192 results about "Ethylene glycol monoethyl ether" patented technology

The present invention relates to a method of producing an electroconductive cellulose-based film having high uniformity and transparency and excellent in optical properties while preventing a bleaching phenomenon at the time of forming an electroconductive layer. The method of producing an electroconductive cellulose-based film according to the present invention is a method of producing an electroconductive cellulose-based film by coating a cellulose-based film with a coating solution containing a binder, superfine particles and a solvent to form an electroconductive layer thereon, wherein the coating solution comprises at least one kind of glycol monoalkyl ether-based solvent selected from the group consisting of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, and propylene glycol monoethyl ether in an amount of 20 to 40% by weight based on the total solvent, and a ketone-based solvent in an amount of 20 to 50% by weight based on the total solvent.

The invention provides an environmental-friendly water-based detergent for soldering tin residues and a preparation and use method of the environmental-friendly water-based detergent, and relates to the field of water-based detergent preparation. The environmental-friendly water-based detergent is prepared from the following raw materials in parts by weight: 10-20 parts of tetrahydrofuran, 5-15 parts of ethylene glycol monoethyl ether, 7-15 parts of a surfactant, 1-13 parts of a saponifying agent, 1-5 parts of ethylene diamine tetraacetic acid tetrasodium, 2-4 parts of sodium borate, 1-5 parts of oleic acid triethanolamine, 1-5 parts of sodium citrate, 2-4 parts of glycerin monostearate, 5-8 parts of zinc stearate, 0.1-0.5 part of a defoaming agent, 0.5-2.5 parts of a corrosion inhibitor, 3-5 parts of carboxymethyl chitosan and 90-130 parts of deionized water. The environmental-friendly water-based detergent for soldering tin residues, which is provided by the invention, is capable of forcefully cleaning residues at soldering points of products after tin soldering, the soldering points are kept bright after cleaning, and cleaned parts are free of residue substance or whiting.

The invention adopts gas chromatography-mass spectrometry (GC-MS) to originally simultaneously determine residual contents of 9 kinds of organic substances in toy, including ethylene glycol monoethyl ether (EGEE), styrene, trimethylbenzene, isophorone, 2-methoxyethyl acetate, 2-ethoxyethyl acetate, cyclohexanone, bis(2-methoxyethyl) ether, and nitrobenzene. Common detection device is adopted in the method. The method provided by the invention has the advantages of easy popularization, simultaneous detection to save time, improved efficiency, low cost, high detection rate and sensitivity, and high application value in toy production and quality detection.

The invention relates to a thickness-controllable bismuth nanosheet, and a preparation method and application of an alloy, and aims at solving the technical problems that when a traditional metal catalyst is used for converting carbon dioxide into formic acid, the efficiency is low, the overpotential is high, the hydrogen evolution potential is relatively positive, and the stability is poor. The bismuth nanosheet with the thickness of only 0.7nm monatomic layer is obtained for the first time by using salts of bismuth as raw materials, ethylene glycol monoethyl ether as a solvent and a solutionwith strong reducibility such as NaBH4 or LiBH4 as a reducing agent through an aqueous solution reduction method under the protection of an inert gas, and the thickness of the bismuth nanosheet is adjustable. The thickness controlled bismuth nanosheet prepared by the method shows excellent CO2 catalytic reduction performance; the Faradic efficiency of catalyzing CO2 to generate formic acid by using the bismuth nanosheet in the case of overpotential being 330mV can reach 98%; the initial overpotential of the bismuth nanosheet is as low as 80mV; the stability of the bismuth nanosheet is as longas 75h; and even the bismuth nanosheet is treated for 4h at the temperature of 300 DEG C, the thickness and catalytic performance of the bismuth nanosheet hardly change, thus further the fact that the bismuth nanosheet has superhigh stability is verified.

