306 results about "Butanone" patented technology

The invention discloses a colorful acid and alkali resistant laser printing ink and a preparation method thereof. The printing ink is composed of the following components in parts by weight: 0 to 30 parts of butanone, 10 to 30 parts of isopropanol, 2 to 6 parts of curing agent, 10 to 15 parts of pigment, and 10 to 30 parts of glycidyl ether epoxy resin. The glycidyl ether epoxy resin is adopted to produce the printing ink, aliphatic polyamine is further chosen as the curing agent, the acid and alkali resistant performance of the printing ink is strengthened through optimizing the formula, thus the shortage that the colorful laser printing ink is lost when being mixed with acid and alkali is overcome, moreover, the color of the laser printing product is more abundant, and the patterns are more clear.

The invention discloses an insulating tape for a new energy battery and a preparation method of the insulating tape, and relates to the technical field of new energy battery assemblies. The insulating tape for the new energy battery is prepared by coating pretreated glass fiber cloth with a coating, the coating is prepared from the following raw materials in parts by weight: 15 to 20 parts of modified polyimide resin, 2 to 4 parts of epoxy resin E-51, 71 to 77 parts of an ethanol / butanone mixed solvent, 3 to 5 parts of modified nano silicon dioxide, 0.2 to 0.4 part of a silane coupling agent KH-550, 0.1 to 0.3 part of polydimethylsiloxane, 0.1 to 0.2 part of paraffin-based mineral oil and 0.3 to 0.5 part of triethylene tetramine. The glass fiber cloth pretreatment material comprises deionized water and a 5%-8% sodium hydroxide solution. The insulating adhesive tape for the new energy battery contains the modified polyimide resin, so that the high temperature resistance and electrolyte resistance of the adhesive tape can be enhanced, the insulativity is improved, and the modified nano silicon dioxide is good in dispersity. The preparation process is fine, the glass fiber cloth is fully pretreated, the preparation process is standard, and the use requirements of new energy batteries can be met.

The invention provides a high-hydrophobicity anti-pollution flashover coating and a preparation method thereof, and relates to the field of coatings. The silicone rubber composition is prepared from the following raw materials in parts by weight: 80 to 100 parts of hydroxyl-terminated polydimethylsiloxane; 5 to 15 parts of modified nano silicon dioxide; 10 to 30 parts of a composite self-repairing microcapsule; 10 to 25 parts of a flame retardant; 3-8 parts of a cross-linking agent; 0.5-2 parts of a catalyst; 1-5 parts of an accelerant; 40 to 100 parts of a solvent; the modified nano silicon dioxide is fumed silica subjected to surface treatment by a fluorine-containing silane coupling agent and a platinum catalyst; the capsule wall of the composite self-repairing microcapsule is a polylactic acid-glycolic acid copolymer, and the capsule core of the composite self-repairing microcapsule is a mixed solution of a hydroxyl-terminated polydimethylsiloxane oligomer and methyltris (methylethylketoximino) silane. The coating has excellent hydrophobicity, weather resistance and targeted repair function.

The invention discloses an optical paste film and a preparation method thereof, and relates to the technical field of optical functional materials. The optical slurry film is prepared by taking a polyethylene glycol terephthalate film as a base material and coating an optical slurry coating, the optical slurry coating is prepared from the following raw materials in parts by weight: 12 to 16 parts of nano silicon dioxide, 22 to 28 parts of acetone and butanone mixed solvent, 7 to 9 parts of modified titanium dioxide, 4 to 6 parts of nano zirconium oxide, 30 to 35 parts of modified epoxy resin, 18 to 22 parts of butyl acrylate, 4 to 6 parts of dioctyl sebacate, 2.5 to 3.5 parts of silane coupling agent KH-570, 1 to 1.5 parts of organic silicon flatting agent and 0.6 to 1 part of organic silicon defoaming agent. 1.2-1.8 parts of an antioxidant 1010, 3-4 parts of a photoinitiator 184 and 6-8 parts of bis (4-tert-butylphenyl) iodine hexafluorophosphate; the polyethylene glycol terephthalate film pretreatment material comprises absolute ethyl alcohol and deionized water. The raw materials are scientifically proportioned, the titanium dioxide and the epoxy resin are clearly modified, the preparation process is complete, and the finished product is high in light transmittance, good in weather resistance, adaptive to the requirements of the optical field and high in practicability.

