226 results about "Ether solvent" patented technology

A method for producing an aromatic heterocycle-substituted difluoroacetic acid derivative having a partial structure represented by the formula (III), by reacting an N-oxido aromatic heterocyclic compound having a partial structure represented by the formula (I) with tetrafluoroethylene in the presence of a compound represented by the formula (II): R—YH, in a solvent selected from an aromatic hydrocarbon solvent, an ester solvent and an ether solvent:

The present application discloses a battery cell and a preparation method therefor, a battery, and an electric device. The battery cell comprises a positive electrode sheet, a negative electrode sheet, and an electrolyte. The electrolyte comprises a first non-aqueous electrolyte solution close to the positive electrode sheet and a second gel electrolyte close to the negative electrode sheet. The first non-aqueous electrolyte solution comprises a first solvent and a first lithium salt, and the first solvent comprises a nitrile-based solvent. The second gel electrolyte comprises a polymer layer and a second non-aqueous electrolyte solution accommodated in the polymer layer. The second non-aqueous electrolyte solution comprises a second solvent and a second lithium salt, and the second solvent comprises a linear monoether solvent. The battery cell has long cycle life and good rate performance.

The invention belongs to the field of solid-state batteries, and particularly relates to a lithium metal battery, a high-voltage wide-temperature-range gel polymer electrolyte of the lithium metal battery, a preparation method of the high-voltage wide-temperature-range gel polymer electrolyte and application of the high-voltage wide-temperature-range gel polymer electrolyte. The high-voltage wide-temperature-range gel polymer electrolyte is prepared; the composite monomer comprises a monomer 1 and a monomer 2 in a weight ratio of (1-2): (1-2), the monomer 1 comprises a compound as shown in a formula 1 (1), and the monomer 2 comprises a compound as shown in a formula 2 (2); the basic electrolyte comprises a conductive lithium salt and an ester ether solvent, and the conductive lithium salt comprises LiPF6; the ester-ether solvent comprises an ester solvent, a fluorinated ester solvent and hydrofluoroether in a weight ratio of (4-5): (2-3): (2-3). The electrolyte disclosed by the invention can meet the application requirements of high pressure and wide temperature range, and the high-pressure, low-temperature and high-temperature cycling stability of the electrolyte is improved.

The invention belongs to the technical field of new energy materials, and particularly relates to a solid electrolyte material for a lithium battery and a preparation method thereof. The solid electrolyte material for the lithium battery is a polyurethane elastomer and consists of a polyether ion conduction soft segment and an isocyanate crosslinking hard segment, the soft segment is selected from polyether polyol and accounts for 66-90% of the total mass of the polyurethane elastomer; the hard segment is formed by reacting diisocyanate with a chain extender, and accounts for 10-34% of the total mass of the polyurethane elastomer; and the ether solvent is sealed in the soft segment phase by the polymer network. The polyurethane elastomer disclosed by the invention has high ionic conductivity, excellent mechanical property and good interface compatibility, and can be suitable for different types of lithium batteries, such as lithium ion batteries, lithium metal batteries, high-voltage lithium ion batteries and the like; and the preparation process is simple and suitable for large-scale industrial production.

The application discloses an EBR solvent and a rectification preparation process thereof, and belongs to the technical field of semiconductor material processing; wherein the EBR solvent comprises the following components in percentage: 95-98% of propylene glycol methyl ether acetate and 2-5% of propylene glyyl methyl ether. The EBR solvent is prepared by rectification recovery of waste liquid generated in a dilution cleaning process, and the main steps are as follows: S1, sedimentation filtration: filtering solid impurities in the waste liquid; S2, preliminary water removal: removing part of water in the filtered waste liquid through a common distillation tank to obtain primary waste liquid raw material; S3, feeding: introducing the primary waste liquid raw material into a rectification tower for intermittent distillation purification; S4, water removal: removing water in the primary waste liquid raw material by using an extractant; S5, extractant reflux; S6, extractant extraction: after the water is removed, the extractant is extracted; and S7, EBR solvent extraction. The application solves the problem that the purity of the effective component EBR solvent in the photoresist cleaning waste liquid is not high, and the recycling effect is poor.

