708 results about "Butyraldehyde" patented technology

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a high-purity aluminum oxide ceramic substrate and a preparation process thereof. The high-purity aluminum oxide ceramic substrate is prepared from the following raw materials in parts by weight: 0.20 to 0.25 part of magnesium oxide, 0.35 to 0.55 part of zirconium oxide, 1.2 to 1.5 parts of dispersing agent, 60 to 65 parts of ethanol, 99.7 to 99.8 parts of aluminum oxide, 12 to 15 parts of adhesive, 6 to 9 parts of plasticizer and 50 to 55 parts of n-butyl alcohol, the adhesive is a mixture of polyvinyl butyral, water glass and modified paraffin. The prepared high-purity aluminum oxide ceramic substrate has excellent chemical stability and mechanical strength, and the obtained aluminum oxide ceramic substrate has better density, mechanical property and thermal stability by mixing various raw material components, and is not easy to break when subjected to bending load.

The invention discloses water-based formaldehyde-free woodworking glue and a preparation method thereof, and relates to the technical field of woodworking glue. When the water-based formaldehyde-free woodworking glue is prepared, firstly, n-butyllithium is used as an initiator to initiate cyclosiloxane and an acrylate monomer to be polymerized, then dimethyl chlorosilane is used for blocking to obtain pre-modified polyacrylate, and the pre-modified polyacrylate is used for preparing the water-based formaldehyde-free woodworking glue. Reacting the pre-modified polyacrylate with vinyl diphenylphosphine, and then reacting with 3-(4-bromophenyl)-1-propylene to obtain modified polyacrylate; secondly, reacting the 4-(trimethoxysilyl) butyraldehyde modified silicon dioxide with chitosan, and then reacting with mercaptoacetic acid to obtain modified silicon dioxide; finally, mixing the modified polyacrylate, the modified silicon dioxide, an emulsifier, a defoaming agent, pure water and a photoinitiator to obtain the water-based formaldehyde-free woodworking glue. The water-based formaldehyde-free woodworking glue prepared by the invention has flame retardance and antibacterial property.

The invention discloses a lithium ion battery anti-cracking agent and a preparation method and application thereof.The preparation method is carried out under nitrogen protection and comprises the steps that a first polymer, a second polymer and a modifier are dissolved in a first solvent, and under the action of a catalyst, a reaction is carried out for 4-48 h at the temperature of 60-100 DEG C; and after the reaction is finished, cooling to below 40 DEG C, adding an amine compound, and reacting for 0.5-8 hours to obtain the anti-cracking agent for the lithium ion battery. The first polymer is polyvinyl butyral, and the hydroxyl content of the polyvinyl butyral is 18-21%; the second polymer is a triblock polymer as shown in a structural formula I, and the content of methyl methacrylate in the second polymer is 8-65%; the modifier is maleic anhydride or a maleic anhydride derivative; the catalyst is one of p-toluenesulfonic acid, hydrochloric acid and sulfuric acid. According to the anti-cracking agent, the battery pole piece can be intact and does not crack at high surface density under the condition of relatively low addition amount.

The present application provides a device and method for preparing methyl isoamyl ketone. In the method, acetone and isobutyraldehyde are reacted under the catalysis of a condensation catalyst and a hydrogenation catalyst in the presence of hydrogen to obtain the methyl isoamyl ketone, wherein the condensation catalyst comprises an organic base; and the molar ratio of the condensation catalyst to the isobutyraldehyde is (0.02-0.15):1. The MIAK obtained by the method has at least one of the advantages of high conversion rate, simple process flow, low production cost, easy separation of side reaction products, and high product purity.

The invention relates to the technical field of functional materials, in particular to a polyvinyl butyral flexible material as well as a preparation method and application thereof. The molecular chain regularity is destroyed through an isobutyraldehyde branched chain, the crystallinity is reduced, and the flexibility is improved; cesium-tin co-doped tungsten oxide has high infrared rejection rate and good dispersity, and the influence on the flexibility of the material is reduced; magnesium salicylate and magnesium formate are compounded, so that the reaction activity with resin is reduced, and the bonding stability in the bending process is ensured; the flexibility and migration resistance of the material are synergistically improved through the flexible plasticizer, and the interlayer sheet is prevented from being sticky; the flexible reinforcing agent polycaprolactone micro powder is used for forming an elastic node, bending stress is absorbed, and the recovery performance is improved. The polyvinyl butyral flexible material provided by the invention has flexible bending performance, an efficient infrared barrier function and stable bonding performance, is suitable for scenes such as curved building curtain walls, special-shaped automobile sunroofs or arc-shaped rail traffic windows, and has a wide application prospect.

