248 results about "Isocyanic acid" patented technology

The invention discloses a preparation method and application of a conductive polypyrrole compound. The preparation method comprises the following steps: (1) preparing an emulsion system; (2) adding an oxidizing agent; (3) diluting and dropwise adding monomer pyrrole, and reacting for 6-24 hours; and (4) washing the product, and applying the product to preparation of the foamed conductive polyurethane foam. Comprising the following steps: 1, filtering a conductive polypyrrole compound; 2, carrying out synthesis post-treatment on the conductive polypyrrole compound; 3, effectively mixing the polypyrrole compound with a commercial polyurethane foaming component (firstly premixing with an isocyanate-containing component or a polyol-containing component, and then effectively mixing with another polyol-containing component or an isocyanate-containing component); and 4, carrying out one-time forming foaming to obtain the conductive product. The preparation method has the advantages that better dispersion can be realized by synthesizing the conductive polypyrrole compound which is microcosmically in a nano-scale dendritic shape, and the use amount of a conductive material is reduced; the foamed conductive polyurethane foam is simple and convenient to construct, can be foamed instantly, has high foaming rate, retains the original mechanical properties by more than 50%, and has good conductivity.

Provided herein is a process for preparing compound A comprising (a) admixing 2-isopropyl-4-methylpyridin-3-amine (Compound B), or a salt thereof, a first base, and a reactive compound comprising phosgene or a phosgene equivalent in an organic solvent to form 3-isocyanato-2-isopropyl-4-methylpyridine (Compound C); (b) admixing Compound C and 2,6-dichloro-5-fluoronicotinamide (Compound D) to form 2,6-dichloro-5-fluoro-N-((2-isopropyl-4-methylpyridin-3-yl)carbamoyl)nicotinamide (Compound E); and (c) admixing Compound E and a second base to form a product mixture comprising Compound A and the second base. Also provided herein is a process for synthesizing AMG 510 comprising using Compound A prepared according to the disclosed processes

The invention relates to the field of plastic bags, and discloses a biodegradable plastic bag and a preparation method thereof, the biodegradable plastic bag comprises polylactic acid, poly (butylene adipate-co-terephthalate), a functional additive, modified starch, a lubricant and an antioxidant; the functional additive is prepared by grafting hydroxylated modified castor oil and isocyanated montmorillonite loaded titanium dioxide; the hydroxylation modified castor oil is prepared by modifying castor oil with chloroethyl isocyanate, then reacting with N-allylimidazole, and then reacting with 6-mercaptohexyl-1-alcohol; the isocyanated montmorillonite loaded titanium dioxide is prepared by reacting montmorillonite loaded titanium dioxide obtained by a sol-gel method with isophorone diisocyanate; the modified starch is prepared by reacting octadecanoyl chloride and acryloyl chloride with starch, then carrying out graft copolymerization with ethyl acrylate and further introducing glycidyl methacrylate, so that the plastic bag is endowed with excellent mechanical properties, biodegradability and antibacterial property.

The invention discloses a method for preparing dimethyl carbonate through reaction of CO and methyl nitrite, belongs to the technical field of preparation of dimethyl carbonate, and aims to solve the problem that in the prior art, in the process of preparing dimethyl carbonate through catalysis of reaction of CO and methyl nitrite, the reaction time is short. The preparation method specifically comprises the following steps: in an inert gas atmosphere, mixing and stirring isocyanatopropyltriethoxysilane and N, N-dimethylformamide, raising the temperature of a reaction system to 50-60 DEG C, carrying out a reaction for 1-2 hours, and carrying out a reaction for 1-2 hours, so as to obtain a reaction solution; and 3-aminopropionic acid is added into the reaction system. According to the method, silicon-aluminum coating, potassium modification and 18-crown-6-ether modification are sequentially performed after a halogen-free palladium-copper catalytic system is prepared, so that the conversion rate of impurities and the chromatic value of a product are reduced, the conversion rate of methyl nitrite is effectively increased, and the service life of the catalyst is effectively prolonged.

