136 results about "Mercaptobenzothiazole" patented technology

The invention relates to a composite reverse osmosis membrane acidic cleaning agent, a preparation method and a cleaning process thereof, and belongs to the technical field of environment-friendly water treatment. The cleaning agent comprises the following components in percentage by mass: 4-8% of inorganic acid, 20-40% of organic acid, 1-3% of a surfactant, 0.5-1% of a chelating agent, 0.5-1% of a compound corrosion inhibitor and the balance of deionized water. The composite corrosion inhibitor is formed by compounding 2-mercaptobenzothiazole and the like according to a specific mass ratio, the molecular weight of polyaspartic acid is 5000, and the molar ratio of Zn to Mo in the zinc-molybdate compound is 2: 1. The preparation method comprises the following four steps: firstly preparing a compound corrosion inhibitor premix, then preparing an acidic base solution, and then sequentially adding the components to finally obtain the cleaning solution. According to the cleaning process, a cleaning agent and deionized water are mixed, the membrane flux recovery rate is larger than or equal to 85% through cleaning of a specific process, the reverse osmosis membrane can be effectively cleaned, and the performance of the reverse osmosis membrane can be recovered.

The invention discloses a copper surface micro-etching coarsening solution for a fine circuit as well as a preparation method and application of the copper surface micro-etching coarsening solution, and relates to the technical field of printed circuit board manufacturing. The copper surface micro-etching coarsening solution for the fine circuit is prepared from, by mass concentration, 60 g / L to 100 g / L of sulfuric acid, 40 g / L to 60 g / L of hydrogen peroxide, 0.5 g / L to 2 g / L of zinc sulfate, 10 g / L to 30 g / L of copper ions, 0.5 g / L to 1 g / L of pyridine heterocycle-containing Schiff base, 10 g / L to 100 g / L of ethyl alcohol, 1 g / L to 3 g / L of 2-mercaptobenzothiazole, 1 g / L to 5 g / L of methionine and 1 g / L to 5 g / L of polyacrylamide. According to the copper surface micro-etching coarsening solution, the 2-mercaptobenzothiazole and the methionine in the copper surface micro-etching coarsening solution can enable the copper surface to form a honeycomb structure under the low micro-etching amount, the zinc sulfate and the pyridine heterocyclic ring-containing Schiff base can form a composite film layer with copper ions on the surface of the honeycomb structure, and the interlayer binding force is improved.

The invention discloses a composite collecting agent and a preparation method and application thereof, and relates to the technical field of solid waste recycling. The composite collecting agent comprises a main agent, an auxiliary agent and a synergist, and the mass ratio of the main agent to the auxiliary agent is (3-1): (1-2). The mass of the synergist is 0.1%-2.5% of the total mass of the composite collecting agent; the structural formula of the main agent is as shown in formula (I): R-O-C (= S)-NH-R '(I); in the formula (I), R is alkyl, and R'is 3-chloro-1, 2-epoxypropane; the auxiliary agent is a mercaptobenzothiazole derivative. The thiocarbamate and the mercaptobenzothiazole derivative are compounded according to a specific proportion for the first time, a Zn-S shielding layer is destroyed through an intermolecular synergistic effect, and the silver recovery rate is increased; the preparation method is simple and easy to operate, facilitates reduction of the dosage of a single agent and reduces environmental pollution. The foam stability is improved, the flotation efficiency is improved, the selective collection efficiency of the silver-zinc ore is remarkably improved, and the flotation index is improved.

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 discloses a thermally stable gas diffusion layer material and a fuel cell, and relates to the field of fuel cells. When the heat-stable gas diffusion layer material is prepared, short-cut polyacrylonitrile carbon fibers are subjected to papermaking and then cured, and 3-aminothiophene is oxidized and grafted to prepare a modified carbon paper base layer; the preparation method comprises the following steps: carrying out a reaction on a single-layer graphene oxide nanosheet, 6-amino-2-mercaptobenzothiazole and 3-aminoethyl thiophene to prepare a modified single-layer graphene oxide nanosheet; the preparation method comprises the following steps: reacting polyvinylidene fluoride powder, 3-allyl thiophene and single-ended vinyl silicone oil to prepare a modified polyvinylidene fluoride emulsion; and uniformly mixing the modified single-layer graphene oxide nanosheet, a modified polyvinylidene fluoride emulsion and isopropanol, spraying on the modified carbon paper base layer, and reacting with 3, 4-ethylenedioxythiophene to prepare the thermally stable gas diffusion layer material. The thermally stable gas diffusion layer material prepared by the method has excellent porosity, thermal stability, conductivity and corrosion resistance.

