40 results about "Butyl acetate" patented technology

This invention belongs to the field of coating technology, specifically relating to a moisture-proof and stain-resistant acrylic resin coating and its preparation process. The moisture-proof and stain-resistant acrylic resin coating comprises 100 parts by weight of a main agent and 20-25 parts by weight of a curing agent. The main agent comprises the following raw materials in weight percentages: dispersant 1.5-3%, butyl acetate 10-15%, xylene 5-10%, filler 10-20%, titanium dioxide 10-20%, carbon black 1-5%, cellulose acetate butyrate 1-2%, anti-settling agent 1-1.5%, leveling agent 0.5-1%, defoamer 0.1-0.5%, with the balance being acrylic resin. The moisture-proof and stain-resistant acrylic resin coating of this invention exhibits excellent comprehensive performance, high filling and sealing properties, strong adhesion to alloys, and good stain resistance, water resistance, and gloss retention.

The invention belongs to the technical field of power transmission, and provides an anti-icing aluminum cable steel reinforced and a preparation method thereof.The preparation method comprises the steps that an ethylene glycol solution and mesoporous silica are mixed, and modified silica is obtained; mixing fluorinated polyurethane, butyl acetate and the modified silicon dioxide solution to obtain a composite coating; and coating the composite coating on the surface of the steel-cored aluminum stranded wire, and curing to obtain the anti-icing steel-cored aluminum stranded wire. After coating, the resin is cured to form a continuous three-dimensional network, and the modified silicon dioxide is fixed on the surface of the coating, so that a micro-nano coarse structure is constructed, and a rapid water guide effect is realized; fluorocarbon chains in the fluorine-containing coupling agent form a low-surface-energy molecular layer, so that the purpose of hydrophobic chemical modification is achieved; ethylene glycol in silicon dioxide can be actively released from the pore channels, the freezing point is reduced, and the long-acting anti-icing target is achieved. The anti-icing effect of the steel-cored aluminum strand is achieved through a triple mechanism of micro-nano structure water diversion, low-surface-energy molecular layer hydrophobicity and modified silicon dioxide freezing point reduction.

The invention provides a method for preparing oxacillin sodium by using a microchannel reactor. The oxacillin sodium is prepared by adopting micro-channel reactors, firstly, a 6-APA dissolved clear solution, liquid-state oxacillin acyl chloride, a sodium hydroxide solution and a sulfuric acid solution are prepared in advance, the 6-APA dissolved clear solution and molten-state oxacillin acyl chloride are oppositely added in the first micro-channel reactor, fine liquid drops are formed through atomization and collide with each other to be fully reacted, and then the oxacillin sodium is prepared. The collided and mixed liquid flows through a second micro-channel reactor and then enters a four-opening bottle, butyl acetate is added after the liquid reacts in the four-opening bottle for a period of time, acidification and phase splitting are conducted, a sodium acetate solution is fed into the four-opening bottle, crystallization, filtering, washing and drying are conducted, and a finished oxacillin sodium product is obtained. According to the method for preparing the oxacillin sodium by using the microchannel reactor, the molar yield of the oxacillin sodium prepared by using the method is relatively high, the time of an acylation reaction stage is greatly shortened, and the total impurities of the oxacillin sodium are effectively reduced.

The application discloses a modified organosilicon defoaming agent and a preparation method thereof, and relates to the technical field of defoaming. The modified organosilicon defoaming agent and the preparation method thereof comprise the following components by mass ratio: 89.57 g of liquid mercaptan silicone oil, 20.30 g of triethylamine, 89.57 g of dimethyl sulfoxide, 3.45 g of a methyl-terminated allyl polyoxyethylene ether, 13.80 g of a methyl-terminated allyl polyoxypropylene ether, 0.34 g of azobisdimethyl isobutyronitrile, 32.25 g of butyl acetate, 19.29 g of 2-bromoisobutyrate methyl ester, a magnesium sulfate and sodium chloride aqueous solution, a coupling agent and a thickening agent. The modified organosilicon defoaming agent has good defoaming performance and bubble inhibiting performance, has strong compatibility with different emulsions, and has defoaming performance and bubble inhibiting performance equivalent to polyether defoaming agents in a water-based resin system.

