88 results about "Ethyleneglycol monobutyl ether" patented technology

The invention belongs to the technical field of alkane processing, and particularly relates to a process for preparing isopentene by dehydrogenation of isopentane, a catalyst and a tert-amyl alcohol preparation process. The process for preparing isopentene by dehydrogenation of isopentane comprises an isopentane dehydrogenation device and an isopentene separation device, in the isopentane dehydrogenation device, a dehydrogenation reactor is a fixed bed adiabatic reactor and is filled with a Pt-Sn-K / alumina type alkane dehydrogenation catalyst, the catalyst has hydromethanation performance under the CO2-containing dehydrogenation reaction condition, and the arrangement and operation of a dehydrogenation reactor group comprise a mode A, a mode B or a mode C; the isopentene separation device comprises a cooling separation system, a pressure swing adsorption separation system and an optional rectification system. The tert-amyl alcohol is further prepared from isoamylene under the conditions of a fixed bed hydration reactor, ethylene glycol monobutyl ether and other solvents, and the tert-amyl alcohol product is obtained through separation. The process is superior to the prior art on the whole, and has certain application prospects.

The invention relates to the technical field of PVB (polyvinyl butyral) films, in particular to a full-wave-band heat-shielding modified PVB composite film as well as a preparation method and application thereof. The full-band heat shielding modified PVB composite film provided by the invention is of an asymmetric structure and comprises a modified PVB matrix and a heat shielding coating covering one side of the modified PVB matrix, the modified PVB matrix is prepared from the following components: polyvinyl butyral and an epoxy silane coupling agent; the heat shielding coating comprises the following components: CsWO3 nano powder, ZnO nano powder, water-based acrylic resin and a composite dispersion system; the composite dispersion system comprises triethylene glycol di-2-ethylhexoate, polyvinylpyrrolidone and diethylene glycol monobutyl ether. The full-wave-band heat shielding modified PVB composite film provided by the invention can realize 780-2500nm full-wave-band near-infrared high-efficiency barrier, improve the binding force and performance stability of a heat shielding coating, and meet the production requirements of light weight, environmental protection and industrialization at the same time.

The invention belongs to the technical field of paint removers, and discloses a high-efficiency and environment-friendly paint remover as well as a preparation method and a paint removal method thereof. The paint remover comprises a main solvent, a cosolvent, a surfactant and a thickening agent, the main solvent comprises diethylene glycol monobutyl ether, the cosolvent comprises glycerol and propylene glycol carbonate, the surfactant comprises an anionic surfactant and a nonionic surfactant, and the thickening agent comprises an anionic surfactant and a nonionic surfactant. The non-ionic surface active agent comprises sorbitan fatty acid ester and an organic silicon surface active agent, and the thickening agent comprises xanthan gum and a nanometer aluminum oxide solution. The paint remover does not contain dichloromethane, is low in toxicity and environment-friendly, can quickly swell and strip high polymer molecules of a paint film, thoroughly destroy the adhesive force of the paint film to a substrate and remove the paint film through selective and matched use of specific components, does not cause any corrosion and adverse effect on an aluminum alloy substrate, and is suitable for industrial production. Residues of the depainted base material can be quickly cleaned away, and the phenomena of blackening or whitening and the like are avoided.

The invention discloses piperonyl butoxide and a preparation method thereof. The preparation method comprises the following steps: carrying out mixing reaction on dihydrosassafras oil, acetyl chloride and trioxymethylene in the presence of concentrated hydrochloric acid; after the reaction is finished, chloromethyl material reaction liquid is obtained; mixing and reacting the chloromethyl material reaction liquid with sodium hydroxide and diethylene glycol monobutyl ether to obtain a product containing piperonyl butoxide. According to the preparation method of piperonyl butoxide, the dihydrosassafras oil, acetyl chloride and trioxymethylene are subjected to chloromethylation reaction in the presence of a small amount of concentrated hydrochloric acid, so that the use of a large amount of concentrated hydrochloric acid in the traditional process is avoided, and the problem of waste acid generated in the chloromethylation reaction process is solved; and meanwhile, the content of piperonyl butoxide in the product can be increased, and the content of piperonyl butoxide is ensured to be greater than 98%.

