279 results about "Ultraviolet absorbance" patented technology

The invention discloses a dosing system for pre-oxidation enhanced coagulation in a water plant and an intelligent regulation and control method, and relates to the technical field of pre-oxidation enhanced coagulation water treatment. The system comprises a raw water pump, a mixing tank, a tubular static mixer, a flocculation tank, a sedimentation tank, an industrial personal computer and multiple online detection instruments which are sequentially connected in series, so as to monitor the flow, conductivity, pH value, temperature, turbidity, ultraviolet absorbance and organic matter concentration of raw water. Key water quality indexes are monitored in real time through data collection and a pre-oxidation enhanced coagulation regulation and control system based on machine learning of an industrial personal computer, and intelligent and accurate prediction of the dosage of oxidants (potassium permanganate, permanganate composite agents and potassium ferrate) and coagulants is achieved; the effluent turbidity, the effluent ultraviolet absorbance and the effluent organic matter concentration of the sedimentation tank are fed back in real time, the adding amount of the oxidizing agent and the coagulant is dynamically adjusted through a regulation and control algorithm, the effluent quality is guaranteed, and medicine consumption is reduced.

The invention discloses a preparation method of flame-retardant silicone rubber resistant to long-term thermal aging, and relates to the technical field of high-molecular compound composition anti-aging rubber. The flame-retardant silicone rubber is prepared from the following components in parts by mass: 75 to 100 parts of methyl vinyl silicone rubber raw rubber, 18 to 28 parts of fumed silica, 20 to 35 parts of aluminum oxide trihydrate, 0.5 to 3 parts of platinum flame-retardant synergist, 2 to 5 parts of heat-resistant additive, 1.5 to 2.5 parts of structured control agent, 1 to 2 parts of cross-linking agent, 2 to 10 parts of anti-aging agent and 8 to 13 parts of fluorinated silicone rubber. Through a synergistic flame-retardant system, the silicone rubber disclosed by the invention shows obvious advantages in flame-retardant capability, can reach a higher flame-retardant grade, effectively delays flame propagation, and reduces the risk of fire disasters. The weather resistance of the silicone rubber is remarkably improved due to the ultraviolet absorption function and the anti-oxidation function of the anti-aging agent, so that the silicone rubber can effectively resist ultraviolet rays and oxidation under the long-term outdoor solarization condition, and the performance reduction and the appearance deterioration are reduced.

An aqueous ultraviolet-absorbing resin emulsion, and an aqueous resin emulsion composition containing the emulsion is provided, wherein the emulsion is excellent in compatibility with a synthetic resin and light resistance. Also, the emulsion improves stability in blending with an aqueous emulsion of the synthetic resin, and prevents bleed out of the ultraviolet-absorbing resin on the surface of a coating film. Further, the aqueous ultraviolet-absorbing resin emulsion imparts excellent alkali or solvent resistance to a synthetic resin poor in alkali or solvent resistance. More specifically, an aqueous resin emulsion composition comprising (I) an aqueous ultraviolet-absorbing resin emulsion and (II) an other aqueous resin emulsion is provided, wherein the emulsion (I) is obtained by urethanizing (A) a polyol component having an ultraviolet-absorbing group {e.g., 1,1-bis[3-(2H-benzotriazol-2-yl)-4-hydroxy-benzeneethanol]methane}, (B) a polyol if necessary, (C) an alkyl or aryl dialkanolamine compound, and (D) an organic polyisocyanate in (E) an organic solvent, diluting the reaction mixture with (F) an organic solvent having a boiling point lower than 100° C. to give a resin solution, neutralizing the resin solution with (G) a neutralizing agent, and dispersing the resultant in water.

The invention specifically discloses a chromatographic grade acetonitrile production process, which comprises the following steps: pretreatment, primary adsorption, azeotropic distillation, secondary adsorption, suspended solid particle sedimentation by alum, and precipitation of a complex through EDTA under the condition of low water content to remove most insoluble and soluble impurities in acetonitrile. Oxidizing small molecular impurities and oxidizing organic impurities with the boiling point lower than or similar to that of acetonitrile, so that the impurities become high-boiling-point substances, and removing the high-boiling-point substances through rectification; the method comprises the following steps: carrying out primary adsorption on acetonitrile to remove an oxidant, carrying out azeotropic distillation to obtain rectified acetonitrile containing a very small amount of water and organic impurities, and carrying out adsorption treatment on the rectified acetonitrile again to obtain high-purity acetonitrile with the content of 99.99% or more, the ultraviolet absorbance at 190nm as low as 0.195, the ultraviolet absorbance at 200nm as low as 0.009 and the ultraviolet absorbance at 254nm as low as 0.002.