The application discloses a kind of for multi-substrate coating fast-curable water-based acrylic modified epoxy resin emulsion and its preparation method, first by itaconic acid, alcohol ether solvent and bisphenol A type epoxy resin synthesis epoxy adduct intermediate product, then with other acrylic monomer free radical polymerization is formed acrylic modified epoxy resin with this intermediate product, finally using additional epoxy emulsifier by phase inversion method is made water-based acrylic modified epoxy resin emulsion.The emulsion prepared in the application has higher glass transition temperature, has faster surface dry and curing speed, can satisfy the fast curing of coating film on various substrate workpieces, workpiece offline stacking resistance requirements;Side chain contains a certain amount of carboxyl and hydroxyl, can give coating excellent adhesion, realize good adhesion on various substrates;Resin structure contains a certain amount of bisphenol A type epoxy resin, and epoxy-amine curing agent is well compatible after curing, and coating is uniform.

The application discloses an adsorbent for removing trace metal ions in alcohol ether solvents and a preparation method and application thereof, and belongs to the field of chemical separation technology. The adsorbent is a zirconium-based metal organic cage material with discrete structure formed by coordination self-assembly of a zirconium metal salt and a nitrogen-containing polycarboxylic acid organic ligand. The adsorbent has specific ion nanowells, and can form a strong limited synergistic effect with metal ions. The adsorbent is suitable for adsorption and separation of trace metal ions in various alcohol ether solvents, and has high metal ion adsorption and removal efficiency.

This invention discloses a method for preparing polyethylene cyclohexanedicarboxylate (PECCHD) from waste PET. Specifically, it relates to a solvent composition for dissolving PET, characterized in that the solvent composition comprises a first solvent and a second solvent; the first solvent is a haloalcohol solvent or a cyclic ether solvent; the second solvent is one or more of a cyclic ether solvent, a chain ether solvent, a nitrile solvent, a ketone solvent, or a haloalkane solvent; the chain ether solvent is a chain ether solvent with 2-4 oxygen atoms; the volume ratio of the first solvent to the second solvent is 1:(1-5); the first solvent and the second solvent are not the same solvent. This method has significant advantages in terms of raw material adaptability, reaction efficiency, and industrialization potential, achieving a highly efficient conversion from low-end waste PET to high-value-added PECHD.

The invention discloses a liquid-phase indirect preparation method of high-purity lithium sulfide, and belongs to the field of fine chemical engineering. The preparation method comprises the following steps: firstly, enabling metal lithium to react with high-purity naphthalene at low temperature in an ether solvent in an anhydrous oxygen-free argon atmosphere to generate naphthyl lithium; then introducing high-purity hydrogen sulfide and a naphthyl lithium carrier to react at room temperature to generate lithium hydrosulfide; then converting at 100-150 DEG C to generate lithium sulfide; and cooling, filtering in an argon atmosphere, washing with an ether solvent, and carrying out vacuum drying to obtain high-purity finely-dispersed lithium sulfide with the purity of more than 99.99%. Compared with the prior art, the lithium sulfide obtained by the preparation method disclosed by the invention is powder which is high in purity, uniform in granularity, fine in dispersion and relatively good in flowability, is stable in process and product quality, can be suitable for industrial-scale production of high-purity lithium sulfide, and has a very good popularization and application value.

This invention relates to the field of metal surface treatment technology, and discloses a magnesium-silver alloy cleaning agent and its preparation and cleaning methods, comprising: a shear coupling step, in which dodecylamine and organophosphonic acid are mixed in an alcohol ether solvent at 60-65℃ and 2500-3000rpm under high shear to construct a high-energy acid-amine assemblage; a hysteresis locking step, in which the shear rate is maintained constant and the temperature is lowered to 35-40℃ at a rate of 1.5-2.0℃ / min to inhibit crystallization and lock it into a metastable precursor; and a dispersion stabilization step, in which a nonionic surfactant is added and dispersed to a semi-transparent state. This invention utilizes the rheological antagonistic mechanism of shear thinning and cooling viscosity increase to construct a metastable system with synchronous transport characteristics, eliminates the kinetic lag caused by preferential solvent wetting, realizes zero-time-difference synchronous adsorption of corrosion inhibitor and solvent on the magnesium-silver interface, and improves the storage stability of the cleaning agent.

The present application relates to an electrolyte composition for a lithium secondary battery and a lithium secondary battery comprising the same, the electrolyte composition comprising a lithium salt and an organic solvent. The organic solvent includes a first ether solvent (R-O-R ') having a fluorinated alkyl group, and a second ether solvent. The first ether solvent may be 5-ethoxy-1, 1, 2, 2, 3, 3, 4, 4-octafluoropentane, 1, 1, 2, 2, 3, 3, 4, 4-octafluoro-5-methoxypentane, or a mixture thereof, and the second ether solvent may be selected from the group consisting of dimethoxyethane, diethyl ether, and similar ethers. The lithium salt includes a compound such as LiTFSI, LiFSI, or LiPF6. The first ether solvent accounts for 30% to 90% by volume of the electrolyte, wherein the concentration of the lithium salt ranges from 0.1 M to 3.0 M. The electrolyte composition enhances battery stability and makes it suitable for use in lithium secondary batteries and lithium metal secondary batteries.