The invention discloses a manufacturing method of a new energy power battery cooling liquid capable of improving storage stability, and belongs to the technical field of battery anti-freezing solutions, and the new energy power battery cooling liquid comprises the following auxiliary agent components and components: a) ethylene glycol which is used as a basic solvent and accounts for 40-50% of the total mass; b) deionized water accounting for 50%-60% of the total mass; c) an organic corrosion inhibitor which is selected from benzotriazole, mercaptobenzothiazole or a mixture of benzotriazole and mercaptobenzothiazole and accounts for 0.3-0.5% of the total mass; d) an antioxidant which is selected from di-tert-butyl-p-cresol, triphenyl phosphite or a mixture thereof and accounts for 0.1-0.2% of the total mass; the anti-foaming agent is selected from polydimethylsiloxane, silicone oil or a mixture of the polydimethylsiloxane and the silicone oil and accounts for 0.01%-0.05% of the total mass; and f) a pH regulator which is selected from sodium hydroxide, potassium hydroxide or a mixture thereof, is used for regulating the pH value of the cooling liquid to a suitable range of 7-9, and accounts for 0.05-0.15% of the total mass. The cooling liquid disclosed by the invention can keep the stability of key indexes such as conductivity, pH value, corrosion inhibition performance and oxidation resistance in a long-term storage process, so that the storage stability of the cooling liquid is remarkably improved.

The invention discloses a copper-titanium etching solution and a preparation method thereof, and belongs to the technical field of etching solution preparation. The etching solution is prepared from the following components in percentage by mass: 4.5-7.5% of potassium peroxymonosulfate composite salt, 1.2-2.8% of sodium percarbonate, 1.2-2.8% of benzotriazole-2, 3, 4-triazole-2, 3, 4-triazole-2, 3, 4-triazole-2, 3, 4-triazole-2, 3- The cleaning agent is prepared from the following components in percentage by weight: 1.2%-1.8% of 1, 3-dicarboxylic acid, 0.3%-0.8% of 5-aminotetrazole, 0.15%-0.45% of ethylenediamine tetraacetic acid tetrasodium salt, 0.15%-0.45% of hydroxyethylidene diphosphonic acid, 0.15%-0.45% of cocamidopropyl betaine, 0.3%-0.8% of benzotriazole, 0.15%-0.45% of 2-mercaptobenzothiazole, 0.02%-0.08% of poly-N-isopropylacrylamide, 0.7%-1.8% of potassium perchlorate and the balance of ultrapure water. According to the etching solution, the copper-titanium etching rate can be accurately regulated and controlled, back cutting and titanium residues are effectively inhibited, the stability of the etching solution is improved, and the service life of the etching solution is prolonged.