The present invention relates to a composite boron powder and a preparation method thereof. The composite boron powder is prepared by a secondary condensation method using a vinylidene fluoride / propylene alcohol copolymer as a compounding agent, a polyethylene glycol monobutyl ether acrylate / acrylonitrile / allylamine / hydroxyethyl acrylate copolymer as an auxiliary compounding agent, an epoxy resin as a high-strength composite adhesive, and diethylenetriamine as a curing agent. The amounts of the components are based on the mass of the boron powder: the mass of the vinylidene fluoride / propylene alcohol copolymer is 1-2% of the mass of the boron powder, the mass of the polyethylene glycol monobutyl ether acrylate / acrylonitrile / allylamine / hydroxyethyl acrylate copolymer is 0.3-1% of the mass of the boron powder, the mass of the epoxy resin is 2-3% of the mass of the boron powder, and the mass of the diethylenetriamine is 0.15-0.4% of the mass of the boron powder.

The invention relates to the technical field of waste gas treatment, and particularly discloses waste gas treatment liquid for treating large-air-volume low-concentration waste gas through a water-based method. The waste gas treatment liquid for treating the large-air-volume low-concentration waste gas through the water-based method comprises a surfactant, a defoaming agent, a dissolution accelerant and water. Wherein the surfactant can be selected from any one or more of polyoxyethylene alkyl ether, polyoxyethylene alkyl ether and polyoxyethylene fatty acid ester; the dissolution accelerant can be selected from any one or more of ethylene glycol monobutyl ether, diethylene glycol monobutyl ether and triethylene glycol monobutyl ether; the defoaming agent is any one or more of butanol, dimethyl silicone oil, silicone and polyether modified polysiloxane. When the waste gas absorption liquid obtained in the invention is used for treating waste gas, the absorption efficiency of methanol, butanol, benzene, toluene, xylene, ethyl acetate, dichloromethane and acetone is obviously improved, and the absorption efficiency of the waste gas absorption liquid on aromatic hydrocarbon, halogenated hydrocarbon, alcohol, ketone and ester pollutants is improved.

The invention relates to the technical field of ink-jet ink, in particular to dye-type ink-jet ink as well as a preparation method and application thereof. Compared with the prior art, the invention has the following beneficial effects: glycerol plays a moisturizing role, triethylene glycol plays an anti-freezing role, triethylene glycol monobutyl ether plays a role of a penetrant, triethanolamine is used as a pH value regulator and a cosolvent, and the leveling agent, the lubricant and the silicone oil play a role of a surfactant. According to the invention, through reasonable matching of the components and control of performance parameters such as pH value, conductivity, surface tension, viscosity and the like, the obtained dye-type ink-jet ink has small color difference with OEM ink, and the cost is low.

The present invention discloses an environmentally friendly water tank fountain solution and a preparation method thereof, relating to the technical field of fountain solution preparation. The fountain solution comprises, by mass percentage, 3% to 10% ethylene glycol monobutyl ether, 0.5% to 3% ethylene glycol tert-butyl ether, 0.8% to 5% 1,2-propylene glycol, 0.1% to 0.5% sodium citrate, 10% to 91% purified water, and 0.1% to 0.5% defoaming agent. The environmentally friendly water tank fountain solution of the present invention has simple components, high stability, and is environmentally friendly. It also has the characteristics of low surface tension, good wettability, good antibacterial properties, and zero alcohol, thereby ensuring printing effects and printing quality.

The present application belongs to the technical field of cleaning products, and particularly relates to a high-temperature oil stain removing stove cleaner as well as a preparation method and application thereof. The high-temperature oil stain removing stove cleaner provided by the present application comprises the following components and mass fractions: 11-33 parts of an alkaline additive, 1-2 parts of hydroxyethylidene diphosphonic acid, 3-6 parts of a non-ionic surfactant, 4-8 parts of a solvent, 1-3 parts of a solubilizer, 1-3 parts of sodium xylene sulfonate, and 45-79 parts of water; the solvent comprises ethylene glycol monobutyl ether and diethylene glycol ethyl ether. The high-temperature oil stain removing stove cleaner provided by the present application has the advantages of simple cleaning method, high-temperature oil removing effect, good stain removing and oil scale removing effect on commercial kitchen utensils, high safety, no corrosion to metal, simple raw material composition, and no need to add a defoaming agent.

