356 results about "Phthalic anhydride" patented technology

The invention relates to high-flexibility phenolic-aldehyde-free rosin modified resin, and belongs to the technical field of rosin resin. The raw materials comprise rosin, maleic anhydride, phthalic anhydride, pentaerythritol, glycerol, an acrylate monomer and magnesium oxide. The preparation process comprises four key reactions: (1) rosin and maleic anhydride are subjected to a Diels-Alder reaction to construct a rigid skeleton; (2) introducing phthalic anhydride to form a compact cross-linked network; (3) carrying out composite esterification on pentaerythritol and glycerol; and (4) the interface binding energy is improved by regulating and controlling the in-situ RAFT polymerization of the acrylate monomer. The resin does not contain phenolic aldehyde components, VOCs emission is smaller than 50 g / L, free formaldehyde is not detected, and the resin has high flexibility, heat resistance and excellent chemical resistance.

The invention discloses a thermal interface material based on elastomer glass and a preparation method thereof. The thermal interface material is prepared from the following raw materials: a diglycidyl ether-terminated liquid polythioether prepolymer, methyl tetrahydrophthalic anhydride, ethylene glycol diglycidyl ether, a catalyst and a heat-conducting filler. According to the invention, the highly vertical orientation of the heat-conducting filler is realized through a process of combining hot pressing and stack welding, and the heat-conducting filler has an extremely high heat conductivity coefficient in the vertical direction. The Rc of the thermal interface material is much lower than that of a commercial thermal interface material adopting a traditional silicon matrix, and the thermal interface material has a spontaneous contact behavior on the surface of the substrate.

The invention relates to the technical field of polyurethane compositions, in particular to a chlorotrifluoropropene-based high-temperature-resistant polyurethane composition and a preparation process thereof, and the chlorotrifluoropropene-based high-temperature-resistant polyurethane composition comprises the following raw materials: hydroxylated chlorotrifluoropropene, modified hexamethylene diisocyanate tripolymer, phthalic anhydride polyester polyol, nano silicon carbide whiskers and polyimide microspheres. A fluorine element is introduced into hydroxylated chlorotrifluoropropene, so that the thermal decomposition temperature of the material is remarkably increased, and thermal movement and oxidative degradation of a molecular chain at high temperature are inhibited; meanwhile, a rigid benzene ring structure of bisphenol A dihydroxyethyl ether improves the regularity of a molecular chain and reduces high-temperature softening deformation. The modified hexamethylene diisocyanate tripolymer forms a stable siloxane cross-linked network, so that the thermal stability of the material is further enhanced; in addition, an isocyanate group reacts with hydroxyl to generate a high-density carbamate crosslinking point, so that the regularity of a hard segment is enhanced, and the thermal stability of the material is improved.

The invention belongs to the field of alkyd resin, and particularly relates to alkyd resin with high adhesive force and a preparation method thereof. The high-adhesion alkyd resin is prepared from soya oil acid, a nitrogen-containing heterocyclic compound, phthalic anhydride, pentaerythritol and hydroxyl-terminated polydimethylsiloxane. By introducing a nitrogen-containing heterocyclic compound (such as quinoline and triazole) and hydroxyl-terminated polydimethylsiloxane (PDMS), the molecular structure of the alkyd resin is remarkably optimized, so that the alkyd resin is superior to the traditional alkyd resin in the aspects of heat resistance, corrosion resistance, mechanical strength, adhesive force, construction performance and the like. The coating is suitable for the fields of high-temperature anticorrosive coatings, marine coatings, industrial protective coatings and the like, and shows remarkable technical advantages and wide market prospects.