The invention relates to the technical field of silicone rubber, in particular to high-temperature-resistant flame-retardant silicone rubber, a preparation method thereof and a cable, the high-temperature-resistant flame-retardant silicone rubber comprises a gradient layer material composed of a surface layer material, a transition layer material and a core layer material, and the surface layer material comprises methyl vinyl silicone rubber, superfine furnace black, calcium stannate, polyacrylonitrile aerogel and a flame-retardant premix; the transition layer material comprises methyl vinyl silicone rubber, superfine furnace carbon black, spandex fibers, polyarylester, calcium stannate and a flame-retardant premix; the core layer material is prepared from methyl vinyl silicone rubber, superfine furnace black, aramid fiber, polyarylester, phthalonitrile resin and 2-mercaptobenzothiazole zinc salt; wherein the flame-retardant premix is prepared from hydroquinone bis (diphenyl) phosphate, phenyl ethyl aluminum phosphinate and zinc hypophosphite according to the weight ratio of (6 to 10): (2 to 4): (1 to 3); the problems that an existing material is prone to aging in an extreme environment, the flame retardant effect is poor, and the mechanical property is degraded are effectively solved.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention relates to the field of adhesives, and discloses a modified starch-based adhesive and a preparation method thereof, the modified starch-based adhesive comprises modified starch, adipic dihydrazide and borax; the modified starch is prepared by graft copolymerization of modified nano zinc oxide, diacetone acrylamide, diallyldimethylammonium chloride and starch; the modified nano-zinc oxide is prepared by grafting a modified silane coupling agent on the surface of nano-zinc oxide, and the modified silane coupling agent is prepared by performing dehydration condensation on an intermediate prepared by reacting itaconic anhydride and phenyltris (dimethyl siloxane) silane and allylamine to prepare a double-bond grafted intermediate; then, 2-mercaptobenzothiazole, 3-mercaptopropyltriethoxysilane and the double-bond grafted intermediate are subjected to a thiol-ene click reaction, and the adhesive is prepared. According to the invention, the modified starch, the adipic dihydrazide and the borax are added, so that the adhesive is endowed with good adhesive performance, water resistance, heat resistance, antibacterial performance and flame retardant performance.

The invention belongs to the technical field of preparation of copper foils for the electronic industry, and particularly relates to a method for improving the surface corrosion resistance of a copper foil by adopting a 2-mercaptobenzothiazole-cerium composite corrosion inhibitor. The preparation method comprises the following steps: preparing 2-mercaptobenzothiazole; preparing a cerium nitrate solution; preparation of the 2-mercaptobenzothiazole-cerium compound type corrosion inhibitor is carried out; preparing an electro-deposition copper foil; and carrying out corrosion inhibition treatment on the copper foil. According to the method for improving the corrosion resistance of the surface of the copper foil by adopting the 2-mercaptobenzothiazole-cerium composite corrosion inhibitor, the corrosion resistance of the copper foil can be remarkably improved through MBT-Ce corrosion resistance treatment and passivation treatment, so that the service life of the copper foil in a severe environment is prolonged; meanwhile, the surface quality of the copper foil is improved, so that the copper foil is smoother, and subsequent processing and application are facilitated; in addition, the anti-stripping strength value can be improved, so that the adhesive is more durable in the use process; and finally, production efficiency is improved, production cost is reduced, and large-scale production is facilitated.

The invention discloses an acid and alkali resistant fiber and a preparation method thereof, and relates to the field of fiber fabrics. When the acid and alkali resistant fiber is prepared, dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, 1, 3-bis (3-hydroxypropyl)-1, 1, 3, 3-tetramethyldisiloxane and diethyl phosphite are polymerized and then react with 4-vinyl benzoyl chloride and 2-mercaptobenzothiazole in sequence, and modified polyester is prepared; the preparation method comprises the following steps: sequentially reacting microcrystalline cellulose with 3-(chloromethyl)-2-hydroxybenzaldehyde, 4-allylthiosemicarbazide and copper chloride to prepare modified cellulose; the modified cellulose and the modified polyester are mixed and subjected to melt spinning, then perfluoroethylene is used for after-finishing, and the acid and alkali resistant fiber is prepared. The acid and alkali resistant fiber prepared by the invention has durable, flame-retardant and antibacterial capabilities.

This invention discloses an analytical method for benzothiazole contaminants, comprising the following steps: detection by high performance liquid chromatography (HPLC), with the following chromatographic conditions: a phenylhexyl column as the stationary phase, mobile phase A being water, mobile phase B being acetonitrile, and gradient elution; wherein the benzothiazole contaminants are at least one of 2-aminobenzothiazole, 2-hydroxybenzothiazole, benzothiazole, 2-methylbenzothiazole, 2-mercaptobenzothiazole, 2,5-dimethylbenzothiazole, 2-cyanobenzothiazole, ethyl 2-carboxylate benzothiazole, 2-chlorobenzothiazole, 2-bromobenzothiazole, 2-methylthiobenzothiazole, phenylthiocyanate, N-tert-butyl-2-benzothiazole sulfenamide, 2-(2-hydroxyphenyl)-benzothiazole, N-cyclohexyl-2-benzothiazole sulfinamide, dibenzothiazole disulfide, and N,N-dicyclohexyl-2-benzothiazole sulfonamide.

