140 results about "Toluene diisocyanate" patented technology

Disclosed in the present invention are a reinforced polyurethane rigid foam material and a preparation method therefor, belonging to the technical field of high polymer materials. The material comprises: 5-10 parts of glass fiber yarn, 40-60 parts of an aromatic polyether polyol, 30-50 parts of an aromatic polyester polyol, 30-50 parts of toluene diisocyanate, 40-60 parts of polymethylene polyphenyl polyisocyanate, 5-10 parts of a flame retardant, 5-15 parts of a foaming agent, 1-5 parts of a catalyst and 1-5 parts of a surfactant. The present invention can achieve continuous production of the reinforced polyurethane rigid foam material and can improve the tensile property of the material by 20% or above and increase the utilization rate of glass fibers by 5% or above. The reinforced polyurethane rigid foam material can be widely applied to the field of liquefied gas storage and transportation.

The present invention relates to the field of polyurethane materials and particularly to a temperature-induced color-changing vehicle film and a preparation method therefor. The method of the present invention comprises: firstly, using polyurethane to wrap vanadium dioxide powder to obtain color-changing microcapsules; then using 1,1,1,3,5,5,5-heptamethyltrisiloxane and 3-allyloxy-1,2-propanediol as raw materials to synthesize an organosilicon-modified diol, and enabling trimellitic anhydride to react with toluene diisocyanate to synthesize a dicarboximide compound; enabling the organosilicon-modified diol and the dicarboximide compound to undergo an esterification reaction and a polymerization reaction to obtain an organosilicon-modified imide polyester diol; then mixing the organosilicon-modified imide polyester diol with polytetrahydrofuran ether glycol 2000, and then enabling the mixture to react with toluene diisocyanate to obtain a polyurethane elastomer; and mixing the polyurethane elastomer, the color-changing microcapsules, a silane coupling agent, a plasticizer, an antioxidant, and an ultraviolet light absorber, followed by melt extrusion and blow molding into a film, so as to obtain the temperature-induced color-changing vehicle film.

The invention relates to high-strength all-water-blown polyurethane foam and a preparation method thereof. The high-strength all-water-blown polyurethane foam comprises the following components in parts by weight: a polyol composite material: 100 parts of polyether polyol, 2-8 parts of water, 0.5-3 parts of an amine catalyst, 0.2-2 parts of a gel catalyst, 1-5 parts of an organosilicon surfactant, 3-8 parts of a composite filler and 0-10 parts of an auxiliary agent; wherein the composite filler is formed by coating the surfaces of glass beads with porous nano silicon dioxide; the isocyanate material is an MDI (Diphenyl Diisocyanate) or TDI (Toluene Diisocyanate) prepolymer, and the isocyanate index of the MDI or TDI prepolymer is 100 to 120 percent. The surface of the glass bead is coated with a nano silicon dioxide porous shell layer in situ to form a unique'hard core-soft shell 'gradient interface structure, so that the interface bonding force between the filler and a polyurethane matrix is improved, stress transfer is optimized, and the foam material is endowed with excellent comprehensive mechanical properties, especially compressive strength and structural stability.

The invention discloses environmentally degradable plastic as well as a preparation method and application thereof, and belongs to the technical field of degradable plastic. The degradable modified plastic is prepared from the following raw materials: polylactic acid, poly (butylene terephthalate)-adipate, modified thermoplastic starch, modified cellulose, poly (butylene succinate), epoxidized soybean oil, polyvinyl alcohol, glycerol monolaurate and ethylenediaminetetraacetic acid. Wherein the modified thermoplastic starch is obtained by thermoplastic modification of starch through a plasticizer and modification of castor oil and toluene diisocynate; the modified cellulose is obtained by modifying cellulose acetate with chitosan. By regulating and controlling the types and proportions of the raw materials for preparing the plastic, the plastic with excellent degradation performance and mechanical performance can be obtained, the shopping bag is prepared from the plastic, the loading capacity can be remarkably improved, the plastic is easily degraded by microorganisms in the environment after being discarded, and environmental pollution is avoided.