The invention discloses a nano light absorption composite material and a preparation method thereof, and a coated film preparation method. The nano light absorption composite material comprises an organic main agent, an auxiliary agent and an inorganic functional nano material, wherein the organic main agent is selected from at least one of ethylene glycol, diethylene glycol monobutyl ether, diethylene glycol dibutyl ether, ethylene glycol monoethyl ether acetate, n-butyl acetate, terpilenol, n-butanol and methyl isobutyl ketone; the auxiliary agent includes at least one of dispersant, thickener, flatting agent and defoaming agent; and the inorganic functional nano material is selected from at least one of zinc oxide, zinc sulfide, indium oxide, titanium dioxide, MxO, gallium compounds, cadmium telluride, calcium titanate, perovskite, graphene and nano precious metal. According to the nano light absorption composite material disclosed by the invention, a multilayer efficient antireflection branched structure is constructed on a surface of a textured antireflection layer of a crystalline silicon solar cell piece, so that a solar cell has excellent overall properties such as high incident light absorption, improved short circuit current, good electrical property and the like.

The invention discloses an antibacterial and scrubbing-resistant waterborne coating for a glass door. The waterborne coating is characterized by being prepared from the following raw materials in parts by weight: 34-37 parts of waterborne epoxy emulsion, 13-15 parts of waterborne organosilicone emulsion, 20-24 parts of vinyl acetate / butyl acrylate emulsion, 2-4 parts of triethylene glycol monoethyl ether, 0.3-0.6 part of alkanolamine alkoxy titanate, 0.3-0.5 part of a flatting agent BYK-310, 0.1-0.2 part of nanobacteria cellulose, 0.2-0.4 part of white oil, 0.5-1.0 part of polyethylene glycol methacrylate, 0.4-0.6 part of tetrachloro isophthalonitrile, 0.3-0.5 part of fatty acid polyoxyethylene ether, 0.4-0.7 part of citral, 0.2-0.4 part of cuprous oxide, 3-5 parts of a modified titanium dioxide photocatalyst, 1-2 parts of pigment and 10-15 parts of deionized water. The coating for the glass door has the advantages of excellent water resistance, high hardness, scrubbing resistance and low film forming temperature as well as excellent performance, low cost, strong adhesion after curing and no peeling and is non-toxic and environmentally friendly; by adding a plurality of organic, inorganic, and natural antibacterial agents, the antibacterial property of the coating is enhanced; and by adding modified titanium dioxide photocatalyst, the air can be effectively purified, bacteria can be killed and the deodorant effect, taste removal effect, antifouling effect and the self-cleaning function are achieved.

A photomask plate with a film surface protective layer is characterized in that a protective layer forming solution is prepared by mixing a main constituent comprising a two-liquid cross-linked antifouling surface coating agent, prepared by combining a mixed resin of a fluororesin and an acrylic resin in a solvent mixture of n-butyl acetate, methyl ethyl ketone (MEK) and methyl isobutyl ketone (MIBK), with a cross-linking curing agent, prepared by mixing a polyisocyanate prepolymer and ethyl acetate, and a diluent comprising n-butyl acetate, methyl ethyl ketone (MEK) and cellosolve (ethylene glycol monoethyl ether) acetate. This protective layer forming solution is applied to a film surface of a photomask plate photosensitive emulsion layer produced by forming the film surface of the photosensitive emulsion layer (an emulsion photomask) on a substrate. The protective layer forming solution is then aged to form a film surface protective layer in a laminated manner. The resulting inexpensive and durable photomask is protected from being soiled or marked while having minimal reduction in ultraviolet light transmittance.

The invention discloses a coloring agent for a wear-resistant floor, and a preparation method thereof. The coloring agent for the wear-resistant floor is composed by mixing the following e components according to a normal method, by weight, 2-20 parts of nanometer color paste, 80-96 parts of a solvent and 2-6 parts of a light stabilizer, wherein the solvent is one or a mixture of ethanol, isopropanol, cyclohexanone, methyl ethyl ketone, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol diacetate, ethyl acetate, dimethylbenzene and methylbenzene; and the light stabilizer is one or a mixture of a light screener, a ultraviolet ray absorber, a quencher and a radical scavenger. The coloring agent for the wear-resistant floor can penetrate in the wear-resistant floor, is rich is color, has firm color, can bear multiple grind, is not obvious in fade after being grinded; and has relatively good endurance.