The invention relates to the technical field of sewage treatment, in particular to a dynamic control method applied to a culture tail water circulation treatment system. The method comprises the following steps: continuously detecting aquaculture tail water on a water inlet pipeline, calculating the ratio of chemical oxygen demand to five-day biochemical oxygen demand as a first degradation index, and calculating the ratio of ultraviolet absorbance to total organic carbon concentration as a second degradation index; according to the first degradation index and the second degradation index, identifying aging complementary and range complementary organic load degradation characteristics, and determining a process treatment path based on the organic load degradation characteristics; performing primary pretreatment on the aquaculture tail water in different process treatment paths to obtain intermediate water quality data; detecting the ammonia nitrogen concentration of the intermediate water quality data, and extracting the time change rate of the ammonia nitrogen concentration as an ammonia nitrogen conversion parameter. According to the invention, the oxygen utilization efficiency and the removal rate of organic matters and nitrogen are improved through regional dissolved oxygen and function configuration optimization.

The invention discloses a fluorescent colorimetric sensor for detecting circulating tumor cells and a preparation method of the fluorescent colorimetric sensor. The preparation method comprises the following steps: S4, adding a prepared detection antibody modified with horse radish peroxidase and used for detecting the circulating tumor cells, and incubating; s5, adding a Tris buffer solution and a H2O2 solution, and incubating; s6, preparing an EuMOF nanoflower solution; and S7, adding the EuMOF nanoflower solution and 3, 3 ', 5, 5'-tetramethyl benzidine to react, detecting the fluorescence intensity in the presence of circulating tumor cells with different concentrations by using a luminoscope, detecting the ultraviolet absorbance value in the presence of circulating tumor cells with different concentrations by using a multifunctional microplate reader, and constructing a fluorescence intensity-concentration working curve and an ultraviolet absorbance value-concentration working curve. The method is used for qualitative and quantitative analysis and detection of the circulating tumor cells, realizes bimodal signal response to the circulating tumor cells, and has high sensitivity and simplicity and convenience in operation.

The invention provides an environment-friendly formaldehyde-free negative oxygen ion automobile glass film and a manufacturing method thereof, and belongs to the field of glass films. The finishing paint is prepared from the following raw materials: mixed resin emulsion, rare earth nano cerium oxide, metal nano oxide, glass fiber powder, vitrified micro-beads, nano negative ion powder, a dispersing agent, an ultraviolet light absorber, a wetting agent, a thickening agent, a defoaming agent, a surfactant, a mildew preventive and a flatting agent. The environment-friendly formaldehyde-free negative oxygen ion automobile glass film is prepared through the prepared mixed resin emulsion, under the specific raw material ratio, the ultraviolet absorption rate and the heat insulation effect of the automobile glass film can be effectively improved, the negative oxygen ion release amount of the automobile glass film can be increased, formaldehyde-free and environment-friendly effects of the automobile glass film are achieved, and the service life of the automobile glass film is prolonged. The automobile glass film also has better weather resistance and mechanical strength, and has a wide application prospect when being used on automobile glass.

The invention belongs to the technical field of preparation and surface protection of polyurethane coatings, and particularly relates to weather-resistant polyurethane and a preparation method thereof. The coating provided by the invention is composed of a component A and a component B according to a weight ratio of 1: (0.2-0.4). The component A is prepared from water-based fluorine-containing hydroxy acrylic dispersion resin with a high hydroxyl value, GMA (glycidyl methacrylate) grafted modified water-based acrylic dispersion resin, a benzotriazole ultraviolet light absorber, a light hindered amine stabilizer, rutile titanium dioxide, wet sericite powder, nano zinc oxide and auxiliaries; and the component B comprises an aliphatic isocyanate curing agent and propylene glycol diacetate. By constructing a quadruple synergistic weather-resistant mechanism of ultraviolet absorption, free radical capture, physical shielding and structural densification, the weather resistance and corrosion resistance of the coating are remarkably improved while the coating keeps excellent adhesive force (0-1 level) and hardness (2H-3H), the color change delta E is smaller than or equal to 1.8 after artificial accelerated aging for 1000 hours, the gloss loss rate is smaller than or equal to 23%, and the weather resistance and corrosion resistance of the coating are greatly improved. And the corrosion spreading width of a 600-hour salt spray test lineation is less than or equal to 2.3 mm.