The invention discloses a high-performance anti-corrosion coating based on a layered nano material and a preparation method of the high-performance anti-corrosion coating. The anticorrosive paint is prepared from raw materials including a component A and a component B. The component A comprises epoxy resin, modified MXene nanosheets, modified graphene oxide, nano clay, zinc powder, a corrosion inhibitor, a defoaming agent, a flatting agent and ethylene glycol butyl ether, the modified MXene nanosheets are obtained by conducting surface treatment on the MXene nanosheets through a silane coupling agent, and the modified graphene oxide is obtained by conducting surface treatment on the modified MXene nanosheets through a silane coupling agent. The modified graphene oxide is obtained by modifying graphene with toluene diisocynate and dibutyltin dilaurate; and the component B is a polyamide resin curing agent. According to the anticorrosive paint disclosed by the invention, through interlayer intercalation and surface functional modification of MXene and graphene oxide, a compact physical barrier is formed, the interface bonding force is enhanced, and the permeability resistance is remarkably improved; the corrosion inhibitor is encapsulated in the layered structure, and when the coating is damaged, the corrosion inhibitor can be actively released to repair local microcracks.

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 provides a heat-conducting water-blocking sealant, a preparation method thereof and a photovoltaic module. The heat-conducting and water-blocking sealant is prepared from the following raw materials in parts by mass: 50 to 100 parts of methyl vinyl siloxane, 50 to 100 parts of lignin, 10 to 50 parts of diamond particles and / or diamond alloy particles, 0.5 to 10 parts of a first cross-linking agent, 0.5 to 10 parts of a second cross-linking agent, 0.5 to 5 parts of a coupling agent and 0.05 to 1 part of a catalyst, wherein the first cross-linking agent is prepared from one or more of dicumyl peroxide, benzoyl peroxide, toluene diisocynate and hexamethylene diisocyanate; the second cross-linking agent comprises polymethylhydrosiloxane. The heat-conducting and water-blocking sealant disclosed by the invention has relatively good heat-conducting property, water-blocking property and electrical insulation property.

The invention belongs to the technical field of metal material plating, and particularly relates to a connector surface composite coating and a preparation process thereof, and the preparation process comprises the following steps: adding modified carbon black and sodium molybdate into deionized water, stirring to obtain a corrosion inhibition material, and mixing with modified zinc oxide to obtain a mixed filler; the preparation method comprises the following steps: adding dibutyltin dilaurate and toluene diisocynate into polypropylene glycol to obtain a core material; adding hexadecyl trimethyl ammonium bromide and the mixed filler into a 93-96 wt% ethanol solution, adding the core material for emulsification, adding an isophorone diisocyanate solution, and stirring to obtain a microcapsule; nickel sulfate hexahydrate, nickel chloride hexahydrate, sodium citrate, boric acid, a surface dispersant, a sodium hydroxide solution and microcapsules are added into deionized water to be mixed, and an electroplating solution is obtained; and putting the connector into the electroplating solution for electroplating to obtain the composite coating. The expansion of pitting corrosion can be inhibited, and the long-term use reliability and stability of the connector in a marine environment are improved.

The application relates to the technical field of solar energy, in particular to a self-cleaning solar photovoltaic panel and a preparation process thereof. The application adds anhydrous ethanol, ammonia water, deionized water, methyl triethoxysilane, tetraethyl orthosilicate and octadecyl trimethoxysilane to prepare silica sol. Then, tetra(2-hydroxyethoxy)silane, polypropylene glycol, toluene diisocyanate, betulin, 3,4-diamino furazan, silica sol and a catalyst stannous octoate are added to prepare a polymer. Glass, ethylene-vinyl acetate copolymer, a cell piece and ethylene-vinyl acetate copolymer are sequentially laid in layers; the laminated assembly is assembled with a frame to obtain a solar photovoltaic panel. Finally, a coating is prepared by taking the polymer as a raw material, and the coating is coated on the solar photovoltaic panel to obtain a finished product. The finished product has good hydrophobicity and antibacterial property, and therefore has a wide application prospect.

The present invention provides a two-component curing adhesive that suppresses appearance defects even when used as a solvent-free adhesive in the manufacture of barrier substrates. A two-component curing adhesive comprising a polyisocyanate composition (X) containing a polyisocyanate compound (A) and an isocyanate-reactive composition (Y) containing a polyol compound (B), wherein the polyisocyanate compound (A) comprises a polyurethane polyisocyanate (A1), which is a reaction product of toluene diisocyanate and a polyol, and a hexamethylene diisocyanate derivative (A2), and the content of diisocyanate monomer in the polyisocyanate composition (X) is 1.0% by mass or less.