The application discloses a kind of anti-icing super-hydrophobic material preparation methods, with aluminum plate as substrate;First, blast furnace slag powder and steel slag powder are treated with hydrophobic modification, blast furnace slag powder and steel slag powder are mixed according to certain mass ratio, mixed powder and organic solvent A absolute ethyl alcohol are stirred in round bottom flask, after solution is fully mixed, organic solvent B seventeen fluorine decyl triethoxysilane is added and transferred to water bath heating tank water bath heating and stirring;Modified blast furnace slag-steel slag powder, organic solvent C butyl acetate are uniformly mixed according to 3:8 ratio, after reaction ten minutes, two-component polyurea is added drop by drop, and super-hydrophobic coating is obtained by drying.The present application uses blast furnace slag waste as main raw material, adds a small amount of steel slag to improve the wear resistance of coating, uses two-component polyurea as adhesive, uses modified-spraying two-step method, without large instrument equipment, and super-hydrophobic coating with excellent wear resistance is prepared simply and quickly.

The application belongs to the field of paint, and particularly discloses PU white primer, a preparation method and application thereof. The PU white primer comprises A component, B component and C component. The A component comprises hydroxyl acrylic acid resin, castor oil, dispersing agent, defoaming agent, cyclohexanone, silicon dioxide, titanium white powder, talcum powder, calcium carbonate, butyl acetate, leveling agent, organic tin and propylene glycol methyl ether acetate. The B component comprises butyl acetate, HDI trimer and isocyanate prepolymer. The C component comprises dimethylbenzene, butyl acetate, propylene glycol methyl ether acetate and dimethyl carbonate. The PU white primer has the advantages of water resistance, high temperature resistance, adhesion, adhesion, hiding power and strong flexibility, and has superior comprehensive performance, is green and safe, low in cost, and is very suitable for being used as wood and stone surface primer in kitchens, bathrooms and the like.

The application discloses a method for preparing a super-hydrophilic porous membrane by grafting SiO2 on a polyurethane fiber membrane, and comprises the following steps: preparing a N,N-dimethylformamide / butyl acetate DMF / BuAc solution of polyurethane PU to obtain PU spinning solution; the PU spinning solution is used to prepare a micron porous membrane through an electrostatic spinning device; the porous membrane is placed in a plasma treatment device, a radio frequency source is turned on, and radio frequency power and time are set; a higher chemical activity plasma is used to activate the surface of the porous membrane fiber to form grafted active groups; the surface-activated porous membrane is placed in a mixed solution of ethanol and amino silane for ultrasonic treatment; the porous membrane treated by the amino silane is placed in a mixed solution of ethanol, water and tetraethyl orthosilicate for ultrasonic treatment to obtain a super-hydrophilic porous membrane. The super-hydrophilic porous membrane prepared by the method has excellent comprehensive properties such as moisture absorption, quick drying, oil-repellence under water and oil stain resistance.

The invention discloses a protective coating for the surface of a stainless steel structure and a preparation method of the protective coating, and relates to the technical field of coatings. The protective coating comprises a bottom layer, a surface layer and a porous ceramic particle layer arranged between the bottom layer and the surface layer. Wherein the bottom layer is prepared from a bottom layer coating, and the bottom layer coating is prepared from the following raw materials: epoxy resin E-51, butyl glycidyl ether, benzyl glycidyl ether, butyl acetate, a eutectic solvent and a curing agent dispersion liquid; the surface layer is prepared from a surface layer coating, and the surface layer coating is prepared from the following raw materials: butyl acetate, xylene, epoxy resin E-51, a dispersing agent, phenyl organic silicon resin dispersion liquid, a silane coupling agent KH-560, a eutectic solvent, micron silicon carbide, porous ceramic particles, modified composite particles, fumed silica and curing agent dispersion liquid. Due to the introduction of the eutectic solvent, the porous ceramic particles, the modified composite particles and other components, the adhesive force, the water resistance, the aging resistance and the durability are effectively improved.

The application provides a UV coating and a preparation method and application thereof.The UV coating of the application is prepared from raw materials including ultraviolet light curing resin, active monomer, thermoplastic acrylic resin, photoinitiator, adhesion promoter, base material wetting agent, ethyl acetate, butyl acetate, fumed silica, polyamide wax anti-settling slurry, pigment and flatting powder.The UV coating of the application reduces the influence of pigment light absorption on UV curing by increasing UV light intensity, and realizes appropriate color addition of the coating.The application increases the color addition ratio by increasing light intensity, and the color addition and hiding property are superior to those of the prior art.The application also provides a preparation method and application of the UV coating.