The invention relates to the technical field of metal cleaning aids, and discloses an efficient decontamination acidic metal cleaning agent which comprises the following components in percentage by weight: 12-28% of non-oxidizing acid, 1.5-6% of a corrosion inhibitor, 4-12% of a surfactant, 0.8-3% of a complexing agent, 1.5-5% of a solubilizer, 2-8% of an organic solvent, 3-10% of a pH regulator, 0.1-0.6% of a defoaming agent, 0.2-1.2% of an antirust agent and the balance of deionized water. Through synergistic compounding of organic acid and inorganic acid and combination of a ternary corrosion inhibition system of benzotriazole, mercaptobenzothiazole and imidazoline derivatives, the decontamination efficiency and metal compatibility are remarkably improved, the synergistic effect of citric acid and sulfuric acid enables the corrosion rate of carbon steel to be reduced, meanwhile, the rust-proof time of a copper sheet is prolonged to 72 hours or above, and the rust-proof effect of the copper sheet is improved. The effect is derived from complementation of chelation of organic acid and strong solubility of inorganic acid and directional protection of the corrosion inhibition component on the multi-metal surface.

The utility model relates to a filtering device for recycling MBT resin in the technical field of resin recycling treatment equipment. The filtering device comprises a box body with an opening in the top, a filtering frame is arranged in the box body, the filtering frame is matched with a feeding pipe, an air suction hood is arranged above the box body, the air suction hood is fixedly connected with the box body through a stand column, and the top of the air suction hood is connected with an exhaust pipe; a plurality of sliding blocks are fixedly connected to the top of the filter frame and correspond to the stand columns one to one, vertical first sliding grooves are formed in the faces, corresponding to the sliding blocks, of the stand columns, first vertical telescopic rods are fixed to the bottoms of the first sliding grooves, and the telescopic ends of the tops of the first vertical telescopic rods are fixedly connected with the bottoms of the corresponding sliding blocks. According to the utility model, the structure is simple and reasonable, materials can be efficiently filtered, hot gas or harmful gas can be timely exhausted through the exhaust pipe of the suction cup for additional treatment during filtering, the overflow of the hot gas or harmful gas is reduced, the safety is improved, the filtering frame after filtering is convenient to clean, and the next use is not influenced.

The invention discloses oxidized paraffin and antirust wax and a preparation method thereof, and relates to the field of paraffin. The antirust wax comprises oxidized paraffin, an emulsifier, an antirust agent and water, and the emulsifier is at least one of sorbitan monooleate, lauryl sodium sulfate and fatty alcohol-polyoxyethylene ether; the antirust agent is at least one of cyclohexylamine stearate, alkenyl succinic acid and alpha-mercaptobenzothiazole; the oxidized paraffin is loaded with a Mn metal element through a carrier. The catalyst loaded with the active component Mn is added in the preparation process of the oxidized paraffin, the acid value and the soap value of the oxidized paraffin are effectively increased, the oxidized paraffin interacts with the specific emulsifier and the antirust agent, the emulsifier does not affect the anti-oxidation protection function of functional components, and meanwhile, the antirust agent and the oxidized paraffin cooperate with each other to achieve the anti-corrosion effect in a synergistic mode; and the antirust capability of metal in a humid and hot environment and an acid-base environment is improved, and the application prospect is expanded.