The invention discloses a preparation method of a novel environment-friendly chlorine-resistant color fixing agent, which comprises the following steps: 1) preparing an intermediate: adding polyethylene glycol into a reaction bottle, dehydrating for 1 hour at 120 DEG C under the relative vacuum degree of-0.1 MP, cooling to below 60 DEG C, adding TD I and a solvent, carrying out heat preservation reaction for 1 hour at 60-65 DEG C, and cooling to obtain a polyurethane prepolymer; wherein TDI (toluene diisocyanate) is a mixture of 80% of toluene-2, 4-diisocyanate and 20% of toluene-2, 6-diisocyanate; (2) slowly dropwise adding the polyurethane prepolymer in the step (1) into polyethyleneimine, controlling the temperature to be lower than 40 DEG C during the period, then adding an end-capping reagent, carrying out heat preservation reaction for 1 hour, and adding water to prepare an intermediate product; 2) preparing an environment-friendly chlorine-resistant color fixing agent: adding the intermediate in the step 1) into a reaction bottle, stirring, slowly dropwise adding a cationic etherifying agent, and controlling the temperature to be 20-40 DEG C; and after dripping, carrying out heat preservation reaction for 3-5 hours, controlling the temperature at 60-80 DEG C, finally adjusting the pH value to 5-7 by using glacial acetic acid, and cooling to obtain the environment-friendly chlorine-resistant color fixing agent. The color fixing agent has good chlorine-resistant color fastness and color fixing effect.

The application discloses a toluene diisocyanate production system and a toluene diisocyanate production method, which comprise a rectifying tower, a partition wall tower and a pipeline system for connecting the rectifying tower and the partition wall tower; the top of the rectifying tower is connected with the middle part of the partition wall tower, and the kettle part of the rectifying tower is connected with the middle part of the partition wall tower; the partition wall tower comprises a rectifying section arranged near the top of the partition wall tower and used for removing light component impurities, an isomer regulating section arranged in the middle part of the partition wall tower and used for regulating an isomer ratio and a stripping section arranged near the kettle part of the partition wall tower and used for concentrating heavy component impurities. The toluene diisocyanate production system integrates efficient impurity removal, accurate isomer ratio regulation and energy consumption optimization, can meet the strict requirements of high-end polyurethane products on the purity and isomer ratio of TDI, realizes separation and purification of refined TDI products and outputs TDI products with controllable isomer ratios.

The present application relates to the technical field of materials, in particular to a multi-stage solidification shape memory polymer for 4D printing and a preparation method thereof. In view of the problem that it is difficult to build gradient mechanical functions by precisely regulating the structure modulus in a single structure of 4D printing, the present application obtains a single-component multi-stage solidification shape memory polymer by regulating the ratio of toluene-2, 4-diisocyanate-hydroxypropyl acrylate, shape memory polymer, polyethylene glycol 400 and 1, 3, 5-tris (6-isocyanate hexyl) -1, 3, 5-triazine-2, 4, 6-trione under the test feedback of the printing structure modulus, and solves the problem that it is difficult to build gradient mechanical properties in a single structure of 4D printing.

This application relates to a highly water-mark-resistant cathodic electrophoretic emulsion and its preparation method, belonging to the field of electrophoretic coating technology. The preparation method of the highly water-mark-resistant cathodic electrophoretic emulsion includes the following steps: S1. Blocking some isocyanate groups of toluene diisocyanate with a mixture of n-butanol and PEG400, and then reacting and bonding the unblocked isocyanate groups with oleamide resin and polyamine to obtain a polyamine-modified isocyanate curing agent; S2. Performing a ring-opening amination reaction between epoxy resin and a first amine compound, and then adding a second amine compound to continue the reaction to obtain an amine-modified epoxy resin; S3. Grafting the polyamine-modified isocyanate curing agent onto the amine-modified epoxy resin to obtain a cationic epoxy resin; S4. Neutralizing the cationic epoxy resin with an organic acid, adding deionized water for emulsification and dispersion to obtain the highly water-mark-resistant cathodic electrophoretic emulsion. After electrophoretic film formation, the emulsion exhibits good hydrophilicity on the wet film surface, thereby significantly reducing the formation of watermarks during rapid baking.