The invention belongs to the field of paint, and particularly relates to PU electrostatic spraying high-wear-resistance white matt finish paint and a preparation method thereof.The PU electrostatic spraying high-wear-resistance white matt finish paint is prepared from a component A, a component B and a component C. The component A is prepared from odorless matting resin, a wetting agent, a defoaming agent, matting powder, superfine ceramic powder, an organic silicon flatting agent, an anti-settling agent, conductive titanium dioxide slurry and xylene; the component B comprises a bright tripolymer, a matte tripolymer, an HDI (hexamethylene diisocyanate) tripolymer and butyl acetate; the component C comprises trimethylbenzene, cyclohexanone, a DBE high-boiling-point solvent, butyl acetate and an alcoholic solution of an amine salt compound; the conductive titanium dioxide slurry comprises odor-free matting resin, conductive titanium dioxide, a wetting agent and xylene. By means of the superfine ceramic powder, excellent hardness, wear resistance and certain whiteness can be provided for the coating, and the chemical stability of the coating is improved. The conductive titanium dioxide slurry can achieve the electrostatic surrounding effect, and multiple surfaces of a workpiece can be evenly oiled at the same time during electrostatic spraying.

The invention provides a special PU (polyurethane) real wood paint for automotive interiors and a preparation method thereof, and belongs to the technical field of automotive interiors, the special PU real wood paint comprises a main agent, a curing agent and a diluent; the main agent is prepared from the following components in percentage by weight: 15 to 30 percent of acrylic polyol resin, 10 to 20 percent of low-hydroxyl acrylic resin, 0.5 to 1 percent of macromolecular dispersing agent, 0.1 to 0.3 percent of polyacrylate defoaming agent, 1 to 2 percent of polyethylene wax powder, 4.5 to 5.5 percent of butyl acetate, 4 to 7 percent of matt powder, 0.3 to 0.5 percent of polyether modified polymethylsiloxane flatting agent, 0.2 to 0.4 percent of drier, 1 to 2 percent of ultraviolet light absorber, 15 to 20 percent of cellulose acetate butyrate solution and the balance of ethyl acetate; the sum of the mass percentages of all the components in the main agent is 100%. The invention provides special PU (polyurethane) real wood paint for automotive trim and a preparation method of the special PU real wood paint. The purpose of improving weather resistance, touch feeling and durability of automotive trim paint is achieved.

The invention belongs to the technical field of resin coating preparation, and particularly relates to a preparation method of an antibacterial alkyd resin coating. Comprising the following steps: alcoholysis reaction: putting soybean oil, glycerol, phthalic anhydride, butyl acetate and deionized water into a reaction kettle according to a ratio, adding a catalyst, and heating to react until the alcoholysis end point is reached; esterification reaction: reducing the reaction temperature, and adding phthalic anhydride and a reflux solvent xylene; raising the temperature to carry out condensation polymerization until an esterification end point is reached; diluting and filtering: adding a prepared solvent into the reaction kettle for diluting, adjusting the viscosity, filtering and discharging for later use; the prepared nano-silver solution is slowly added into resin, then 0.5%-1% of a silane coupling agent is added, and mechanical stirring is conducted; transferring the prepared pigment grinding slurry to a paint mixing tank, and adjusting to construction viscosity by using a solvent; compared with an additive antibacterial agent, the antibacterial resin coating prepared by the invention has more stable and lasting antibacterial time and can achieve the same antibacterial effect.

The application discloses a protective coating for a stainless steel structure surface and a preparation method thereof, and relates to the technical field of coating.The protective coating comprises a bottom layer, a surface layer and a porous ceramic particle layer arranged between the bottom layer and the surface layer.The bottom layer is made of a bottom layer coating, and the bottom layer coating comprises the following raw materials: epoxy resin E-51, butyl glycidyl ether, benzyl glycidyl ether, butyl acetate, a eutectic solvent and a curing agent dispersion liquid;the surface layer is made of a surface layer coating, and the surface layer coating comprises the following raw materials: butyl acetate, dimethylbenzene, epoxy resin E-51, a dispersant, a phenyl silicone resin dispersion liquid, silane coupling agent KH-560, a eutectic solvent, micron silicon carbide, porous ceramic particles, modified composite particles, fumed silica and a curing agent dispersion liquid.The introduction of the eutectic solvent, the porous ceramic particles and the modified composite particles and other components effectively improves the adhesion, water resistance, aging resistance and durability.