The invention discloses efficient natural gas. The efficient natural gas consists of natural gas with purity higher than 95% in percentage by weight, and 0.3-0.5% of a liquid-phase synergistic additive in terms of weight percentage of the natural gas, wherein the liquid-phase synergistic additive consists of the following raw materials: 200# solvent oil, isopropanol, petroleum ether, ethylene glycol monoethyl ether, turpentine, tung oil, isooctyl nitrate, dimethyl carbonate, tert-butylferrocene or ferrocene, methyl tertiary butyl ether or n-octyl ferrocene, p-tert-butylcatechol, azodiisobutyronitrile and polyether. The efficient natural gas, through adding little liquid-phase synergistic additive in the natural gas, can obviously improve burning temperature and burning efficiency; meanwhile, the liquid-phase synergistic additive is low in corrosion and good in volatility on containers.

The invention belongs to the technical field of water treatment, and particularly relates to sustained-release nano-calcium peroxide materials, preparation thereof, and a method for removing chlorohydrocarbon and benzene series from underground water by strengthening and activating the sustained-release nano-calcium peroxide materials through ferrous sulfide. By taking calcium chloride, hydrogen peroxide with the mass fraction being 30% and ammonium hydroxide with the mass fraction being 30% as raw materials and by adding different dispersing agents, an irreversible coagulation phenomenon is avoided in the synthesis process, then by adding different macromolecular polymers such as polyethylene glycol 400 (PEG400), polyvinyl alcohol (PVA) and diethylene glycol monoethyl ether (DEGMME), a film is formed on the surface of nCaO2, and through processes such as washing with water and ethyl alcohol and vacuum drying, the sustained-release nano-calcium peroxide advanced oxidation materials embedded with the various macromolecular polymers are obtained. By applying the oxidation materials, the purposes of efficient and lasting treatment of pollutants and lowering of the repair cost of the underground water in contaminated sites are achieved.

Disclosed is a resist stripping composition which takes a liquid form at a working temperature, hardly causes a metal (e.g., copper) to corrode, is easy to be filtered, and can be re-used readily. Theresist stripping composition comprises a mixture of at least one member selected from a cyclic ester having a 3- to 6-membered ring (e.g., ethylene carbonate, propylene carbonate), a ketone having alower alkyl group (e.g., acetone, methyl ethyl ketone) and a specific alkylene glycol monoalkyl ether (e.g., ethylene glycol monoethyl ether, diethylene glycol monobutyl ether), and a specific cyclicamide (e.g., N-methyl-2-pyrrolidone) or a specific linear amide (e.g., N,N-dimethylacetoamide, N,N-diethylacetoamide).

A flexible transparent conductive film coating material of doped graphene and white graphene oriented to a liquid coating process, comprising a corona-treated PET or composite substrate layer, and a conductive paint coated on the surface of the PET or composite substrate layer layer, the conductive coating layer includes the following raw materials in weight percentage: 20-50% isopropanol, 20-50% n-butanol, 10-20% ethylene glycol monoethyl ether, 1-5% acetyl tributyl citrate, Adhesive 5-10%, Span 851-5%, ethyl cellulose 0.8-5%, 20-30 nanometer silver powder 4-10%, 100-400 nanometer silver powder 15-20%, graphene homogeneous solution 0.5-5 %, white graphene homogeneous solution 0.5-5%. The conductive film material has the characteristics of stable conductivity of the film-forming surface, low resistivity, high light transmittance, and strong adhesion. At the same time, the film material makes full use of the special properties of white graphene and graphene materials to achieve high performance after film formation. Transparent, conductive, heat dissipation, wear-resistant and other multiple effects.