The invention discloses a composite propellant containing a high-nitrogen ferrocene derivative and a preparation method of the composite propellant. The composite propellant is prepared from the following components: 14.05% of hydroxyl-terminated polybutadiene (HTPB), 7.03% of diisooctyl sebacate (DOS), 0.92% of 2, 4-toluene diisocyanate (TDI), 1% of the high-nitrogen ferrocene derivative, 59% of ammonium perchlorate (AP) and 18.00% of aluminum powder (Al). N, N-dimethylaminomethylferrocene in the three high-nitrogen ferrocene derivatives has the effects of improving the burning rate of the composite propellant and reducing the pressure index as the ferrocene derivative, nitrate, picric acid, 3-nitro-1, 2, 4-triazole-5-ketone and the like are rich in C, H, O and N elements, and are similar to oxidizing agents such as typical components ammonium nitrate, HMD and the like in the composite propellant; the fuel can be decomposed to provide energy for propellant combustion; the propellant has a low combustion rate pressure index in a pressure range of 1-10 MPa, and has more excellent combustion stability.

The invention relates to the technical field of medical dressings, in particular to a polyurethane foam dressing and a preparation method thereof. Polyethylene glycol, polyhydroxy chitosan, polyhydroxy pyrogallol, antibacterial silicon dioxide, a foaming agent, 2, 6-toluene diisocyanate and other raw materials are added, and the polyurethane foam dressing is obtained through heat preservation and curing. The polyurethane foam dressing prepared by the invention has good antibacterial and anti-inflammatory effects, so that the polyurethane foam dressing has a wide application prospect in the technical field of medical dressings.

This application relates to the field of polyurethane adhesive technology, and discloses an ultra-low temperature high-adhesion-strength single-component polyurethane composition and its preparation method. By mass percentage, it comprises the following components: 50%-60% first isocyanate, 10%-20% prepolymer, 10%-20% inorganic filler, 0.5%-1% catalyst, 1%-2% defoamer, 5%-10% solvent oil, and 0.11%-0.2% pigment. The first isocyanate is a mixture of toluene diisocyanate and isophorone diisocyanate, with a mass ratio of toluene diisocyanate to isophorone diisocyanate of 1:0.5-1.5. The ultra-low temperature high-adhesion-strength single-component polyurethane composition of this application exhibits excellent adhesion strength at room temperature and low temperatures, and superior adhesion performance at ultra-low temperature environments (-150℃), meeting industry standards.

The invention belongs to the technical field of sponges, and particularly relates to an antiviral sponge which comprises the following components in parts by weight: 100 parts of polyether polyol and polymer polyol, 30 to 43 parts of toluene diisocynate; 0.6 to 1.0 part of soft foam silicone oil; 0.3 to 0.6 part of an amine catalyst; 0.1 to 0.3 part of a tin catalyst; 2 to 3.3 parts of water; 2.5 to 3.5 parts of an antiviral agent; the antitoxic agent is a mixture of dimethyl tetradecyl [3-(trimethoxysilyl) propyl] ammonium chloride and triethylene glycol monomethyl ether. Compared with the prior art, the sponge material with excellent performance is designed, the polyether polyol, the polymer polyol and the toluene diisocynate are used as main forming components of the sponge material, and the used antiviral component belongs to organosilicon quaternary ammonium salt, so that the antiviral effect can be achieved; the prepared sponge material is comfortable and soft, has good elasticity, also has a strong antiviral effect, has no stimulation to human skin and no carcinogenic risk, and is suitable for medical supplies, hygienic materials and other scenes with high safety requirements.

This invention discloses a method for preparing a graphene-functionalized bio-diatomaceous earth memory foam sponge, relating to the field of sponge manufacturing. The method includes: adding 90% diatomaceous earth by weight and 10% by weight of a liquid containing 5% graphene by weight to a ball mill mixer, followed by stirring for 2-3 hours; ball milling the diatomaceous earth and graphene, then calcining them in a rotary kiln; further ball milling the calcined diatomaceous earth-graphene mixture in a ball mill mixer; adding the diatomaceous earth-graphene mixture powder, polyether polyol, and grafted polyether to a mixing tank, and stirring for 30 minutes using a high-speed mixer; adding catalysts A-1 and A-33 and silicone oil, and continuing stirring for 10 minutes; adding butyltin octoate and toluene diisocyanate, stirring at high speed for 5-7 seconds, and then quickly pouring into a foaming box for free foaming to prepare the graphene bio-sponge. This method improves the sponge's naturalness, microporosity, and ability to adsorb and decompose bacteria and harmful gases entering the sponge body.

The present invention relates generally to a curable polyurethane prepolymer composition comprising polyurethane prepolymer obtained by the reaction of toluene diisocyanate (TDI) and at least one polyol and an ortho alkyl disubstituted dianiline, preferably 4,4′-methylene-bis-(3-chloro-2,6-diethylaniline) (MCDEA), wherein 50 to 100 wt % of the at least one polyol is at least one polycarbonate polyol.