The application discloses a non-oxidative weak-acid polyacrylamide degrading agent and a preparation and use method thereof, and the degrading agent comprises the following components: a reducing agent, a regulator, a mutual solvent and water; the reducing agent is one of 3-O-ethyl ascorbic acid ether and L-ascorbic acid-2,6-dibutyrate; the regulator is ammonium chloride; and the mutual solvent is one of ethylene glycol monobutyl ether and isopropyl alcohol. The problems that the existing degrading agent needs to be isolated by a plug for redox reaction with subsequent injected mud acid or secondary precipitation is caused by metal ions such as Na + , K + , Fe 2+ and the like in the degrading agent and subsequent injected mud acid are effectively solved.

An ink includes: a pigment, a pigment dispersion resin, 7 mass % or more and 20 mass % or less of polyethylene glycol having a molecular weight of 200 or more and 600 or less, 1 mass % or more and 15 mass % or less of 3-methyl-1,5-pentanediol, 1 mass % or more and 10 mass % or less of triethylene glycol monobutyl ether, and water.

The invention relates to the technical field of colored ribbon spraying agents, in particular to a low-temperature-resistant environment-friendly colored ribbon spraying agent and a preparation method thereof. The invention relates to a low-temperature-resistant environment-friendly colored ribbon spray, which is prepared from 20 to 30 parts of deionized water, 0.2 to 0.4 part of preservative, 0 to 0.3 part of water-soluble pigment, 0.1 to 0.2 part of coconut oil diethanolamide, 0.1 to 0.2 part of perfluorooctyl quaternary ammonium iodide, 0.1 to 0.2 part of rhamnolipid, 0.1 to 0.2 part of sodium vinylsulfonate, 4 to 6 parts of ethanol, 15 to 25 parts of filling powder, 5 to 8 parts of acrylic resin, 5 to 7 parts of ethylene glycol monobutyl ether and 20 to 30 parts of propellant. The colored ribbon spraying agent successfully solves the problem that an existing colored ribbon spraying agent is instable in spraying under the low-temperature condition, and the excellent spraying effect is still kept in the cold environment.

The invention discloses a photomagnetic response type deep eutectic solvent for absorbing acrylonitrile and a preparation method thereof, the photomagnetic response type deep eutectic solvent comprises a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond donor is one of triethylene glycol monobutyl ether (TGBE), N-methyl pyrrolidone (NMP), triethylene glycol (TEG) and triethanolamine (TEOA); the hydrogen bond acceptor is one of tetraethylene glycol dimethyl ether (TGDE) and sulfolane (SUL). The ether bond is used as a hydrogen bond acceptor region, the hydroxyl is used as a hydrogen bond donor region, a negative electricity region of the ether bond and a positive electricity region of acrylonitrile form a hydrogen bond, a wide van der Waals force is formed between a non-polar region of TGBE and acrylonitrile, and the whole absorption efficiency is synergistically improved with the hydrogen bond effect of TGDE. In addition, the fluidity of the solvent is remarkably improved due to the low viscosity of the ethers, and mass transfer limitation caused by high viscosity is avoided, so that the ethers have excellent performance in a continuous absorption tower.

The invention discloses a liquid-liquid phase change absorbent for capturing carbon dioxide, and belongs to the technical field of carbon capture, the absorbent comprises an absorption component and a solvent component, the absorption component comprises N, N-dimethylethanolamine and 2-methylaminoethanol, the solvent component comprises triethylene glycol monobutyl ether and water, and the solvent component comprises a solvent component and a solvent component. The phase change absorbent is a homogeneous solution before absorbing CO2 and is divided into an upper liquid phase and a lower liquid phase after absorbing CO2 to be saturated, and CO2 is enriched in a lower water phase. According to the absorbent, the volume of a rich phase needing to be regenerated is greatly reduced through phase separation, and the energy consumption in the regeneration process can be effectively reduced, so that the defects of a traditional organic amine absorption method are effectively overcome. In addition, the method has the advantages of high absorption load, high absorption rate, short phase splitting time, high CO2 enrichment degree, high regeneration efficiency, low regeneration energy consumption, low saturated solution viscosity and the like, and has a wide industrial application prospect.