The invention discloses a flotation reagent for copper-molybdenum-gold-silver sulfide ore and a cascade enrichment flotation method for the copper-molybdenum-gold-silver sulfide ore, and relates to the technical field of mineral flotation. A composite inhibitor is formed by compounding nitration modified humic acid and nano silicon dioxide according to the mass ratio, synchronous collection of copper, molybdenum and gold is enhanced under the action of a composite collecting agent, and the flotation efficiency of the copper-molybdenum-gold-silver sulfide ore is improved. According to the composite collecting agent, mercaptobenzothiazole and hydroximic acid are compounded, and the recovery rate of gold and silver is increased through the synergistic effect. The process comprises a mixed flotation stage and a stepped separation stage, and copper-molybdenum-gold-silver concentrate is finally obtained. The method solves the problems of difficult sulfur-noble metal separation and high medicament toxicity in the traditional process, and has the advantages of high efficiency, environmental protection and short process.

To provide a perovskite solar cell that suppresses performance degradation over time caused by moisture.SOLUTION: A perovskite solar cell 1 has, on a substrate 10, a first electrode layer 21, a first carrier transport layer 31, a perovskite layer 40, a second carrier transport layer 32, and a second electrode layer 22 stacked in this order. The main component of the perovskite layer 40 has a perovskite structure and has photoelectric conversion functionality. The perovskite layer 40 contains 2-mercaptobenzothiazole as an additive.SELECTED DRAWING: Figure 1

The application provides a preparation method of an oxygen-containing carotenoid, in particular a preparation method of canthaxanthin (I-a) or astaxanthin (I-b), and the preparation method comprises the following steps: (1) C15-alcohol (II) is reacted with 2-mercaptobenzothiazole (MBT) to prepare C15-benzothiazole sulfide (III), and the C15-benzothiazole sulfide (III) is further oxidized to prepare C15-benzothiazole sulfone (IV); (2) the C15-benzothiazole sulfone (IV) is coupled with C10-dialdehyde (V) to prepare the target product: canthaxanthin (I-a) or astaxanthin (I-b); the method has low raw material cost, avoids the use of phosphorus salt in the traditional synthesis route, and the by-product 2-hydroxybenzothiazole is an important intermediate for synthesizing the herbicide thiobencarb, and also has economic benefits; and the method provides an efficient, economical and environmentally-friendly solution for large-scale clean production of canthaxanthin and astaxanthin.

The present invention discloses a flotation agent for copper, molybdenum, gold, and silver sulfide ores and a cascade enrichment flotation method for copper, molybdenum, gold, and silver sulfide ores, relating to the field of mineral flotation technology. The composite depressant is compounded with nitrated modified humic acid and nano-silicon dioxide in a certain mass ratio. This depressant enhances the simultaneous capture of copper, molybdenum, gold, and silver under the action of a composite collector. The composite collector is compounded with mercaptobenzothiazole and hydroxamic acid, synergistically improving the recovery rate of gold and silver. The process includes a mixed flotation stage and a cascade separation stage, ultimately yielding a copper, molybdenum, gold, and silver concentrate. This process addresses the difficulties in separating sulfur and precious metals and the high toxicity of the reagents in traditional processes, offering the advantages of high efficiency, environmental protection, and a short process.

The invention discloses a complexing inhibitor for inhibiting redissolution of heavy metal sulfide as well as a preparation method and application of the complexing inhibitor. The complexing inhibitor is prepared by compounding the following three components: a component A which is a metal salt, a component B which is an organic sulfur medicament and a component C which is an organic non-sulfur medicament, wherein the mass ratio of the component A to the component B to the component C is (1-2): (1-3): (2-6); the component A is selected from dithiocarbamate, and the component B is selected from at least one of dithiocarbamate, mercaptobenzothiazole or sodium dimethyl dithiocarbamate; and the component C is selected from at least one of chitosan, polyethyleneimine or 1-hydroxyethylidene-1, 1-diphosphonic acid. The inhibitor is especially suitable for preventing excessive sulfur ions from complexing and dissolving precipitated heavy metal sulfide in industrial wastewater treatment, and effectively controlling the concentration of heavy metal ions to rise.