This application relates to the field of waterborne cathodic electrophoretic coating technology, specifically disclosing a bisphenol A epoxy-polyetheramine composite matte electrophoretic emulsion and its preparation method. The bisphenol A epoxy-polyetheramine composite matte electrophoretic emulsion comprises the following raw materials in parts by weight: 30-40 parts E-51 epoxy resin, 8-10 parts bisphenol A, 9-11 parts bisphenol A polyoxyethylene ether, 0.08-0.12 parts benzylamine, 2.5-3.5 parts methylethanolamine, 0.8-1.2 parts diethylene glycolamine, and 2.5-3.5 parts ketimine. This application uses E-51 epoxy resin, bisphenol A, and bisphenol A polyoxyethylene ether as the matrix skeleton, and obtains an epoxy equivalent prepolymer after chain extension catalyzed by benzylamine. At the same time, toluene diisocyanate is reacted with diethylene glycol butyl ether, diethylene glycol ethyl ether, and trimethylolpropane polyoxyethylene ether to prepare a blocked crosslinking agent, thereby achieving a uniform internal matting effect without the addition of external matting powder.

The invention relates to a casting type polyurethane elastomer vibration and noise reduction material for a railway elastic sleeper. Belongs to the technical field of polymer materials. The preparation raw materials are as follows: polyether polyol and diphenylmethane diisocyanate (MDI) or toluene diisocynate (TDI) are used as main reaction raw materials; micromolecular dihydric alcohol or diamine is used as a chain extender; a hindered phenol antioxidant or a phosphite ester antioxidant; a benzotriazole ultraviolet light absorber or a benzophenone ultraviolet light absorber; an organic silicon auxiliary agent; and a nano-scale inorganic filler. The material disclosed by the invention has excellent vibration and noise reduction performance, can meet the requirements that the rigidity range is 100-400KN / mm and the tensile strength is greater than 12MPa, and also has good anti-aging performance and anti-fatigue performance; the stability and the uniformity of the product quality are ensured; and rapid curing can be achieved, and the requirement for high efficiency of site construction is met.

The present invention relates to a thermally debondable one-component polyurea adhesive composition comprising a) dimeric toluene 2,4-diisocyanate; b) a first amine; c) a second amine; d) a curing agent; and e) thermally expandable thermoplastic microspheres.

The invention discloses a photoresponse type UV curing polyurethane resin composition and a photoresponse type polyurethane coating, the composition comprises the following components by mass: 20-40 parts of isocyanate, the isocyanate comprises at least one of isophorone diisocyanate IPDI and toluene diisocyanate TDI, the photoresponse type UV curing polyurethane resin composition comprises a photoresponse type UV curing agent, and the photoresponse type polyurethane coating comprises a photoresponse type UV curing agent, a photoresponse type UV curing agent, a photoresponse type UV curing agent and a photoresponse type UV curing agent. The polyhydric alcohol comprises diol and beta-thymidine, and the mole number of hydroxyl groups of the beta-thymidine accounts for 1%-20% of the total mole number of hydroxyl groups of the polyhydric alcohol; 15 to 30 parts of an end-capping reagent; and 1-5 parts of a photoinitiator. The invention aims to prepare the polyurethane resin which can be subjected to performance adjustment after being cured.

The application belongs to the technical field of adhesives, and relates to a solvent type single-component polyurethane resin and a preparation method thereof, the solvent type single-component polyurethane resin comprising the following components in parts by weight: isocyanate 15-25 parts; macromolecular polyol 25-35 parts; addition modifier 20-30 parts; small molecule chain extender 5-10 parts; catalyst 0.05-0.3 parts; and solvent 55-65 parts. The application introduces an addition modifier, the addition modifier being formed by reacting 2,4-toluene diisocyanate and trimethylolpropane under specific conditions, and the addition modifier being helpful to improving the water resistance, alcohol resistance and easy coloring performance of the product, and interacting with other components to make the solvent type single-component polyurethane resin have excellent water resistance, alcohol resistance and coloring stability.