The invention relates to the technical field of bolts, and provides a bolt special for stainless steel mechanical equipment and a preparation method thereof. A bolt special for stainless steel mechanical equipment comprises a bolt body and a surface coating, and the surface coating is prepared from, by weight, 100 parts of epoxy resin E-44, 50-55 parts of a curing agent, 1.5-2 parts of a curing accelerator, 20-25 parts of flaky iron oxide, 10-12 parts of modified boron nitride, 2-3 parts of an ultraviolet light absorber, 3-5 parts of silicon dioxide, 1-1.5 parts of a dispersing agent, 25-35 parts of butanone and 10-12 parts of xylene. According to the bolt special for the stainless steel mechanical equipment, the corrosion resistance of the stainless steel bolt in a high-concentration acid-base solution and high-temperature and high-pressure seawater is improved.

The invention relates to a preparation method of a waterborne polyurethane anticorrosive coating, which comprises the following steps: carrying out drying treatment on poly (1, 4-butylene adipate) glycol; the preparation method comprises the following steps: putting polyadipic acid-1, 4-butanediol ester glycol and 2, 2-dimethylolpropionic acid into a reaction container, adding a butanone solution of isophorone diisocyanate and a catalyst, and heating and reacting in an oil bath for 3-5 hours in a nitrogen atmosphere to obtain a prepolymer A; adding the prepolymer B and 4, 4 '-dithiodiphenylamine into a reaction container, adding m-phthaloyl hydrazine, and carrying out reduced pressure distillation on a solvent in a reaction system; adding a certain amount of triethylamine into the reaction container and stirring; and adding a predetermined amount of distilled water, and stirring to obtain the waterborne polyurethane anticorrosive paint. The waterborne polyurethane anticorrosive paint prepared by the invention not only has excellent corrosion resistance, but also can warn the tiny damage of a coating and the local corrosion process of metal at the same time, so that effective protection of a metal material is realized, and the service life of the metal material is remarkably prolonged.

An antifungal composition including a first essential oil, and a second essential oil, where the composition is configured to reduce disease onset, pathogen spread, or a combination thereof. Further, an antifungal compound including one or more aroma compounds selected from 4-(4-hydroxyphenyl)-2-butanone, furaneol, ethyl methylphenylglycidate, ethyl hexanoate, ethyl butanoate, beta-ionone, alpha-ionone, (R)-(+)-limonene, (S)-(-)-limonene, cis-3-Hexen-1-ol, nerol, linalool, 2-heptanone, alpha-terpineol, beta-damascenone, β-caryophyllene, ethyl 2-methylbutanoate, β-myrcene, gamma-octalactone, alpha-humulene, nerolidol, (E,E)-2,4-decadienal, (E,E)-α-farnesene, vanillin, phenylethyl acetate, citral, 3-methylbutan-1-ol, or a combination thereof.

The invention relates to a method for efficiently preparing hydroxylamine hydrochloride. The method comprises the following steps: mixing a diacetylmonoxime solution and a hydrochloric acid solution, pretreating through a pressurized nano-bubble fluidized bed, and carrying out reaction distillation under heating and pressurizing; after the reaction is finished, cooling reaction liquid, performing primary filtration and suction filtration through cross-flow filtration equipment, and collecting hydroxylamine hydrochloride crystals; and washing the crystal with absolute ethyl alcohol, recovering ethyl alcohol through cross-flow filtration equipment, and finally freeze-drying to obtain the high-purity hydroxylamine hydrochloride. The preparation method comprises the following steps: stirring quinoline-8-yl acrylate, tributyltin acrylate, 4-vinyl benzocyclobutene, ethanol and benzoyl peroxide to obtain a mixed solution; immersing the PTFE membrane subjected to low-temperature plasma pretreatment into the mixed solution, and then carrying out ultrasonic cleaning and vacuum drying to obtain a polymer modified PTFE membrane; the hydroxylamine hydrochloride prepared by the method disclosed by the invention has relatively high purity and yield, and meanwhile, the content of heavy metal ions and the content of water are effectively reduced.