The invention discloses a new-typed macromolecular sand-binding agent and making method, which comprises the following steps: adding vinyl acetate, butyl acrylate, acroleic acid and initiator in the composite liquid of deionized water and gelatin; copolymerizing to obtain polymer particle; washing polymer particle; drying to blend with diethylene glycol monoether and ammonia to synthesize the product.

The invention discloses a determination method for insoluble substances in a polymer. The determination method comprises the following steps of a. weighing the polymer, dissolving the polymer completely in ethylene glycol monoethyl ether; b. weighing a 0.40-0.55 [mu]m filter membrane, suction filtering with the 0.40-0.55 [mu]m filter membrane, the insoluble substances being left on the membrane, and suction filtering the filter membrane until the filter membrane is dried; c. taking the filter membrane down, putting the filter membrane into a vacuum drier with a vacuum degree of 450-550 mmHg, drying for 1-1.5 hours at a room temperature, taking out the filter membrane, weighing to obtain the weight of the residual substances; and d. calculating the content of the insoluble substances in the polymer. The content of the insoluble substances in the polymer is calculated by drying and weighing under a vacuum condition at the room temperature. Instrument and equipment used in the method are easily available and low in cost and can be easily popularized.

The invention provides a preparation method for Tadalafei I type. The preparation method comprises the following steps of: heating a Tadalafei crude product to the temperature of between 50 and 140 DEG C; dissolving the Tadalafei crude product in ethylene glycol monoethyl ether, ethylene glycol diethyl ether, ethylene glycol monomethyl ether, 1,3-dioxolane or a mixed solvent of two or three thereof; cooling a system to obtain a crystal; and separating to obtain a precipitate. The preparation method has the characteristics of low solvent consumption and high yield. By the method, a pure I type Tadalafei crystal can be obtained; and by the crystallization method, the product can be purified and optical purity can be improved.

The invention discloses a food glass container cleaning agent, which consists of the following ingredients in part by weight: 15 to 25 parts of 85 weight percent phosphoric acid, 8 to 12 parts of polyoxyethylene octylphenol ether, 25 to 35 parts of sodium gluconate, 10 to 15 parts of dodecyl polyoxyethylene ether sodium sulfate, 3 to 5 parts of sodium silicate, 1 to 2 parts of sodium hypochlorite and 1 to 2 parts of ethylene glycol monoethyl ether. The product has the performance such as hard water resistance, sterilization and the like, the grease removal capability is high, stain attached on food glass containers such as soft beverage containers, beer bottles and the like can be removed, the glass bottles are bright and transparent after being washed, and no water mark is left over.

The invention relates to a method for synthesizing vanillin, comprising the following steps of: carrying out material thermal pretreatment by adopting a pressured reaction axe, and then pouring the materials into a cannular slurry reactor for vanillin synthetic oxidation reaction; and by using 4-methyl-2-metoxyphenol as a raw material, using ethylene glycol monomethyl ether or ethylene glycol monoethyl ether as a solvent and using oxygen as an oxidant, carrying out the oxidation reaction for synthesizing vanillin in a way of intermittently feeding oxygen. The conversion rate of the 4-methyl-2-metoxyphenol as the raw material reaches more than 99%, the selectivity of the vanillin reaches more than 93%, and the separation yield reaches about 82%. The oxidation test carried out in the cannular slurry reactor proves that the oxidation reaction of the 4-methyl-2-metoxyphenol can be successfully carried out in the reactor under a milder condition to synthesize vanillin, and the method avoids a danger of easy explosion of the traditional axe type oxidation technology process for synthesizing vanillin by using methanol as the reaction solvent and has the advantages of environmental-protection process and high efficiency.