The invention relates to the technical field of high polymer materials, and discloses a wear-resistant and anti-slip plastic tray and a manufacturing method thereof. Comprising the following steps: S1, adding polytetrahydrofuran glycol and dihydroxyl-terminated polysiloxane into acetone, uniformly stirring, heating to 65-70 DEG C, adding isophorone diisocyanate and a tin catalyst, and stirring for 2-3 hours to obtain an isocyanato-terminated polyurethane prepolymer; adding a branching agent, reacting for 2-3 hours at the temperature of 60-70 DEG C, adding hydroxyethyl methylacrylate, stirring and reacting until the content of isocyanate groups in the system is not changed any more, and carrying out rotary evaporation to remove the solvent, so as to obtain modified polyurethane acrylate; s2, taking urethane acrylate, a photoinitiator, modified urethane acrylate, modified silicon dioxide and a diluent, and uniformly stirring to obtain a wear-resistant antiskid coating; and S3, the outer surface of the tray base body is coated with the wear-resistant and anti-skid coating, curing is conducted, and the wear-resistant and anti-skid plastic tray is obtained.

The invention discloses a single-component polyurethane liquid glue which comprises a hydroxyl-terminated polyurethane prepolymer, polyol and isocyanate, and the molar ratio of an isocyanate group to a hydroxyl group is (1.01-5): 1; the hydroxyl-terminated polyurethane prepolymer comprises aliphatic or / and alicyclic isocyanate and polyol, and the molar ratio of an isocyanate group to a hydroxyl group is (0.5-0.99): 1. The preparation method comprises the following steps: firstly, synthesizing a hydroxyl-terminated polyurethane prepolymer, and then taking the hydroxyl-terminated polyurethane prepolymer as a main material to react with a small part of polyhydric alcohols and isocyanate. The polyurethane liquid adhesive synthesized by the two-step method has the performance advantages of high initial adhesion and low hardness, meets the process requirement of normal-temperature coating, can replace an adhesive film product and a hot melt adhesive product, and is applied to composite bonding of fabrics in the textile industry.

The invention discloses a phenolic resin material as well as a preparation method and application thereof in 3D printing, and relates to the technical field of high polymer materials. When the phenolic resin material is prepared, hydroxylated carbon nanotubes react with isocyanate propyl triethoxy silane to prepare pre-modified carbon nanotubes, and then the pre-modified carbon nanotubes react with 2-chloroethyl triethoxy silane to prepare modified carbon nanotubes; the preparation method comprises the following steps: reacting vanillin with 5-amino-1, 2-dihydro-2-methyl-3H-1, 2, 4-triazole-3-thioketone and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in sequence, so as to obtain pre-modified vanillin; reacting the pre-modified vanillin with divinyl disulfide to obtain modified vanillin; the modified vanillin, phenol and formaldehyde react to prepare modified phenolic resin, and then the modified phenolic resin reacts with the modified carbon nanotubes to prepare the phenolic resin material. The phenolic resin material prepared by the invention has good flame retardance, heat resistance, aging resistance, self-repairing property and mechanical property.

The invention belongs to the technical field of coatings, and particularly relates to a two-component flexible road marking coating and a preparation method thereof. The two-component flexible road marking coating comprises a component A and a component B in a mass ratio of (2.5-3): 1, wherein the component A comprises 5-10 parts of bisphenol epoxy resin with the epoxy value of 0.4-0.55, 40-50 parts of polymer dihydric alcohol, 0.1-0.3 part of a catalyst, 10-15 parts of pigment, 15-20 parts of filler, 5-10 parts of an anti-skid material, 25-35 parts of internally mixed glass beads, 0.5-1 part of a dispersing agent, 0.5-1 part of a defoaming agent, 3-5 parts of a plasticizer and 30-60 parts of a solvent; the component B is a curing agent composed of modified isocyanate and an isocyanate tripolymer according to the mass ratio of (5-8): 1; the modified isocyanate is a compound which is prepared by carrying out hydrosilylation reaction on unsaturated isocyanate and siloxane with a silicon atom number of 2-4 and a hydrogen-containing terminal, and two ends of the modified isocyanate are isocyanato; the coating has excellent brittle fracture resistance, water resistance and wear resistance at low temperature.