The invention discloses lighting resin as well as a preparation method and application thereof, and belongs to the technical field of lighting type unsaturated polyester resin. Comprising the following components: ethylene glycol, benzoic acid, phthalic anhydride, maleic anhydride, an antioxidant, a defoaming agent, a surfactant, a stabilizer, styrene, a solvent, a first polymerization inhibitor, a second polymerization inhibitor and a third polymerization inhibitor. The alcohol-acid ratio is (1.03-1.13): 1; the molar ratio of unsaturated acid to saturated acid is (2.5-3.5): 1; the mass ratio of benzoic acid to the surfactant is (26.8-44): 1; the preparation method comprises the following steps: 1) reacting ethylene glycol, maleic anhydride, phthalic anhydride, benzoic acid, an antioxidant and a first polymerization inhibitor; the preparation method comprises the following steps of (1) adding a first polymerization inhibitor, (2) heating and preserving heat after the reaction is completed, and (3) cooling, adding a second polymerization inhibitor, cooling, adding a third polymerization inhibitor, a cross-linking agent, a surfactant and a defoaming agent, and adding a solvent to obtain the daylighting resin.According to the preparation method, the surfactant and benzoic acid have a synergistic effect, so that the compatibility of polyester and the cross-linking agent is improved.

The invention relates to rosin modified resin and a preparation process thereof and low-odor printing ink, the rosin modified resin is prepared from maleic anhydride, sulfonate alkyd resin, rosin and a metal organic framework, and the sulfonate alkyd resin is prepared from neopentyl glycol, dibutyltin dilaurate, m-phthalic acid-5-sodium sulfonate, phthalic anhydride and pentaerythritol. The printing ink has the effect of improving the strength and smell of the printing ink.

The present invention relates to the field of solar-driven interfacial photothermal evaporation technology, and more particularly to a solar-driven interfacial evaporator based on TiN / polyimide aerogel, its preparation method, and application. The TiN / polyimide aerogel comprises a polyimide aerogel matrix with vertical channels connecting upper and lower surfaces, loaded with TiN nanoparticles. The aerogel is prepared by polycondensation, dehydration, and cyclization of the polyimide aerogel 4,4'-diaminodiphenyl ether and 4,4'-oxydiphthalic anhydride. The TiN / polyimide aerogel provided by the present invention, when used as a solar-driven interfacial evaporator, can not only improve the water transfer performance of a three-dimensional photothermal evaporator, but also increase the photothermal evaporation rate during seawater desalination.

The invention discloses a two-component epoxy pouring sealant as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The bi-component epoxy pouring sealant comprises a component A and a component B. The component A comprises the following raw materials: 60-100 parts of modified epoxy resin; 5-25 parts of a reactive diluent; 1 to 10 parts of nano silicon dioxide; the component B comprises the following raw materials in parts by mass: 50-60 parts of an alicyclic amine curing agent; 20-30 parts of a polyether amine curing agent; 10 to 15 parts of methyl tetrahydrophthalic anhydride; 3-5 parts of a silane modifier; 0.1 to 0.5 part of a defoaming agent; the modified epoxy resin is prepared by carrying out esterification reaction on bisphenol A type epoxy resin and long-chain fatty acid for modification and then carrying out graft modification with polypropylene glycol diglycidyl ether. In addition, the invention also provides a preparation method of the two-component epoxy pouring sealant. The epoxy pouring sealant provided by the invention has excellent bonding performance on non-polar plastics such as PP / PE and the like.

The invention relates to the technical field of alkyd resin, in particular to organosilicone modified waterborne alkyd resin and a preparation method thereof.The method comprises the following steps that cottonseed oil, an alcoholysis catalyst and trimethylolpropane are subjected to an alcoholysis reaction under protection of inert gas, and an alcoholysis product is obtained; 2, carrying out esterification polymerization reaction on the alcoholysis product, a water-carrying agent, phthalic anhydride and trimellitic anhydride to obtain basic alkyd resin; the organic silicon modified alkyd resin is obtained from the basic alkyd resin and organic silicon under the action of the modified catalyst; sequentially adding a cosolvent, a neutralizer and water into the organic silicon modified alkyd resin, and stirring and mixing to obtain the organic silicon modified waterborne alkyd resin. According to the invention, through a modification technology, the hydrophobicity of a coating is enhanced while the water dispersibility of the organosilicon modified alkyd resin is ensured, so that the organosilicon modified resin has self-cleaning capability and permeation corrosion resistance, a steel structure material can be effectively protected, and the service life of the steel structure material is prolonged.