A photoresist developer composition is provided, to improve miscibility and to suppress or minimize the generation of residue after development, thereby enhancing the precision of photoresist pattern. The photoresist developer composition comprises 1-10 wt% of an inorganic alkali; 0.1-3.0 wt% of an organic solvent; 1.0-20.0 wt% of a surfactant; and 67-97.9 wt% of water. Preferably the inorganic alkali is selected from the group consisting of KOH, NaOH, sodium phosphate, sodium silicate, sodium carbonate, sodium bicarbonate and their mixtures; the organic solvent is selected from the group consisting of methanol, ethanol, 1-propanol, 2-propanol, butanol, diacetone alcohol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, dipropyl glycol monomethyl ether, dipropyl glycol monoethyl ether and their mixtures; and the surfactant is a mixture of a nonionic surfactant and an anionic surfactant.

The invention discloses a dustproof and bactericidal type aqueous coating material for glass doors. The dustproof and bactericidal type aqueous coating material is characterized by being prepared from the following raw materials in parts by weight: 34-38 parts of aqueous polyurethane resin, 28-34 parts of acrylic epoxy resin, 8-12 parts of modified styrene-acrylic emulsion, 0.4-0.8 part of polyvinyl alcohol, 1-3 parts of diethylene glycol monoethyl ether, 0.3-0.6 part of alcohol-amine dipyrophosphate acyloxy glycolate titanate, 0.2-0.5 part of polyether modified polyorganosiloxane, 0.2-0.4 part of cellaburate, 0.3-0.6 part of dioctyl sodium sulfosuccinate, 0.4-0.7 part of acetoacetoxy ethyl methacrylate, 0.6-1.2 parts of climbazole, 3-5 parts of ethylene glycol, 0.5-1.0 part of graphene, 1-2 parts of pigment and 10-15 parts of deionized water. According to the aqueous coating material disclosed by the invention, on the basis of high adhesion, water resistance and alcohol acid resistance, the modified styrene-acrylic emulsion is added, so that the bactericidal, dustproof and anti-electrostatic effects of the coating material are improved; added climbazole has spectrum sterilization property, so that the quality of the coating material is further improved; and the coating material disclosed by the invention is simple in operation and low in production cost, does not contain benzene solvents and heavy metals, is harmless to human bodies and environment, is environment-friendly and safe and is suitable for being popularized.

The present invention discloses a Shenmai soft capsule with the functions of nourishing yin and promoting the production of the body fluid. It is made up by using 6 Chinese medicinal materials of red ginseng, adenophora root, ophiopogen tuber, polygonatum root, Chinese yam and lyceum berry and at least on kind of medicinal auxiliary material selected from vegetable oil or polyethylene glycol or ethylene glycol monoethyl ether through a certain preparation process.

The invention provides a wetting reversal agent for pressure reduction and augmented injection of an ultra-low permeability reservoir. The wetting reversal agent is prepared from the following raw materials: a cationic gemini surfactant, a nonionic surfactant, an efficient anti-swelling swelling shrinkage agent, ethanol, ethylene glycol monoethyl ether and deionized water. The cationic gemini surfactant has a structure as shown in a formula I which is described in the specification, wherein n is equal to 3-18. The invention provides the wetting reversal agent for pressure reduction and augmented injection of an oil field and a preparation method of the wetting reversal agent. The effects of pressure reduction, augmented injection and yield increase of the sensitive ultra-low-permeability hydrophilic water-injection high-pressure oil reservoir are improved.

The present invention relates to a method of producing an electroconductive cellulose-based film having high uniformity and transparency and excellent in optical properties while preventing a bleaching phenomenon at the time of forming an electroconductive layer. The method of producing an electroconductive cellulose-based film according to the present invention is a method of producing an electroconductive cellulose-based film by coating a cellulose-based film with a coating solution containing a binder, superfine particles and a solvent to form an electroconductive layer thereon, wherein the coating solution comprises at least one kind of glycol monoalkyl ether-based solvent selected from the group consisting of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, and propylene glycol monoethyl ether in an amount of 20 to 40% by weight based on the total solvent, and a ketone-based solvent in an amount of 20 to 50% by weight based on the total solvent.

