358 results about "Reactive dye" patented technology

The invention relates to the technical field of wastewater recovery, in particular to a recovery device and process for reactive dye dyeing wastewater, and the recovery device comprises a tank body which is internally provided with a filter plate and a cleaning assembly, and the cleaning assembly comprises a cleaning plate; the collecting assembly comprises a collecting box mounted above the cleaning plate; the flushing assembly comprises a plurality of groups of connecting rods, and nozzles are mounted on the plurality of groups of connecting rods; the device has the beneficial effects that reactive dye dyeing wastewater is filtered through the filter plate, when the motor drives the cleaning plate to rotate, the elastically arranged scraping plate can scrape residues attached to the surface of the filter plate, the residues are prevented from blocking filter holes in the filter plate, and when the cleaning plate rotates, the residues scraped by the scraping plate are accumulated in the collecting frame, so that the cleaning effect is good. And under the flowing of the water flow, the water flows into the collecting box through the through groove, so that the residues are collected.

The invention discloses ink with high dye utilization rate for inkjet printing and a preparation method of the ink. The ink is prepared from the following components in percentage by mass: 1.7-3.7% of a cationic auxiliary agent; 3.5%-3.8% of a reactive dye; 22.9% to 28.5% of a viscosity modifier; 0.4%-0.7% of a surfactant; and the balance of deionized water. The method effectively solves the problems of long treatment flow, high consumption of chemicals and energy sources and large discharge amount of colored wastewater caused by low utilization rate of the reactive dye; the dye utilization rate reaches 98.5% or above, and the ink-jet printing ink can be widely applied to ink-jet printing of cellulose fiber fabrics such as cotton, hemp and lyocell; the fabric does not need to be subjected to pretreatment and water washing treatment; and the preparation method is simple, the treatment process is short, the ink stability is good, and the ink can be used in a high-speed printing mode with the injection frequency of 30 KHz.

The invention belongs to the technical field of textile printing and dyeing, relates to an efficient reactive dye ink-jet dyeing process and application, and aims to solve the problems that the traditional dyeing proofing process is tedious, the color difference of front and back surfaces of ink-jet dyeing is large, and the dye utilization rate is low. The process comprises the following steps: firstly, padding a fabric in an aqueous solution until the pick-up rate is controlled to be 60-120%, and carrying out ink-jet printing on reactive dye ink (the viscosity is 3-10 mPa.s and the surface tension is 20-50 mN / m) in a wet fiber swelling state; after printing, a 1%-10% alkali solution is immediately padded to promote permeation of the dye; and then pre-drying at 60-70 DEG C, steaming with saturated steam at 100-102 DEG C for 5-15 minutes, and washing with water to complete color fixation. According to the technology, the K / S ratio of the front face and the back face of the dyed fabric is larger than or equal to 0.95, the color fastness of the dry friction level 4-5 or above, the color fastness of the wet friction level 4-5 and the color fastness of the soaping level 4-5 are achieved, and the technology is suitable for green efficient dyeing of small-batch multi-variety fabric.

The invention discloses a low-temperature one-bath dyeing process for a cotton-polyester blended fabric, which comprises the following steps: soaking the cotton-polyester blended fabric in an aqueous solution of a basic ionic liquid for pretreatment to obtain a pretreated fabric with liquid; mixing the pretreated fabric with the liquid with a reactive dye and a disperse dye, and then carrying out supercritical CO2 fluid dyeing to obtain a dyed fabric; the alkaline ionic liquid contains hydrophobic alkyl and is alkaline, alkaline anions and cellulose hydroxyl form a hydrogen bond network during pretreatment, a cellulose crystalline region is destroyed, and therefore the dye uptake is increased; during dyeing, the alkaline ionic liquid is used as a surfactant to be distributed on an interface of water and CO2 fluid to form a reverse emulsion, so that a microenvironment for the reactive dye to dye cotton fibers is provided; furthermore, alkaline anions of the alkaline ionic liquid can be subjected to exchange reaction with CO2 to generate carbonate, so that the polarity of a microenvironment is enhanced to be alkaline, the reaction activity of the reactive dye and the cotton fibers is improved, and the dye uptake is improved.