The application belongs to the technical field of secondary batteries, and more particularly relates to a low-temperature microemulsion electrolyte, a preparation method and application thereof. The low-temperature microemulsion electrolyte comprises an electrolyte salt, a symmetrical cyclic ether solvent, a highly chlorinated solvent insoluble in the symmetrical cyclic ether solvent, and a chlorinated ether solvent for dispersing the highly chlorinated solvent in the symmetrical cyclic ether solvent in the form of micelles. Through synergistic effect of the components, an electrolyte system with high ion conductivity, electrode interface stability and wide temperature range adaptability is constructed, effectively solving the core problems of kinetic sluggishness, poor interface stability and short cycle life of the secondary battery in an ultra-low temperature environment. The electrolyte remains liquid at -70 DEG C, and exhibits excellent cycle stability in a wide temperature range of -40 DEG C to 25 DEG C, giving the battery excellent wide temperature range adaptability, breaking the low-temperature performance bottleneck of the secondary battery, and having a broad application prospect.

The application discloses a high-efficiency paint-removing liquid, a preparation method thereof and a wet wipe, wherein the high-efficiency paint-removing liquid comprises, in terms of mass fractions, an alcohol ether solvent, N,N-dimethyl-9-decenamide, an emulsifier, a penetrating agent, a humectant, limonene and a preservative; the alcohol ether solvent is used to improve the polarity of the whole system, can soften and swell the paint film well, and reduce the adhesion of the paint film to a base material; the N,N-dimethyl-9-decenamide is used as a main surface-active paint remover, and the penetrating property of the N,N-dimethyl-9-decenamide can make the paint molecular chain break, so that the paint molecular structure is decomposed; the alcohol ether solvent and the N,N-dimethyl-9-decenamide can cooperate to make the paint layer easy to peel off; the penetrating agent is further used to enhance the emulsification and dispersion of the paint, help the softened and decomposed paint particles stably disperse in the solution, prevent the paint particles from being redeposited, and facilitate subsequent cleaning and removal; and the limonene is used as a complexing agent and cooperates with other components to realize the high-efficiency and thorough paint-removing effect.

A hyperbranched polyimide flexible foam and its preparation method are disclosed. The method includes the following steps: Step 01, sequentially mixing a first type of difunctional aromatic dianhydride, an alcohol solvent, an ether solvent, and a polar organic solvent, and reacting under reflux and stirring to obtain a first type of monoacid-monoester mixture; Step 02, sequentially mixing a second type of difunctional aromatic dianhydride, an alcohol solvent, an ether solvent, a ring-opening catalyst, and a polar organic solvent, and reacting under reflux and stirring to obtain a second type of monoacid-monoester mixture; Step 03, mixing the first type of monoacid-monoester mixture obtained in Step 01 and the second type of monoacid-monoester mixture obtained in Step 02, and adding a polyfunctional isocyanate, stirring until the gas evaporates; Step 04, adding a foam stabilizer and deionized water to the mixture obtained in Step 03, and stirring; Step 05, injecting air into the mixture obtained in Step 04 to obtain a hyperbranched polyimide flexible foam.

The invention discloses a sodium-ion battery low-temperature electrolyte and a preparation method and application thereof. The electrolyte comprises 10-14 wt% of sodium salt, 69-87 wt% of an organic solvent and 2-10 wt% of an additive, wherein the additives comprise an anti-freezing agent and a film-forming additive. According to the invention, the carbonic ester solvent and the ether solvent are used as cosolvents, and the antifreezing agent is introduced and the concentration of the sodium salt is reduced, so that the viscosity of the electrolyte at low temperature is reduced, and the ionic conductivity of the electrolyte is improved; meanwhile, a low-impedance sodium salt additive is added to cooperate with a conventional positive / negative electrode film-forming additive to construct a stable low-impedance positive / negative electrode interface film, and the solvation structure of the electrolyte is regulated and controlled, so that the low-temperature performance of the sodium battery can be improved, and the long cycle life of the electrolyte at normal temperature can be ensured.