The invention discloses a sodium ion battery thermal runaway flame-retardant cooling agent based on free radical annihilation-phase change phagocytosis. The sodium ion battery thermal runaway flame-retardant cooling agent is prepared from the following raw materials in percentage by mass: 35 to 40 percent of TEP, 18 to 22 percent of DMMP, 13 to 16 percent of DME, 10 to 15 percent of PMMA microcapsule ADP, 4 to 6 percent of perfluorohexanone, 3 to 5 percent of TEGDME, 2.5 to 3.5 percent of anticorrosive agent, 1.0 to 1.8 percent of perfluoropolyether surfactant, 0.8 to 1.2 percent of diethylene glycol monobutyl ether, 0.8 to 1.2 percent of nano SiO2, 0.3 to 0.7 percent of PIBSI and 0.01 percent of polyether modified silicone oil. The invention also provides a preparation method of the flame-retardant coolant. According to the flame-retardant coolant, the free radical concentration is reduced by more than 98% through low-pressure atomization spraying in the early stage of thermal runaway (130-160 DEG C), and meanwhile, temperature irreversible pressing is realized, so that combustion starting is blocked from the source.

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.

This invention relates to the field of screen printing ink technology, specifically to an IMD injection molded mirror metallic screen printing ink and its preparation method. The ink is a two-component system: Component A contains a resin liquid composed of polyvinyl butyral, nitrocellulose, modified polyester resin, and polyarylate resin, flake aluminum silver powder, and additives; Component B is a phthalic diisocyanate polymer. Ethylene glycol monobutyl ether is the main solvent, ketones / esters / aromatic hydrocarbons are prohibited, and it has no corrosive effect on polycarbonate. The mass ratio of aluminum silver powder to resin solids is controlled at 0.6:1-1.2:1. The process involves preparing the resin liquid and dispersing the aluminum silver powder and additives, followed by degassing and filtration to obtain component A; before use, component B is pre-diluted with ethylene glycol monobutyl ether, added dropwise at a low shear rate of A:B = 100:8-12, and cured. The resulting ink exhibits high mirror gloss and clarity, high-temperature adhesion resistance, and MEK wiping resistance. Under IMD injection molding conditions, it demonstrates excellent consistency in appearance and structure, making it suitable for bright silver mirror-like decoration.

The invention belongs to the technical field of coatings, and discloses an excimer UV (ultraviolet) coating and a preparation method thereof. The primer is prepared from the following raw materials in parts by weight: 15 to 30 parts of thermoplastic acrylate A, 15 to 30 parts of thermoplastic acrylate B, 5 to 10 parts of butyl acetate, 10 to 15 parts of ethyl acetate, 5 to 10 parts of isopropanol, 5 to 10 parts of n-butyl alcohol, 5 to 10 parts of ethylene glycol monobutyl ether and 1 to 2 parts of silicon dioxide matting powder; the finish paint is prepared from the following raw materials in parts by weight: 20 to 40 parts of UV (Ultraviolet) type four-functional polyurethane acrylate, 10 to 20 parts of UV type two-functional polyurethane acrylate, 0 to 10 parts of UV type six-functional polyurethane acrylate, 0.5 to 1 part of Omnirad 184 photoinitiator, 0.5 to 1 part of TPO (Thermoplastic Polyolefin) photoinitiator, 1 to 2 parts of ultraviolet light absorber, 0.5 to 1 part of ultraviolet light stabilizer, 0.2 to 0.5 part of dispersing agent, 0.5 to 1 part of flatting agent and 1 to 3 parts of silicon dioxide matting powder. 1-3 parts of an anti-settling agent, 5-10 parts of butyl acetate, 10-15 parts of ethyl acetate, 5-10 parts of isopropanol, 5-10 parts of n-butyl alcohol and 5-10 parts of ethylene glycol monobutyl ether.