The invention relates to a preparation method of a PET composite film, and belongs to the technical field of photovoltaic packaging assemblies. The preparation method of the PET composite film comprises the following steps: carrying out corona on the surface of the PET film; roller-coating a PVB (Polyvinyl Butyral) adhesive and drying; and hot-pressing and compounding with a flexible packaging adhesive film. The PVB adhesive contains a silane coupling agent of which the content is less than 10wt%. Particularly, when the silane coupling agent contains an amino group or an isocyanate group and the dosage of the silane coupling agent is 0.09-1.5 wt%, the bonding strength between the PET film and the flexible packaging adhesive film can be remarkably improved.

The invention discloses a low-free-monomer solvent-free polyurethane adhesive for aluminum-plastic compounding, which belongs to the technical field of chemical building materials, and is characterized in that the number of isocyanate groups contained in a prepolymer is reduced by improving a formula, so that the viscosity of the prepolymer is reduced, the adhesive is easier to spread and level on the aspect of a base material, and the service life of the adhesive is prolonged. Aromatic polyester polyol and modified polyether polyol with a core-shell structure are introduced, so that the high temperature resistance of the adhesive can be effectively improved, the adhesive is suitable for compounding of various plastic films and aluminum foils, the core-shell structure can increase the strength of the polyurethane adhesive, slippage is generated through the core-shell structure, stress is dispersed, and the adhesive has good adhesion. The adhesive is prevented from losing efficacy under pressure, so that the adhesive is suitable for compounding various plastic films and aluminum foils, and the bonding strength of the adhesive is improved.

The invention relates to the technical field of high-conductivity silver paste, in particular to low-solid-content high-conductivity silver paste for wind power generation and a preparation method of the low-solid-content high-conductivity silver paste. The invention discloses low-solid-content high-conductivity silver paste for wind power generation. The low-solid-content high-conductivity silver paste comprises the following substances in parts by weight: 20-50 parts of a conductive material; 3-5 parts of a blocked isocyanate curing agent; 3 to 10 parts of polyurethane; 58-70 parts of a solvent; 1-5 parts of a functional additive; the conductive material comprises silver coated copper powder and flake silver powder. The low-solid-content design is adopted, the cost is remarkably reduced, meanwhile, a composite conductive system of the silver-coated copper powder and the flaky silver powder is introduced, the low cost of the silver-coated copper powder and the high conductivity of the flaky silver powder are utilized, and the conductive performance is maintained while the silver consumption is reduced. Meanwhile, a low-temperature curing system is formed by combining polyurethane resin and a blocked isocyanate curing agent, the problem that an epoxy base material is damaged by high-temperature sintering of traditional silver paste is solved through the flexibility of polyurethane and the low-temperature reaction activity of the curing agent, and the vibration fatigue resistance of the coating is improved.

The invention relates to the field of pipes, and discloses a high-strength CPVC pipe and a preparation method thereof.The pipe comprises CPVC resin, modified multi-walled carbon nanotubes, modified nano silicon dioxide and auxiliaries; the modified multi-walled carbon nanotubes are prepared by grafting phosphorus-containing cardanol derivative based benzoxazine and oxidized multi-walled carbon nanotubes; phosphorus-containing cardanol derivative benzoxazine reacts with 1, 5-naphthylenediamine to prepare an aldehyde cardanol intermediate, the aldehyde cardanol intermediate is prepared by reacting paraformaldehyde with hydrogenated cardanol, the obtained cardanol derivative and DOPO are subjected to addition, and then the obtained phosphorus-containing cardanol derivative reacts with paraformaldehyde and 3-aminopropyltriethoxysilane to prepare the flame retardant. The modified nano silicon dioxide is prepared by introducing polyethylene glycol into the surface of isocyanated nano silicon dioxide and grafting with 3, 5-bis (tert-butyl)-4-hydroxybenzene propionyl chloride, and the pipe prepared by the invention is high in tensile strength and impact strength and has good long-acting oxidation resistance, high temperature resistance and flame retardance.