The invention relates to the technical field of soldering tin, in particular to a low-splashing lead-free tin wire coated with rosin, which comprises the following alloy components: Sn, Sb, Cu, Ge, P, Ga, In and Ni. The solder wire is manufactured through extrusion forming and is coated with scaling powder composed of rosin resin, maleic anhydride, polyoxypropylene glycerol ether, composite ammonium salt, a solvent, sodium carboxymethyl cellulose and polyvinyl butyral. By optimizing the alloy components and the formula of the soldering flux and adding antimony, copper, germanium, phosphorus, gallium, indium and nickel elements, the fluidity and wettability of a solder wire are improved, soldering tin is easier to spread in the welding process, the outer covering rosin is decomposed in the welding process to generate active substances, oxides on the surface of metal can be removed, and the welding quality is improved. Good contact between the soldering tin and the metal surface is promoted, the surface tension of the soldering tin is further reduced, the fluidity of the soldering tin is improved, and therefore the splashing rate is remarkably reduced.

The invention provides a separation method of a catalyst for preparing butyraldehyde through propylene carbonylation, and relates to the technical field of chemical synthesis. The separation method comprises the following steps: carrying out flash evaporation separation and low-pressure evaporator evaporation on a material obtained by carrying out a propylene carbonylation reaction on propylene and synthesis gas as raw materials, obtaining a gas-phase material from a collecting tank of a low-pressure evaporator, and outputting a liquid-phase catalyst solution; the gas-phase material is subjected to condensation and gas-liquid separation, crude butyraldehyde is output, and obtained non-condensable gas returns to a liquid distribution chamber of the low-pressure evaporator; wherein the catalyst is acetylacetone triphenyl phosphorus silicification carbonyl rhodium, and the operation temperature of the low-pressure evaporator is 85-95 DEG C. By controlling the circulating air volume and the evaporation temperature, high-temperature deactivation of the catalyst is prevented, the service life of the catalyst is prolonged, and the process cost is reduced; the process flow is simplified, and the method is suitable for large-scale process production.

The invention belongs to the technical field of court ground materials, and particularly relates to a ground material of a ground throw court and a preparation method thereof. The ground material of the ground throwing field comprises the anti-skid surface layer, the elastic buffer layer and the sound insulation layer from top to bottom, and has excellent sound insulation, impact resistance and wear resistance. The polyvinyl butyral bonded acrylic sound insulation felt and the jute fiber board are used as a sound insulation felt composite material to be laid on the surface of the base layer, so that the sound insulation effect of the ground of the ground throwing field is enhanced, boric acid and phenylboronic acid are compounded to react with siloxane, and reinforced gel prepared by adding a reinforcing material has excellent shear hardening and thermal stability, so that the sound insulation effect of the ground of the ground throwing field is improved. An elastic reinforcing material is prepared by compounding alkali-treated straw fibers and a reinforcing body prepared by compounding the alkali-treated straw fibers and a hydrophobically modified sponge framework, and has remarkable creep resistance and excellent impact hardenability, and the esterified straw fibers prepared by reacting the alkali-treated straw fibers with citric acid are used as a toughening agent to be added into wear-resistant elastic microspheres prepared by rubber, so that the wear-resistant performance of the wear-resistant elastic microspheres is greatly improved. The material has excellent wear resistance, light weight and aging resistance.

The invention relates to the technical field of ceramic materials, in particular to high-purity aluminum nitride ceramic and a preparation method thereof.The preparation method of the high-purity aluminum nitride ceramic comprises the following steps that S1, granulation is conducted, specifically, aluminum nitride, a dispersing agent and modified polyvinyl butyral are mixed and granulated; s2, dumping and sintering: performing thermal degreasing in a dumping furnace, setting the heating rate to be 0.5-1.5 DEG C / min, setting the degreasing temperature to be 500-600 DEG C, and keeping the temperature for 2-4 hours; s3, compression molding: pressing into a green body by using an isostatic press, and controlling the molding pressure to be 80-100Mpa; s4, hot pressed sintering: smearing the protective liquid on the surface of the green body, and sintering in a heating and pressurizing manner; and S5, cooling and grinding are conducted, specifically, the sintered body is cooled to the normal temperature and ground to be flat. According to the preparation method of the high-purity aluminum nitride ceramic, the obtained ceramic chip has good mechanical strength and compactness.