The invention discloses a pour point depressant suitable for conveying crude oil and a preparation method and application thereof, and belongs to the technical field of oil field chemicals. The pour point depressant comprises a first component, a second component, a third component and a fourth component, the first component is one or more of polyoxyethylene fatty alcohol ether, polyoxyethylene fatty alcohol ester and alkylphenol polyoxyethylene ether, and the molecular weight of the first component is 600-1600; the second component is a covalent grafting product of graphene oxide and a terpolymer of oleic acid, long-chain alpha-olefin and methacrylamide, and the molecular weight of the second component is 3000-8000; the third component is a composite product of nano silicon dioxide and a terpolymer of acrylate, fumaric acid and vinyl acetate, and the molecular weight of the third component is 3000-5000; and the fourth component is one or more of sorbitan fatty acid ester, a polyisobutylene succinic anhydride derivative and ethylene glycol monobutyl ether. The problem of poor timeliness of a single-component pour point depressant is solved, and the performance timeliness of the product is remarkably improved, so that the pour point depressant meets the conveying requirement.

The present application provides a kind of binder for binder jetting additive manufacturing, preparation method and use method. Polyvinylpyrrolidone is used as base material for consolidating metal powder, ethylene glycol is used as humectant to improve the wettability of the binder on the surface of metal powder, ethylene glycol monobutyl ether is used as leveling agent to reduce the surface tension of the binder, 2-pyrrolidone is used as stabilizer to maintain the chemical uniformity and stability of the binder, deionized water is used as solvent, by using different average molecular weight polyvinylpyrrolidone mixture as base material, both the flow permeability of the binder and the strength of the green body obtained by printing are ensured. Further, soluble salt copper acetate and metal organic framework material MOFs are added to the binder, MOFs are used to adsorb free copper ions to dissolve more copper acetate in the binder, copper acetate is decomposed into nanoparticles at high temperature, which effectively improves the density of the final sintered part, and avoids the problem of nozzle blockage.

The application discloses an electronic projection plate surface and a preparation method thereof, and relates to the field of color-coated plates. The electronic projection plate surface comprises a substrate layer, a primer layer and a topcoat layer, the topcoat layer is obtained by drying and curing polyester topcoat, the polyester topcoat is prepared from polyester resin, amino resin, titanium white powder, fumed silica, acid catalyst, wax powder, leveling agent, dispersant and mixed solvent in a specific proportion, the polyester resin has a suitable weight average molecular weight and hydroxyl value, the acid catalyst is a combination of different closed acid catalysts, and the mixed solvent is composed of ethylene glycol monobutyl ether, DBE, propylene glycol methyl ether acetate, trimethylbenzene and tetramethylbenzene in a specific proportion. The application improves the leveling problem of the polyester topcoat by specific selection of the polyester resin and the acid catalyst, control of the dosages of the components, combination of the mixed solvent with a specific composition and a polyester topcoat step-by-step drying process, prevents the orange peel problem of the electronic projection plate surface and does not cause surface defects such as shrinkage holes.

The application discloses a kind of high-efficiency environmental protection powder metallurgy method, by adding solidifying agent of specific formula to metal powder, significantly improve green strength and optimize sintering performance.The solidifying agent includes by mass percentage: polyethyleneimine 10-15%, isopropanol 15-25%, ethylene glycol monobutyl ether 25-35%, hydroxyethyl cellulose 0.3-2%, the rest is water, 0.1-1% metal nitrate can also be added to generate nano-enhanced phase in situ.Polyethyleneimine in solidifying agent and hydroxyethyl cellulose form three-dimensional network structure by hydrogen bond and coordination bond, so that green bending strength is 2-3 times higher than traditional process.Implementing high hard surface, high toughness core performance by using ultrasonic assisted mixing solvent during preparation, combined with gradient addition strategy.During sintering process, isopropanol and ethylene glycol monobutyl ether are volatilized in stages, PEI and HEC are completely decomposed into gas at 400-600 DEG C, and the residue is low and does not need to be degreased.