The invention belongs to the technical field of textile dyeing, and provides a salt-free alkali-free electrostatic spray dyeing method for cellulosic fibers, which comprises the following steps: uniformly mixing polyethylene oxide, reactive dye and solvent to obtain electrostatic dye liquor; the method comprises the following steps: dissolving a cationic modifier and an alkaline color fixing agent in water to prepare a cationic modified solution, padding a cellulose fiber fabric, and drying to obtain a cationic modified cellulose fiber fabric; and spraying the electrostatic dyeing liquid to the surface of the cationic modified cellulose fiber fabric through electrostatic spraying, and carrying out open-width steaming color fixation and cleaning to obtain the electrostatic spraying dyed cellulose fiber fabric. The electrostatic spraying technology is adopted to replace traditional water bath dyeing, excellent K / S value, dye uptake and color fastness can be achieved without consuming a large amount of salt, alkali and water, water resource consumption and environmental pollution are remarkably reduced, and high-salinity and high-chroma printing and dyeing wastewater is avoided.

The invention discloses a cationic pretreating agent and application thereof in a pad dyeing process of cotton fabrics. The cationic pretreating agent is prepared from the following components in percentage by mass: 1-10wt% of a cationic modifier; 0.1-1 wt% of an alkaline agent; and the balance of ultrapure water. The method comprises the following steps: (1) washing the cotton fabric with ultrapure water, and drying; (2) padding a cationic pretreatment agent; (3) baking at 100 DEG C for 2-6 minutes; (4) dyeing: performing pad dyeing on the pretreated cotton fabric with an active dye; (5) color fixation: directly putting the cotton fabric into a steamer at 100 DEG C for steaming and color fixation for 8-12 minutes without drying the cotton fabric; (6) washing: washing the cotton fabric subjected to color fixation for multiple times; and (7) drying. According to the invention, a limited amount of cationic modifier is utilized, and through the synergistic effect of the cationic modifier and sodium carbonate, the problems of large use amount of salt and alkali auxiliaries, much wastewater, low dye uptake and non-ideal fixation rate in the cotton fabric dyeing process in the prior art are fundamentally solved, and the color performance of the dyed fabric is improved; and the vacancy of a multi-factor interaction mechanism in the prior art is filled.

The invention relates to the technical field of ink-jet printing, and discloses reactive dye ink-jet printing ink based on ionic association regulation and a printing method of the reactive dye ink-jet printing ink. According to the method, on the basis of a cationic compound with the relative molecular weight of 50-1000 in an ink system, the aggregate structure of the anionic surfactant is accurately induced to be controllably converted from a spherical structure to a wormlike or layered structure by virtue of the action of ionic bonds; under the action of not additionally adding a viscosity modifier, the rheological property and dynamic surface tension of reactive dye ink are accurately regulated and controlled, and the dynamic surface tension response rate is remarkably improved, so that the uniformity and stability of the morphology of ink droplets in inkjet printing are improved, the dynamic wetting behavior in the collision process of the ink droplets and a base material is effectively improved, and the printing quality is improved. And high-precision ink-jet printing of the reactive dye ink on the textile fabric is realized.

The application discloses a preparation method of active chitosan quaternary ammonium salt modified cellulose fabric based on a dispersion system, and belongs to the field of textile chemistry. The effective grafting of chitosan quaternary ammonium salt and nitrogen-containing heterocyclic monomers is realized by using a dispersion system, the active sites on the chitosan quaternary ammonium salt are increased, the covalent grafting effect of the active chitosan quaternary ammonium salt and the cellulose fabric is improved, the cellulose fabric is endowed with durable antibacterial function, the dyeing performance of the cellulose fabric in natural dyes and active dyes is improved, and when the cellulose fabric prepared by the method is dyed by using active dyes, the amount of neutral salt can be reduced.

The invention relates to the technical field of dyes, and particularly discloses a pyrimidinyl acid ornamental blue reactive dye as well as a preparation method and application thereof. According to the invention, trichloropyrimidine is introduced into the ornamental blue structure as an active group, and the reactivity of the trichloropyrimidine is lower than that of an active group of a cyanuric chloride structure, so that the pyrimidine acid ornamental blue reactive dye is more stable and not easy to hydrolyze after being combined with cellulosic fibers, the acid-resistant and alkali-resistant stability of a dye-fiber covalent bond is better, and the dyeing performance is more excellent; in addition, water-soluble groups such as a sulfonic acid group and a carboxyl group are introduced, so that the water solubility of the pyrimidinic acid blue reactive dye is improved. Moreover, the pyrimidinyl acid ornamental blue reactive dye prepared by the invention has a good dyeing effect on chemical fibers such as acrylic fibers, spandex and the like and blend fiber fabrics thereof, the adaptability of ornamental blue is further improved, the dye is stable in dyeing, deep in coloring and good in color fixing effect, meanwhile, the acid and alkali resistance of the fabrics is improved, and the pyrimidinyl acid ornamental blue reactive dye has a wide application prospect.