The application discloses a rubber accelerator 2-mercaptobenzothiazole tellurium and a preparation method and application thereof. The 2-mercaptobenzothiazole and the tellurium dioxide are respectively dissolved in solvents to obtain a tellurium dioxide solution and a 2-mercaptobenzothiazole solution; the tellurium dioxide solution is dropped into the 2-mercaptobenzothiazole solution, and a rubber accelerator 2-mercaptobenzothiazole tellurium is obtained by reaction under stirring. The preparation method is simple in operation, has few side reactions and can be carried out at room temperature. The rubber accelerator 2-mercaptobenzothiazole tellurium prepared has a medium speed and is superior to existing thiazole accelerators (M and DM) and selenothiazole accelerators (SeM) in performance.

The invention belongs to the technical field of organic synthesis, and particularly discloses a synthesis method of a 2-mercaptobenzothiazole derivative. The preparation method comprises the following steps: by taking salicylic acid which is cheap and easy to obtain as a raw material, carrying out Curtius rearrangement and intermediate hydrolysis to obtain ortho-aminophenol, and then selectively converting the obtained ortho-aminophenol into ortho-aminophenyl phenol trifluoromethanesulfonate; and finally, carrying out ring closing on the 2-mercaptobenzothiazole and potassium ethyl xanthate under a heating reflux condition to obtain the 2-mercaptobenzothiazole. The method has the advantages of mild reaction conditions, wide raw material sources, no need of high-toxicity sulfur-containing intermediates such as carbon disulfide or thiophosgene, and no need of an oxidant in the post-treatment process.

A battery recycling method removes impurities to ensure production of battery-grade materials. The method includes removing cadmium (Cd) from a pregnant leach solution before recovering valuable battery metals such as nickel (Ni), manganese (Mn), cobalt (Co), and lithium (Li). The removal of the Cd may be performed by precipitating an insoluble organo-complex by adding an organic compound material to the pregnant leach solution. The organic compound material may include one or more of organosulfur, organothiophosphate, benzothiazole compounds or derivatives, such as dithiophosphinate, dithiophosphate, and mercaptobenzothiazole, respectively.

The utility model discloses equipment for recycling an accelerator through back extraction, which relates to the technical field of rubber vulcanization accelerator MBT (2-mercaptobenzothiazole) recycling equipment and comprises a reaction tower, the top of the reaction tower is communicated with a first liquid inlet pipe and a first liquid outlet pipe, and the bottom of the reaction tower is communicated with a second liquid inlet pipe and a second liquid outlet pipe. A first liquid distributor and a second liquid distributor are also arranged in the reaction tower, a plurality of baffle plates are arranged between the first liquid distributor and the second liquid distributor, the baffle plates are used for changing the flow direction of liquid, and any two adjacent baffle plates are opposite in the direction of changing the flow direction of the liquid. By utilizing the characteristics that methylbenzene and alkali liquor in methylbenzene mother liquor are immiscible and large in density difference, two material solutions are in natural countercurrent contact in the reaction tower, and the mixing degree of the solutions is increased through the liquid distributor and the baffle plate, so that the mass transfer and reaction efficiency in the reaction process is enhanced.

A coating composition comprising a resin component comprising an epoxy resin, a corrosion inhibitor comprising one or more thiol groups, and an alkyl ester of phosphoric acid, wherein the corrosion inhibitor comprising one or more thiol groups is or comprises a thiazole, an azole thiol, a trithiocyanuric acid, or a salt thereof, and wherein the resin component is substantially free of water. Use of an alkyl ester of phosphoric acid as stabilizer for such resin component, and a metal substrate at least partly coated with a coating layer deposited from such coating composition, wherein the corrosion inhibitor comprising one or more thiol groups comprises 2-mercaptobenzothiazole, 2,5-dimercapto-1,3,4-thiadiazole, a salt of 2,5-dimercapto-1,3,4-thiadiazole, or a combination of two or more thereof.