The invention relates to the technical field of high polymer materials, and particularly discloses a flame-retardant heat-conducting silica gel insulating coating and a preparation method thereof. The invention discloses a flame-retardant heat-conducting silica gel insulating coating. Comprising the following components: polydimethylsiloxane, aluminum hydroxide, modified nano aluminum oxide, a phosphorus-nitrogen flame retardant, silicon dioxide, methyltris (methylethylketoxime) silane, vinyltris (methylethylketoxime) silane, dibutyltin dilaurate, a diluent, amino propyl triethoxy silane, propyl trimethoxy silane and ethyl aminopropyl trimethoxy silane. And the polydimethylsiloxane is formed by compounding polydimethylsiloxane with the viscosity of 1,500 cp and polydimethylsiloxane with the viscosity of 20,000 cp. According to the invention, by finely blending the proportion of various functional components, especially the optimal combination of polydimethylsiloxane, modified nano aluminum oxide, the flame retardant and the filler, the flame retardance and thermal conductivity of the coating are effectively improved, and meanwhile, good insulativity and mechanical properties are ensured.

The preparation method comprises the following steps: S1, hydrophilic-hydrophobic bi-component modification reaction: dissolving a styrene-maleic anhydride copolymer, hydrophilic polyethylene glycol monomethyl ether and hydrophobic long-chain alkyl alcohol in butanone according to a ratio, adding a catalyst, stirring, reacting, filtering, washing, and drying to obtain the dispersing agent for the lithium battery diaphragm based on the modified benzyl resin micelle. Performing ester exchange reaction on anhydride bonds of the styrene-maleic anhydride copolymer and polyether hydroxyl and alkyl alcohol hydroxyl respectively to obtain a modified intermediate; s2, neutralization reaction: dropwise adding organic alkali into the modified intermediate, and adjusting the pH value to obtain a modified SMA solution containing carboxylate groups; s3, preparing nano-micelles: dropwise adding the modified SMA solution into deionized water, and stirring to enable the modified SMA solution to be self-assembled to form the nano-micelles, so as to obtain nano-micelle dispersion liquid; and S4, dispersing agent forming: stirring the nano-micelle dispersion liquid to remove butanone so as to obtain the water-based dispersing agent.

The invention relates to a method for preparing anhydrous acetaldoxime by a system for co-producing diacetylmonoxime and acetaldoxime, and relates to the technical field of acetaldoxime. The method comprises the following steps: adding diacetylmonoxime, acetaldehyde and a modified TS-1 molecular sieve into a reactor, and reacting to generate crude acetaldehyde oxime; feeding the crude acetaldehyde oxime into an acetaldehyde removal tower for rectification separation; rectifying and separating acetaldehyde tower bottoms to obtain butanone; adding an extracting agent into the tower top acetaldoxime solution, and feeding into a distillation kettle for extraction; the extracted acetaldehyde oxime is fed into an acetaldehyde oxime finished product tower to be further rectified and purified; the preparation method comprises the following steps: reacting a TS-1 molecular sieve, anhydrous toluene and 3-mercaptopropyltrimethoxysilane to obtain a sulfhydrylated TS-1 molecular sieve; the preparation method comprises the following steps: taking a sulfhydrylated TS-1 molecular sieve, tetrahydrofuran, diethyl vinylphosphonate, mercaptododeborane disodium salt and Darocur1173 as photoinitiators, and reacting under the irradiation of 365nm ultraviolet light to obtain the modified TS-1 molecular sieve. The acetaldehyde oxime prepared by the method has higher content and yield.