The invention provides a soft hydrophilic contact lens material, a soft hydrophilic contact lens as well as a preparation method and application of the soft hydrophilic contact lens. The soft hydrophilic contact lens material comprises the following components in percentage by weight: 70%-99% of a hydrophilic monomer, 0.1%-10% of an antioxidant monomer, 0.05%-6% of a cross-linking agent, 0.005%-5% of an initiator and 0.5%-15% of a diluent. According to the invention, the hydrophilic monomer and the antioxidant monomer are used, so that the material has high softness, the wearing comfort is improved, and the antioxidant monomer improves the oxidation resistance of the soft hydrophilic contact lens material and reduces free radicals in the wearing process of the contact lens, thereby reducing the possibility of inflammatory response and the possibility of dry eyes of the contact lens. Meanwhile, the antioxidant monomer has an ultraviolet absorption function and can bring a cell ultraviolet protection effect, and the hydrophilic monomer and the antioxidant monomer both have good biological safety, so that the safety of the material is improved.

The invention relates to a biaxially oriented casting polypropylene composite film and a preparation method thereof, and belongs to the technical field of packaging materials. The homo-polypropylene, the co-polypropylene, the slipping agent, the nucleating agent, the antioxidant and the modified nano silicon dioxide are used as raw materials to prepare the biaxially oriented casting polypropylene composite film which can be used in the field of food packaging and has high transparency and good antistatic performance and ultraviolet resistance. The nano silicon dioxide is modified, and the ultraviolet light absorber is grafted on the surface of the nano silicon dioxide, so that the problem that the nano silicon dioxide is easy to agglomerate is solved, and the problem that the ultraviolet light absorber is easy to migrate is also solved; through quaternary ammonium salt structure conjugation, the ultraviolet light absorber has better ultraviolet light absorption performance and antistatic performance.

The invention discloses an anti-ultraviolet automobile film and a preparation method thereof, and belongs to the technical field of automobile films. The invention relates to a high-temperature-resistant coating which comprises the following components in parts by weight: 80-100 parts of polyethylene glycol terephthalate, 3-5 parts of polyimide, 5-8 parts of a plasticizer, 2-3 parts of a defoaming agent, 1-2 parts of a flatting agent and 20-30 parts of TiO2 / PDA / ZnO (at) MOF. TiO2 is wrapped by polydopamine, agglomeration of TiO2 is prevented, meanwhile, ZnO is wrapped on the outer layer more uniformly due to the adsorption effect on ZnO, and polydopamine also has the antibacterial and light absorption effects; the combination of TiO2 and ZnO can effectively improve the breadth and depth of ultraviolet protection. The prepared automobile film has high transmittance and ultraviolet absorptivity, and a pencil hardness test table has good mechanical properties and good antibacterial rate.

Provided are a novel ultraviolet absorber that has an excellent absorbing property for UV-A or UV-B, furthermore specifically absorbs only ultraviolet ray at a specific wavelength, and is capable of being used for general purposes, and an ultraviolet absorbing resin excellent in bleed-out resistance in addition to the characteristics described above. The ultraviolet absorber is a fluorene compound represented by the general formula (1) or a resin comprising the fluorene compound as a constituent unit.

The present disclosure relates to compositions including a light absorbing system including bemotrizinol and iron oxide, as well as to methods of making and using such compositions.

An ultraviolet protective textile and a method of making an ultraviolet protective textile comprising a sheet-like substrate comprising a synthetic, semi-synthetic or natural textile or a blend thereof, an ultraviolet absorbing chemical present on the substrate, and an end-capping agent bound to the ultraviolet absorbing chemical. The ultraviolet absorbing chemical may be an organic acid, protein, flavonoid or polyphenol compound, such as tannic acid. The capping agent may be an alkylbenzene-based surfactant, a phenylethanoid glycoside, a monophenol, or a protein, such as whey or casein.