The invention belongs to the technical field of marine corrosion protection, and particularly relates to a multi-metal flushing corrosion inhibitor and a preparation method thereof, benzotriazole and isocyanate propyl triethoxy silane or isocyanate propyl trimethoxy silane are used as raw materials, and a novel benzotriazole corrosion inhibitor containing a silane structure is synthesized through catalysis. The benzotriazole containing the silane structure is compounded with corrosion inhibitors such as organic acid salt, organic acid polymer and organosilane to form the multi-metal flushing corrosion inhibitor for steel, aluminum alloy and copper, which does not contain nitrite, phosphate and heavy metals (lead, cadmium and mercury). When in use, the corrosion inhibitor is diluted to 0.2-0.5%, the corrosion inhibitor is applied to flushing protection of offshore drilling platforms, marine investigation equipment and coastal facilities through flushing and spraying processes, a corrosion inhibitor protective film is formed on the basis of removing a surface salt film, corrosion of multiple metals such as steel, aluminum alloy and copper alloy in a marine atmospheric environment is effectively inhibited, and the corrosion inhibitor has good environmental friendliness.

The invention relates to the field of road asphalt, and discloses high-modulus modified asphalt for improving road performance and a preparation method thereof, the modified asphalt comprises matrix asphalt, coal liquefied asphalt, modified rubber seed oil, ethylene-vinyl acetate copolymer and modified carbon nanotubes; the modified rubber seed oil is prepared from epoxy rubber seed oil and a carboxylated flame-retardant component prepared by reaction of amino trimethylphosphonic acid, trimethylolpropane and malonic acid; the modified carbon nano tube is prepared from a toluene-2, 4-diisocyanate isocyanated carbon nano tube and an aminated modifier through a reaction; the amination modifier is prepared by performing acylating chlorination grafting on 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid by using thionyl chloride and then grafting with p-phenylenediamine. According to the invention, the coal liquefaction asphalt, the modified rubber seed oil, the ethylene-vinyl acetate copolymer and the modified carbon nanotube are added into the matrix asphalt; the high and low temperature performance, the flame retardant performance and the anti-aging performance of the asphalt material can be improved.

The application provides a two-component polyurethane sealant suitable for automobile headlight structure bonding and a preparation method thereof, and relates to the technical field of polyurethane sealants. The two-component polyurethane sealant comprises component A and component B, and the mixing mass ratio of the component A and the component B is 1:1 to 1:5. The component A comprises the following raw materials: isocyanate group terminated organic silicon modified polyurethane prepolymer 80-120 parts, powder filler 15-40 parts, and auxiliary agent 0.5-2 parts. The component B comprises the following raw materials: polyol 100-160 parts, powder filler 50-200 parts, catalyst 0.01-0.1 parts, and auxiliary agent 0.1-20 parts. The polyurethane sealant prepared by using single-end double-hydroxyl alkyl polydimethylsiloxane composite polyol for the first time has better water resistance, better bonding force on low surface energy material (PP), better cold and hot impact resistance, better ultraviolet aging resistance, better elongation at break, and better shock resistance.

The present invention relates to the field of polyurethane technology, and discloses a carbon nanotube synergistic flame-retardant modified waterborne polyurethane coating and a preparation method thereof. The hydroxyl groups of the acidified carbon nanotubes serve as polymerization reaction sites, and 4,4'-methylenebis(phenyl isocyanate) and triphenylenediamine-based PEPA are subjected to an in-situ graft polymerization reaction to obtain PEPA-based polymer-grafted carbon nanotubes through covalent bonding. After polymer grafting modification, the carbon nanotubes have better compatibility with the waterborne polyurethane matrix and excellent dispersibility, thus playing a better reinforcing role and significantly improving the tensile strength, elongation at break, and tensile modulus of the polyurethane film. The grafted polymer molecular chain contains a PEPA phosphate flame-retardant structure and a urea-based nitrogen-containing structure, as well as a high-carbon triphenyl aromatic ring structure, forming a nitrogen-phosphorus-carbon expansion flame-retardant system, which enables the polyurethane to exhibit excellent flame retardant properties.