The invention discloses unsaturated polyester resin for repairing an ultraviolet curing pipeline, and belongs to the technical field of preparation of unsaturated polyester resin. The unsaturated polyester resin for repairing the ultraviolet curing pipeline is prepared from the following components in parts by weight: 20 to 30 parts of maleic anhydride, 15 to 25 parts of phthalic anhydride, 19.8 to 34.1 parts of ethylene glycol, 24.3 to 41.8 parts of propylene glycol, 4 to 10 parts of a composite ultraviolet curing agent, 1 to 3 parts of a modified temperature-sensitive agent, 2 to 5 parts of carbon nanotubes, 0.1 to 0.5 part of hydroquinone and 0.5 to 1.2 parts of an antioxidant 1010. The unsaturated polyester resin prepared by the method has excellent temperature-responsive phase change, mechanical property, catalytic photocuring property and chemical corrosion resistance.

The invention discloses a preparation method of a self-repairing coating based on a dynamic ester bond, and belongs to the field of self-repairing coating materials, the dynamic ester bond is introduced into epoxy resin, self-repairing is realized through reversible reaction of the dynamic bond, waterborne epoxy resin and a curing agent methylhexahydrophthalic anhydride react, and the self-repairing coating is prepared. Epoxy resin containing dynamic reversible ester bonds can be prepared under the catalytic condition of polyethylene glycol. The prepared dynamic ester bond epoxy resin coating is simple in synthesis process and rapid in reaction; the required raw materials are easy to obtain, the curing time is very short, the self-repairing condition is easy to achieve, and only heating is needed. According to the self-repairing coating material, a common epoxy resin coating has self-repairing performance, the service life of the common coating is prolonged, and resource waste caused by waste, aging and damage of the epoxy resin material is reduced.

The invention discloses waterborne epoxy resin, a coating and a preparation method and application thereof, and relates to the technical field of high polymer materials. The water-borne epoxy resin has a specific structure, the structure contains units of glycidol, bisphenol A and fluorophthalic anhydride, the water-borne epoxy resin does not contain chloride ions and can be used for preparing low-chlorine, low-sulfur and low-lead water-borne epoxy coatings, the corrosion resistance of coatings formed by the water-borne epoxy coatings is improved, the service life of the coatings formed by the water-borne epoxy coatings is prolonged, and the service life of the coatings is prolonged. The obtained coating is improved in acid and alkali resistance, water resistance and salt spray resistance, has good adhesive force, is suitable for preparing the coating for stainless steel, and can effectively prevent free chloride ions from damaging a stainless steel passive film protective layer.

The invention relates to a high-heat-resistance and high-insulation two-component epoxy resin adhesive and application thereof, and belongs to the technical field of epoxy resin. The technical problem to be solved by the invention is to provide the high-heat-resistance and high-insulation two-component epoxy resin adhesive. The adhesive comprises a component A and a component B. The component A comprises bisphenol A epoxy resin, novolac epoxy resin, silicon carbide whiskers, potassium titanate fibers, boron phenolic resin and modified nano boron nitride. The component B is prepared from methylhexahydrophthalic anhydride, methyl tetrahydrophthalic anhydride, 2-phenylimidazole, modified aluminum oxide, polyimide micro powder and modified wollastonite. Through synergism of multiple materials, balance of heat conduction, insulation, mechanical strength and thermal stability of the adhesive is realized. Under high-frequency pulse voltage, the adhesive is long in electrical aging life. A gradient curing process is adopted for curing, complete reaction in each stage is guaranteed, and internal stress is reduced. The process fault tolerance is high, the environment compatibility is high, the cost is low, and the curing time is short.