The present application relates to the technical field of metal corrosion and surface treatment, and particularly relates to a cold-patching composite material for pipeline online repair and reinforcement and a use method, the composite material is composed of cold-plated aluminum coating and glass fiber cloth, the cold-plated aluminum coating is composed of the following components in percentage by mass: 25-45% of composite aromatic polyisocyanate polymer, 15-25% of composite n-butyl acetate polymer, 20-30% of aluminum powder, 5-20% of thinning agent, and the rest is synthetic resin; during preparation of the composite material, one or more than three of spraying, brushing, and rolling can be used. The present application can be used for thickening forming of the metal surface of pipeline, component and other engineering equipment, and can also be used for updating and reducing the metal plate thinning of old equipment, so as to realize thickening of the metal plate thickness of the equipment. The formula is simple, the cost of each component is low, the preparation process of the composite material is simple and operable, and the composite material has the characteristics of high bonding force, pressure resistance and corrosion resistance.

The invention discloses a novel method for extracting tylosin fermentation liquor. The method comprises the following steps: step 1, pH regulation pretreatment of the tylosin fermentation liquor; step 2, performing tubular ultrafiltration membrane filtration on the pretreated fermentation liquor; and step 3, introducing the filtrate obtained in the step 2 into an extraction separator for extraction. The tubular ultrafiltration membrane with the molecular weight cut-off of 10000 is used for replacing traditional plate frame filtration, impurities such as macromolecular protein and pigment are cut off by means of the selective separation characteristic of the membrane, and the quality of filtrate is greatly improved. High-purity filtrate is combined with butyl acetate counter-current extraction, efficient separation is achieved by means of solubility difference, the emulsification phenomenon is remarkably reduced, and the extraction yield stably exceeds 93%. The phase inversion liquid is concentrated by a nanofiltration membrane, the titer is accurately controlled to be more than 200,000 U / mL, compared with the traditional evaporation concentration, the high-temperature degradation of the tylosin is reduced, the energy consumption is reduced, and the concentration yield is more than 99%.

The invention discloses a thin-layer identification method of a smoked plum charcoal related sample, which comprises the following steps: preparing a test sample solution of the smoked plum charcoal related sample and a smoked plum reference medicinal material solution, spotting the test sample solution and the smoked plum reference medicinal material solution on the same thin-layer plate, developing by using a butyl acetate-formic acid-water mixed solution as a developing solvent, inspecting under an ultraviolet lamp, a thin-layer chromatogram is obtained, and identification operation is completed. The method is simple, convenient and rapid, is suitable for various smoked plum charcoal related samples, and is also suitable for smoked plum related samples; after expansion, a multi-information dark plum charcoal related sample thin-layer chromatogram can be obtained, spots are clear, the separation degree is good, and dark plum charcoal related samples and common counterfeit products thereof can be well distinguished. Meanwhile, compared with a pharmacopoeia method, the method has the advantages that the steps are simpler and more convenient, the identification efficiency can be effectively improved, and the method is more suitable for identifying the smoked plum charcoal-related water extract preparation.

This invention relates to the field of coating technology, specifically to an outdoor anti-aging acrylic resin coating and its preparation method. The coating comprises a grafted modified hydroxyl acrylic resin component, butyl acetate, propylene glycol methyl ether acetate, and an aliphatic hexamethylene diisocyanate trimer curing agent. The grafted modified hydroxyl acrylic resin component is prepared by introducing suspended methacrylate double bonds into hydroxyl acrylic resin via 2-isocyanoethyl methacrylate, followed by segmental grafting of hindered amine methacrylate monomers, benzotriazole methacrylate monomers, and methacryloyloxysilane-treated fumed silica. This coating can reduce the migration of light-stabilizing components and the aggregation of nanofillers, improving the gloss retention, color difference stability, chalking grade, haze stability, and flexibility retention of the coating film after outdoor aging. It is suitable for surface protection of wood, rigid PVC profiles, and flexible PVC decorative films.