The invention relates to the technical field of water treatment, and discloses a central air-conditioning condensate water disinfection and purification device which comprises a treatment tank main body, an ozone generator and an ozone generator real-time regulation and control system. According to the system, a demand coefficient is dynamically obtained based on residual ozone concentration and ultraviolet absorbance through a pollution load evaluation module; the ozone mass transfer efficiency evaluation module calculates a mass transfer efficiency coefficient based on the tail gas and inlet gas ozone concentration and the gas flow; the matching evaluation module combines the demand coefficient, the mass transfer efficiency coefficient and the water temperature influence factor to generate a matching factor; the generator health monitoring module evaluates a health degree coefficient based on parameters such as air inlet pressure; and the power comprehensive decision-making module fuses the health degree coefficient and the matching factor, and outputs a target power set value through a multi-parameter regulation and control model. The intelligent sensing and dynamic optimization of ozone feeding are realized, the problems of traditional control stiffness, low mass transfer efficiency and insufficient equipment guarantee are solved, and the energy utilization rate and the operation reliability are improved while the disinfection effect is ensured.

To provide a polarizing film with an adhesive layer, which can solve a problem of decrease in a yield, can impart a sufficient function of blocking UV rays even when a polarizing film is thin, and can suppress curling, and to provide an image display device using the polarizing film with an adhesive layer.SOLUTION: A polarizing film 1 with an adhesive layer is to be used on a visible side of an image display part in an image display device; and the polarizing film 1 with an adhesive layer includes a polarizing film 5 and adhesive layers 2a, 2b on both surfaces of the polarizing film 5. The polarizing film 5 includes a polarizer 4 and transparent protective films 3a, 3b on both surfaces of the polarizer. The transparent protective film 3a on a visible side of the polarizer 4 has a transmittance of less than 6% at a wavelength of 380 nm; and the adhesive layer 2a on a visible side of the polarizing film 5 has an ultraviolet absorption function.SELECTED DRAWING: Figure 1

The invention discloses alcohol-resistant aging-resistant waterborne polyurethane and a preparation method thereof.The alcohol-resistant aging-resistant waterborne polyurethane is of a unique core-shell structure, a core layer is fluorine-containing polyurethane and is prepared through a reaction of fluorine-containing polyol, polyisocyanate and the like, the molar ratio of the fluorine-containing polyol to the polyisocyanate is 1: 2-1: 4, and a double-bond-containing chain extender is introduced; the shell layer is an acrylate copolymer containing an ultraviolet absorption monomer, the ultraviolet absorption monomer accounts for 10-40%, the shell layer further contains a multifunctional cross-linking agent, the shell layer is formed by compounding at least two acrylate monomers with different polarities, the core and the shell are connected through chemical bonds, and bonding is enhanced through a silane coupling agent KH-570. The preparation process comprises the steps of fluorine-containing polyurethane core layer preparation, neutralization and pre-dispersion, shell layer polymerization, post-treatment and the like. The prepared waterborne polyurethane has greatly improved alcohol wiping resistance and excellent xenon lamp aging resistance, and can be widely applied to the fields of automotive interiors, consumer electronics coatings and the like.

The present application relates to thermal insulation coating technical field, specifically to a kind of low VOCs ultraviolet resistant thermal insulation coating composition and its performance testing device, consisting of the following mass parts components: water-based acrylic resin 30-45 parts, nitrogen-doped graphene 1-3 parts, nano composite powder 2-5 parts, low water absorption and expansion glass microsphere 8-12 parts, silane coupling agent modified sepiolite 5-10 parts, silane coupling agent KH560 0.5-1.5 parts, ultraviolet absorber UV-9 0.3-0.8 parts, hydroxyethyl cellulose thickening agent 0.2-0.5 parts;Composition meets the following conditions: (1) VOCs content≤50g / L;(2) ultraviolet absorption rate≥95%;The present application realizes the purpose that VOCs content is far lower than traditional solvent type coating through the synergistic effect of water-based acrylic resin system and low water absorption and expansion glass microsphere, while nitrogen-doped graphene and nano ITO-SiO2 Composite powder form ultraviolet-infrared dual-effect shielding layer, ultraviolet absorption rate, infrared reflectivity greatly improve, solve the problem that traditional anti-UV coating function is single, VOCs is overproof.

