442 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.

The invention belongs to the technical field of transparent self-repairing conductive elastomer materials, and discloses a high-performance transparent self-repairing conductive elastomer and a preparation method thereof. The method comprises the following steps: 1) reacting polyester diol with diisocyanate under the action of a catalyst to obtain an isocyanato-terminated polyurethane prepolymer; 2) mixing benzene ring-containing dihydrazide with the polyurethane prepolymer, carrying out chain extension reaction, adding bis (trifluoromethanesulfonyl) lithium imide, and carrying out curing molding to obtain a polyurethane-urea conductive elastomer; the dihydrazide is one or more of isophthalic acid dihydrazide or terephthalic acid dihydrazide. The method disclosed by the invention is simple, and the obtained elastomer material has high transparency, high mechanical property and better self-repairing performance; meanwhile, the material has good conductivity and excellent stretching resilience, can be used as an excellent stretchable conductor material, and has huge application potential in the aspects of monitoring human body dynamic activities, monitoring mechanical movement, monitoring a man-machine interaction process and the like.

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 relates to the field of synthetic materials, in particular to a polyimide water-phase synthetic method and application. Comprising the following steps: adding blocked diisocyanate and tetracarboxy dianhydride into water, adding a salt-forming agent, and carrying out polymerization reaction to obtain a polyimide solution. A closed diisocyanate unit is used for replacing a diamine monomer, so that water-phase synthesis of polyimide is realized, excellent mechanical properties are achieved, the mechanical properties and heat resistance of the polyimide are close to those of oily polyimide, and the structure of water-based polyimide is enriched.

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 provides a polydisulfide degradable high polymer material containing an amide group and a preparation method thereof. The preparation method comprises the following steps: S100, preparing a lipoic acid polymer from a raw material comprising a lipoic acid monomer through cationic polymerization or cationic copolymerization reaction; and S200, adopting raw materials comprising a lipoic acid polymer and isocyanate or isocyanate to prepare the polydisulfide degradable high polymer material containing the amide group. According to the preparation method disclosed by the invention, the polydisulfide degradable high polymer material containing the amide group can be obtained, and a new group can be introduced to the polydisulfide, so that the polydisulfide is endowed with good performance.

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 belongs to the technical field of flame retardants, and relates to a high-strength hyperbranched halogen-free flame retardant as well as a preparation method and application thereof, the preparation method comprises the following steps: preparing a modified isocyanate silane coupling agent from bis (3-aminophenyl) phenylphosphine oxide and 3-isocyanatopropyltriethoxysilane; the preparation method comprises the following steps: preparing a modified amino silane coupling agent from triglyceride isocyanurate and 3-aminopropyltriethoxysilane; the high-strength hyperbranched halogen-free flame retardant is prepared from a modified isocyanate silane coupling agent and a modified amino silane coupling agent. The silane coupling agent is modified according to the principle that an isocyanate group on the surface of the silane coupling agent can chemically react with a tertiary amine group and an epoxy group can react with an amino group, the two modified silane coupling agents form the hyperbranched flame retardant after being hydrolyzed, the highly branched structure enables the intermolecular force to be small, and the hyperbranched flame retardant has the advantages of high flame retardance and high flame retardancy. And the flame retardant shows excellent mechanical strength and excellent flame retardant effect.

The invention discloses an in-situ inorganic hybridization reinforced polyurethane resin and a preparation method thereof. An inorganic in-situ bonding structure of the in-situ inorganic hybridization reinforced polyurethane resin can effectively control the strength and hardness of the polyurethane resin; and the organic auxiliary agent can effectively reduce the curing speed of the high-activity component, so that the system resin can be simultaneously applied to use scenes with different curing speeds and different hardness requirements. The in-situ inorganic hybridization reinforced polyurethane resin comprises a component A and a component B. The component A is prepared from the following components in parts by mass: 100 parts of isocyanate-terminated polyurethane oligomer, 4.5 to 102 parts of monomer polyisocyanate b, 2.9 to 4.4 parts of reaction speed regulator and 0 to 1.2 parts of catalyst a; the component B is prepared from the following components in parts by mass: 14.5 to 89.6 parts of silanol, 0 to 2 parts of glycerol and 0 to 1.2 parts of catalyst b; wherein in use, the component A and the component B are mixed according to the mass ratio of (1.66-7.1): 1 to obtain the in-situ inorganic hybridization reinforced polyurethane resin.