The application discloses a preparation method of polymer fluorescent nanoparticles. First, a polylactic acid-polyurethane-polyacrylic acid copolymer is synthesized by reacting alcoholysis-recovered double-hydroxyl polylactic acid, 4,4'-diphenyl methane diisocyanate, polycaprolactone polyol, hydroxyethyl acrylate and acrylic acid; second, a polyethylene imine aqueous solution is prepared, and the polyethylene imine aqueous solution is added dropwise into a butyl acetate solution of the polylactic acid-polyurethane-polyacrylic acid copolymer, high-speed stirring is conducted, and a water-in-oil emulsion is formed; finally, the water-in-oil emulsion is heated, water is evaporated, a fluorescent solution is formed, and the fluorescent solution is subjected to spray drying to obtain the fluorescent nanoparticles. The nanoparticles of the paper cup are uniform in size, have excellent fluorescent performance and biocompatibility, and have a wide application prospect.

This invention discloses a helmet crackle paint spraying process. The technical solution adopted includes the following steps: Step 1: Preparation of crackle primer, mixing 45-65% acrylic resin, 5-8% cellulose acetate, 5-10% methyl isobutyl ketone, 8-10% butyl acetate, 5-8% butyl ether, 5-8% aluminum powder, and 5-10% color paste by weight, and then preparing crackle primer thinner at a dilution ratio of 1:1.1 for later use; Step 2: Preparation of crackle topcoat, mixing 3-5% acrylic resin, 10-20% cellulose acetate, 15-20% methyl isobutyl ketone, 8- Mix 10% butyl acetate, 8-10% butyl ether, 3-8% color paste, and 8-10% cracking agent, and then dilute them at a ratio of 1:0.8 to prepare cracking topcoat thinner for later use; Step 3: First, spray the cracking primer thinner prepared in step 1 evenly onto the helmet surface. After the helmet surface dries for 2-5 minutes, spray the cracking topcoat thinner prepared in step 2 evenly onto the helmet surface. After the helmet surface dries for 10-15 minutes, transfer it to an oven and bake it for 10-20 minutes in a stepped temperature increase manner, while controlling the temperature within the range of 40-80 degrees Celsius.

The invention provides a lathe machining aluminum scrap scratch resistant coating for motorcycle hubs and a preparation process thereof, and belongs to the technical field of coatings, the preparation process comprises the following steps: S1, preparing silicon-zirconium hybrid sol; step S2, preparing an epoxy modified prepolymer solution; s3, adding a hydroxy acrylic resin solution into a reaction kettle, stirring, adding butyl acetate and sec-butyl acetate, stirring, adding hexamethoxymethyl melamine, the epoxy modified prepolymer solution, BYK4510, organobentonite and propylene carbonate, stirring, adding the silicon-zirconium hybrid sol, stirring, adding BYK333, BYK-066N, polyethylene micro-powder wax and PTFE micro-powder, stirring at a reduced speed, and cooling to room temperature to obtain a coating; and finally, adding the aluminum paste mixture, uniformly mixing, and filtering to obtain the lathe machining aluminum scrap scratch resistant coating for the motorcycle hub. The coating provided by the invention can realize the purposes of scratch resistance, stripping resistance and good appearance maintenance of the coating for resisting the scratch of the lathe machining aluminum scraps for the motorcycle hub.

The invention relates to the technical field of resin, in particular to plant-based resin capable of making contact with food and a preparation method and application thereof.The plant-based resin is prepared from, by weight, 40-50 parts of soybean oil, 12-18 parts of tung oil, 20-25 parts of pentaerythritol, 5-8 parts of diethylene glycol, 3-6 parts of trimethylolpropane, 15-20 parts of maleated rosin, 20-25 parts of polylactic resin and 18-22 parts of butyl acetate. 0.1 to 0.5 part of an antioxidant and 0.01 to 0.05 part of tetrabutyl titanate. According to the plant-based resin capable of making contact with the food, by selecting the raw materials and matching the resin framework with the flexible connecting material, the mechanical performance and adhesive force of the plant-based resin are improved, and the plant-based resin can be rapidly, firmly and permanently attached to a printing stock and can be applied to ink preparation.

