91 results about "Dibutyl phthalate" patented technology

The invention belongs to the field of conductive paste preparation, and particularly discloses conductive paste containing ruthenium oxide and a preparation method of the conductive paste. The conductive paste is prepared from the following components in percentage by mass: 40 percent to 50 percent of ruthenium oxide, 3.8 percent to 5 percent of carbon nano tubes, 5 percent to 10 percent of PbO-B2O3-SiO2, 3 percent to 8 percent of ethyl cellulose, 21 percent to 28 percent of terpilenol, 9 percent to 12 percent of butyl carbitol, 0.7 percent to 1 percent of ammonium polyacrylate and 1 percent to 2 percent of dibutyl phthalate. According to the preparation method, ruthenium oxide is activated in vacuum, a mixed solvent is combined after dispersion, and a ball milling and ultrasonic dispersion synergistic process is adopted, so that the slurry is uniformly dispersed and has excellent stability. According to the invention, a ruthenium oxide-carbon nanotube-frit ternary synergistic system is constructed, and terpilenol and butyl carbitol in a specific mass ratio are taken as a mixed solvent, so that the problems of insufficient conductivity and easy agglomeration of traditional paste are effectively solved, and the method can be widely applied to manufacturing of high-precision electronic devices.

The invention discloses a rhodococcus ruber WM-5 strain, and the preservation number of the rhodococcus ruber WM-5 strain is CCTCC (China Center for Type Culture Collection) NO.M2025874. Research shows that the rhodococcus ruber WM-5 strain has the functions of resisting cadmium and degrading phthalic acid ester, has extremely high degradation efficiency on DBP (dibutyl phthalate), and is relatively wide in suitable degradation condition range; the Rhodococcus ruber WM-5 strain has strong tolerance to Cd < 2 + > and PAEs, when the Rhodococcus ruber WM-5 strain is applied to PAEs polluted solution systems under the condition of different initial concentrations of PAEs and Cd-PAEs composite polluted solution systems with different initial concentrations of Cd < 2 + >, high PAEs degradation efficiency can be maintained, and technical support is provided for remediation of Cd-PAEs composite pollution. In a word, the invention makes up the technical blank of Cd-resistant PAEs degrading strains, and the Rhodococcus ruber WM-5 strain or the microbial agent thereof has great application value in the aspects of degrading phthalate and repairing Cd-PAEs composite pollutants.

The invention discloses mongolian mongolian yeast and an application thereof. Relates to the technical field of fermentation. The invention provides a specific strain and application thereof in tobacco leaves. According to the tobacco leaf extracting solution fermented by the bacterial strain, the content of esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate, dihydroactinidiolide, dibutyl phthalate, 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and methyl palmitate is remarkably increased, and the content of the esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate, dihydroactinidiolide, dibutyl phthalate, 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and methyl palmitate is remarkably increased; three novel ester substances with fruit fragrance, rosin and other characteristic fragrances are newly generated, and the overall fragrance style is remarkably enhanced. It is shown that the aroma-producing caribeckia mongolica yeast MC-5 fermented tobacco leaf extracting solution has good aroma-producing capacity, and through the combined effect of enzymolysis and fermentation, the aroma-producing caribeckia mongolica yeast MC-5 fermented tobacco leaf extracting solution is expected to play an important application value in the field of quality improvement and aroma enhancement of tobacco leaf raw materials.

The invention discloses a high-stability MEMS hydrogen sensor and a preparation method thereof. The high-stability MEMS hydrogen sensor is a semiconductor resistance type hydrogen sensor based on a metal oxide gas sensitive coating and sequentially comprises a silicon nitride supporting layer, a Pt / Ti heating electrode, a sensing electrode, a silicon nitride isolating layer and a metal oxide gas sensitive film from bottom to top. The metal oxides are high-purity antimony doped tin dioxide, tetraamino palladium nitrate and tetraammineplatinum nitrate. The preparation method comprises the following steps: mixing high-purity antimony-doped tin dioxide powder, tetraamino palladium nitrate powder and tetraammineplatinum nitrate powder, preparing gas-sensitive slurry from a mixed solution of terpilenol, diethylene glycol butyl ether acetate, ethyl cellulose, dibutyl phthalate and dioctyl phthalate, dispensing the gas-sensitive slurry on a central interdigital electrode area of an MEMS chip, and performing vacuum drying to obtain the gas-sensitive MEMS chip. And performing vacuum standing and slow heating to obtain the sensor. The sensor is low in detection lower limit and stable in resolution ratio after high-humidity aging.