The invention relates to the technical field of non-woven fabric processing, and discloses a non-woven fabric dyeing process which comprises the following steps: step 1, pretreatment; the method comprises the following steps: (1) solution preparation: preparing an aqueous solution containing a surfactant and a penetrant, selecting fatty alcohol-polyoxyethylene ether as the surfactant and controlling the mass concentration at 0.5%-1%, and adopting JFC as the penetrant and controlling the mass concentration at 0.2%-0.5%; and (2) soaking treatment: completely soaking the non-woven fabric into the solution, keeping the soaking temperature at 30-40 DEG C, and setting the soaking time to be 15-25 minutes. According to the dyeing process of the non-woven fabric, a specific surfactant and a penetrating agent are used in the pretreatment step, reactive dye and a proper amount of dyeing assistant are adopted in the dyeing process, dyeing is carried out under the conditions of proper temperature, pH value and time, a cationic color fixing agent is selected in the color fixing step, and the cationic color fixing agent can chemically react with the dye to form stable chemical bonds; therefore, the effects of ensuring uniform dyeing and color brightness of the non-woven fabric and reducing the cost can be achieved.

The invention provides a reactive dye with a high fixation rate and a preparation method thereof. The reactive dye is prepared from the following raw materials in parts by mass: 25 parts of modified reactive dye, 0.3-0.7 part of a metal ion agent and 60-80 parts of water, wherein the modified reactive dye is obtained by inclusion of reactive dye molecules with beta-cyclodextrin-pyridine carboxylic acid, and beta-cyclodextrin and pyridine carboxylic acid in the beta-cyclodextrin-pyridine carboxylic acid are connected through an alkyl chain; metal ions provided by the metal ion agent can be chelated with the picolinic acid. Reactive dye molecules and beta-cyclodextrin-pyridine carboxylic acid form an inclusion structure, the hydrolysis probability of active groups is reduced, and an alkyl chain regulates steric hindrance and molecular spacing, so that pyridine nitrogen and carboxylic acid more efficiently form a more stable chelate with metal ions and further form coordinate bonds with hydroxyl groups on the fiber surface, and the fixation rate of the reactive dye is improved.

The invention relates to the technical field of textile fabrics, and discloses an anti-ultraviolet blended fabric and a weaving method thereof. The fabric is formed by blending 40-60% of anti-ultraviolet polyester fibers, 20-35% of cotton fibers and 15-30% of bamboo fibers, wherein the anti-ultraviolet polyester fibers are prepared by adding nano titanium dioxide and an ultraviolet light absorber into polyester chips and carrying out melt spinning. The UPF value of the fabric is not lower than 50, and combed cotton is adopted as cotton fibers. The weaving method comprises the steps of blending, spinning, plain weaving and after-finishing, the spinning count is 30-60, 2D resin is used for anti-wrinkle finishing, the heat setting temperature is 180-200 DEG C, reactive dye is adopted for dyeing, and the finished product has the properties of ultraviolet resistance, comfort and the like. The anti-ultraviolet fabric has the advantages that the problems that an existing anti-ultraviolet fabric is poor in durability, poor in comprehensive performance and the like are solved, and the anti-ultraviolet fabric is excellent in anti-ultraviolet performance, good in comprehensive performance and environmentally friendly.