The invention discloses a preparation method of a boron-based magnesium salt and alcohol / phenol magnesium additive composite magnesium salt electrolyte, and relates to the technical field of magnesium ion batteries, and the preparation method comprises the following steps: S1, in an inert atmosphere or an air environment, dissolving / dispersing a magnesium source in an organic solvent, and stirring to obtain a solution a; s2, adding alcohol or phenol into the solution a, and reacting to obtain a solution b; s3, performing post-treatment on the solution b to obtain alcohol magnesium salt or phenol magnesium salt crystals; and S4, co-dissolving alcohol magnesium salt or phenol magnesium salt and fluorine-containing alkoxy magnesium borate in an ether solvent according to a molar ratio of 1: (3-100) to form the composite magnesium salt electrolyte. According to the magnesium battery using the electrolyte, the cycle life can be prolonged by 20%-100%, the actual service cycle of the battery is prolonged, the coulombic efficiency is improved to 97%-99.5%, irreversible capacity loss in the charging and discharging process is reduced, the energy utilization efficiency is improved, the oxidation potential is improved by 0.2-0.5 V compared with that of a traditional electrolyte, the stability and oxidation resistance of the electrolyte are enhanced, and the service life of the magnesium battery is prolonged. And the working voltage window of the battery is widened.

The invention discloses a preparation method of an electrolyte suitable for a low-temperature high-voltage lithium metal battery, which comprises the following steps: (1) mixing a film-forming additive and an ether solvent according to a certain proportion, and uniformly stirring to obtain a mixed solvent 1; (2) adding a diluent into the mixed solvent 1, and uniformly stirring to obtain a mixed solvent 2; (3) adding the main lithium salt into the mixed solvent 2, and uniformly stirring to obtain a solution 1; and (4) adding a lithium salt additive into the solution 1, and uniformly stirring to obtain the electrolyte suitable for the low-temperature and high-voltage lithium metal battery. The invention provides a preparation method and application of an electrolyte suitable for a low-temperature high-voltage lithium metal battery, a plurality of strong-coordination anion lithium salts are adopted, strong-coordination anions can be deeply embedded into a first solvation shell layer of Li < + >, a compact solvation sheath in which the anions participate is formed, and the high-temperature lithium metal battery is prepared. The structure guides anions to be subjected to oxidation-reduction decomposition on a positive and negative electrode interface prior to a solvent, and firm SEI and CEI membranes rich in beneficial components such as LiF and LiNXOY are constructed in situ.

The application discloses an interface control liquid for prelithiation electrodes, a preparation method and application, and the interface control liquid comprises a solvent and a metal salt; the solvent comprises one or more of an ether solvent, an ester solvent, a ketone solvent, a hydrocarbon solvent, a nitrile solvent or deionized water; the metal salt comprises one or more of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium bisoxalate borate, lithium bisfluorosulfonimide, lithium bistrifluoromethylsulfonimide, lithium perchlorate, lithium fluoride and lithium chloride; the concentration of the metal salt is 0.001 g / mL-10 g / mL; the prelithiation electrode is obtained by supplementing lithium to an electrode by a chemical prelithiation solution; the interface control liquid is used for modifying the prelithiation electrode, the metal salt of the interface control liquid reacts with the chemical prelithiation solution remaining on the surface of the prelithiation electrode, and a solid electrolyte layer containing inorganic lithium salt is generated on the surface of the prelithiation electrode; wherein, the content of the inorganic lithium salt is between 5% and 90%.

Provided are a lithium metal battery cell, an electrolyte, a battery apparatus and an electrical apparatus. The lithium metal battery cell comprises an electrode assembly and an electrolyte; the electrode assembly comprises a lithium metal negative electrode sheet; the electrolyte comprises a lithium salt and an ether solvent; the ether solvent comprises one or more of the structures shown as formula (1) and formula (2), wherein R1 and R6 each independently comprise any one of unsubstituted or halogen atom-substituted C1-C7 alkyl and C1-C7 alkenyl, R2, R4 and R5 each comprise any one of unsubstituted or halogen atom-substituted C1-C4 alkylene, R3 comprises any one of unsubstituted or halogen atom-substituted C3-C7 alkyl, and R1 and R3 are not simultaneously unsubstituted or halogen atom-substituted C3-C7 alkyl or C3-C7 alkenyl.