The invention discloses a tubing crude oil pour point depressant and a preparation method and application thereof, and belongs to the technical field of oilfield chemicals. The pour point depressant comprises a first component, a second component, a third component and a fourth component, the first component is a terpolymer of ethylene, acrylate and vinyl acetate; the second component is an amination product of a quadripolymer of maleic anhydride, vinyl imidazole, acrylamide and methacrylate; the third component is a polyether compound of ethylene oxide, propylene oxide and Guerbet alcohol; and the fourth component is one or more of polymethylsilsesquioxane, sorbitan fatty acid ester, a polyisobutylene succinic anhydride derivative and ethylene glycol monobutyl ether. The problem of limitation of a single-component pour point depressant is solved, so that the pour point depressant is wider in application range, the condensation point of crude oil is remarkably reduced, the low-temperature fluidity of the crude oil is effectively improved, and the high-condensation-point crude oil is convenient to exploit and transport.

This invention belongs to the field of inorganic cementitious materials technology, and discloses a magnesium oxysulfate gel modifier and its modified gel preparation method. The modified magnesium oxysulfate gel contains silica fume, organosilicon waterproofing powder, humic acid, functional additives, nanocomposite particles, sucrose, and ethylene glycol monobutyl ether. After modification, the mechanical strength of the magnesium oxysulfate gel is improved, and its fire resistance, environmental resistance, and antibacterial properties fully meet the standards, solving the pain points of traditional magnesium oxysulfate materials. It can be used in building components such as fireproof door core panels, firewalls, and fireproof partitions. Fireproof door panels made using the modified gel achieve a fire resistance limit of Class A, with improved interfacial bonding strength, excellent impact resistance and weather resistance, and are suitable for multiple scenarios. The entire process is free of VOCs exceeding the standard, and combustion produces no toxic gases, meeting green building material standards and contributing to the development of ultra-low energy consumption buildings. It is suitable for low-temperature and frigid regions, high-temperature industrial environments, high-humidity antibacterial scenarios, and projects with high environmental protection requirements. It constructs a four-dimensional innovation system of "nanoparticle micro-enhancement - functional additive environmental adaptation - traditional component performance optimization - door panel structure synergy", realizing integrated performance improvement of "materials - core panels - door panels".

The invention belongs to the technical field of oil exploitation, and particularly relates to a composite blocking remover and a preparation method and application thereof. The composite blocking remover comprises the following components in percentage by weight, comprising the following components in percentage by weight: 5 to 8 percent of hydrochloric acid, 1 to 3 percent of fluoboric acid, 0.5 to 2 percent of acetic acid, 0.5 to 1 percent of dodecyl trimethyl ammonium chloride, 0.1 to 0.3 percent of potassium chloride, 0.3 to 0.8 percent of sodium erythorbate, 0.2 to 0.5 percent of tetrasodium glutamate diacetate, 1 to 2 percent of ethylenediamine tetraacetic acid, 0.1 to 0.2 percent of inositol hexaphosphate, 0.1 to 0.2 percent of cocoanut fatty acid diethanolamide, 0.3 to 0.5 percent of sodium dodecyl benzene sulfonate, 0.3 to 0.5 percent of dimethyl diallyl ammonium chloride, 0.1 to 0.2 percent of ethylene glycol monobutyl ether and the balance of water. The composite blocking remover provided by the invention does not generate the problem of secondary precipitation, slows down the reaction speed of acid rocks, effectively pushes a blocking removal measure solution into the deep part of a stratum, enlarges the blocking removal radius, realizes deep treatment of the stratum, improves the acidification effect, and prolongs the effective action time of acidification.

