15results about "Monoazo dyes" patented technology

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 high-temperature disperse dyes, and belongs to the technical field of disperse dyes. The method comprises the following steps: preparing a coupling liquid with buffering capacity and preparing a diazonium salt solution with automatic control of pH, mixing the two, and allowing the reaction to proceed naturally in a suitable pH range by the buffering action of the coupling liquid without additional adjustment, and finally obtaining disperse red 167 dyes through post-treatment. The application adopts a synergistic process of buffer type coupling liquid preparation and stabilized diazonium salt solution preparation, and combines automatic control system to monitor and dynamically adjust the pH value in the reaction process in real time, so that the coupling and diazotization reactions are ensured to proceed in a precise and stable pH environment, the occurrence of side reactions is effectively avoided, and the reaction efficiency and product purity are improved.

To provide a coloring agent including a methylated diketo-pyrrolo-pyrrole pigment, having an excellent spectral characteristic, a high contrast ratio, a viscosity stability, and a solvent resistance, and causes less generation of foreign materials due to defective dispersion and less generation of foreign material due to a heating process.SOLUTION: The present invention relates to a coloring agent containing a methylated diketo-pyrrolo-pyrrole pigment expressed by a chemical formula (1). The X-ray diffraction pattern of a CuKα-ray has its peak when the Bragg angle 2θ is 2θ(±0.3)=15.7° and 27.0°. The coloring agent has a crystal type in which the intensity ratio (H2 / H1) when the diffraction intensity of 15.7° is denoted by H1 and the diffraction intensity of 27.0° is denoted by H2 is in the range of 1.5 to 2.6, both inclusive.SELECTED DRAWING: None

The present invention relates to the field of isomer mixtures of reactive dyes suitable for dyeing or printing nitrogen-containing or hydroxyl-containing fibre materials, the dyeings or prints produced thereon having good build-up properties, high fixation, good wash-off of unfixed dye and good all-round fastnesses, as well as good stability to various dyeing parameters, such as good bath stability. Furthermore, the present invention relates to a process for dyeing or printing nitrogen-containing or hydroxyl-containing fibre materials, wherein an isomer mixture of reactive dyes according to the present invention is used. The isomer mixtures according to the invention comprise at least an isomer of formula (la) and an isomer of formula (lb).

A device for producing an azo compound includes a reaction unit in which a first solution comprising a hydrazo compound and at least one type of MaXb; a negative electrode disposed to be in direct contact with the hydrazo compound inside the reaction unit; and a positive electrode disposed inside the reaction unit so as to be in contact with the solution. X is a halogen element, M is at least one selected from the group consisting of hydrogen, Li, Na, K, Mg, Ca, Mn, Fe, Ni, Cu, Ag, Zn, Sn, Zr, and Ti, or at least one selected from the group consisting of a primary ammonium ion, a secondary ammonium ion, and a tertiary ammonium ion, H is hydrogen, and a and b are each independently any one integer between 1 and 4.

This invention relates to a heterocyclic azo disperse dye for improving the dyeing rate of meta-aramid fibers and its dyeing method, belonging to the field of textile technology. The invention provides a series of heterocyclic azo disperse dyes based on pyrazolamine and pyrazolone parent structures, synthesized via diazotization-coupling reactions. The dye molecules possess optimized size and planarity, effectively promoting their diffusion and penetration within the fiber. By introducing substituents such as -Cl and -CH3 to regulate the molecular structure, the matching between the dye and the pre-swollen fiber structure is further enhanced, thereby improving the diffusion path and dyeing uniformity. Furthermore, this invention systematically studies the effects of different organic solvent pretreatments on the dyeing performance of meta-aramid fibers, determines the optimal pretreatment solvent, and optimizes the pretreatment conditions and dyeing process parameters accordingly.