The invention discloses a thermoplastic polyurethane color-changing film which comprises a core layer, a first outer layer and a second outer layer, the first outer layer and the second outer layer are arranged on the two sides of the core layer respectively, and the core layer is a colored layer; the core layer, the first outer layer and the second outer layer all comprise TPU particles and functional master batches, raw materials of the functional master batches comprise a first TPU carrier and anti-ultraviolet particles, the anti-ultraviolet particles sequentially comprise inorganic anti-ultraviolet particles, a coating layer, a transition layer and an organic anti-ultraviolet outer layer from inside to outside, the transition layer is isocyanato-terminated polyurethane, and the organic anti-ultraviolet outer layer is an organic anti-ultraviolet outer layer. And the raw materials of the coating layer and the organic anti-ultraviolet outer layer both contain hydroxyl. The inorganic uvioresistant particles, the coating layer, the transition layer and the uvioresistant particles of the organic uvioresistant outer layer are sequentially arranged from inside to outside, and the dispersity of the uvioresistant particles in the film layer is improved through the transition layer made of aliphatic isocyanate; the inorganic uvioresistant particles and the organic uvioresistant outer layer are combined to improve the uvioresistant performance of the color changing film; the stability of the structure and performance of the anti-ultraviolet particles is improved through the transition layer.

The invention relates to the field of adhesives, and discloses an environmentally friendly urea-formaldehyde resin adhesive and a preparation method thereof. The environmentally friendly urea-formaldehyde resin adhesive comprises the following components in parts by weight: 45-60 parts of urea, 50-80 parts of formaldehyde solution, 10-25 parts of a modified additive, and 5-15 parts of modified polyvinyl alcohol; the modified additive is a modified additive prepared by grafting isophorone diisocyanate onto multi-walled carbon nanotubes loaded with nano-titanium dioxide and further sealing isocyanate with sodium bisulfite; the modified polyvinyl alcohol is modified polyvinyl alcohol grafted with sodium methyl silicate. The invention reduces the free formaldehyde content in the prepared urea-formaldehyde resin adhesive by adding the modified additive and the modified polyvinyl alcohol, and the prepared plywood has low formaldehyde release, is safe and environmentally friendly, and has excellent bonding strength and water resistance.

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a high-temperature-resistant self-whitening polyurethane elastomer for hand handling as well as a preparation method and application thereof. The hand-made high-temperature-resistant self-whitening polyurethane elastomer is composed of a component A and a component B according to the mass ratio of 100: (95-105), and the component A is a curing agent and comprises the following raw materials: polyether polyol 1, polyether polyol 2, an antioxidant and a catalyst; and the component B is an isocyanato-terminated polyurethane prepolymer and is prepared from the following raw materials: polyether polyol 3 and diisocyanate. The high-temperature-resistant self-whitening polyurethane elastomer for the hand office is excellent in mechanical property, good in high-temperature resistance and aging resistance, capable of whitening automatically after reaction and comfortable in hand feeling, the appearance of the product is milky white, color mixing is convenient, and when the high-temperature-resistant self-whitening polyurethane elastomer is applied to hand office manufacturing, the product is resistant to high temperature, good in toughness, not prone to breaking and discoloring and diverse in color change; the invention also provides a preparation method thereof.