A preparation method and application of a flexible iron carbonyl inverted pyramid metamaterial thin film, which relate to the preparation method and application of electromagnetic absorption metamaterials. It is intended to solve the technical problems of the existing metamaterials having fixed functions after processing and narrow absorption frequency bands at a fixed thin thickness. The method includes: adding iron carbonyl powder, dibutyl phthalate, and tributyl phosphate into a PVB binder to prepare a slurry; then casting and drying the slurry on a glass substrate to obtain a cast film; laminating the cast films and engraving periodic units, and then laminating and assembling the periodic units into an inverted pyramid structure to obtain a metamaterial thin film. A film of about 2 mm is directly attached to a metal plate to form an electromagnetic absorption flat component, and its absorption bandwidth covers about 12.4 GHz - 18.5 GHz; the film is bent and covered on the metal plate with an air layer of adjustable thickness, realizing dual-frequency absorption at about 6.8 GHz and 14.5 GHz. This multifunctional thin film can be used in the field of wave absorption.

This invention discloses a method for preparing and analyzing trans-4-aminocyclohexylacetic acid. The preparation method is as follows: 4-nitrophenylacetic acid undergoes catalytic hydrogenation in a solvent, followed by filtration. The filtrate is then treated with acid to obtain a 4-aminophenylacetic acid salt solution. The collected catalyst is activated. The 4-aminophenylacetic acid salt solution is mixed with isopropanol, barium hydroxide, tetrabutylammonium bromide, 18-crown ether-6, and dibutyl phthalate. The activated catalyst is then added to initiate a catalytic hydrogenation reaction. After the reaction, the reaction solution is cooled and filtered. The resulting solid is mixed with a preheated dilute sulfuric acid solution and stirred to form a slurry. The mixture is then filtered, and the filtrate is neutralized and filtered again. The collected filtrate is concentrated and crystallized. The crystallized precipitate is washed and dried to obtain trans-4-aminocyclohexylacetic acid. The method provided by this invention has high reaction efficiency, mild conditions, and is suitable for industrial production. It yields high product purity and reliability. Furthermore, the analytical method provided by this invention is accurate and reliable.

The invention relates to a microbial agent for degrading COD (Chemical Oxygen Demand) in DBP (Dibutyl Phthalate) wastewater as well as a preparation process and application of the microbial agent. The microbial agent is prepared from the following active components in parts by weight: 88 to 91 parts of pseudomonas, 5.2 to 5.6 parts of enterobacter and 0.05 to 0.11 part of alcaligenes. According to the application, a plurality of microbial strains are formed in the microbial liquid which is subjected to mixed domestication culture of the DBP wastewater, the anaerobic sludge, the hydrolytic acidification bacteria and the nutritive salt, and a plurality of microbial strains in the microbial agent which is obtained by mixing the microbial liquid after bacteria screening and expanding culture have a synergistic effect, so that the microbial agent has the performance of efficiently degrading COD in the DBP wastewater in an environment-friendly manner.

The invention discloses a method for improving wettability of conductive silver paste for a crystalline silicon solar cell and application of the method, and belongs to the technical field of conductive silver paste. According to the conductive silver paste, organic solvents in different proportions are subjected to volatility testing at the temperature of 60-220 DEG C, the proportion of the organic solvents with layered volatilization is selected, a contact angle instrument is used for testing the contact angle, and the wettability of the conductive silver paste is analyzed. The conductive silver paste provided by the invention comprises the following components in percentage by mass: 75-90% of silver powder; 2-8% of glass powder; 8-17% of an organic carrier; the organic solvent is a mixed organic solvent composed of texanol, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate and dibutyl phthalate according to the mass ratio of 3: 4: 2: 1; the crystalline silicon solar cell is a TOPCon silicon wafer. In the high-temperature sintering process of the organic carrier, uniform distribution of the slurry during high-temperature sintering can be well met through layered volatilization, and the proper wettability can meet the requirements of different types of slurry and step-by-step printing slurry of a battery piece.