The invention relates to the technical field of sound insulation materials, in particular to flame-retardant epoxy resin composite diatomite sound insulation cotton and a preparation method thereof. The flame-retardant epoxy resin composite diatomite sound insulation cotton is prepared from epoxy resin, diatomite, a composite flame retardant, a coupling agent, a curing agent, a diluent, a foaming agent and a charring agent. The composite flame retardant at least comprises ammonium polyphosphate and melamine; the coupling agent is a silane coupling agent or a titanate coupling agent; the curing agent is methyl tetrahydrophthalic anhydride; the diluent is n-butyl glycidyl ether; the foaming agent is azodicarbonamide; the charring agent is pentaerythritol. By optimizing the diatomite modification process and combining physical dispersion and chemical modification means, the compatibility of the diatomite and the epoxy resin is greatly improved, the pain point of filler agglomeration in the traditional process is thoroughly solved, the porous sound insulation potential of the diatomite is fully released, and the sound absorption and sound insulation performance of the material is qualitatively improved.

The invention relates to low-viscosity high-strength two-component epoxy winding resin and a preparation method and application thereof, the resin comprises a component A and a component B, and the mass ratio of the component A to the component B is 100: (80-110); the component A consists of the following raw materials in percentage by mass: 70-85% of modified epoxy resin, 14-20% of a functional reactive diluent and 1-10% of an impregnating compound; the modified epoxy resin is formed by compounding bisphenol A epoxy resin and polyether modified epoxy resin, and the functional active diluent is formed by compounding 1, 6-hexanediol diglycidyl ether and phenyl glycidyl ether; the component B is prepared from the following raw materials in percentage by mass: 85-96% of a composite anhydride curing agent, 2.5-10% of a high-efficiency accelerant and 1.5-5% of a defoaming agent; the composite anhydride curing agent is compounded by methyl tetrahydrophthalic anhydride and succinic anhydride, the efficient accelerant is compounded by imidazole and phosphine, and the defoaming agent is an organic silicon defoaming agent.

The invention relates to the technical field of mineral cables, and provides a mineral fireproof power cable which sequentially comprises a cable core, a mineral insulating layer, a copper sheath and an outer sheath layer from inside to outside, and the outer sheath layer is prepared from the following raw materials in parts by weight: 95-105 parts of polyethylene, 4-6 parts of a plasticizer, 30-35 parts of composite titanium dioxide, 1-2 parts of an antioxidant and 5-8 parts of a flame retardant; the composite titanium dioxide is titanium dioxide treated by butanedioic anhydride and phthalic anhydride. According to the technical scheme, the problem of poor tensile strength of the polyethylene outer sheath layer of the mineral fireproof power cable in the prior art is solved.

The utility model discloses a phthalic anhydride preparation device with a preheater, which comprises an o-xylene storage tank, an o-xylene heater, a mixer, an oxidation reactor, a first phthalic anhydride catcher, a second phthalic anhydride catcher, a tail gas tower and a phthalic anhydride rectifying tower which are sequentially connected through a pipeline, a liquid adding pump is arranged between the o-xylene storage tank and the o-xylene heater; the phthalic anhydride preparation device with the preheater further comprises an air compressor and an air heater which are sequentially connected through a pipeline, the air heater is connected with the mixer through a pipeline, and the air preheater is further arranged between the air compressor and the air heater and comprises a body. A heating pipe fitting is arranged in the body, the heating pipe fitting comprises a heating pipe and spiral fins arranged around the heating pipe, by-product low-pressure steam of the oxidation reactor can be reasonably utilized by additionally arranging the air preheater, and the use amount of high-pressure steam is saved.