According to the high-thermal-conductivity flame-retardant copper-clad laminate and the preparation method thereof, the thermal conductivity and the limit oxygen index of a copper-clad plate can be effectively improved, so that the high-thermal-conductivity flame-retardant property of the copper-clad plate is effectively improved; modified aluminum nitride and phosphoric acid modified aluminum nitride powder in the heat-conducting filler can keep good hydrolysis resistance in the ball milling process; polyvinyl butyral and polyethylene glycol are compounded as a binder, so that the modified aluminum nitride has good sphericity and surface smoothness, and the spherical aluminum nitride prepared by water-based spray granulation is suitable for being used as a heat-conducting filler of a thermal interface material; modified silicon dioxide in the heat-conducting filler adopts cerium-doped hollow mesoporous silicon dioxide nanospheres coated with polydopamine, and a corrosion inhibitor MBT (2-mercaptobenzothiazole) is loaded by the cerium-doped hollow mesoporous silicon dioxide nanospheres; controllable release of the corrosion inhibitor MBT and rare earth cerium ions is achieved, the process of corroding the cathode and the anode can be inhibited at the same time, and the corrosion resistance and the corrosion self-repairing performance of the copper-clad plate can be effectively improved.

The invention relates to a porous beryllium oxide ceramic and a preparation method thereof, belongs to the technical field of porous ceramics, and aims to solve at least one of the problems that the porous beryllium oxide ceramic prepared by the existing method is low in porosity, low in strength, high in sintering process difficulty, easy to cause powder aggregation, poor in forming and the like. According to the invention, the nano beryllium oxide, the nano magnesium oxide, the nano aluminum silicate, the polyvinyl butyral, the sesbania powder and the absolute ethyl alcohol are combined according to a specific proportion, and the substances have a synergistic effect, so that the porosity, the strength and other properties of the porous beryllium oxide ceramic are improved. According to the invention, through elaborately designed component combination and a synergistic effect mechanism, comprehensive improvement of the performance of the porous beryllium oxide ceramic is realized, and a wider prospect is opened up for research, development and application of a ceramic material.

The invention provides a metallic yarn protection liquid and a preparation and application method thereof, and the preparation and application method comprises the following steps: S1, dissolving an alkali-resistant resin mixture in a solvent, stirring, and uniformly dispersing to obtain a uniform solution, wherein the alkali-resistant resin mixture is prepared from the following components in percentage by mass: 30 to 35 percent of epoxy resin, 20 to 25 percent of polyvinyl butyral resin, 20 to 25 percent of polyurethane resin and 15 to 20 percent of fluorocarbon resin; s2, adding a tackifier, a plasticizer, an ultraviolet absorbent, a wear-resistant additive, a waterproof additive and an antioxidant into the uniform solution, fully stirring, and uniformly dispersing to obtain a transparent solution, wherein the tackifier is rosin; and S3, adding a surfactant into the transparent solution, continuously stirring, and uniformly dispersing to obtain the metallic yarn protection liquid, wherein the prepared metallic yarn protection liquid has multiple functions of high alkali resistance, solarization resistance, friction resistance and washing resistance.

The invention discloses a preparation method of a high-cycle-resistance water-based aluminum pigment, relates to the technical field of chemical materials, and aims to improve the cycle resistance of the aluminum pigment, and the preparation method comprises the following steps: adding silver type aluminum pigment slurry into a double-jacket reactor, dispersing with isopropanol, and stirring to obtain an aluminum pigment suspension; coating the surface of the aluminum pigment with a flexible organic polymer; and then carrying out secondary coating by using a rigid silane coupling agent. The invention further discloses the high-cycle-resistance water-based aluminum pigment prepared by the method and application of the high-cycle-resistance water-based aluminum pigment in automatic spraying of water-based automobile paint. According to the invention, a double-layer or even multi-layer coating system is adopted, the inner layer coats the aluminum pigment core with a flexible organic polymer such as polyvinyl butyral, the outer layer coats the aluminum pigment core with a rigid silane coupling agent, the inner layer provides buffering, the outer layer enhances protection, and the inner layer and the outer layer have a synergistic effect, so that the prepared pigment has very high deflation stability and mechanical stability; and the shear resistance is high.