The invention relates to the technical field of composite materials, and discloses a wide-angle field-of-view AR imaging nano composite material and a preparation process thereof, the wide-angle field-of-view AR imaging nano composite material comprises the following raw materials by weight: 60-80 parts of an organic polymer matrix, 10-30 parts of nano optical functional particles, and 5-15 parts of a plasticizer; the nano optical functional particle is prepared from a core functional raw material and a structure regulating agent, the plasticizer is dibutyl phthalate or tributyl citrate, and the organic polymer matrix is a mixture of one or more of polymethyl methacrylate, polystyrene or polyurethane. Through compounding of the organic polymer matrix and the specific nano optical functional particles, collaborative optimization of optical performance of the composite material in a wide-angle field-of-view AR imaging scene is realized, and core defects of imaging picture distortion and field-of-view angle limitation are overcome, so that the actual demand of AR equipment for large-range clear imaging is met.

The invention relates to the field of organic pigments, and discloses a preparation method and application of nano organic pigments with different crystal forms. The preparation method comprises the following steps: 1) dissolving an organic pigment crude product in a good solvent, and adding inorganic salt for activation; 2) dropwise adding a poor solvent at a gradient rate, adding a crystal form guiding agent, and inducing formation of a crystal nucleus; wherein the alpha crystal form directing agent is magnesium stearate; the beta crystal form directing agent is dibutyl phthalate; the gamma crystal form directing agent is polyethylene glycol; the initial gradient rate is 0.5-1 mL / min, and the gradient rate is increased by 0.2-0.3 mL / min every 8-12 min; 3) ultrasonic treatment; 4) cooling, and adding a surface modifier for surface modification; according to the preparation method, the nanometer organic pigment with the target crystal form can be accurately obtained through process regulation and control, the nanometer organic pigment is uniform in particle size distribution, good in dispersity, good in heat-resistant stability and high in color and luster strength, and the nanometer organic pigment has the advantages of being good in flocculation-resistant stability and weather resistance after a coating is formed.

The invention belongs to the technical field of traditional Chinese medicines, and relates to a glycyrrhiza uralensis n-butyl alcohol extract and application of effective components thereof. The invention relates to a glycyrrhiza uralensis n-butyl alcohol extract. The effective components of the glycyrrhiza uralensis n-butyl alcohol extract are prepared from glycyrrhiza uralensis isoflavanone, glycyrrhiza stem alcohol A, licorcidine, dibutyl phthalate, glycyrrhizin I, 3 '-Dimethylallylkievitone, lupinone, glycyrrhiza flavonol, edediol, 1-methoxy phaseolin and isoderrone. The glycyrrhiza uralensis n-butyl alcohol extract is prepared from the following raw materials: glycyrrhiza uralensis, glycyrrhiza uralensis, glycyrrhiza uralensis, glycyrrhiza uralensis, glycyrrhiza uralensis, glycyrrhiza uralensis, glycyrrhiza uralensis, glycyrrhiza uralensis, glycyrrhiza uralensis and glycyrrhiza uralensis, the anti-streptococcus mutans activity of the glycyrrhiza uralensis n-butyl alcohol extract provided by the invention is superior to that of an extract extracted by ethanol in the same extraction method. The method has more advantages in the aspect of preventing streptococcus mutans infection and decayed teeth, and a theoretical basis is provided for research and development of new products.

The invention provides a pouring sealant and a pouring method. The pouring sealant comprises a sealant A and a sealant B, the adhesive A comprises the following components in percentage by mass: 45%-55% of heat-conducting silicone grease; 30%-40% of epoxy resin; 7% to 11% of toluene diisocynate; 2.5% to 3.5% of dibutyl phthalate; 0.8% to 1.2% of an epoxy diluent; 1.5%-2.5% of a black paste; the glue B comprises the following components in percentage by mass: 10%-14% of silicon dioxide; 75%-85% of a modified amine curing agent; and 1%-5% of black paste. According to the pouring sealant and the pouring method provided by the invention, the mechanical property, the physical property and the durability and the reliability of the functionality of a product can be protected; and the product is prevented from being detached and copied, the core technology of the product is effectively protected, and the pouring sealant performance is excellent.