The present invention relates to a preparation method of the glycol monoethyl ether. The preparation method uses the continuous membrane reactor and the following process: 1. the catalyst consisting of the active ingredient and the carrier with the quality ratio being 0.1 to between 20 and 100 is prepared; the carrier is the MgO / CoO complex with the atomic number ratio that the ratio between the Mg and Co is between 3 and 5 to 1; the active ingredient is one or a plurality of the oxides of the La, Ce, Al, Ni or Cu; 2. the glycol monoethyl ether is to be synthesized; the catalyst prepared in the first step is arranged in the tubular membrane of the continuous membrane reactor; the nitrogen is used to blow and sweep outside the membrane; the ethanol and ethylene oxide with the molar ratio being between 3 and 4 to 1 are used as the raw materials; at first, the ethanol is preheated and gasified at the temperature between 90 and 100 Celsius system; the gas-phase ethoxylated reaction is done at the room pressure and the temperature between 100 and 140 Celsius system; the air speed of the reactive gas is (1-3) multiplied by the 103ml question mark g-1question mark h-1; thus, the glycol monoethyl ether can be made.

The invention provides a cleaning production technology of glycine. The glycine is produced through glycols solvents (ethylene glycol, propylene glycol and butyl glycol) or diol derivative solvents (ethylene glycol monomethyl ether, ethylene glycol monoethyl ether and ethylene glycol monobutyl ether) and methanol (or ethanol) organic solvents. After the organic solvents and catalyst methenamine are added in a reactor for producing the glycine, chloroacetic acid is added, then, nitrogen is slowly fed in, and a reaction for synthesizing the glycine is performed. After the reaction ends, glycine crystals are filtered out at the temperature ranging from 50 DEG C to 75 DEG C, and glycine products are obtained after methanol (or ethanol) washing, filtering and drying. After filtering liquid is cooled, ammonium chloride and mixed crystal solids including a small amount of glycine are obtained through filtration, and ammonium chloride products are obtained through washing. The reaction solvents are cyclically used.

The invention discloses a non-phosphorous water-based degreasing agent and a preparation method and application thereof. The non-phosphorous water-based degreasing agent is prepared by non-ionic emulsifier, non-ionic penetrant, sodium metasilicate, sodium carbonate, isopropanol, dichloromethane, ethylene glycol monoethyl ether, low molecular sodium polyacrylate, defoamer, triethanolamine and water. The preparation method comprises the following steps of sequentially adding sodium metasilicate, sodium carbonate, low molecular sodium polyacrylate and triethanolamine into the water during stirring; obtaining a mixed water solution after dissolving; mixing and stirring other components uniformly; adding the other components into the mixed water solution and stirring the mixture uniformly to obtain the non-phosphorous water-based degreasing agent. The non-phosphorous water-based degreasing agent is mainly applied to steel workpiece degreasing and is free of phosphorous, reusable and good in degreasing effect; and a water film on the surface of a test piece after being degreased is uniform, quantity of oil left on the surface of steel is smaller than 0.2g / m2, and good steel surfaces are provided for follow-up phosphating.

The invention discloses a nucleic acid releasing agent. The nucleic acid releasing agent comprises a composition of Triton X-100 and diethylene glycol monoethyl ether (DCDE) with a mass ratio of 1: (1-3). The low-cost composition of Triton X-100 and DCDE is adopted to replace a traditional guanidine salt and a detergent, and the obtained nucleic acid releasing agent has advantages of safe use, easy degradation, simple operation, and low manufacturing cost, can effectively lyse serum samples containing pathogens, quickly release nucleic acids therein, reduce inhibition of downstream experiments, and has high pathogen lysis efficiency. The invention also discloses an HPV virus nucleic acid detection kit. The kit comprises the nucleic acid releasing agent, is simple and convenient to operate,and high in working efficiency, effectively avoids a link that may occur during the experimental operation, reduces loss of HPV DNA in an extraction process, and has a quantification limit of 45 IU / mL and a detection limit of 22 IU / mL.