The present invention relates to the technical field of the preparation of methyl ethyl ketone peroxide, and particularly relates to a preparation method of methyl ethyl ketone peroxide with low water content, which comprises the following steps: (1) adding hydrogen peroxide into a reaction kettle, adding a catalyst and stirring evenly, and then slowly dropping methyl ethyl ketone into the reaction kettle under stirring, and carrying out a reaction after the dropping is completed; (2) after the reaction is completed, adding a water separator into the reaction mixture, standing for stratification, and taking the upper-layer liquid; (3) freezing the upper-layer liquid, filtering the frozen liquid, and adding dimethyl phthalate into the filtrate for dilution to obtain the product. In the preparation method of methyl ethyl ketone peroxide with low water content of the present invention, by adding a freezing treatment process, the synthesized methyl ethyl ketone peroxide is frozen at -30 to -50 °C, greatly reducing the water content of methyl ethyl ketone peroxide. The water content of the prepared methyl ethyl ketone peroxide product is 4-5%, and the active oxygen content is 8-9%. The reaction performance and curing performance are good, and it has high production application value.

This invention discloses a production process for sulfur dioxide-resistant electroplated aluminum and the resulting electroplated aluminum, relating to the field of electroplated aluminum. The production process for sulfur dioxide-resistant electroplated aluminum includes: coating a release coating onto a base film layer to obtain a release layer; coating an imaging coating onto the release layer to obtain a color layer; molding and aluminum plating the color layer to obtain an aluminum-plated layer; and coating the aluminum-plated layer with an adhesive to obtain electroplated aluminum. The imaging coating comprises the following raw materials in parts by weight: 80-100 parts of modified monomeric acrylic polymer, 7-10 parts of isocyanate curing agent, 3-6 parts of highly branched semi-crosslinked polyurethane prepolymer, 0.8-1.5 parts of dispersant, 0.2-0.5 parts of defoamer, 35-50 parts of methyl ethyl ketone (MEK), and 35-50 parts of pentamidine ketone (PHK). The highly branched semi-crosslinked polyurethane prepolymer has a molecular weight of 110,000-120,000 and a softening point temperature of 220-240°C. This application provides electroplated aluminum resistant to sulfur dioxide corrosion.

The application belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of methoxychlorpromazine monohydrochloride monohydrate. The method comprises the following steps: step 1, methoxychlorpromazine base is dissolved in a polar solvent, and hydrochloric acid is added to obtain a mixed solution; step 2, a poor solvent of methoxychlorpromazine monohydrochloride monohydrate is added to the mixed solution, crystallization is carried out, and separation is performed, and methoxychlorpromazine monohydrochloride monohydrate is obtained; the poor solvent is selected from one or a mixture of two or more of isopropyl alcohol, n-butyl alcohol, acetone, butanone, ethyl acetate, butyl acetate, dichloromethane, trichloromethane, toluene, methyl tert-butyl ether, isopropyl ether and diethyl ether. The method has the advantages of simple process, good repeatability, easy operation, high yield, product purity of more than 99.8%, complete compliance with the requirements of European Pharmacopoeia 9.0 and US Pharmacopoeia USP43, and suitability for industrial production.

The invention provides yellow glue resistant to corrosion of a plasticizer and a preparation method of the yellow glue. The yellow glue is prepared from a polyurethane prepolymer, a chloroprene rubber sheet, methyl methacrylate, benzoyl peroxide, an anti-aging agent, butanone, cyclohexane, dimethyl carbonate and tackifying resin. The polyurethane prepolymer is prepared from the following components in parts by weight: 10 to 14 parts of 1, 4-butanediol adipic acid polyester polyol, 4 to 8 parts of polycaprolactone polyol, 1 to 3 parts of diphenylmethane diisocyanate, 0.05 to 0.15 part of 1, 6-hexanediol, 1 to 2 parts of hydroxyethyl methacrylate, 0.01 to 0.03 part of organic bismuth catalyst and 75 to 80 parts of butanone. The polyurethane prepolymer with specific crystallization performance is synthesized through cooperation of polycaprolactone polyol and polyester polyol, and the yellow glue is endowed with excellent plasticizer corrosion resistance and low-temperature activation capacity. Active groups in the polyurethane prepolymer are subjected to graft copolymerization with the chloroprene rubber adhesive and MMA, and a plasticizer-resistant polyurethane chain segment is introduced into a molecular chain of the chloroprene rubber adhesive, so that a hard segment-soft segment alternating block structure is formed, and corrosion resistance and viscoelasticity are both considered.