The invention belongs to the field of sodium ion battery binders, and discloses a conductive-bonding difunctional polymer binder, a preparation method thereof and an application of the conductive-bonding difunctional polymer binder in a sodium ion battery. According to the invention, a strong reducing solution is prepared from an ether solvent, an aromatic hydrocarbon compound and metal sodium to carry out controllable defluorination on polyvinylidene fluoride, and the C = C-containing conjugated polymer is prepared and endowed with good electronic conductivity. According to an electrode prepared by adopting the conductive binder, the proportion of traditional inactive components can be effectively reduced, the rate capability and the energy density of the electrode are remarkably improved, and wide research prospects and application values are provided for design and development of a high-performance sodium ion battery.

The application provides a sodium metal battery monomer, a battery device and a power utilization device. The sodium metal battery monomer comprises an electrolyte, wherein the electrolyte comprises an electrolyte salt, an ether solvent and an additive, the concentration of the additive is greater than 0.1 mol / L and less than or equal to 0.5 mol / L, and the anion of the additive comprises one or more of BF4 ‑ , C4BO8 ‑ , C2BF2O4 ‑ . The sodium metal battery monomer has improved high-temperature storage performance.

The invention discloses a lithium carbon fluoride battery electrolyte, a preparation method thereof and a lithium carbon fluoride battery, and belongs to the technical field of lithium / carbon fluoride primary batteries. The lithium carbon fluoride battery electrolyte comprises a lithium salt and a monofluoro-substituted short-chain ether solvent. Compared with a non-fluorinated ether solvent, the monofluoroether solvent has good compatibility with a carbon fluoride positive electrode and a metal lithium negative electrode, so that the battery has good discharge performance. Compared with a polyfluoro-substituted ether solvent, the monofluoro substituent group (-CH2F) obviously improves the ionic conductivity of the lithium carbon fluoride battery electrolyte at low temperature, and meanwhile, the monofluoro substituent group (-CH2F) has weak solvation energy at low temperature, so that the discharge platform of the battery at low temperature is obviously improved, and the discharge capacity of the battery is improved.

The application relates to the preparation field of quinoline compounds and discloses a method for preparing a quinoline compound shown in formula (I), which comprises the following steps: in the presence of inert high-boiling-point polyether solvents, substituting a compound shown in formula (III) with 3,5-dichloroaniline to obtain a compound shown in formula (II), and then performing ring closure reaction to obtain the compound shown in formula (I), wherein X1, X3, X4, X5 and X6 are each independently -CN or -COOR'; R' is C1-C4 alkyl; wherein X1 is same as at least one of X3, X4, X5 and X6; X3 and X4 are same or different, X5 and X6 are same or different; X2 is a hydroxyl group or an amino group; R1 and R2 are each independently hydrogen or C1-C4 alkyl; and R1 and R2 are same or different. The method has the advantages of low reaction temperature, low cost and high yield, and is beneficial to industrialization.

This invention discloses a method for preparing trifluoromethyl olefins. The method comprises the following steps: (1) in a haloalkane solvent or ether solvent, a compound as shown in Formula I, CuX'2, CF3SO2Na, N(R) 2 (1) 4X undergoes the addition reaction shown below; (2) The product of the addition reaction in step (1) is reacted with a base in an organic solvent to undergo the elimination reaction shown below. The preparation method of trifluoromethyl olefins provided by the present invention has the advantages of being applicable to electron-rich styrene substrates, requiring less metal catalyst, not requiring high pressure conditions, not requiring photocatalysis, having easy-to-control reaction conditions, being relatively convenient for post-processing, and having a high yield.

The invention provides a lithium ion battery which comprises an electrolyte and is characterized in that the electrolyte comprises a fluorine solvent; the fluorine solvent comprises one or more of a fluoro-ether solvent, a fluoro-carbonate solvent and a fluoro-carboxylic ester solvent; and when the mass fraction of the fluorine solvent in the electrolyte is b and the charging current is 6C, the lithium precipitation SOC potential of the lithium ion battery is aV, and a / b is more than or equal to 21 and less than or equal to 83. According to the lithium ion battery, by controlling the lithium precipitation SOC potential of the battery, the fast charging performance of the lithium ion battery is improved, and meanwhile, the fluorine solvent is added into the electrolyte, so that the fast charging performance of the lithium ion battery is ensured, and meanwhile, the problem that the growth rate of DCR is increased due to reduction of the lithium precipitation SOC potential is solved. The fast charging performance and the cycle life of the battery are further improved by controlling the relationship between the mass content b of the fluorine solvent and the lithium precipitation SOC potential a.