A method for combining ethylene glycol monoethyl ether in a fixed bed reactor with ethanol and ethylene oxide as raw materials and ternary composite metal oxide as a catalyst is disclosed. The catalyst is prepared by roasting a Mg-Al-Fe type ternary hydrotalcite precursor. The composition of the precursor is (MgO)15(Al2O3)2.5(Fe2O3)x, wherein the x in the formula is 0.25-2.5. By means of the method, ethylene oxide conversion rate can reach 92.97%, and ethylene glycol monoethyl ether selectivity can reach 86.75%. Simultaneously the method resolves the problem in the prior art that a product is wide in molecular weight distribution and the catalyst and the product are difficult to separate, and greatly improves product quality and production efficiency.

The preparation method comprises the following steps: carrying out esterification reaction on a binary monomer A and a binary monomer B serving as raw materials to obtain an esterification product, and adding a polybasic monomer C into the esterification product or simultaneously adding the polybasic monomer C and a polybasic monomer D for polycondensation reaction to obtain copolyester; wherein the acid value of the copolyester is 30 to 70 mg KOH / g; dissolving the prepared copolyester in water under the conditions that the temperature is 65-90 DEG C and ammonia water and a cosolvent are added; wherein the cosolvent is more than one of isopropanol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol methyl ether acetic ether,dimethylethanolamine and propylene glycol methyl ether. The copolyester prepared by the method disclosed by the invention can be dissolved in water under specific conditions to prepare the water-soluble copolyester coating, does not use an organic solvent, and has the advantages of environmental protection, no pollution, no harm to human bodies and the like; meanwhile, various polar groups are introduced, and hydroxyl and carboxyl can react with an isocyanate curing agent to form cross-linked network structure resin.

The invention discloses a polymeric dispersant for water-based paint and a preparation method thereof. The polymeric dispersant is prepared by polymerizing a styrene-maleic anhydride copolymer, ethylene glycol monoethyl ether and polyethylene glycol. The preparation method comprises the following steps: 1, adding the styrene-maleic anhydride copolymer, ethylene glycol monoethyl ether, polyethyleneglycol and a solvent into a reaction kettle, adding an initiator and a neutralizer aqueous solution, and carrying out a constant-temperature reaction at 60-120 DEG C for 2-12 hours. In the invention,the structure of the polymer dispersant contains a plurality of anchoring groups such as benzene rings, hydroxyl and the like; therefore, the water-based pigment dispersing agent can generate a strong adsorption effect with the surface of pigment, has an excellent dispersing effect on inorganic pigment and organic pigment, and can reduce the viscosity of a dispersing system, improve the flowability and fineness of the dispersing system and improve the storage stability of a coating when being used for dispersing the pigment in a water-based system.

The invention relates to a method for preparing bilastine. The method comprises the following steps: adding a compound I oxazolol to water, adding a phase transfer catalyst, p-toluenesulfonyl chlorideand sodium hydroxide, stirring and reacting all above substances, and performing filtration to obtain oxazolol sulfonate; adding the sulfonate to water, adding 2-(4-piperidinyl)-1-H-benzimidazole andthe phase transfer catalyst, adding sodium carbonate or potassium carbonate, heating the obtained suspension, performing a reaction for 3-5 h, filtering the obtained intermediate II, adding the intermediate II to a strong polar aprotic solvent, adding sodium hydroxide and the phase transfer catalyst, adding ethylene glycol monoethyl ether tosylate, stirring and reacting the obtained mixture at -20-60 DEG C, filtering the obtained reaction product, and washing the filtered reaction product with water to obtain an intermediate III; and adding the intermediate III to an aqueous solution of an organic acid, performing refluxing for 3-5 h, adding water, adding a strong alkali until saturation, refluxing the obtained solution for 3-5 h to generate a bilastine salt insoluble in the saturated alkaline solution, and performing extraction to obtain the bilastine. The method has the advantages of mild reaction conditions, simplicity in operation, greenness, environmental protection, high yield,and convenience in industrial production.