The utility model provides a butyraldehyde-butanol mixture preparation system, which comprises a high-pressure reactor, a high-pressure reactor, a high-pressure reactor and a high-pressure reactor, wherein a partition plate is arranged in the middle of the high-pressure reactor; a first reaction zone is arranged above the partition plate, a second reaction zone is arranged below the partition plate, and catalyst inlets are formed in the side walls of the first reaction zone and the second reaction zone; a propylene inlet and a carbon monoxide inlet are formed in the side wall of the first reaction zone; a first bubble crushing unit is arranged in the first reaction area; a mixed gas inlet is formed in the side wall of the second reaction area; and a second bubble crushing unit is arranged in the second reaction area. The system disclosed by the utility model is simple in overall structure, and butyraldehyde-butanol is prepared by arranging the two reaction areas, so that the reaction efficiency is improved; meanwhile, the bubble crushing unit is arranged in the high-pressure reactor, so that the phase boundary mass transfer area of gas and liquid phases can be increased, the gas utilization rate and the reaction efficiency are improved, the energy consumption and the raw material loss are reduced, and the operation process is simplified.

The invention discloses a pH response Ti < 3 > C < 2 > T < x >-based polyvinyl butyral self-repairing anti-corrosion coating and a preparation method thereof. The preparation method comprises the following steps: preparing Ti < 3 > C < 2 > T < x > (at) PDA by polymerizing dopamine on the surface of a Ti < 3 > C < 2 > T < x > (at) PDA, loading Ce-P-I < m >-MOF onto the Ti < 3 > C < 2 > T < x > (at) PDA, finally mixing into polyvinyl butyral-methanol, and coating on the surface of a copper plate to obtain the pH-responsive Ti < 3 > C < 2 > T < x >-based polyvinyl butyral self-repairing anticorrosive coating. Wherein PDA has the dual effects of improving the dispersibility and oxidation resistance of Ti3C2Tx and inhibiting corrosion promotion; imidazole in Ce-P-Im-MOF responds to the pH change of a corrosion area through redox cycle, cerium ions and phosphate radicals are dynamically released to form a passivation film, the Ti3C2Tx nanosheet labyrinth effect is overlaid, a'dynamic passivation-physical shielding-conductive regulation 'triple anti-corrosion mechanism is formed, and the corrosion resistance of a matrix is remarkably improved.

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 discloses a preparation method of heat-insulating PVB (Polyvinyl Butyral) resin powder and a heat-insulating PVB film, and belongs to the technical field of PVB resin powder preparation. Comprising the following steps: S1, adding heat-insulating powder, sodium citrate and an auxiliary agent into a hydrochloric acid solution, fully stirring to obtain a heat-insulating powder suspension, ball-milling to obtain slurry, adjusting the pH value to be less than 1, and centrifuging to obtain a nano heat-insulating dispersion liquid; s2, fully reacting a PVA solution / n-butyraldehyde mixed solution with the nano heat-insulating dispersion liquid, washing, centrifuging and drying to obtain heat-insulating PVB resin powder; wherein the heat insulation powder is selected from rare earth element compounds. The PVB resin powder is used for preparing the heat-insulating PVB film. The infrared barrier rate of the PVB film in a low wave band and a high wave band can reach 98% or above, the full-wave-band infrared light barrier performance is remarkably improved, the light transmittance meets the standard of the heat-insulating PVB film, the haze is greatly reduced compared with a common heat-insulating film without a sodium citrate auxiliary, and the heat-insulating PVB film has excellent infrared shielding performance and optical performance.