The invention provides a porous ion exchange membrane and a preparation method thereof, a fuel cell and application, the preparation method of the porous ion exchange membrane comprises the following steps: step S1, dispersing a porous membrane substrate polymer and an organic pore forming agent in a solvent to obtain a membrane casting solution; s2, the membrane casting solution is taken and sequentially subjected to drying, soaking and washing treatment, and the porous ion exchange membrane is obtained; wherein the organic pore-forming agent is selected from at least two of beta-cyclodextrine, glycerol, polymethacrylate, dibutyl phthalate or polyethylene glycol and / or polyethylene glycol with different weight-average molecular weights. The porous ion exchange membrane prepared by adopting the method has good mechanical performance, relatively strong ion transmission performance and relatively excellent comprehensive performance, and the preparation method is simple in step, relatively low in cost and suitable for large-scale production and has a wide industrial application prospect.

The invention discloses a pumpable resin anchoring agent for mounting a mine tunnel anchor rod and a pumping device of the pumpable resin anchoring agent, and relates to the field of mine anchor rod mounting devices. Comprising the following components in parts by weight: 100-120 parts of unsaturated polyester resin, 1-3 parts of an accelerant, 1-10 parts of a thixotropic agent, 300-400 parts of superfine modified filler, 2-5 parts of a silane coupling agent, 3-6 parts of a low-shrinkage additive, 1-3 parts of a wetting dispersant and 1-2 parts of a styrene inhibitor; the catalyst component is prepared from the following components in parts by weight: 10 to 15 parts of benzoyl peroxide, 10 to 15 parts of dibutyl phthalate, 5 to 10 parts of a composite initiator, 0.5 to 1.5 parts of a thickening agent, 0.1 to 0.3 part of zinc stearate and 100 to 120 parts of deionized water; during construction, a resin component and a catalyst component are mixed according to the mass ratio of 100: (10-20), and are conveyed and injected into a drill hole through a pumping device; by matching with the pumping device with the rotary groove cutting, multi-channel grouting and pressure monitoring functions, active leaking stoppage, accurate isolation and efficient anchoring of irregular drill holes of a mine tunnel are achieved, and the sealing performance, stability and construction efficiency of anchor rod installation are greatly improved.

The invention relates to the field of ceramics for semiconductors, and discloses aluminum nitride ceramic tape casting slurry, a high-elongation aluminum nitride ceramic green tape and a preparation method and application thereof.The aluminum nitride ceramic tape casting slurry is prepared from, by mass, 70-75 parts of aluminum nitride raw powder and 25-30 parts of organic solvent through mixing and ball milling, the dispersing agent accounts for 0.5%-0.8% of the mass of the aluminum nitride raw powder, the binder accounts for 3%-10% of the mass of the aluminum nitride raw powder, the composite preparation accounts for 1%-9% of the mass of the aluminum nitride raw powder, and the composite preparation comprises dioctyl phthalate, dibutyl phthalate and dioctyl adipate according to the mass ratio of (2-4): (1-2): (1-2). By adopting the composite preparation with a specific ratio, the uniformity and flowability of the tape-casting slurry can be remarkably improved, the surface defects of a green belt are reduced, the elongation rate of the tape-casting slurry is up to 37%, the processing requirements of tubular curved surface structure aluminum nitride ceramic parts can be met, the cracking risk in the glue discharging and sintering process is reduced, and the service life of the tape-casting slurry is prolonged. The method can be widely applied to preparation of special-shaped ceramic elements for semiconductor equipment.