The application discloses a catalyst for isocyanate borohydration reaction and a preparation and application method thereof. When the catalyst is used for catalyzing the borohydration reaction of isocyanate and borane to synthesize borate, the catalyst has high catalytic activity, mild reaction conditions (the reaction can be carried out at room temperature), short reaction time, high product yield (≥99%), and the reaction is simple, controllable, and simple in post-treatment.

This invention belongs to the field of pharmaceutical chemical synthesis technology, specifically relating to a method for preparing dicyandiamide by urea pyrolysis with anti-scaling properties. The method includes a reaction process using urea, alkaline earth metal oxides, and a scale inhibitor dopant as raw materials. The scale inhibitor dopant includes at least one of silicon dioxide and titanium dioxide, and its weight accounts for 0.1% to 5% of the weight of the alkaline earth metal oxides. Experiments show that introducing a scale inhibitor dopant into the reaction system can alter the surface tension of the isocyanate melt, helping to improve the surface properties and rheological state of the intermediate melt. This reduces material adhesion and aggregation on the reactor wall, lowers the risk of scaling and clogging, and may even eliminate scale buildup on the reactor wall, thereby improving the stability of continuous production.

The invention provides a degradable fiber temporary plugging agent and a preparation method thereof, and belongs to the technical field of oil-gas field development. The temporary plugging agent is composed of polylactic acid-polyurethane block copolymer fibers, and the preparation method of the temporary plugging agent comprises the steps that S1, lactide and an initiator containing dihydroxyl are subjected to ring opening polymerization under the action of a first catalyst, and a hydroxyl-terminated prepolymer is formed; s2, reacting the prepolymer with diisocyanate under the action of a second catalyst to synthesize a polylactic acid-polyurethane block copolymer; s3, preparing fibers through a melt spinning or electrostatic spinning process; the degradation rate and the mechanical property of the fiber can be regulated and controlled by regulating and controlling the initiator type, the diisocyanate type, the isocyanato index R value and the catalyst dosage, so that the fiber is suitable for the wide-temperature-range reservoir conditions of 45-120 DEG C, and the technical problems of contradiction between the strength and the degradability, narrow temperature adaptability, secondary damage to the reservoir and the like of a traditional temporary plugging agent are effectively solved.

The invention discloses a polyurethane composite material with a functional cross-linked network structure based on a waste PET (Polyethylene Terephthalate) depolymerization monomer and a preparation method of the polyurethane composite material. The preparation method comprises the following steps: by utilizing a polyhydroxy structure of a functional filler, reacting a coupling agent isocyanate propyl triethoxy silane with a waste PET depolymerization monomer bis (2-hydroxyethyl) terephthalate to prepare a functional polyurethane cross-linking agent; according to the invention, organic-inorganic hybridization can be fully realized, and due to relatively small particle size distribution and excellent dispersion stability, the filler can be uniformly dispersed in a polyurethane matrix, so that the interfacial compatibility of the filler and polyurethane is improved, the interfacial interaction is enhanced, and the filler can directly participate in the synthetic reaction of polyurethane through an in-situ polymerization method; and a cross-linked network structure is formed in the polyurethane, so that the polyurethane is endowed with good mechanical properties, electric conduction, heat conduction, electromagnetic shielding effect and the like.