The application discloses a low-temperature one-bath dyeing process for polyester-cotton blended fabric, which comprises the following steps: soaking the polyester-cotton blended fabric in an aqueous solution of alkaline ionic liquid for pretreatment to obtain a pretreated fabric with liquid; then mixing the pretreated fabric with liquid with reactive dyes and disperse dyes, and then performing supercritical CO2 fluid dyeing to obtain dyed fabric; the alkaline ionic liquid contains hydrophobic alkyl groups and has alkalinity; during the pretreatment, the alkaline anions form a hydrogen bond network with the hydroxyl groups of cellulose, thereby destroying the crystalline region of cellulose and increasing the dyeing rate; during the dyeing, the alkaline ionic liquid is distributed on the interface between water and CO2 fluid as a surfactant to form an inverse emulsion, thereby providing a microenvironment for the dyeing of cotton fibers by the reactive dyes; in addition, the alkaline anions of the alkaline ionic liquid can exchange with CO2 to generate carbonates, so that the polarity of the microenvironment is enhanced to be alkaline, and the reactivity of the reactive dyes and cotton fibers is improved, thereby improving the dyeing rate.

The present invention relates to a method for detecting the color absorption rate during the process of dyeing with a mixture of reactive dyes. During the process of dyeing with two or more reactive dyes, a dye liquor sample is taken at time t, the pH value is adjusted to neutral and diluted, and then detected by the CE-UV method. The peak area of the substance peak of the target substance in the dye liquor sample is measured, and the concentration of the target substance in the dye liquor corresponding to time t during the dyeing process is obtained through calculation. Furthermore, the color absorption rate of each reactive dye corresponding to time t during the dyeing process is obtained. The target substance is a reactive dye or a hydrolysis product of a reactive dye. The peak position of the target substance is determined by the standard addition method. The formula used for calculation is a linear equation, which is obtained by performing CE-UV detection on target substances with different concentrations to obtain an electrophoresis spectrum, and then performing linear fitting on the peak areas of the target substances in the electrophoresis spectrum and the corresponding concentrations. The method of the present invention is simple and can accurately detect the color absorption rate during the process of dyeing with a mixture of reactive dyes.

The invention discloses a durable flame-retardant dyeing and finishing method for cellulose-based yarns or fabrics, and belongs to the technical field of textile dyeing and finishing. The method comprises the following specific steps: preparing a durable flame-retardant dyeing finishing liquid by using a water-soluble durable flame retardant system and an active dye, carrying out flame-retardant dyeing finishing on the fabric through immersion pressing and high-temperature curing, and combining a flame retardant and dye molecules to cellulose molecules through covalent bonds to obtain the durable flame-retardant dyed cotton fabric. Then, the fabric is subjected to one-step fluoride-free hydrophobic finishing, and the durable, flame-retardant and hydrophobic cotton fabric can be further obtained. The durable flame-retardant hydrophobic dyed fabric disclosed by the invention has excellent flame-retardant property, hydrophobic property, bright color and washing resistance. And after 500 times of water washing, flame retardance, hydrophobicity and color can still be well maintained. Meanwhile, the finishing method disclosed by the invention is mild in condition, cheap and easily available in raw materials, simple and convenient in process and suitable for large-scale industrial application.

The invention relates to the technical field of mulberry silk dyeing, and discloses a mulberry silk dyeing method which comprises the following steps: S1, pretreatment: immersing a mulberry silk raw material into an aqueous solution containing 0.5-1.5% of sodium carbonate, stirring for 20-40 minutes at the speed of 50-100 revolutions per minute at the temperature of 40-60 DEG C, taking out, and rinsing with deionized water until the mulberry silk raw material is neutral; the pretreated mulberry silk is put into a dyeing bath, the dyeing bath comprises 2-5% of reactive dye and 1-3 g / L of leveling agent, the bath ratio is controlled to be 1: 10-1: 20, the temperature is increased to 60-80 DEG C at the speed of 1-2 DEG C / min, and heat preservation dyeing is conducted for 30-60 min. In the pretreatment step, sodium carbonate concentration, temperature and stirring rate are controlled, so that the problem of poor dyeing uniformity caused by residual impurities on the fiber surface and non-uniform dyeing temperature control in the existing mulberry silk dyeing is solved.

The application relates to a preparation method and application of a performance-adjustable reactive cationic polymer, and belongs to the field of textile printing and dyeing. The preparation method of the performance-adjustable reactive cationic polymer comprises the following process steps: mixing an epoxy reactive monomer with concentrated hydrochloric acid, reacting for a certain time under ice bath, and adjusting the pH of the reaction system to be neutral; adding a cationic monomer into the above reaction system, simultaneously adding a phase transfer catalyst or an organic solvent, adding an initiator drop by drop under a nitrogen atmosphere, stirring to carry out a free radical polymerization reaction, naturally cooling after the reaction is completed, and drying to obtain the reactive cationic polymer. According to the application, salt-free high-color-yield dyeing of reactive dyes can be realized when the amount of the cationic polymer is very low.