The invention discloses a biological tissue sample preparation sleeve solution, and belongs to the technical field of biological sample preparation. The stationary liquid comprises: 8-12% of an aldehyde cross-linking agent; 1-3% of a phosphate buffer system; and the balance of purified water. The dehydration liquid comprises the following components: 55-70% of an alcohol solvent; 10 to 20 percent of isopropanol; 10-20% of an ester organic solvent; 0.5 to 2 percent of a non-ionic surface active agent; the transparent liquid comprises the following components: 50-70% of a polyol compound; 10-20% of an ether cosolvent; 10 to 30 percent of isopropanol; the refractive index of the transparent liquid is 1.47 to 1.52; the cleaning solution comprises the following components: 60-85% of a polyol solvent; 10-20% of an ether solvent; 1-3% of an anionic surfactant; 0.1-1% of a complexing agent; and the balance of purified water. Tissue shrinkage is effectively reduced, the cell structure is kept complete, the transparency effect is improved, and microscopic observation and dyeing analysis are facilitated.

The invention discloses Ag / Al composite ink with conductivity, excellent printability and electrochemical activity as well as a preparation method and application of the Ag / Al composite ink, and belongs to the technical field of printed electronic functional materials. The problem that existing conductive ink is inert metal and cannot directly participate in electrochemical reaction is solved. The preparation method comprises the following steps: preparing aluminum dispersion liquid; then mixing a resin binder, an organic alcohol ether solvent and a functional auxiliary agent to obtain an organic carrier; mixing the flake silver powder with an organic carrier to obtain a conductive silver substrate; and dropwise adding the aluminum dispersion liquid into a conductive silver substrate, and stirring to obtain the Ag / Al composite ink. The silver powder constructs a continuous three-dimensional conductive network, the aluminum powder serves as a discrete electrochemical activity center, and balance of electrochemical activity and conductivity is achieved. The ink disclosed by the invention is adaptive to air pressure extrusion type printing and silk-screen printing, and the asymmetric active electrode prepared by printing can be used for preparing an electrochemical device and has high sensitivity, quick response and excellent cycling stability.

A lithium secondary battery according to the present disclosure includes: a cathode which includes a cathode active material layer including a lithium transition metal oxide; an anode disposed opposite to the cathode and including an anode active material layer, and an electrolyte which includes a lithium salt, a solvent including a carbonate solvent and an ether solvent, and lithium nitrate (LiNO3). In the electrolyte, a lithium nitrate dissolution ratio, defined by Equation 1, in the electrolyte is 0.01 to 0.07.

The present application relates to a kind of synthesis method of tetramethyl biphenyl diphenol type epoxy resin, belong to epoxy resin preparation technical field.The yield of tetramethyl biphenyl diphenol type epoxy resin synthesized in the present application is greater than 94%, and total chlorine content is less than 240ppm.This is due to the process of two-step reaction in the present application, while adding mixed ether solvent consisting of diethylene glycol dibutyl ether, isobutoxy cyclohexane and triethyl glycerol ether in etherification reaction stage, diethylene glycol dibutyl ether and isobutoxy cyclohexane are slightly soluble in water, triethyl glycerol ether is insoluble in water, but the three solvents have good solubility for epoxy chloropropane and phenolic compounds, the use of three compounds can form transition phase, promote the migration of basic catalyst in aqueous phase to two-phase interface to participate in reaction, promote etherification reaction to proceed stably, avoid the occurrence of side reaction, and then improve product yield and purity, reduce total chlorine content.

The invention relates to the technical field of coatings, and aims to provide a preparation method and a use method of a neodymium-iron-boron magnet water-based anticorrosive coating. Comprising the following steps: mixing bisphenol A epoxy resin, n-butyl alcohol and ethylene glycol monobutyl ether, and mixing methacrylic acid, butyl acrylate, styrene and an initiator; mixing the two mixed solutions drop by drop, and reacting to obtain water-based acrylic acid modified epoxy resin; the preparation method comprises the following steps: uniformly mixing organic siloxane, deionized water and propylene glycol monomethyl ether, and reacting to obtain water-based silica sol; uniformly mixing the water-based acrylic modified epoxy resin, the water-based silica sol, the ether solvent, the ultra-fine filler, the curing agent, the carbon black color paste and the deionized water, adding the deionized water, uniformly stirring, and filtering to obtain the water-based anticorrosive coating. The product is high in environmental protection property and small in influence on the environment; the method is simple and efficient to use, easy to operate, low in energy consumption requirement and suitable for large-scale industrial production; and the compactness and the corrosion medium infiltration resistance of the coating are remarkably improved, and the coating has excellent corrosion resistance.