The application relates to the technical field of organic dye synthesis, and discloses a light-resistant functional dye synthesis process containing fluorine groups, which comprises the following steps: preparing a fluorine-containing diazonium salt oil phase fluid; constructing a water-in-oil dispersion system containing coupling components and non-ionic surfactants; utilizing the chemical potential change in the reaction process to drive the directional migration of the surfactants to the oil-water interface to perform a coupling reaction; and leading out the reaction heat for driving the azeotropic gasification recovery of the solvent. Through the establishment of an interface mass transfer compensation mechanism based on ion intensity attenuation, the application effectively solves the proton blocking effect of the micro interface, realizes the energy cascade utilization of the reaction heat and the solvent recovery process, and improves the reaction conversion rate of the fluorine-containing dye and the process energy utilization efficiency.

This invention provides a method for preparing an environmentally friendly orange disperse dye and the environmentally friendly orange disperse dye prepared using this method. The method for preparing the environmentally friendly orange disperse dye includes the following steps: Step 1): In the presence of an oxidizing agent, o-chloro-p-nitroaniline is subjected to a bromination reaction with bromine to obtain a brominated product; Step 2): The brominated product is subjected to a diazotization reaction with a diazo component to obtain a diazo product; Step 3): The diazo product is coupled with N-cyanoethyl-N-acetoxyethylaniline to obtain the environmentally friendly orange disperse dye. The environmentally friendly orange disperse dye prepared by this invention has high purity and yield. More importantly, no chlorinated organic compounds such as chlorobenzene, chlorotoluene, and chlorophenol are detected in the environmentally friendly orange disperse dye prepared by the method of this invention, thus meeting environmental protection requirements.

The present invention relates to the use of anthranilic acid in a process for preparing a compound selected from copper phthalocyanine, quinacridone, 2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide (PY74), and 2-({2-oxo-1-[(2-oxo-2,3-dihydro-1H-benzimidazole-5-yl)carbamoyl]propyl}diazenyl)benzoic acid (PY151). In particular, the anthranilic acid is produced or obtained from a microorganism.

To provide a coloring composition improved in heat resistance and solubility in an organic solvent and excellent in color tone properties, and a color filter colorant.SOLUTION: The invention provides a compound represented by a formula (1), in the formula (1), each Q is independently a group represented by a formula (2); and n is an integer from 2 to 10.SELECTED DRAWING: None

The present application belongs to the field of fine chemical industry and the field of textile printing and dyeing, and particularly relates to a kind of carbene dyes containing double isoreaction groups and a synthesis method and dyeing application thereof. A new type of carbene dye with double isoreaction groups is designed and developed by simultaneously introducing phenyl trifluoromethyl bisaziridine structure and 2-diazopropandioic acid diester structure into the structure of the dye. The application also simultaneously provides the application of the above-mentioned carbene dye containing double isoreaction groups in polyester fabric dyeing. The present application combines the chemical reaction process of the dye with the dyeing process, saves the operation steps and operation time, saves the energy consumption, and reduces the production cost.

This invention discloses a cationic dye and its preparation method, belonging to the field of dye technology and patent classification number C09B26 / 04. The method uses 2-amino-4-nitrophenol as a starting material, which undergoes diazotization and coupling with N-ethyl-N-(2-hydroxyethyl)aniline to obtain an azo precursor containing dihydroxyl groups. Subsequently, this precursor undergoes etherification, silanization, and quaternization reactions sequentially with epichlorohydrin, γ-aminopropyltriethoxysilane, and diethyl 2-bromoethylphosphonate to generate a dye intermediate containing siloxane and quaternary ammonium salt groups. Finally, by adding tetraethyl orthosilicate and tributyl borate, a sol-gel reaction is carried out under acidic conditions to form a nano-borosilicate coated structure. After precipitation, washing, and drying, the final product is obtained. The cationic dye prepared by this invention exhibits good alkali resistance.

A visible light-absorbing azo compound having the structure of Formula (I), wherein X1, X2, X3, Y, and Z are as defined herein, and ophthalmic devices formed therefrom. (I)