The invention relates to a water-based aerogel heat insulation coating, a preparation method and application thereof. The coating at least comprises the following three components A, B and C. The component A comprises 0.5-3 parts of hydroxyethyl cellulose, 1-3 parts of lignocellulose filler and 100-150 parts of water; the component B comprises the following components in parts by weight: 2-8 parts of a wetting agent, 1-3 parts of a defoaming agent, 70-110 parts of water, 1-3 parts of a dispersing agent and 5-20 parts of aerogel powder; a component C: 120-180 parts of an acrylic emulsion, 30-55 parts of glass beads, 1-5 parts of dibutyl phthalate, 5-10 parts of a texanol coalescing agent and 1-4 parts of a defoaming agent; wherein the weight part of each specific component in the three components A, B and C accounts for the proportion of the raw materials formed by the three components A, B and C, and the three components A, B and C are respectively and independently stirred and uniformly mixed and then are subjected to mixed reaction; the coating has excellent heat insulation performance and environment-friendly characteristic, can be directly constructed on the surface of a high-temperature pipeline through a spraying process, and has the advantages of excellent adhesive force and low possibility of separation after long-term use.

The invention discloses a high-strength normal-temperature curing binder and a preparation method thereof. The high-strength normal-temperature curing binder is prepared by mixing a component A and a component B, the component A is prepared by mixing the following components in parts by weight: 100 parts of matrix epoxy resin, 50-55 parts of acidic aluminum oxide, 1-3 parts of fumed silica and 7-9 parts of dibutyl phthalate; and the component B is prepared by mixing the following components in parts by weight: 20-30 parts of a 593 curing agent and 3-4 parts of a curing accelerator. By adjusting the formula of the adhesive, the problems that the adhesive is poor in environmental adaptability, low in strength, complex in curing process and not cured at normal temperature in the bonding process are solved.

The application belongs to the technical field of organic pollutant treatment, and particularly relates to a single-atom Co-anchored TiO2 catalyst and a preparation method and application thereof. The application provides a single-atom Co-anchored TiO2 catalyst, which comprises nano TiO2 and single-atom Co; the single-atom Co is dispersed on the surface of the nano TiO2; the loading amount of the single-atom Co is 0.1-1 wt%, the nano TiO2 is in the shape of a doughnut, and the specific surface area of the nano TiO2 is 100-150 m 2 / g. The single-atom Co-anchored TiO2 catalyst provided by the application can degrade dibutyl phthalate DBP in water by 100%, has a high single-atom loading amount, has higher visible light activity, and can significantly improve the removal rate of persistent organic pollutants such as plasticizers. The single-atom Co-anchored TiO2 catalyst provided by the application can catalytically degrade organic pollutants in water bodies with a pH value of 3-12, has excellent reusability, and greatly reduces the economic cost of the catalyst.

The invention belongs to the technical field of metal surface treatment, and particularly discloses a corrosion inhibition inhibitor for hydrochloric acid pickling and a preparation method and application thereof, and the corrosion inhibition inhibitor comprises hexamethylenetetramine, ferric chloride, ethyl silicate, glacial acetic acid, dibutyl phthalate, sodium hydroxide, ethylenediamine tetraethanol and desalted water. The inhibitor can form a protective film on the metal surface, effectively inhibits corrosion of acid liquor to a strip steel matrix, reduces iron loss, hydrogen embrittlement and acid mist emission, is suitable for a cold-rolled strip steel hydrochloric acid pickling process, and has the advantages of being small in addition amount, high in inhibition efficiency, environmentally friendly and the like.

The invention belongs to the technical field of synthesis of protective agents, and particularly relates to a nanoscale multifunctional protective agent for stone cultural relics and a preparation method of the nanoscale multifunctional protective agent for the stone cultural relics. Comprising the following materials in parts by mass: 15-20 parts of modified nano silicon dioxide, 6-8 parts of nano titanium dioxide, 3.5-5 parts of a composite antibiotic agent, 1.5 parts of alkylphenol polyoxyethylene ether, 0.5 part of polyvinylpyrrolidone, 1 part of nano Ca (OH) 2 dispersion liquid, 2.5 parts of methyl silicone resin, 0.8-1.2 parts of dibutyl phthalate and 0.6 part of sodium polyacrylate. Nano silicon dioxide is modified by a silane coupling agent to form a core-shell structure, and the core-shell structure and multiple components are bonded and self-assembled to form a network integrating reinforcement, hydrophobicity, biological resistance and weather resistance; a waterproof layer can be formed in stone pores, air permeability is kept, pore walls can be reinforced and repaired, and the durability and service life of cultural relics are improved.

