excellent characteristics of original pigment red 48: 2 are maintained, and the application performance of the pigment is remarkably improved.

The present invention discloses a pyridone azo dye and a preparation method thereof, belonging to the field of fine chemical technology. The general structural formula of the pyridone azo dye is as follows: wherein X1, X2, X3, X4, and X5 are each independently selected from one of nitro, hydrogen, fluorine, chlorine, bromine, cyano, and substituted or unsubstituted phenyl; the R substituent is selected from one of the following structures: By introducing an R substituent at the N position of pyridone, the problem of low solubility of pyridone azo dye in organic solvents can be effectively solved. The solubility of the pyridone azo dye disclosed in the present invention in organic solvents is between 5-9 g / 100 mL, and the molar absorption coefficient of this type of dye is between 20,000-120,000 L·mol ‑1 cm ‑1 It has excellent light and heat stability within the range and is feasible for preparing optical devices and full-color high-stable display materials.

The invention belongs to the field of dyes, and particularly relates to an alkali-washable disperse dye containing carboxylic ester and a phthalic diamide structure and a preparation method of the alkali-washable disperse dye. The invention provides an alkali-washable disperse dye containing carboxylic ester and a phthalic diamide structure, the structural general formula of the alkali-washable disperse dye containing carboxylic ester and the phthalic diamide structure is as follows: # imgabs0. The invention also provides a preparation method of the alkali-washable disperse dye containing carboxylic ester and the phthalic diamide structure, and the preparation method comprises the following steps: preparation of a coupling component, preparation of a diazonium salt solution, and coupling reaction. According to the alkali-washable disperse dye containing the carboxylic ester and phthalic diamide structure, carboxylic ester groups with high polarity exist in the dye structure, the affinity of the dye on polyester fibers can be improved, and therefore the alkali-washable disperse dye is endowed with excellent washing performance and has wide application prospects.

The present invention belongs to the technical field of dyes, and particularly relates to a dye compound, a preparation method thereof and an application. The dye compound provided by the present invention has the structure shown in Formula I. When the dye compound of the present invention is used as a dye, it has high washing fastness, high color yield, a wide pH range of the dyeing bath (pH 4 to 12), and good re-dyeing property.

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.

The present invention addresses the problem of providing a colorant and a colored curable resin composition capable of forming a color filter having better red brightness. The colored curable resin composition contains a colorant, a resin, a polymerizable compound and a polymerization initiator, wherein the colorant contains C.I. Pigment violet 19, a compound represented by formula (I) and a compound represented by formula (II). [In formula (I), X1 represents a hydrogen atom, an aromatic hydrocarbon group which may have a substituent, or a heterocyclic group which may have a substituent, X2 represents a hydrogen atom, a halogen atom, a hydrocarbon group which may have a substituent and has 1-20 carbon atoms,-OR1 or-COOR2, X3 represents a halogen atom, a cyano group, a nitro group, a hydrocarbon group which may have a substituent and has 1-20 carbon atoms,-OR3,-COOR4,-CONR5R6 or-SO2NR7R8, and n represents 1 or 2. ] (In formula (II), L1 represents a divalent aromatic hydrocarbon group which may have a substituent, and X11-X14 represent a hydrogen atom or a hydrocarbon group having 1-20 carbon atoms which may have a substituent. ].

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 an image recording composition with excellent storage stability that enables recording of images with little change in hue.SOLUTION: The image recording composition contains a pigment composition, which comprises a yellow monoazo pigment and a compound represented by general formula (1) different from the yellow monoazo pigment. (In general formula (1), R1 represents an alkyl halide group, an alkoxy halide group, a halogen atom, or a nitro group; and R2 to R5 each independently represent a hydrogen atom, an alkyl group, an alkyl halide group, an alkoxy group, or the like, provided that, if R1 is a halogen atom or a nitro group, then R3 or R4 is an alkoxy halide group; R6 to R10 each independently represent a hydrogen atom, an alkyl group, an alkyl halide group, or the like.)SELECTED DRAWING: None