The low-VOC modified melamine formaldehyde resin is prepared from the following components in parts by weight: 80 to 100 parts of melamine formaldehyde resin, 5 to 10 parts of hydroxyl-terminated hyperbranched polyester, 8 to 15 parts of epoxy-terminated polybutadiene, 1 to 3 parts of fumed silica, 5 to 15 parts of polyvinyl butyral, 0.1 to 0.2 part of a coupling agent, 1 to 3 parts of a catalyst and 2 to 5 parts of a cross-linking agent, the preparation method comprises the following steps: in a stirring state, adding hydroxyl-terminated hyperbranched polyester, epoxy-terminated polybutadiene, a polyvinyl butyral resin solution and coupling agent modified fumed silica into a melamino-formaldehyde resin solution, heating to 50-70 DEG C, and adding a catalyst and a cross-linking agent; the melamine modified resin prepared by the components and the preparation method has the characteristics of low formaldehyde volatilization, high toughness and durability.

The invention discloses bio-based polyester and a preparation method thereof, and belongs to the technical field of biomass resource utilization and bio-based polyester, and the bio-based polyester comprises the following components: deacetylated chitosan, aldehyde modified lignin, polybasic organic amine, polybasic aldehyde monomer, a catalyst, 1, 4-dioxane, methanol and deionized water. The method comprises the following steps: extracting chitosan from shrimp / crab shells, and exposing primary amino groups through alkali treatment; the method comprises the following steps: extracting lignin from coffee grounds, and grafting an aldehyde group with a polyaldehyde monomer; the aldehyde modified lignin and chitosan are subjected to Michael addition reaction and then are crosslinked with polyaldehyde monomers and polybasic organic amine to form a net structure, so that the film forming strength is improved. The environment burden caused by the coffee grounds and shrimp shells or crab shells is reduced, and meanwhile, a low-cost and environment-friendly bio-based polyester is provided for the field of coatings.

The invention relates to the technical field of automobiles, and provides a PVB composite film and a preparation method thereof, laminated glass and an automobile, the PVB composite film comprises a PVB base film and cesium-tungsten bronze composite particles distributed in the PVB base film, each cesium-tungsten bronze composite particle comprises an inner core and a shell layer coating the surface of the inner core, the inner core is made of cesium-tungsten bronze and titanium dioxide, and the shell layer is made of titanium dioxide. And the material of the shell layer comprises polyvinyl butyral. According to the PVB composite film provided by the invention, the material of the cesium-tungsten bronze composite particle shell layer is consistent with that of the PVB base film, so that the compatibility of the cesium-tungsten bronze composite particles and the PVB base film is remarkably improved, the distribution uniformity of the cesium-tungsten bronze composite particles in the PVB base film is favorably improved, and the heat insulation performance of the PVB composite film is greatly improved.

The invention discloses a gas diffusion layer with a gradient pore structure and a preparation method of the gas diffusion layer. The preparation method comprises the following steps: 1, immersing a titanium diamond net into liquid paraffin; 2, absolute ethyl alcohol, tributyl phosphate, polyvinyl butyral and two kinds of spherical titanium powder with different granularities are evenly mixed to prepare second slurry containing coarse-grained spherical titanium powder and first slurry containing fine-grained spherical titanium powder, and the second slurry and the first slurry are sequentially sprayed to the surface of the titanium rhombus net filled with paraffin; and 3, degreasing and sintering the sprayed titanium diamond net for one-step forming to obtain the gas diffusion layer with the gradient pore structure. According to the method, the slurry containing the spherical titanium powder with the coarse granularity and the spherical titanium powder with the fine granularity is sequentially sprayed on the titanium diamond net and sintered, the gas diffusion layer with the gradient hole structure is obtained, it is guaranteed that the gas diffusion layer has the high catalyst utilization rate, high mechanical strength and good gas-liquid transmission, and the structure can be adjusted according to the actual working condition so as to regulate and control the performance of the gas diffusion layer; the method is suitable for the field of PEM electrolytic hydrogen production.

The invention discloses a method for measuring the content of trace water in a polyvinyl butyral film, and belongs to the technical field of trace water detection.The measuring method comprises the steps that the polyvinyl butyral film is added into an alcohol solvent and then sealed and heated, and a sample solution is obtained after the polyvinyl butyral film is completely dissolved; measuring the water content of the alcohol solvent and the water content of the sample solution by adopting a Karl Fischer moisture meter, subtracting the moisture in the alcohol solvent used for preparing the sample solution from the total moisture of the sample solution to obtain the moisture in the film, and calculating the ratio of the moisture in the film to the mass of the film to obtain the trace water content in the polyvinyl butyral film. According to the invention, the polyvinyl butyral film is completely dissolved, so that water in the polyvinyl butyral film is fully released into the solvent, and the test result is more accurate; the Karl Fischer moisture meter is adopted to measure the water content, so that the specificity is very high, the influence of other components on a test result is reduced, the measurement accuracy is high, the repeatability is good, the method is simple, the analysis time is short, and the analysis efficiency is high.