A urethane-based adhesive composition includes a urethane prepolymer, a carbon black A having a dibutyl phthalate oil absorption number of 30 to 40 ml / 100 g, a carbon black B having a dibutyl phthalate oil absorption number of 98 to 108 ml / 100 g, a calcium carbonate C, a plasticizer D, a modified product E of an aliphatic diisocyanate, and a catalyst, and the urethane-based adhesive composition is configured to satisfy all of the following (1) to (6): (1) 25≤a≤35, (2) 55≤b≤75, (3) 197≤a+3b≤251, (4) 30≤c≤35, (5) 35≤d≤45, and (6) 9≤e≤13.

The application discloses a linear drainage ditch for rural areas and a permeation testing method thereof, relates to the technical field of sewage collection, and solves the problems of high use cost and easy damage of the existing concrete drainage ditch for rural areas, reduces the material consumption, and reduces the construction difficulty, and the specific scheme is as follows: the drainage ditch main body is provided with a grid on the groove, the drainage ditch main body is made of a mixed material, the main agent of the mixed material is epoxy resin, the curing agent is modified amine T31 synthesized by phenol, formaldehyde and fatty amine, the diluent is acetone, the toughening agent is dibutyl phthalate, the filler is fly ash, and the aggregate is fine aggregate produced by using construction waste.

This invention discloses a method for preparing a high-temperature positioning tape, comprising the following steps: stirring isooctyl acrylate, isobornyl acrylate, hydroxyethyl acrylate, dibutyl phthalate, methyl methacrylate, and ethyl acetate; gradually heating to 60-70°C, adding azobisisobutyronitrile (AIBN), reacting for 1-3 hours, adding AIBN again and raising the reaction temperature to 75-85°C, reacting for 2-4 hours, and after the reaction is complete, adding ethyl acetate to form a synthetic adhesive; adding an aliphatic isocyanate curing agent and a benzotriazole UV absorber to the synthetic adhesive, adjusting the solid content to 28-32% with an organic solvent, transferring it onto a substrate layer, and curing in an oven. This invention's photovoltaic high-temperature positioning tape improves both the weather resistance of the adhesive itself, enhancing its resistance to yellowing after high-temperature and high-humidity aging, and also increases its adhesive strength.

The invention provides an immobilized microbial agent with carbon sequestration and decontamination capabilities as well as a preparation method and application thereof, and belongs to the technical field of microorganisms. The immobilized microbial agent is prepared by taking bacillus glutamicum, bacillus, haematococcus, carbon sequestration ammoxidation archaea and carbon sequestration bacterium acetobacter xylinum as raw materials and taking charcoal as a carrier, and has efficient degradation capacity on dimethyl phthalate, diethyl phthalate, dibutyl phthalate, butyl benzyl phthalate and the like; and the soil carbon sequestration capability can be enhanced.

The invention discloses a protective layer for an installation-free magnetic lamp on an oil field site and a preparation method of the protective layer, and belongs to the technical field of coatings, the protective layer is attached to a magnetic suction plate surface of the installation-free magnetic lamp, a plurality of magnets which are evenly distributed are installed on the magnetic suction plate surface of the installation-free magnetic lamp, and the magnets are neodymium iron boron magnets. The static attraction force of a single magnet is larger than 20 kg, and the protective layer comprises a bottom layer and a stripping layer. The bottom layer is prepared from isocyanate group modified fluorocarbon resin, an NHS (N-Hydroxysuccinimide) activated ester modified mica flake modified nano magnetic powder compound, an ethylene-vinyl alcohol copolymer, n-butyl acetate, dibutyl phthalate, a polycarboxylate dispersing agent and 3-isocyanate group propyl trimethoxy silane; the stripping layer is prepared from isocyanate group modified fluorocarbon resin, acrylate polyol, poly (N-isopropylacrylamide) modified pressure-sensitive viscous microspheres and a silane coupling agent. The problems of oil stain and corrosion are solved.