The utility model discloses a phthalic anhydride rectifying device which comprises a rectifying tower, an outlet pipeline arranged at the top of the rectifying tower, a condensing device connected with the outlet pipeline, an intermediate storage tank connected with the condensing device through a pipeline and a finished product storage tank connected with the intermediate storage tank through a pipeline, the condenser is horizontally arranged, a first sealing head and a second sealing head are arranged at the two ends of the condenser, a shell is arranged in the middle of the condenser, a first gas phase inlet and a first liquid phase outlet are formed in the first sealing head, a second gas phase inlet and a second liquid phase outlet are formed in the second sealing head, and a condensation pipe is arranged in the shell.

The invention discloses ternary copolymerized low-dielectric polyimide based on fluorinated cross-linked side groups as well as a preparation method and application of the ternary copolymerized low-dielectric polyimide. According to the preparation method, two diamine monomers with a fluorine-containing group and a large-volume side chain group, namely fluorine-containing triarylmethane diamine and tetrafluorostyrene side group-containing diamine, are polymerized with 4, 4 '-(hexafluoroisopropenyl) diphthalic anhydride to obtain the ternary copolymerized polyimide (Co-FPAPI-x), and the preparation method is efficient, simple, convenient and low in cost. The tetrafluorostyrene group in the ternary copolymerized polyimide structure can form a hydrophobic cross-linked network through a thermal cross-linking reaction. Besides, by changing the proportion and thermal crosslinking degree of the two diamine monomers, the accumulation state, polarization behavior and the like of a molecular chain can be adjusted, so that the performance of the material is improved.

The invention discloses conductive ink for ink-jet printing and a preparation method thereof. Comprising the following steps: step 1, dissolving bisphenol F type epoxy resin in dimethyl nylon acid, stirring for 10-15 minutes until the bisphenol F type epoxy resin is completely dissolved, then adding modified composite filler, methyl tetrahydrophthalic anhydride, a dispersing agent and a flatting agent, and continuously stirring for 20-30 minutes to obtain a mixed solution; 2, the mixed solution is subjected to ultrasonic treatment for 30-40 min till no macroscopic particles exist, and the conductive ink is obtained. The conductive ink has the beneficial effects that the epoxy resin is mixed with the modified composite filler, the methyl tetrahydrophthalic anhydride and the like, and ultrasonic treatment is performed to prepare the conductive ink; according to the conductive ink, the MXene and the carbon nanotubes are adopted to construct a three-dimensional conductive network, and the dispersity and the interface bonding force of the filler are improved through surface modification, so that the conductivity and the mechanical strength of the ink are effectively improved.

The invention discloses a method for producing N-(2-hydroxyethyl)-phthalimide by the aminolysis of phthalic anhydride slag by ethanolamine, and belongs to the technical field of phthalic anhydride slag recycling. The method can convert phthalic anhydride and other components in phthalic anhydride slag into organic chemical and pharmaceutical intermediate N-(2-hydroxyethyl)-phthalimide. The present invention utilizes the aminolysis reaction of ethanolamine and phthalic anhydride, and the phthalic anhydride waste residue aminolysis product can be separated and purified by recrystallization through water while hot, and the product N-(2-hydroxyethyl)-phthalimide purity can reach more than 95%, and the conversion rate of phthalic anhydride in phthalic anhydride slag can reach more than 95%. The process conditions of the present invention are mild, the separation is simple, the product added value is high, the large-scale resource recycling of industrial phthalic anhydride slag can be realized, and a new synthetic route is opened up for the production of N-(2-hydroxyethyl)-phthalimide.