The application discloses a kind of efficient natamycin purification methods, comprising the following steps: taking two kinds of dichloromethane, chloroform, acetone, butanone, methanol, ethanol, petroleum ether, n-hexane are mixed to obtain mixed solution, adjust the pH of mixed solution to 6.0-7.0, then natamycin crude product is added to mixed solution and stirred into slurry;Slurry is extracted to obtain that natamycin wet product, and the natamycin wet product after extraction is washed with organic solvent;Natamycin wet product after washing is dried, and natamycin purification product is obtained.Compared with prior art, the present application optimizes the existing natamycin purification process, simplifies the natamycin purification method, reduces the production cost, improves the production efficiency, the product purity can reach more than 98%, and the product yield can reach more than 95%.The application has the advantages of less equipment investment, easy operation, less environmental pollution, simple operation, and is suitable for product industrial production.

The invention belongs to the technical field of preparation of febuxostat intermediates, and particularly relates to a preparation method of a febuxostat intermediate. The preparation method comprises the following steps: taking thiourea and ethyl 2-butanone acid ester as raw materials, and carrying out nucleophilic addition-cyclization reaction to prepare 2-amino-4-methylthiazole-5-carboxylic acid ethyl ester; then, the 2-amino-4-methyl thiazole-5-carboxylic acid ethyl ester is subjected to a diazotization reaction, and 4-methyl-5-ethoxy carbonyl thiazole-2-diazonium chloride is obtained; the method comprises the following steps: taking 5-bromosalicylaldehyde and 4-methyl-5-ethoxycarbonyl thiazole-2-diazonium chloride as raw materials, and carrying out coupling reaction under the catalytic action to prepare the febuxostat intermediate. The synthetic route provided by the invention is efficient, economical and environment-friendly, is suitable for industrial production, can meet the market demand, and overcomes the technical defects existing in the preparation of the febuxostat intermediate in the prior art.

The invention belongs to the field of organic synthesis, and discloses a polysubstituted cyclobutanone compound and a preparation method thereof. Comprising the following steps: (1) dissolving a diketone compound, trialkyl phosphite, olefin, a photocatalyst and a reaction solvent in a reaction vessel; carrying out degassing protection by using argon (Ar) or nitrogen; (2) irradiating the reaction solution by using a proper light source, and stirring until the reaction is complete; and (3) after the reaction is completed, recovering the solvent under reduced pressure, and purifying through column chromatography or preparative thin-layer chromatography to obtain the cyclobutanone compound. According to the preparation method of the substituted cyclobutanone compound, the diketone compound is used as the raw material, the synthesis method of the ketene intermediate and the application range of cycloaddition reaction are expanded, and convenience is provided for preparation of various substituted cyclobutanone compounds.

The specification describes a process for the upgrading of ketones, comprising the step of reacting a ketone and hydrogen together in the presence of a catalyst system comprising either a condensation catalyst and a separate hydrogenation catalyst, or a condensation catalyst on which a transition metal is supported. The condensation catalyst is a mixed oxide material comprising aluminium, calcium and optionally magnesium, and has a Ca:(Mg+Al) weight ratio of 0.25 ≤ Ca:(Mg+Al) ≤ 2.5 and a Mg:Al weight ratio of 0 ≤ Mg:Al ≤ 3.0. The process is particularly suitable for the upgrading C3, C4 or C5 ketones such as acetone or butanone.

The invention discloses aquadag for an alkaline battery and application of the aquadag. The aquadag comprises the following raw materials in percentage by weight: 12-16% of graphite powder, 5-8% of conductive carbon black, 1-2% of graphene, 15-18% of epoxy resin, 30-50% of butanone and 10-20% of cyclohexanone. The preparation method of the aquadag comprises the following steps: (1) uniformly stirring butanone and cyclohexanone to obtain a composite solvent; (2) adding solid epoxy resin into the composite solvent, and stirring at 800-1000 rpm to completely dissolve the solid epoxy resin; (3) slowly adding graphite powder and conductive carbon black graphene into the composite solvent, and dispersing at a high speed of 1100-1200 rpm for 45-50 min to obtain a mixture; and (4) carrying out ball milling on the mixture, sieving with a 200-mesh sieve, and discharging to obtain the aquadag. The graphene is doped into the aquadag, so that the technical effect of improving the comprehensive performance of the battery is achieved.