The invention belongs to the technical field of organic synthesis, and particularly relates to heat-resistant polymethyl methacrylate. The invention relates to a high-temperature-resistant acrylic resin, which is prepared from the following raw materials in parts by weight: 90 to 100 parts of methyl methacrylate, 4 to 6 parts of methacrylic acid polycyclic norbornene ester and / or methacrylic acid isobornyl ester, 2 to 3 parts of methacrylic acid amide, 1 to 5 parts of divinylbenzene, 1 to 2 parts of pentaerythritol stearate / glyceryl tristearate, 1 to 3 parts of dibutyl phthalate, 0 to 15 parts of solvent, 0.1 to 0.5 part of initiator and 0.1 to 0.5 part of chain transfer agent. The heat-resistant polymethyl methacrylate is prepared through the steps of prepolymerization, secondary polymerization and devolatilization extrusion, and vacuum cyclization is achieved through secondary polymerization. The heat resistance and the heat stability of the heat-resistant polymethyl methacrylate are improved, the water absorption rate of the heat-resistant polymethyl methacrylate is reduced, and the application range of the polymethyl methacrylate is expanded.

The application discloses a preparation method of modified coal pitch and a preparation method of carbon material. The preparation method of modified coal pitch comprises the following steps: mixing a plasticizing agent, a synergist and an additive, then adding coal pitch, stirring, heating to 140-160 DEG C, and constant temperature reaction, so that the modified coal pitch is obtained; the plasticizing agent comprises dibutyl phthalate and / or dioctyl phthalate; the synergist comprises one or more of light oil, naphthalene oil, wash oil, phenol oil and anthracene oil; and the additive comprises carboxymethyl cellulose and / or sodium polyacrylate. The application can significantly improve the wettability of the binder coal pitch to the aggregate without reducing the coking value of the coal pitch, makes the modified coal pitch more evenly distributed among the aggregate, and makes the obtained carbon graphite material have lower porosity, higher bulk density and more excellent electrical and mechanical properties, and the carbon graphite material has excellent thermal stability and structural integrity under high-temperature working conditions.

The application belongs to the field of conductive paste preparation, and specifically discloses a conductive paste containing ruthenium oxide and a preparation method thereof.The conductive paste contains, in mass percentage, 40-50% ruthenium oxide, 3.8-5% carbon nanotubes, 5-10% PbO-B2O3-SiO2, 3-8% ethyl cellulose, 21-28% terpineol, 9-12% butyl carbitol, 0.7-1% polyacrylammonium, and 1-2% dibutyl phthalate.The preparation method uses vacuum-activated ruthenium oxide, and combines a mixed solvent, ball milling and ultrasonic dispersion synergistic process after dispersion, so that the paste is uniformly dispersed and has excellent stability.The application constructs a ternary synergistic system of ruthenium oxide-carbon nanotube-glass frit, and uses terpineol and butyl carbitol in a specific mass ratio as a mixed solvent, effectively solving the problems of insufficient conductivity and easy agglomeration of traditional paste, and can be widely applied to high-precision electronic device manufacturing.

The present invention relates to the field of sensor technology, and discloses a platinum-rhodium-based electrode slurry and its preparation method and application. The platinum-rhodium-based electrode slurry includes the following raw materials in percentage by weight: 34-49% platinum powder, 10-14% rhodium powder, 7.1-10% zinc oxide-nickel oxide composite, 5.2-6.4% yttria-stabilized zirconia, 23-38% organic binder, and 0.5-1.2% inorganic binder; wherein, the raw materials for preparing the organic binder include terpineol, dibutyl phthalate, ethyl cellulose, and polyaniline-modified polyethylene glycol. The electrode slurry provided by the present invention has better rheology and stability, and is not prone to slurry phase separation phenomenon after long-term storage, thereby improving the printability of the slurry, and improving the electrode morphology of the formed sensitive electrode and the length of the three-phase interface so that the sensitive electrode has higher catalytic activity.

The application discloses a plant salt-tolerance promoting active metabolite separated from a rhizosphere growth-promoting Pseudomonas proteus and application thereof. The metabolite is dibutyl phthalate (DBP) with a molecular formula of C 16 H 22 O4, has the effect of improving the salt tolerance of rice, and obviously increases the plant height, root length, aboveground fresh weight and underground fresh weight of the rice, is stable in effect, and has a good application prospect; and can be used as a preparation for improving the salt tolerance of crops in agricultural green production.