The invention discloses a polylactic acid composite material for a packaging bottle and a preparation method of the polylactic acid composite material. The polylactic acid composite material for the packaging bottle is prepared from the following components in parts by mass: 50 to 70 parts of polylactic acid, 10 to 30 parts of poly (epsilon-caprolactone), 10 to 30 parts of poly (propylene carbonate), 30 to 50 parts of functional master batch and 0.1 to 0.5 part of antioxidant, the functional master batch is prepared from a polylactic acid-modified nano silicon dioxide-poly (propylene carbonate) graft and a polylactic acid-modified nano silicon dioxide-poly (epsilon-caprolactone) graft; the modified nano silicon dioxide is 4-phenylethynyl phthalic anhydride modified nano silicon dioxide. The modified nano silicon dioxide is obtained by adopting an ultrasonic blending method, and different macromolecular substances are bonded through the modified nano silicon dioxide by utilizing an electron irradiation method to obtain a modified graft, so that the surface energy of particles can be reduced, the agglomeration among the particles can be reduced, and the dispersing performance of the nano silicon dioxide can be improved.

The invention discloses a polyimide-aluminum oxide composite film material and a preparation method thereof, the composite film material is composed of a polyimide layer and an aluminum oxide layer deposited and combined on the upper surface of the polyimide layer, and the thickness of the polyimide layer and the thickness of the aluminum oxide layer are both nanoscale; the composite film material is prepared by using atomic layer deposition equipment, and the preparation method comprises the following steps: firstly, depositing a nanoscale polyimide layer on a monocrystalline silicon piece carrier according to a set program by taking pyromellitic dianhydride and hexamethylenediamine as precursor raw materials; and depositing and combining a nanoscale aluminum oxide layer on the upper surface of the polyimide layer according to a set program by taking trimethylaluminum and distilled water as precursor raw materials. The prepared composite film material is different from a current composite film material prepared by blending polyimide and aluminum oxide and then carrying out film casting, the composite film material has a nano-scale polyimide layer with uniform thickness and a nano-scale aluminum oxide layer deposited and combined on the upper surface of the polyimide layer, and the composite film material has a good radiation refrigeration effect.

The present invention relates to the field of 1,4-dihydroxyanthraquinone dilution and hydrolysis mother liquor treatment, specifically a kind of cleaning treatment method of 1,4-dihydroxyanthraquinone dilution and hydrolysis mother liquor. Its steps mainly include: decolorization, cooling, neutralization and dissolution in ammonia water, solid-liquid separation, acidification, crystallization, drying pyrolysis, evaporation concentration, decolorization, quicklime reaction. The present invention can reclaim the excess phthalic anhydride added during the production of 1,4-dihydroxyanthraquinone in the dilution and hydrolysis mother liquor, can save resources, while reducing the production cost of the enterprise, meet the basic requirements of clean production, can extract boric acid by evaporation concentration hydroxyl mother liquor, centrifugation, drying, and then reclaim sulfuric acid by adding calcium oxide, truly achieve the unity of wastewater treatment and resource recovery, and realize clean production.

The invention discloses weather-resistant and medium-resistant alkyd resin varnish and a preparation method thereof. The varnish is prepared from the following raw materials: modified alkyd resin, a composite drier, zirconium iso-octoate with the purity of 12%, an anti-skinning agent, 200 # solvent oil and xylene. The modified alkyd resin is prepared from the following raw materials: soya oil acid, pentaerythritol, benzoic acid, pyrrolidine-2-one-1-acetic acid, dimethylbenzene and a 200 # solvent. According to the invention, pyrrolidine-2-ketone-1-acetic acid is used as a binary acid component to partially or completely replace traditional phthalic anhydride, so that the reaction efficiency of alkyd resin synthesis can be improved, and the problems of yellowing, pulverization and poor water resistance of traditional alkyd resin can be solved; according to the varnish prepared by the invention, on the basis of maintaining the inherent gloss, flexibility and constructability of alkyd resin, the key properties such as weather resistance, water resistance and acid resistance are improved; the whole preparation process of the varnish continues to use mature alkyd resin production equipment and flow, and has good economical efficiency and industrial popularization prospects.