The invention relates to the technical field of metal corrosion prevention, and particularly discloses a titanium alloy bolt surface aluminum coating coating method capable of improving corrosion resistance. A titanium alloy bolt surface aluminum coating coating method capable of improving corrosion resistance comprises the following steps that a titanium alloy bolt is subjected to cleaning and sand blasting pretreatment; the preparation method comprises the following steps: adding the aluminum powder and the benzaldehyde resin into the solvent, mixing and stirring, continuously adding the polytetrafluoroethylene micro powder, the diluent and the self-repairing microcapsule prepared in advance, and continuously stirring until the mixture is uniform, the prepared anti-corrosion aluminum coating is sprayed to the surface of the titanium alloy bolt, after the surface of the coating is dried, curing is conducted for 55 min to 65 min at the temperature of 180 DEG C to 200 DEG C, and the aluminum coating is obtained; the self-repairing microcapsule is prepared by mixing a microcapsule A and a microcapsule B, wherein the microcapsule A is prepared by wrapping a polyurethane prepolymer with polyvinyl butyral as a shell layer, and the microcapsule B is prepared by wrapping a curing agent support with polyvinyl butyral as a shell layer. The aluminum coating prepared through the method has the advantages of being good in corrosion resistance and durability.

The invention relates to a preparation method of quartz sand, and belongs to the technical field of quartz. The preparation method comprises the following steps: S1, adding a polyvinyl butyral solution into silica sol, and uniformly stirring to obtain silica sol dispersion liquid; the polyvinyl butyral solution comprises polyvinyl butyral (PVB) and tert-butyl alcohol; s2, performing spray drying on the silica sol dispersion liquid to obtain quartz microspheres; and S3, carrying out oxidation carbon removal treatment and vacuum dehydroxylation treatment on the quartz microspheres to obtain the quartz sand. Drying cracking and micro-hollow structure defects of the quartz sand can be effectively eliminated, it is ensured that the product is compact and free of pores, and the structural integrity and the use reliability are greatly improved; the density performance bottleneck of quartz sand is successfully broken through, and the bulk density after sintering is remarkably improved; the particle size distribution of the quartz sand can be accurately controlled, and the product particle size uniformity is ensured.

The invention relates to the technical field of water-based paint, in particular to water-based paint for surfaces of multiple materials and a preparation method of the water-based paint for the surfaces of the multiple materials. 4-10 parts of a coalescing agent; 0.2 to 0.5 part of a defoaming agent; 0.3 to 0.8 part of a leveling agent; 3-5 parts of a wax emulsion; 0.2 to 0.5 part of a wetting agent; 0.5 to 2 parts of a thickening agent; 2 to 4 parts of polyvinyl butyral; 1-3 parts of polyethylene glycol monomethyl ether; 0.5 to 2 parts of polyvinyl pyrrolidone; the pure acrylic emulsion is selected as a main film forming substance, carboxyl, hydroxyl and other functional groups on a molecular chain of the pure acrylic emulsion can provide abundant reaction sites, polyvinyl butyral is introduced, an aldehyde group in a molecular structure of the polyvinyl butyral can form a hydrogen bond with the surface of a base material, and meanwhile, an interpenetrating network is formed with the main emulsion through a unique chain segment structure of the polyvinyl butyral; through introduction of polyethylene glycol monomethyl ether, a flexible chain segment improves the leveling property of the system.

The invention provides non-naturally occurring microbial organisms having a 4-hydroxybutyrate, gamma-butyrolactone, 1,4-butanediol, 4-hydroxybutanal, 4-hydroxybutyryl-CoA and / or putrescine pathway and being capable of producing 4-hydroxybutyrate, wherein the microbial organism comprises one or more genetic modifications. The invention additionally provides methods of producing 4-hydroxybutyrate, gamma-butyrolactone, 1,4-butanediol, 4-hydroxybutanal, 4-hydroxybutyryl-CoA and / or putrescine or related products using the microbial organisms.