The invention discloses a preparation method of liquid aliphatic secondary amine, which comprises the following steps: 1, carrying out reductive alkylation reaction on aliphatic secondary amine, 3, 3-dimethyl-2-butanone and hydrogen under the action of a platinum-carbon catalyst and a sulfur-containing organic matter; and 2, filtering the reaction mixture, and carrying out vacuum distillation to obtain the target product. According to the method, hydrogen is used as a reducing agent, the process is green and environment-friendly, side reactions are few, and the purity of the prepared aliphatic secondary amine can reach 98% or above. The preparation method comprises the following steps: dissolving trace dimethyl sulfoxide in an ethanol solution to form a dimethyl sulfoxide-ethanol dispersion mixed solution, adding the dimethyl sulfoxide-ethanol dispersion mixed solution into a high-pressure hydrogenation reaction kettle, fully mixing the dimethyl sulfoxide-ethanol dispersion mixed solution with an obtained imine mixture, and adding a platinum-carbon catalyst. The preparation method of the liquid aliphatic secondary amine, which is disclosed by the invention, has the advantages of high catalyst selectivity and strong activity, and is suitable for producing the liquid aliphatic secondary amine.

The invention relates to an electrochemical selective oxidation method of butanone, which is carried out in an electrolysis system and specifically comprises the following steps: (1) an anode chamber of the electrolysis system comprises an anode electrolyte and an anode electrode, and the surface of the anode electrode comprises an anode catalyst; and (2) mixed gas of O2 and butanone is introduced into a cathode chamber of the electrolysis system, two-electron redox reaction is carried out on the surface of a cathode catalyst of a cathode electrode to reduce O2 into H2O2, the generated H2O2 and butanone react on the interface of the cathode catalyst, a target organic compound is selectively generated, and the cathode catalyst comprises a carbon-based material. The invention aims to solve the three core problems of poor selectivity, serious pollution and low safety in the traditional butanone oxidation process, and compared with the traditional strong oxidation process, the method adopts an electrochemical synthesis path, takes electrons as a cleaning reagent, realizes high-precision selective control on the butanone oxidation path, can directionally generate a high-value product, and has the advantages of high product yield and high product quality. And the problems of complex product and difficult separation in the traditional process are fundamentally avoided.

This invention discloses a method for preparing epoxy binder-coated modified magnetic powder, comprising 90-95 wt% modified magnetic powder and 5-10 wt% epoxy binder. The epoxy binder is diluted uniformly with methyl ethyl ketone (MEK) as a diluent, and the volume ratio of MEK to epoxy binder is 10-20. After uniform mixing, the modified magnetic powder is added, and mixing continues while maintaining a stirring temperature of 50-60℃ for 2-4 hours. The mixture is then sieved through a 300-500 mesh nylon sieve to obtain epoxy binder-coated modified magnetic powder. This invention utilizes a two-step coupling agent to modify the magnetic powder, enabling the modified magnetic powder and porous chitosan fine powder to form a good bond and fix within the porous structure, resulting in magnetic powder with low agglomeration, good dispersibility, and good insulation effect, thus meeting the purpose of inductor production and use. The product obtained by this invention has high resistivity and low loss.

The invention relates to the field of alloy steel, and provides a corrosion-resistant bolt and a preparation method thereof. The corrosion-resistant bolt comprises a bolt body and a corrosion-resistant coating sprayed on the surface of the bolt body, and the corrosion-resistant coating is prepared from, by weight, 55-65 parts of epoxy resin, 14-20 parts of an MIO-SiO2 composite material, 10-14 parts of zinc phosphate, 4-6 parts of talcum powder, 6-8 parts of a xylene / butanone mixed solvent, 1-1.4 parts of a dispersing agent, 0.5-1 part of a defoaming agent and 0.5-0.7 part of an ultraviolet light absorber. According to the corrosion-resistant bolt provided by the invention, the corrosion resistance of the bolt is effectively improved.