The invention provides an acrylic polyurethane coating composition for a wet-on-wet process and a preparation method of the acrylic polyurethane coating composition. The composition consists of a floating coat and a finishing coat, the main agent in the finish paint is prepared from the following components in parts by weight: 35 to 40 parts of hydroxypropyl resin, 1 to 3 parts of propylene glycol methyl ether acetate, 1.3 to 3.5 parts of S-100A, 1 to 3 parts of BYK163, 0.1 to 0.6 part of polyethylene wax, 0.5 to 1.4 parts of pigment yellow No.83, 3.5 to 4.5 parts of titanium dioxide, 2 to 6 parts of superfine precipitated barium sulfate, 12 to 18 parts of iron oxide yellow, 4.1 to 8 parts of butyl acetate, 14 to 18 parts of hydroxypropyl resin, 0 to 8 parts of hyperbranched polyester, 0.2 to 0.7 part of BYK358, 0.02 to 0.1 part of BYK300, 0.2 to 0.6 part of Tinuvin292, 0.6 to 1 part of Tinuvin1130 and 0.2 to 0.6 part of 10 percent DBTDL. According to the invention, the paint film meets the requirements of mechanical properties, and the overall appearance of the paint film is improved.

The present application relates to the field of high polymer, and in particular to a modified polyester resin and a preparation method thereof.The modified polyester resin is prepared from the following raw materials: odorless salad oil, castor oil, a first antioxidant, water, mixed acid, polyhydric alcohol, odorless oleic acid, phthalic anhydride, pentaerythritol, a second antioxidant, dimethylbenzene and butyl acetate.The oil is connected to soybean oleic acid, so that the branched chain provides better hardness, dryness, solvent resistance, solvent release and the like, thereby achieving the effects of anti-swelling and anti-collapse, and solving the defects of poor hole entry, easy collapse, easy swelling, strong odor and the like of the traditional PU paint resin.

The invention belongs to the technical field of solid oxide fuel cells, and discloses a solid oxide fuel cell half cell and a preparation method thereof. The problem of bending deformation of SOFC cells produced in the prior art is solved. Comprising the steps that (1) an anode supporting layer green body, an anode functional layer green body and an electrolyte layer green body are prepared respectively, a solvent F1 system is adopted for preparing the anode supporting layer green body, a solvent F2 system is adopted for preparing the anode functional layer green body, a solvent F3 system is adopted for preparing the electrolyte layer green body, and F1, F2 and F3 are solvent systems with different compositions or proportions; (2) stacking, forming layers and sintering; f1, F2 and F3 respectively and independently comprise at least one of ethanol, propanol, isopropanol, butanol, butanone, terpilenol, butyl acetate, toluene and xylene, and the three components or ratios are different. The bending degree of the half battery piece can be effectively reduced, and the production yield is improved.

The invention discloses zinc phosphate-based environment-friendly antirust aerosol paint and a preparation method thereof, and belongs to the technical field of chemical coatings. The aerosol paint is composed of a paint liquid and a propellant, wherein the paint liquid comprises the following components in percentage by mass: 15-25% of an acrylate copolymer, 5-15% of zinc phosphate, 0.2-1.0% of a decomposable polymeric dispersant, 0.5-4% of an auxiliary agent, 18-25% of a mixed solvent and the balance of a dimethyl ether propellant. The dispersing agent is an ammonium salt type polymer dispersing agent, is stable in property during liquid storage, and can effectively prevent pigment sedimentation; the paint film can be decomposed, volatilized and converted into a hydrophobic structure in the drying process, so that the early water resistance of the paint film is remarkably improved. The storage stability and construction performance of the product are further optimized through a mixed solvent of acetone, ethyl acetate and butyl acetate in a specific ratio and a two-step adding process. The aerosol paint does not contain heavy metals, and has excellent anti-rust performance, good storage stability and environmental protection property.

The application provides a method for obtaining sucralose, and relates to the technical field of chemical production, and comprises the following steps: (1) removing part of the solvent from a sucralose waste liquid by rotary evaporation, mixing with water, and then performing fractional extraction, and obtaining a concentrate and butyl acetate by rotary evaporation, and cooling the concentrate to crystallize to obtain a solid crude product and a mother liquor; (2) performing fractional recrystallization on the solid crude product to obtain a crystallization mother liquor and sucralose solid with a purity of 90-99%. The method can effectively recover sucralose from the sucralose waste liquid, and realizes the resource utilization of waste.