The invention discloses a preparation method of a multifunctional silk / fungus grass interwoven fabric. The preparation method comprises the following steps: (1) pretreating fibers; (2) weaving the interwoven fabric; (3) dyeing the fabric; (4) after-finishing the fabric; the advantages of the silk fibers and the fungus grass fibers are reserved at the same time, the long-acting antibacterial effect of the silk / fungus grass interwoven fabric is achieved through the antibacterial property of the fungus grass fibers, the fabric has the temperature adjusting function, the fragrance function, the machine washable function and the like at the same time through wet finishing, and the prepared silk / fungus grass interwoven fabric can be used for the fields of clothes, home textiles and the like. According to the method, the cohesive force lifting agent is utilized to conduct pretreatment on the silk fiber and the Juncao fiber before weaving, the equivalence of the cohesive force of the two fibers is guaranteed, the end breaking phenomenon in the weaving process is reduced, and meanwhile the smoothness of the interwoven fabric is guaranteed. The homochromatic coloring of the silk / fungus grass interwoven fabric is realized by utilizing the double-active-group reactive dye through a one-bath method, and the silk / fungus grass interwoven fabric has the advantages of high efficiency, good homochromatic property and the like.

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.

This invention relates to the field of textile printing and dyeing, and discloses a high-colorfastness polyamide 56 fabric and its preparation method. The polyamide 56 fabric contains 70-100% polyamide 56 fiber and 0-30% spandex. The fabric has been dyed at least once, and the dye used for dyeing is a reactive dye. The polyamide 56 fabric dyed with reactive dyes of this invention has the advantages of higher dye uptake, wider pH adaptability, no need for large amounts of calcium salts for dyeing, and minimal or no use of color-fixing crosslinking agents.

This invention provides an antistatic dyeable spandex fiber and its preparation method. During spandex production, N-(2-hydroxyethyl)ethylenediamine is used as a terminating agent for chain extension, combined with the use of the stabilizer TAD, to prepare antistatic dyeable spandex fiber. This improves the dyeing rate and color fastness of spandex fiber to acid dyes and reactive dyes. Furthermore, the heat-resistant dyeable spandex can meet the high-temperature dyeing requirements in the polyester / spandex field. Simultaneously, the improved antistatic properties of the spandex fiber reduce the amount of oiling agents used by spandex manufacturers, thereby lowering production costs. For subsequent processes, it reduces the defect rate in dyeing, finishing, and weaving, saving costs.

The invention discloses an Aspergillus niger detection kit based on SERS (Surface Enhanced Raman Scattering) and a preparation and detection method thereof, the kit comprises an SERS nano-label, the structure of the SERS nano-label takes bionic gold nanoflower as a gold core, and the surface of the gold core is modified with a Raman reactive dye and an Aspergillus niger specific aptamer. The kit has high sensitivity, specificity, reproducibility, uniformity and stability, Raman spectrum can be collected through portable Raman spectrum equipment, the kit can be used for analysis of trace Aspergillus niger in a sample, and the detection limit is lower than 10 CFU / mL. Compared with a traditional bacterial culture method, the method has the advantages in the aspects of simplicity and convenience in operation, detection period, analysis cost and the like. The method is suitable for food safety monitoring.

The invention belongs to the field of reactive dye synthesis, and discloses a preparation process of a reddish brown reactive dye, which comprises the following steps: diazotizing 2-naphthylamine-4, 6, 8-trisulfonic acid, coupling with 1-naphthylamine-7-sulfonic acid to obtain a first-couple material, diazotizing the first-couple material again, coupling with m-toluidine to obtain a second-couple material, refining the second-couple material to obtain a color base, and drying to obtain the reddish brown reactive dye. Carrying out primary condensation on cyanuric chloride and 2, 5-aniline disulfonate to obtain a primary condensation material, carrying out secondary condensation on the primary condensation material and a color base, and filtering the secondary condensation slurry to obtain the reddish brown reactive dye primary stock. The preparation process provided by the invention is stable and low in spray drying energy consumption, and the prepared primary pulp has the advantages of high purity and high solid content, and is excellent in solubility and high in fastness to washing.