The application discloses a one-step forming polyurethane synthetic leather and a polyurethane surface layer resin thereof, and belongs to the field of polyurethane synthetic leather. The polyurethane surface layer resin comprises the following raw materials: polyester polyol, polyether polyol PPG, polyether polyol PTMG, ethylene glycol, 1,4-butanediol, trimethylolpropane, toluene diisocyanate, diphenyl methane diisocyanate, modified glue particle, solvent and additive. The application limits the composition of the raw materials of the polyurethane synthetic leather and adopts a specific forming process, so that the prepared polyurethane synthetic leather is smooth in surface and free of defects such as fish eyes and pinholes, and has excellent softness and wear resistance. In the application, the raw material composition of the solid glue particle is limited, the polyurethane surface layer resin is modified, the prepared polyurethane synthetic leather does not need to be combined with other coating layers, and excellent softness and wear resistance can be achieved.

The application relates to the paint technology field, and provides a polyurethane white primer, a preparation method and application thereof. The polyurethane white primer comprises an A component and a B component; wherein the A component comprises soybean oil modified alkyd resin, castor oil modified alkyd resin, titanium white, a filler, an auxiliary agent and an A solvent; the B component comprises a B solvent, a dehydrating agent, an aliphatic isocyanate adduct curing agent and a toluene diisocyanate trimer curing agent. The polyurethane white primer provided by the application is compounded by taking the soybean oil modified alkyd resin and the castor oil modified alkyd resin as main film-forming substances, and is matched with the titanium white, the filler and the auxiliary agent, so that the hiding power, the fullness, the hardness and the flexibility of a coating film are further improved, the coating film has excellent coating effect, and the problems of cracking and falling off are not prone to occurring.

The invention discloses a low-voltage stretchable field effect transistor, an array and a preparation method and application of the low-voltage stretchable field effect transistor, a dielectric layer of the low-voltage stretchable field effect transistor is formed by introducing ionic liquid into a polymer elastomer layer, and the polymer elastomer is a cross-linked product PUU of polypropylene glycol toluene diisocyanate PPG-TDI and 4-aminophenyl disulfide APDS. The mass ratio of PPG-TDI to APDS is 100: (8-15), the ionic liquid is [EMIM] < + > [TFSI] <->, [BMIM] < + > [BF4] <-> or [BMIM] < + > [PF6] <->, and the mass fraction of the ionic liquid in the dielectric layer is 0.01 wt%-10 wt%. A high-capacitance stretchable ILs-PUU dielectric layer is prepared through a strategy of introducing trace ionic liquid into a high-dielectric-constant PUU matrix, and stable operation of the transistor under an ultra-low working voltage of-1 V is realized through the dielectric layer capacitor with an ultra-high unit area.

The application discloses a boiler ash and coking removing agent, a preparation method and application thereof, and belongs to the technical field of coking removing agents. The application is used for solving the technical problems of slow coking removing effect of solid coking removing agents and poor coking removing effect of liquid coking removing agents in the prior art. The boiler ash and coking removing agent comprises aluminum nitrate, potassium nitrate, magnesium nitrate, composite catalyst microspheres, mixed organic acid and water. A multi-amino polyphenyl polycondensate solution and toluene diisocyanate are reacted to obtain a supramolecular polymer solution; sodium hydroxide, dodecyl dimethyl betaine, paraffin wax, copper oxide and iron oxide are uniformly mixed to obtain a mixture; and the composite catalyst microspheres are prepared by coating the mixture with the supramolecular polymer solution; and the composite catalyst microspheres can realize fixed-point blasting under high-temperature conditions. The prepared boiler ash and coking removing agent is sprayed into a boiler in a atomizing mode for coking removing, and has the advantages of rapid coking removing reaction and good coking removing effect.

The invention discloses a degradable high-elasticity TPU composite material and a preparation method thereof, and relates to the technical field of degradable polymer composite materials. The degradable high-elasticity TPU composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of poly (butylene adipate) glycol, 12 to 18 parts of 2, 4-toluene diisocyanate, 3 to 8 parts of 1, 4-butanediol, 2 to 6 parts of modified nano cellulose, 5 to 12 parts of modified polylactic acid, 8 to 15 parts of polycaprolactone, 0.2 to 0.5 part of antioxidant 1010 and 1 to 4 parts of epoxidized soybean oil. The degradable high-elasticity TPU composite material is scientific in raw material ratio, and the compatibility and mechanical properties of the material are improved through the synergistic effect of the modified nanocellulose and the polylactic acid; the preparation process is controllable, and the material is endowed with high elasticity and excellent degradability through multi-step modification; the material has the characteristics of high tensile strength, high elongation at break, good thermal stability and the like, and is environment-friendly and wide in application range.