The invention relates to the technical field of stainless steel surface treatment. The invention relates to a stainless steel electrolytic polishing solution suitable for EBSD sample preparation and operating conditions thereof, and the polishing solution comprises the following components by volume percent: (1) 8-15% of perchloric acid (HClO4); (2) 60%-70% of ethanol (C2H5OH); (3) 15%-25% of ethylene glycol monobutyl ether (C6H14O2); (4) 2% to 4% of sodium citrate (C6H5Na3O7); and (5) 1%-3% of distilled water (H2O). According to the invention, ethylene glycol monobutyl ether and a sodium citrate reagent are creatively adopted to jointly depassivate, in the electrolytic polishing sample preparation process of the EBSD test, the use effect is good, a deformation disturbance layer caused by mechanical polishing can be effectively removed, the surface is bright and flat, the defects of corrosion pits and the like are avoided, and the EBSD test requirements of stainless steel are completely met.

The invention provides dye type black ink-jet ink as well as a preparation method and application thereof, and belongs to the field of ink-jet ink. Comprising the following components in percentage by mass: 22-23% of black color paste, 15% of glycerol, 2-3% of triethylene glycol, 6-8% of triethylene glycol monobutyl ether, 0.4-0.6% of a bacteriostatic agent, 0.7-1% of triethanolamine, 5% of urea, 0.5% of a flatting agent, 1% of a lubricating agent, 0.05-0.1% of silicone oil and the balance of water. In order to reduce the cost, the dye-type black ink-jet ink obtained by screening proper solvents, surfactants and other substances and controlling the pH value, conductivity, surface tension, viscosity and other performance parameters is used as general dye-type ink.

This invention relates to a method for preparing yttrium oxide with a large specific surface area. The method includes the following steps: S1, dissolving yttrium salt and adding tetramethylammonium hydroxide to precipitate; S2, washing with distilled water and centrifuging to dehydrate; S3, washing with ethanol and dehydrating; S4, adding diethylene glycol monobutyl ether and mixing evenly to form a paste; S5, calcining the paste formed in step S4 at a low temperature to form a powder; S6, adding anhydrous ethanol to the powder obtained in step S5 and ball milling; S7, drying. This invention uses tetramethylammonium hydroxide for precipitation, whose spatial structure reduces agglomeration. After washing, multiple washes with ethanol remove moisture, and then diethylene glycol monobutyl ether solution is added to form a paste, further reducing agglomeration during calcination. The calcination temperature is only 600-750℃, which is energy-saving and environmentally friendly. During ball milling, anhydrous ethanol is added, eliminating moisture during the process and reducing agglomeration. The yttrium oxide prepared by this method has a specific surface area of ​​100-200 m² / g. 2 / g.

The present invention belongs to the field of fuel-rich propellants for solid ramjet engines and provides a powder propellant comprising the following components in the following mass ratios: a binder system: 3% to 5%; a boron powder surface modifier: 1.2% to 3%; a fuel: 88% to 92%; and an auxiliary metal fuel: 3% to 5%. The fuel is boron powder with a particle size of 0.6 to 1.5 μm. The boron powder surface modifier comprises a main modifier and an auxiliary modifier, wherein the main modifier is a vinylidene fluoride / propylene alcohol copolymer with a molecular weight of 2000 and its mass percentage in the powder propellant is 1 to 2%. The auxiliary modifier is a copolymer of polyethylene glycol monobutyl ether acrylate / acrylonitrile / allylamine / propylene alcohol / hydroxyethyl acrylate and its content in the powder propellant is 0.2 to 1%. The auxiliary metal fuel is magnesium and / or aluminum. The binder system comprises a binder and a curing agent, wherein the binder is a modified epoxy resin and the curing agent is diethylenetriamine.

To provide a water-based emulsion adhesive mainly composed of a vinyl acetate-based polymer exhibiting good adhesiveness to water-repellent paper.SOLUTION: There is provided a water-based emulsion adhesive which comprises 0.3 to 5.0 pts.mass of an acrylic polymer containing an amino group, 5 to 20 pts.mass of a polyvinyl alcohol and 10 to 30 pts.mass of a plasticizer selected from the group consisting of triacetin, a diethylene glycol butyl ether acetate, diethylene glycol monoethyl ether acetate, an ethylene glycol monobutyl ether acetate, 3-methoxybutyl acetate and a propylene glycol monomethyl ether acetate, based on 100 pts.mass of a vinyl acetate-based polymer containing no ethylene group as a structural unit.SELECTED DRAWING: None