The invention discloses a one-paste printing process for dispersing and reactive dye of polyester-cotton fabric. The process flow comprises the following steps: pre-rolling the polyester-cotton fabric with alkali liquor, drying, performing one-paste printing, drying, steaming, drying, baking, washing with cold running water, soaping, washing with warm water, washing with cold water, drying and discharging cloth. The method has the advantages of high fixation rate, short process flow, low wastewater COD (Chemical Oxygen Demand) and the like, and achieves the effects of improving efficiency, saving energy and reducing pollution.

This application relates to the technical field of reactive dyes, specifically to a photochromic red fluorine-containing reactive dye, its preparation method, and its application. The general structural formula of this photochromic red fluorine-containing reactive dye is as follows: [Formula omitted for brevity]. Wherein, R1 and R2 are -H, -SO3M, -CH3, -COOM, -NO2, or -NHCONH; R3 is -Cl or -SO3M; and M is Na, K, or Li. The reactive dye provided in this application exhibits good wash fastness, rubbing fastness, chlorine fastness, and good solubility on cotton fabrics, while also possessing excellent light fastness and superior fixation rate on cotton fabrics during medium-temperature dyeing.

The application discloses an aspergillus niger detection kit based on SERS and a preparation and detection method thereof. The kit comprises a SERS nanolabel, and the structure of the SERS nanolabel is that a bionic gold nanoflower is used as a gold core, and a Raman active dye and aspergillus niger specific aptamer are modified on the surface of the gold core. The kit has high sensitivity, specificity, reproducibility, uniformity and stability, can collect Raman spectrum through a portable Raman spectrum equipment, can be used for analyzing trace aspergillus niger in a sample, and the detection limit is lower than 10 CFU / mL. Compared with a traditional bacterial culture method, the kit has advantages in operation simplicity, detection period and analysis cost. The kit is suitable for food safety monitoring.

The application discloses a dyeing boosting agent and a low-temperature salt-free dyeing method for bio-based PLA / regenerated cellulose fiber blended fabric, and relates to the technical field of textile dyeing. A synergistic cross-linking modification system is constructed by using a bio-based small-molecule phenol with double functional groups and a high-density amino polymer. The fabric is pretreated and immersed for modification, a stable ion cross-linking adhesion layer is formed on the surface of the fiber, and then low-temperature dyeing of the electrolyte-free reactive dye is carried out. The process adopts a one-bath one-step method, does not need high temperature, high salt and reduction cleaning procedures, is simple in process, low in carbon and environmentally friendly, can realize synchronous dyeing and uniform color of PLA and regenerated cellulose fiber, effectively improves the fabric dyeing rate and color fastness, and significantly improves the ultraviolet resistance of the product. The application solves the problems of poor uniformity, low color fastness and large pollution existing in the traditional dyeing process, and is suitable for green and efficient production of bio-based blended fabric.

The application discloses a high-fast orange reactive dye and a preparation method thereof, relates to the field of reactive dyes, and comprises a structure general formula as follows: formula 1: formula 2: or formula 3: wherein R1 is halogen; R2 is -H, -SO3M, -CH3, -COOM or -CHO; and M is Na, K or Li. The application has the effects of improving the fixing effect and dyeing performance of the reactive dye.

The application relates to the dye technology field, and particularly discloses a pyrimidine acid observation blue active dye, a preparation method and application thereof. A trichloropyrimidine is introduced as an active group on the basis of the observation blue structure, the reactivity of the trichloropyrimidine is lower than that of the cyanuric chloride structure, the pyrimidine acid observation blue active dye is more stable after being combined with cellulose fibers, is not easy to hydrolyze, the acid and alkali resistance of a 'dye-fiber' covalent bond is better, and the dyeing performance is more superior; in addition, water-soluble groups such as sulfonic acid groups and carboxyl groups are introduced to improve the water solubility of the pyrimidine acid observation blue active dye. Furthermore, the pyrimidine acid observation blue active dye prepared by the application has good dyeing effects on acrylic fibers, spandex and other chemical fiber fabrics and blended fiber fabrics, further improves the adaptability of the observation blue, the dyeing is stable, the color is deep, the fixation effect is good, meanwhile, the acid and alkali resistance of the fabric is improved, and the application prospect is wide.