The invention belongs to the technical field of heterocyclic compounds, and particularly relates to a method for recovering 2-mercaptobenzothiazole from cephalosporin active ester production mother liquor. The recovery method comprises the following steps: (1) distilling the cephalosporin active ester production mother liquor to obtain a heavy fraction; adding methanol and an antioxidant into the heavy fraction, adjusting the pH value, and reacting to obtain a suspension; and (2) refining the suspension to obtain a destaining solution, heating the destaining solution, adding water, then adjusting the pH value, carrying out heat preservation crystallization, and carrying out hot filtration after crystallization is completed to obtain the 2-mercaptobenzothiazole. According to the invention, the antioxidant prepared from the main antioxidant 2, 2, 6, 6-tetramethylpiperidine-1-oxygen free radical, oleic acid mercaptoethyl ester and 4-dimethylaminopyridine is added, so that oxidation of 2-mercaptobenzothiazole is inhibited in multiple mechanisms, stable existence of 2-mercaptobenzothiazole in the reaction and crystallization process is ensured, and the stability of 2-mercaptobenzothiazole is ensured. The conversion into byproducts such as dibenzothiazyl disulfide is avoided, so that the recovery rate and the purity of the MBT are improved.

The invention relates to the technical field of lubricating oil, in particular to a new energy commercial vehicle gearbox lubricating oil composition and preparation and application thereof. The lubricating oil composition comprises an extreme pressure anti-wear agent and a copper corrosion inhibitor in a weight ratio of (4-15): 1; the anti-wear reagent at extreme pressure is at least one of alkyl phosphite, isooctyl acid phosphate octadecylamine salt, triphenyl phosphate, calcium pentadecyl borate and boronized thiophosphate amine salt; the copper corrosion inhibitor is at least one of a triazole derivative, a sulfur-nitrogen heterocyclic ring, 2-mercaptobenzothiazole and azacyclobutanedioic anhydride. The lubricating oil composition suitable for the gearbox of the new energy commercial vehicle has excellent motor material compatibility, electrical performance, copper corrosion protection, bearing performance and thermal oxidation stability, and provides excellent compatibility and lubricating protection performance for a gearbox system of the new energy commercial vehicle.

The invention discloses an ultraviolet curing type transparent flame-retardant chemical coating and a preparation method thereof, and belongs to the technical field of coatings. The ultraviolet curing type transparent flame-retardant chemical coating is prepared from the following components in parts by mass: 80 parts of photosensitive resin, 4 to 6 parts of a toughening agent A, 14 to 16 parts of a toughening agent B, 4 to 6 parts of a flame retardant, 4 to 6 parts of a photoinitiator, 0.5 to 2 parts of an adhesion promoter, 0.3 to 0.5 part of a de-foaming agent, 0.06 to 0.08 part of a polymerization inhibitor and 40 to 50 parts of a diluent, epoxy acrylate is adopted as the photosensitive resin; the toughening agent A is obtained by polymerizing 2-allylsulfydryl-1, 3-benzothiazole, 4-acetyl phenyl acrylate and butyl acrylate, and the toughening agent B is obtained by polymerizing 2-allylsulfydryl-1, 3-benzothiazole, 4-acetyl phenyl acrylate and butyl acrylate; the toughening agent B adopts phenolic group terminated polydimethylsiloxane; the flame retardant is obtained by carrying out a reaction on allyl-1, 3-sultone and furyl phosphaphenanthrene.

The present invention relates to a self-lubricating ethylene propylene diene monomer rubber and its preparation method and application. The components and their mass parts are as follows: ethylene propylene diene monomer rubber: 100 parts, fast extrusion carbon black: 50 - 80 parts, paraffin oil: 5 - 40 parts, ester plasticizer: 2 - 5 parts, oleic acid amide: 12 - 20 parts, zinc oxide: 4 - 6 parts, stearic acid: 1 - 3 parts, 2-mercaptobenzothiazole: 0.5 - 2 parts, zinc dibutyldithiocarbamate: 0.5 - 2 parts, tetramethylthiuram disulfide: 0.5 - 1 part, tetramethylthiuram tetrasulfide: 0.5 - 1 part, sulfur: 0.5 - 2 parts. The product of the present invention will exhibit a self-lubricating effect in a very short time. In a dynamic use environment, even when the lubricant is continuously consumed, it can still quickly, long-term, and continuously precipitate the lubricant to ensure a continuously low friction resistance effect in the dynamic environment.