The invention discloses high-strength p-benzene pultruded resin as well as a preparation method and application thereof, and belongs to the technical field of unsaturated polyester resin. The p-benzene pultrusion resin is prepared from the following raw materials in parts by weight: 330 to 420 parts of diethylene glycol, 150 to 250 parts of propylene glycol, 40 to 120 parts of ethylene glycol, 390 to 440 parts of maleic anhydride, 350 to 450 parts of terephthalic acid, 50 to 150 parts of phthalic anhydride, 0.3 to 1.0 part of an antioxidant, 0.3 to 0.8 part of a catalyst, 0.1 to 0.5 part of a first polymerization inhibitor, 0.1 to 0.5 part of a second polymerization inhibitor, 0.01 to 0.04 part of a stabilizer, 0.3 to 0.8 part of a catalyst and 600 to 700 parts of styrene. The high-strength p-benzene pultruded resin has the advantages of excellent mechanical properties, good toughness, good corrosion resistance, low price and the like.

The invention discloses phosphate-based flame-retardant unsaturated polyester resin and a synthesis method thereof, and belongs to the technical field of chemical raw material production. The preparation method comprises the following steps: mixing a hydroxyl monomer, a phosphoryl dichloride monomer, an organic solvent and triethylamine, and reacting to obtain a phosphate flame-retardant unsaturated polyester resin monomer; mixing and reacting the phosphate flame-retardant unsaturated polyester resin monomer, phthalic anhydride, maleic anhydride and neopentyl glycol to obtain polyester resin; the polyester resin and the polyurethane-coated aluminum hydroxide emulsion are mixed and react to obtain the phosphate-based flame-retardant unsaturated polyester resin. According to the preparation method, a phosphate-based flame-retardant unsaturated polyester resin monomer is obtained through chemical synthesis, polyester resin is obtained through further polymerization, the polyester resin reacts with polyurethane-coated aluminum hydroxide emulsion, and the phosphate-based flame-retardant unsaturated polyester resin which does not contain halogen groups and has good flame retardant property and mechanical property is obtained.

The invention relates to the field of ceramic packaging materials, in particular to a packaging material for a high-voltage-resistant ceramic side wall and a preparation method of the packaging material. The packaging material is prepared from an epoxy-silica hybrid prepolymer, an aluminum oxide and silicon dioxide core-shell composite filler, methylhexahydrophthalic anhydride and 2-ethyl-4-methylimidazole, wherein the hybrid prepolymer is prepared by carrying out hydrolytic condensation on bisphenol A diglycidyl ether, hydroxyl-terminated PDMS (Polydimethylsiloxane) and 3-glycidoxypropyltrimethoxysilane; low viscosity and low volatile matter are realized; the core-shell filler takes aluminum oxide as a core and silicon dioxide as a shell, and a shell layer is grafted with epoxy silane so as to be chemically bonded with resin. And after curing, the power frequency short-time electrical strength of the packaging layer is greater than or equal to 20 kV / mm, the partial discharge initial voltage is greater than or equal to 3 kV, the volatile matter is less than or equal to 1.0 wt%, and the water content is less than or equal to 0.2 wt%.

The invention discloses a method for improving photoelectric performance and stability of a perovskite solar cell, and belongs to the technical field of preparation of perovskite solar cells. According to the technical scheme, 4-fluorophthalic anhydride is introduced into a perovskite light absorption layer of the perovskite solar cell. 4-fluorophthalic anhydride is used as a passivating agent, so that the adverse effect of surface defects of the perovskite thin film can be effectively inhibited, the performance of the perovskite solar cell is improved, and the service life of the cell in a humid environment is prolonged. The method is simple, effective and wide in application prospect.

The application provides a preparation method of an indobufen key intermediate. The method uses 2-(4-nitrophenyl) butyric acid and phthalic anhydride as raw materials, and obtains the target compound (I) through a one-pot method. The method has the advantages of simple operation, mild conditions, high reaction yield, reduced cost through mother liquor recycling and reuse, significantly reduced "three wastes" and environmental protection, and is suitable for large-scale industrial production.