This application discloses an insulating, wear-resistant, superhydrophobic, and oleophobic coating for railway tracks and its preparation method, belonging to the field of functional coating technology. The coating comprises component A and component B. By weight, component A includes 100 parts of fluorosilicone resin, 0.5-1.5 parts of surface-fluorinated modified carbon nanotubes, 3-6 parts of modified nano-silica treated with fluorinated silazane, 10-15 parts of ultrafine alumina, 8-12 parts of mica powder, 5-10 parts of hollow microspheres, 0.5-1.0 parts of modified polyurethane, 0.5-1.0 parts of modified polyamide wax, 0.2-0.5 parts of silicone polyether emulsion, and 15-25 parts of a solvent formed by mixing butyl acetate and propylene glycol methyl ether acetate. Component B includes 5-10 parts of polyisocyanate curing agent. The ratio of component A to component B is 100:(3-7). The coating provided in this application has good durability and corrosion resistance. Even after long-term use, it can still maintain excellent insulation, wear resistance, and superhydrophobic and oleophobic properties, which has high economic value and broad application prospects.

The invention discloses a method for efficiently recovering sucralose from sucralose production carbon residues, which comprises the following steps: dissolving the carbon residues obtained by decoloring chlorinated liquid with activated carbon in the sucralose production process into methanol to form turbid liquid, and then adding a proper amount of ammonia water for hydrolysis; the preparation method comprises the following steps: dissolving sucralose-6-acetate in a turbid liquid, hydrolyzing the sucralose-6-acetate dissolved in the turbid liquid and other low-polarity byproducts to generate sucralose, neutralizing, filtering and concentrating hydrolysate after complete hydrolysis to obtain an aqueous solution containing sucralose, and finally purifying by conventional modes such as butyl acetate extraction, ethyl acetate extraction, crystallization and the like to obtain a crude product sucralose. According to the method, the sucralose production carbon residues are innovatively recycled, the yield of sucralose is increased, the recycling process has the advantages of being mild in reaction condition, high in recycling rate, easy and convenient to operate and the like, high-value utilization of the sucralose production carbon residues can be achieved, and remarkable economic benefits and environmental protection benefits are achieved.

The invention relates to a modified high-reflection heat-insulation surface layer coating and a preparation method of the modified high-reflection heat-insulation surface layer coating. The coating is prepared from the following raw material components: 20 to 30 parts of acrylic resin, 20 to 30 parts of hyperbranched modified acrylic resin, 15 to 20 parts of titanium dioxide, 15 to 20 parts of electroless refrigeration powder, 5 to 20 parts of infrared reflection pigment, 5 to 10 parts of xylene, 5 to 10 parts of butyl acetate, 5 to 10 parts of ethyl acetate, 0.5 to 1 part of dispersing agent, 0.5 to 1 part of organic rheological agent and 0.1 to 0.5 part of fumed silica. The reflective heat-insulating and refrigerating surface coating has the advantages of high sunlight reflectivity, high hemispherical reflectivity, high near-infrared reflectivity and the like, and also has high weather resistance. The preparation method of the reflective heat-insulation refrigeration surface layer coating is simple in process and suitable for industrial production; the paint is suitable for the container body equipment facility coating process and flow, and the field construction efficiency is high.

This application relates to the field of marine-drifted polystyrene foam remediation technology, specifically disclosing a composite solvent and method for dissolving marine-drifted polystyrene foam. The composite solvent comprises the following components by mass percentage: 70%–79% main solvent, 12%–20% demulsifier, 6%–9% water-soluble shielding salt additive, and 1%–3% amphiphilic encapsulating agent; the main solvent is a mixture of sec-butyl acetate and isoamyl 2-methylbutyrate. The main solvent rapidly dissolves polystyrene, the demulsifier prevents the main solvent from emulsifying upon contact with water, the shielding salt additive complexes salt ions and enters the aqueous phase to prevent salt ions from mixing into the polystyrene, and the encapsulating agent encapsulates solid impurities and enters the aqueous phase to prevent solid impurities from mixing into the polystyrene. The synergistic effect of the four components allows the composite solvent to directly treat marine-drifted polystyrene foam with high water and high salt content, and the recycled material meets product performance requirements.