Provided is a primer composition that contains: (A) a copolymer (A-1) which contains a constituent unit represented by the formula shown below and which does not contain a prescribed ultraviolet radiation-absorbing group (R1 denotes a hydrogen atom or the like, R2 denotes a monovalent hydrocarbon group or the like, R4 denotes a hydrogen atom or the like, R5 and R6 each denote an alkyl group or the like, X2 denotes an alkyleneoxycarbonyl group or the like, n denotes an integer between 1 and 3, and * denotes a bond to an adjacent constituent unit); a vinyl-based (co)polymer (A-2) which does not contain an alkoxysilyl, does not contain a prescribed ultraviolet radiation-absorbing group, and has a glass transition point of 80°C or higher; an ultraviolet radiation absorber (B); a compound (C) having a cyclic hindered amine structure; inorganic particles (D) having a median diameter of 100 nm or less; and a solvent (E). The (A-1) : (A-2) mass ratio is 3:1 to 1:3.

The present invention addresses the problem of providing an optical film having excellent ultraviolet absorbency, excellent alignment properties of a liquid crystal compound in an optically anisotropic layer, and excellent adhesion between an alignment film and the optically anisotropic layer. The optical film according to the present invention comprises an alignment film and an optically anisotropic layer disposed adjacent to the alignment film, the optically anisotropic layer being formed using a composition containing a liquid crystal compound, and the alignment film containing particles containing an ultraviolet absorber and a cured product of a polymerizable compound having a polymerizable group, the average particle diameter of the particles is 500 nm or less, and the maximum absorption wavelength of the ultraviolet absorber is within the range of 320-400 nm.

The invention discloses a yellowing-resistant and aging-resistant polyurethane resin coating material and a preparation method thereof, and belongs to the technical field of polyurethane resin coating materials, and comprises the following raw materials by weight: 80-100 parts of polyether polyols, 60-80 parts of diisocyanates, 50-70 parts of butyl acetate, 5-8 parts of modified titanium dioxide, 1-2 parts of defoamers, 12-18 parts of chain extenders, 0.2-0.4 parts of ultraviolet light absorbers, and 0.1-0.2 parts of stannous octoate. The coating material is mainly made of polyether polyether and aliphatic diisocyanates, and the aliphatic diisocyanates do not contain benzene rings, thereby improving the yellowing resistance of the polyurethane resin coating material, and adding ultraviolet light absorbers and modified titanium dioxide at the same time, titanium dioxide has extremely strong ultraviolet absorption and infrared reflection characteristics, and the ultraviolet light absorber can release ultraviolet radiation in the form of heat, and the two act synergistically, and can significantly improve the anti-ultraviolet ability of the polyurethane resin coating material, thereby effectively improving the yellowing resistance and aging resistance of the polyurethane material.

The invention discloses a dosing system for removing algae through pre-chlorination enhanced coagulation and a refined intelligent regulation and control method, and belongs to the technical field of water treatment. The system comprises a raw water pump, a tubular static mixer, a flocculation basin, a sedimentation basin, an industrial personal computer and multiple online detectors, and is used for monitoring flow, temperature, turbidity, characteristic fluorescence peak intensity, ultraviolet absorbance and organic matter concentration. On the basis of integrated real-time sensing data, by monitoring the characteristic fluorescence intensity ratio of algae cells after pre-chlorination and before flocculation, the dosage of an oxidizing agent (available chlorine) and a coagulant is finely and intelligently regulated and controlled on the premise of ensuring the integrity of the algae cells and enhancing coagulation. Under different water quality conditions, the system shows good self-adaptive capacity, accurate adding of an oxidizing agent (available chlorine) and a coagulant is achieved by applying a dynamic adjustment algorithm, the effluent quality is guaranteed, and the medicine consumption is reduced.

A food processing apparatus includes: a container that includes a space for accommodating a food item; a catalyst film that includes an activation surface in contact with the space; and a light source that is disposed closer to a principal surface of the catalyst film than to the activation surface in a thickness direction of the catalyst film, and emits ultraviolet light toward the catalyst film. The principal surface is on an opposite side of the catalyst film with respect to the activation surface. The catalyst film includes a surface layer including the activation surface and an absorption layer including the principal surface. The absorption layer contains an ultraviolet-light absorbing particle that absorbs a portion of the ultraviolet light.