The application discloses a kind of biological base alcohol type beauty glue and preparation method thereof, it is related to adhesive technical field.The raw material composition of the beauty glue includes biological base polysiloxane, nano zinc oxide, biological base composite mildew inhibitor, hydrophobic fumed silica, titanium acid tetraisopropyl ester, methyl tributyl ketone oxime base silane, nano calcium carbonate, epoxy soybean oil, tea polyphenol;The biological base polysiloxane: raw material includes biological base 1,3-propylene glycol, hydroxyl end-capped polydimethylsiloxane, silane coupling agent;The biological base composite mildew inhibitor: raw material includes lecithin, epsilon-polylysine, tea tree oil, vitamin E.The preparation method of beauty glue includes preparing biological base polysiloxane, preparing biological base composite mildew inhibitor, basic filler dispersion, and preparing beauty glue finished product step.The biological base alcohol type beauty glue prepared in the application has good mildew-proof effect and excellent mechanical properties.

A Pseudomonas putida ω-aminotransferase gene with broad substrate spectrum and an application thereof are provided. According to the disclosure, codon optimization is carried out on an ω-transaminase gene, and the nucleotide sequence of the ω-transaminase gene is shown in SEQ ID NO: 1. The crude enzyme solution, crude enzyme powder and pure enzyme of ω-aminotransferase prepared from ω-aminotransferase gene can be used as an enzyme preparation to catalyze the transamination reaction of substrates to prepare chiral amino alcohols and chiral amines. The substrate spectrum of the recombinant ω-transaminase obtained by the disclosure is broad, and 15 kinds of chiral amino alcohols and chiral amines with high added value are asymmetrically catalyzed and synthesized; in particular, 4-hydroxy-2-butanone is catalyzed to produce pharmaceutical intermediate (R)-3-amino-1-butanol.

The present application relates to a kind of bio-based surface treatment agent and its preparation method, belong to the technical field of treating agent.The raw material of bio-based surface treatment agent provided by the present application includes polyol PE-6056, isocyanate XFLO100, catalyst, CHDI, anti-sedimentation auxiliary agent, solvent, the solvent includes butanone, tetrahydrofuran, acetone, dimethylformamide, cyclohexanone, the bio-based surface treatment agent prepared has good initial adhesion, peeling strength when using, hydrolysis resistance and ageing resistance, with good application prospect.

The invention discloses a synthesis method of a silicon-substituted benzo-bicyclo [3.1. 1] heptane compound, which comprises the following steps: under the action of a copper catalyst, alkali and a silicon reagent, putting o-alkynyl phenyl cyclobutanone in a solvent for reaction, and carrying out post-treatment to obtain the silicon-substituted benzo-bicyclo [3.1. 1] heptane compound, the silicon source is (dimethylphenylsilyl) boronic acid pinacol ester. The silicon-substituted benzo-bicyclo [3.1. 1] heptane compound is prepared by combining a cheap metal copper catalyst with a silicon reagent. The reaction system is good in selectivity and mild in condition, the highest yield can reach 68%, and the method has wide application prospects.

The invention provides a damp-heat aging resistant three-layer waterproof adhesive tape as well as a preparation method and application thereof, and belongs to the technical field of waterproof adhesive tapes. The waterproof screen cloth comprises a screen cloth layer and a waterproof layer which are bonded through a bonding adhesive, the waterproof layer is coated with the TPU hot melt adhesive layer; the laminating glue comprises the following components in parts by weight: 95-105 parts of PU glue, 4-6 parts of precipitated silica, 8-12 parts of an isocyanate curing agent and 60-70 parts of butanone; the TPU hot melt adhesive layer is prepared from the following components in parts by weight: 45 to 60 parts of polyester polyol, 10 to 20 parts of polyether polyol, 20 to 25 parts of diphenylmethane diisocyanate (MDI), 5 to 10 parts of chain extender and the like. The adhesive tape solves the problems that the existing adhesive tape is poor in damp-heat aging resistance and the adhesive strength is easy to decrease by improving the formula of the laminating adhesive of the mesh cloth layer and the waterproof layer and the formula of the TPU hot melt adhesive layer, and has excellent damp-heat aging resistance, stable waterproofness and lasting adhesive strength.