The application relates to the technical field of organic synthesis, and discloses a synthesis method of benzthiazuron, which comprises the following steps: step 1, addition reaction of alpha-methyl styrene and hydrogen chloride gas, and degassing to obtain a first reaction liquid; step 2, substitution reaction of the first reaction liquid and cyanate in the presence of a zinc chloride catalyst, and filtration to obtain a second reaction liquid containing isocyanate; and step 3, construction of an inorganic salt aqueous solution system with a density of 1.05-1.10 g / ml and a pH of 9-10, dropwise addition of the second reaction liquid into the system for condensation reaction with o-chlorobenzylamine, and post-treatment and refinement to obtain a target product. The non-phosgene route of chloro-isocyanate substitution is adopted, and the use of the toxic phosgene is completely avoided; the salting-out effect and interface control generated by the specific high-density salt solution effectively inhibit the isocyanate hydrolysis side reaction, and the reaction yield and product purity are obviously improved.

This invention relates to the field of thin-film optics, and particularly to a protective film. To address the problem of light stabilizer precipitation at high concentrations, this invention provides a protective film. The protective film sequentially comprises an anti-glare film, an adhesive layer, and a barrier film; the adhesive layer is formed from an adhesive layer coating liquid; the adhesive layer coating liquid comprises an acrylate copolymer, a light stabilizer, an isocyanate curing agent, and a solvent; the light stabilizer has isocyanate groups. The light stabilizer in the adhesive layer of the protective film will not precipitate or migrate.

The invention discloses a transparent polyurethane elastomer as well as a preparation method and application thereof, and the preparation method comprises the following steps: reacting diisocyanate with polyester polyol under the action of a catalyst to generate an isocyanato-terminated polyurethane prepolymer; and reacting the polyurethane prepolymer with 2, 2 '-dithiobis (acethydrazide) in a first solvent, evaporating the first solvent, and curing to generate the transparent polyurethane elastomer. Through multiple synergistic effects of increasing molecular entanglement, inhibiting hard phase aggregation, promoting supramolecular network crosslinking, a compact hydrogen bond network and a high-hardness hard domain, the polyurethane elastomer has excellent mechanical strength and toughness and has certain self-repairing performance.

This invention relates to a waterproof coating for walls and its preparation method, belonging to the field of coating technology. The waterproof coating of this invention is prepared from the following components: 50-53 parts by weight of epoxy resin, 75-81 parts by weight of curing agent, and 8.5-11.5 parts by weight of waterproof filler. The waterproof filler is prepared by the following steps: reaction of epoxidized nano-silica with the nucleophilic reagent p-aminophenyl POSS, ring-opening and polymerization of N-acid anhydride, and modification with ethyl isocyanate. This invention uses epoxy resin as the film-forming substance and constructs a waterproof system by adding waterproof filler to prepare a waterproof coating suitable for application on walls. It can achieve a relatively ideal waterproof effect without the need for additives, effectively blocking the intrusion of water, and the coating has a low water absorption rate.

The present invention discloses an aerosol can internal mixing two-component polyurethane foam sealant, its preparation method and device, which includes a single-component polyurethane foam sealant component. The curing component includes a curing agent and a curing catalyst. After the single-component polyurethane foam sealant component is mixed with the curing component, the isocyanate group content is 2% - 10%. Due to the introduction of the curing component, after the curing component is mixed with the single-component polyurethane foam sealant component and extruded, the dependence of the foam on the environmental temperature and humidity during the curing process is greatly reduced, and it can also cure quickly under low temperature and low humidity, expanding the temperature and humidity range for the use of the glue. By introducing the curing component, the physical properties of the foam after mixing and curing have been significantly improved. It not only has high tensile bond strength and compressive strength; at the same time, the cell structure is fine, the closed-cell rate is high, and it has better heat insulation and waterproof properties; therefore, the present invention can be applied to fields with higher performance requirements, expanding the application fields.