The present invention refers to a process for producing white UV-absorbing surface-reacted calcium carbonate doped with a titanium species, comprising the steps of providing a calcium carbonate-comprising material, a calcium phosphate selected from monocalcium phosphate and / or dicalcium phosphate, and at least one titanium comprising substance, treating the calcium carbonate-comprising material with the calcium phosphate in an aqueous medium to form an aqueous suspension and grinding the aqueous suspension at a pH value of at least 4.2 to form an aqueous suspension of surface-reacted calcium carbonate, wherein the calcium carbonate-comprising material and the calcium phosphate in combination have a calcium ion to phosphate ion molar ratio (Ca2+:PO43−) in the range from 1.75:1 to 100:1, and wherein the at least one titanium comprising substance is added before and / or during and / or after the treatment step and / or before and / or during the grinding step.

The application discloses a kind of ultraviolet absorber with triazine ring as main structure and its preparation method and its application in aramid fiber, the ultraviolet absorber has the following structural formula: Wherein, R1, R2, R3, R4 It is the group containing phenyl or substituted phenyl, R5 It is piperidyl, piperazyl, pyrrolidinyl and one of the following structures:This ultraviolet absorber has good absorption to UVA-UVB band ultraviolet, especially in 290~320 nm range has good ultraviolet absorption, adding the ultraviolet absorber in aramid fiber can significantly improve its weather resistance and service life, keep mechanical property, delay ultraviolet degradation, reduce the direct damage of fiber.

A component processing method is provided that can prevent damage to the workpiece (component, etc.) even when a rigid substrate is peeled off from the workpiece. The component processing method of the present invention includes: a lamination step in which a rigid substrate, an ultraviolet absorbing layer, and a workpiece are sequentially laminated; a processing step in which the workpiece is processed; and a peeling step in which the ultraviolet absorbing layer is irradiated with ultraviolet light to peel the rigid substrate off from the workpiece.

This invention discloses a composite transparent film and its preparation method, relating to the technical field of polymer materials. The preparation method of the composite transparent film includes the following steps: (1) melting and blending vermiculite and fluororubber to obtain fluorinated vermiculite; then mixing the fluorinated vermiculite and mica evenly to obtain composite clay; (2) mixing polyvinyl alcohol solution, composite clay, and SESC lignin evenly to obtain a precursor solution, wherein the mass ratio of polyvinyl alcohol, composite clay, and SESC lignin is 45:45:(8-12); then spreading and drying the precursor solution on a substrate by casting, followed by heat treatment to obtain the composite transparent film. The composite transparent film of this invention possesses excellent water vapor barrier properties, ultraviolet absorption capacity, good transparency, high mechanical strength, and weather resistance.

The application relates to the technical field of ultraviolet absorbing materials, and discloses a preparation method of a composite ultraviolet absorbing agent, which comprises the following components in percentage by weight: 50-70% of an ultraviolet absorbing agent, 10-20% of a light stabilizer, 5-15% of an antioxidant, 2-5% of a dynamic crosslinking agent, and 0.5-2% of an auxiliary additive. The preparation method comprises the following steps: dissolving the ultraviolet absorbing agent, the light stabilizer and the antioxidant in a mixed solvent to stir and form a uniform solution, adding the dynamic crosslinking agent to perform crosslinking reaction, then removing the solvent by vacuum evaporation, and grinding and drying to obtain the target product. The composite ultraviolet absorbing agent is prepared through the synergistic effect of the components and the construction of a dynamic crosslinking network, the ultraviolet absorbing performance, the chemical stability, the thermal stability and the low migration property are remarkably improved, and the composite ultraviolet absorbing agent can be widely applied in the fields of plastics, coatings, textiles and the like.

The invention relates to a preparation method of a high-performance ink material for a writing pen, and belongs to the technical field of ink materials. The high-performance ink material for the writing pen is obtained by self-making the modifier and blending the modifier with the pigment and other auxiliaries, and the modifier connects the benzotriazole with the hydroxypyridine, so that a conjugated system is expanded, the ultraviolet absorption strength of the modifier is higher, the efficiency is higher, and the ink material is more suitable for the writing pen. Ether introduced by pyridine can be used as a hydrogen bond acceptor to form a hydrogen bond with resin in an ink system, so that the ultraviolet light absorber is prevented from being separated out; quaternary ammonium salt cations in the modifier can improve the adhesive force and color fastness of the ink and the friction resistance and water resistance after writing; meanwhile, tert-butyl in the modifier reduces surface tension through steric hindrance, promotes leveling of ink and ink mark uniformity and enhances dispersion stability among resin, auxiliaries and pigment, so that the ink is not prone to layering and deterioration after being placed for a long time.