The invention relates to the field of flame retardants, and particularly discloses a flame retardant, a preparation method thereof and application of the flame retardant in polyvinyl chloride. The flame retardant is prepared from the following raw materials in parts by weight: 2.8 to 3.6 parts of carboxymethyl chitosan microcapsules, 2.5 to 4 parts of hydroxyapatite coated aluminum magnesium hydrotalcite, 3.5 to 4.5 parts of tricresyl phosphate, 0.7 to 0.9 part of expansible graphite and 3 to 5 parts of polyvinyl butyral. The capsule core of the carboxymethyl chitosan microcapsule is magnesium hydroxide loaded bismuth stannate, the capsule wall of the carboxymethyl chitosan microcapsule is carboxymethyl chitosan, and the mass ratio of the carboxymethyl chitosan to the magnesium hydroxide loaded bismuth stannate is (4-5): 1. The flame retardant can be used for polyvinyl chloride and has the advantages of being good in flame retardant and smoke suppression effect and capable of effectively improving the mechanical strength of PVC.

The invention belongs to the technical field of preparation of barium titanate, and particularly relates to a preparation method of a defect-regulating barium titanate composite material, which comprises the following preparation steps: S1, adding a proper amount of barium carbonate, titanium dioxide, nickel oxide and dopant mixed powder into a ball milling tank for ball milling to obtain initial barium titanate composite particles; s2, dispersing the initial barium titanate composite particles obtained in the step S1 into an aqueous solution of a growth inhibitor for reaction to form modified barium titanate composite powder; and S3, mixing the barium titanate composite powder obtained in the step S2 with an adhesive polyvinyl butyral, pressing into a biscuit, performing cold isostatic pressing, sintering, annealing in a nitrogen atmosphere, and performing heat preservation to obtain the defect-regulated barium titanate composite material.

A process for the manufacture of styrene acrylic copolymers having a renewably-sourced carbon content comprises the steps of: a) subjecting a feedstock comprising a renewably-sourced ethanol to dehydration to produce a renewably-sourced ethylene stream; b) subjecting at least a portion of the renewably-sourced ethylene stream to an olefin-interconversion, to obtain a renewably-sourced propylene; the olefin- interconversion comprising (i) and (ii): (i) ethylene dimerization to obtain n-butenes; (ii) metathesis reaction between n-butenes obtained according to (i) and ethylene to obtain propylene; and c) subjecting a portion of the renewably-sourced propylene to an oxidation reaction to produce acrylic acid; d) subjecting a portion of the renewably- sourced propylene to a hydroformylation reaction with syngas to produce n-butyraldehyde; e) subjecting the n-butyraldehyde to hydrogenation to produce n-butanol; f) esterifying acrylic acid obtained in step c) and the n-butanol to produce n-butyl acrylate; g) subjecting ethylene to an alkylation reaction with benzene to produce ethylbenzene; h) subjecting the ethylbenzene to a dehydrogenation reaction to produce styrene; i) copolymerizing the styrene and the n-butyl acrylate to produce a styrene acrylic copolymer. The process has a high renewably-sourced carbon content, in particular an increased renewably-sourced carbon content with respect to the renewably-sourced carbon content available in a cracker-based process.

The invention discloses yoghurt oil with fruity flavor and a preparation method of the yoghurt oil, and belongs to the technical field of yoghurt oil processing. The Lactococcus lactis SITRS-0011 provided by the invention can be independently used as a leavening agent, when the Lactococcus lactis SITRS-0011 is used for fermenting yoghurt oil, the titration acidity can reach 83.21 DEG T, the yoghurt oil contains 2, 3-butanedione (1180 [mu] g / kg), acetoin (2092 [mu] g / kg), lactones (623 [mu] g / kg), 3-methylbutyraldehyde (117 [mu] g / kg), phenethyl alcohol (1863 [mu] g / kg), phenylacetaldehyde (336 [mu] g / kg) and other substances, and the Lactococcus lactis SITRS-0011 is rich in milk flavor, has flower fragrance and nut flavor, is unique in flavor, and can be used for preparing the and the overall sensory score is high.