The invention discloses a heat-preservation, sound-insulation and moisture-proof composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The heat-preservation, sound-insulation and moisture-proof composite material is prepared from the following raw materials in parts by weight: 60 to 65 parts of PVC (Polyvinyl Chloride), 15 to 20 parts of SBS (Styrene Butadiene Styrene), 2 to 5 parts of plasticizer, 8 to 12 parts of modified flexibilizer, 1 to 2 parts of anti-aging agent, 2 to 5 parts of modified coupling agent, 8 to 10 parts of ceramic hollow microbeads, 5 to 8 parts of nano silicon dioxide and 5 to 10 parts of flame retardant. The modified toughening agent is prepared by reacting 1, 4-benzene diboronic acid with polyethylene glycol to generate a hyperbranched product; and then reacting with 4, 4 '-methylene bis (phenyl isocyanate) to obtain the product. The prepared heat-preservation, sound-insulation and moisture-proof composite material has excellent impact resistance and heat-preservation, sound-insulation and moisture-proof performance.

The application relates to the field of protective films and discloses a liquid crystal light guide plate high-transmittance tpe protective film and a preparation method thereof, which comprises SEBS, polypropylene, modified halloysite nanotubes, modified silicon dioxide and an additive; the modified halloysite nanotubes are prepared by the following steps: reacting a functional additive, which is prepared by grafting an isocyanate-oxidized antioxidant component and a modified benzothiazole-containing monomer, with 3-chloropropyl trimethoxysilane, and then grafting on the surface of the halloysite nanotubes; the isocyanate-oxidized antioxidant component is obtained by the following steps: reacting 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and N-hydroxymethyl acrylamide, and then reacting with 2-mercaptoethanol; and then, the isocyanate-oxidized antioxidant component is reacted with isophorone diisocyanate; the modified benzothiazole-containing monomer is prepared by the following steps: reacting 2-aminobenzothiazole and bromoacetyl bromide, and then reacting with 3,5-dihydroxybenzylamine; and the protective film prepared by the application has good heat-oxygen aging resistance, antibacterial property, heat resistance and tensile property.

The invention belongs to the technical field of catalysts, and discloses a mesoporous high-entropy sulfide (CoMnNiZnFe) S2 catalyst, a preparation method and application in preparation of formic acid through electrooxidation of PET hydrolysate, oleic acid is used as a stabilizer, nitrate and urea are mixed in an ethanol aqueous solution, the urea is gradually decomposed in the hydrothermal reaction process to form isocyanic acid and ammonia for controlling the pH value of the solution, and the pH value of the solution is controlled; the method comprises the following steps: reacting metal salt with isocyanic acid to form an M (OH) 2CO3 nano-plate, reacting the metal salt with CO2 released by the isocyanic acid to form the M (OH) 2CO3 nano-plate, calcining the M (OH) 2CO3 nano-plate in air to form a mesoporous high-entropy oxide, and vulcanizing the mesoporous high-entropy oxide to obtain the mesoporous high-entropy sulfide. The electro-catalysis result shows that excellent formic acid selectivity and cycling stability are shown, waste utilization of PET and efficient production of formic acid are achieved, and the application and development requirements of related fields are met.

The invention relates to a paraffin modified organic silicon pressure-sensitive adhesive with viscosity switching triggered by temperature, and belongs to the technical field of pressure-sensitive adhesives. The preparation method comprises the following steps: by taking high-temperature wax as a core material and melamine-formaldehyde resin and a KH-550 modified nano boron nitride hybrid shell layer as wall materials, obtaining a phase change microcapsule by adopting an in-situ polymerization method, and then grafting Mal-PEG2-COOH to obtain a modified phase change microcapsule; the preparation method comprises the following steps: forming an intermediate from isocyanate propyl triethoxy silane and furfuryl amine, hydrolyzing to modify an organic silicon pressure-sensitive base adhesive, and preparing the organic silicon pressure-sensitive adhesive from the modified organic silicon pressure-sensitive base adhesive and the modified phase-change microcapsules. The DA reaction is performed at normal temperature to form a covalent cross-linked network, so that the pressure-sensitive adhesive is endowed with high-strength adhesive property; during heating, paraffin melting and DA reverse reaction cooperate to reduce viscosity, and viscosity switching triggered by temperature is achieved; and the modified nano boron nitride can accelerate temperature response and enhance the mechanical property of the microcapsule. The organic silicon pressure-sensitive adhesive prepared by the invention has the effect of temperature-triggered viscosity switching.