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

To provide a dye composition for polylactic acid fibers excellent in dye exhaustion of each of a yellow disperse dye, a red disperse dye, and a blue disperse dye, excellent in reproducibility due to equal dyeing speed during dying of each color, and excellent in light-fastness, a dyed product using the same and a dying method.SOLUTION: The dye composition for polylactic acid fibers of the present invention contains a yellow disperse dye represented by compounds of formula (1) and / or formula (2) (DISPERSE ORANGE 61, DISPERSE ORANGE 155), a red disperse dye represented by compounds of formula (3) (DISPERSE RED 167, DISPERSE RED 167.1), and a blue disperse dye which includes compounds represented by formula (4) (DISPERSE BLUE 79, DISPERSE BLUE 79.1) and / or a mixture of two isomers represented by formula (5) (DISPERSE BLUE 54).SELECTED DRAWING: None

The present invention relates to the field of organic dyes, and particularly to an azo disperse dye and a preparation method thereof. The method includes: 1. After the initial reaction of cyanoacetate and organic amine, continue to react with acetoacetate to prepare a pyridone compound; 2. Add an aromatic amine compound to an acid solution and carry out a diazotization reaction with a diazotizing reagent to obtain an aromatic amine diazonium salt solution; 3. Add the pyridone compound to the aromatic amine diazonium salt solution for a coupling reaction to obtain the product. The molecular structure of the azo disperse dye of the present invention has an alkyl chain segment with a "lipophilic-hydrophilic" structure, which is similar to the chain segment structure of polyester fiber and has high affinity, so it has good dyeing performance on fiber materials. At the same time, this alkyl chain segment can make the dye have good dispersibility in water, has the ability to wash off the floating color on the fiber surface, and has excellent wet treatment fastness performance on fiber materials.

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 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 present invention addresses the problem of providing: a dye for dyeing a polyolefin fiber by using supercritical carbon dioxide, the dye being capable of dyeing a polyolefin fiber with a high concentration of yellow and yielding a dyed product having excellent color fastness to light, sublimation, washing, etc.; a dyeing method for dyeing a polyolefin fiber by using supercritical carbon dioxide; a polyolefin fiber dyed by said dyeing method; and a compound. Provided are: a dye for dyeing a polyolefin fiber by using supercritical carbon dioxide, the dye including at least one compound of formula (I); a dyeing method for dyeing a polyolefin fiber by using supercritical carbon dioxide; a polyolefin fiber dyed by said dyeing method; and a compound.

The invention relates to a continuous diazotization process for dye, and belongs to the field of chemical engineering. The method comprises the following steps: mixing and pulping a diazo component and sulfuric acid, pumping into a material preparation kettle, sequentially feeding into a reactor I and a reactor II together with a nitrosyl sulfuric acid solution according to a certain proportion, reacting, feeding one part of effluent of the reactor I into the reactor II, continuing reacting, and finally feeding into a product receiving kettle, and the other part enters a cooler to be cooled, is mixed with diazonium components, namely sulfate and nitrous acid sulfuric acid, and returns to the reaction system through a circulating pump. According to the technical scheme provided by the invention, the intrinsic safety of diazotization reaction is greatly improved, automatic control is adopted in the whole process, different acidity, acid amount and temperature are adopted according to different diazonium components, the stability of diazonium salt is ensured, the reaction speed is ensured to be in a proper range, slurry is homogenized and emulsified by an emulsification pump without layering, and the stability of the diazonium salt is ensured. And meanwhile, the reaction speed is increased, and the purpose of continuous diazotization is achieved.

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.

The invention discloses a preparation method and application of pigment red P.R170 with high covering power, and relates to the technical field of organic pigments, the preparation method comprises the following steps: S1, preparing a diazo component; s2, low-temperature preparation of a coupling component; step S3, coupling reaction; and step S4, pigmentation treatment. According to the preparation method of the high-covering-power pigment red P.R170, a coupling component is prepared under a low-temperature condition by optimizing a process, so that the prepared high-covering-power pigment red P.R170 is high in covering power and tinting strength and excellent in weather resistance, and can be widely applied to the fields of coatings, printing ink, plastics and rubber.

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.

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.