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 present disclosure provides a polymetallic-ore beneficiation and separation reagent, a preparation method therefor and use thereof. The preparation method for a polymetallic-ore beneficiation and separation reagent, includes following steps: (1) mixing a substance A, caustic soda, soda ash and sodium polysulfide, and then heating the same and performing a catalytic reaction, to render an intermediate product B, wherein the substance A includes one or more of urea, glycine, urea peroxide, ammonium cyanate and isocyanic acid; and (2) mixing the intermediate product B with trichloroisocyanuric acid, dichloroisocyanuric acid and 2-amino-3-(4-imidazolyl)propanoic acid, to render the polymetallic-ore beneficiation and separation reagent.

To provide a method for producing a blocked isocyanate composition with excellent continuous operability.SOLUTION: A method for producing a blocked isocyanate composition comprises: a first step of reacting a primary amine compound, a carbonate derivative represented by one or both of the specified general formulas (II) and (III), and a blocking agent, through heat treatment so as to obtain a first blocked isocyanate composition; and a second step of converting the carbonate derivative represented by one or both of the specified general formulas (II) and (III) contained in the first blocked isocyanate composition into a structure represented by the general formula (I) in the figure so as to obtain a second blocked isocyanate composition.SELECTED DRAWING: None

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 discloses a wear-resistant and stain-resistant leather surface treating agent and a preparation method thereof, and belongs to the technical field of leather treating agents. The leather surface treating agent is prepared from the following raw materials in parts by weight: 70 to 90 parts of modified polyurethane emulsion for leather, 0.4 to 0.6 part of a de-foaming agent, 0.4 to 0.6 part of a flatting agent, 0.8 to 1.2 parts of a wetting agent, 04 to 0.6 part of a thickening agent, 1.2 to 1.8 parts of a coalescing agent and 20 to 40 parts of water, the modified polyurethane emulsion for the leather is prepared by reacting hydroxyl-terminated polyether modified silicone oil, hydroxyl-terminated POSS (Polyhedral Oligomeric Silsesquioxane) modified silicone oil, polytetrahydrofuran ether glycol, dicyclohexylmethane-4, 4 '-diisocyanate, 2, 2-dimethylolpropionic acid, ethyl methacrylate and triethylamine, adding water and dispersing. According to the leather surface treatment agent prepared by the invention, the specific modified polyurethane emulsion for leather is used, so that the wear resistance and the pollution resistance of the leather surface treatment agent are remarkably improved, and lasting protection can be provided for leather products.

The invention discloses quartz sand for fracturing and a preparation method thereof, and relates to the technical field of quartz sand for fracturing. The quartz sand for fracturing comprises the following raw materials in parts by weight: 50 parts of quartz sand and 5-8 parts of an organic silicon modified epoxy resin coating agent. The preparation method comprises the following steps: carrying out a reaction on PEG800 and 2, 6-toluene diisocyanate to prepare a transparent colloidal solid, carrying out a reaction on the transparent colloidal solid and bisphenol A epoxy resin to prepare an intermediate, and carrying out a reaction on the intermediate and aminopropyl methyl polysiloxane to prepare the organosilicon modified epoxy resin coating agent. The prepared quartz sand for fracturing has high sphericity, low density and high flow conductivity.

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 an efficient heat shrink tube preparation method and equipment thereof. FEP granules and modified CaSi2 are fed into an extruder to be extruded, and an FEP pipe is obtained; placing the FEP pipe in an expansion box, taking out the FEP pipe after the pressure in the FEP pipe and the pressure in the expansion box reach expansion pressure and are stabilized for a period of time and the pressure and the temperature in the expansion box and the FEP pipe are reduced to normal pressure and low-temperature oil temperature, and respectively washing the inside and the outside of the FEP pipe with water until the product meets the use requirement; the modified CaSi2 is prepared by the following steps: reacting CaSi2 powder, DMF (Dimethyl Formamide), isocyanatopropyltriethoxysilane, 4-hydroxyphenylboronic acid pinacol ester, lanthanum 5-hydroxyisophthalate, organic tin and methylbenzene, washing, carrying out suction filtration, and drying, thereby obtaining the modified CaSi2. The lanthanum 5-hydroxyisophthalate disclosed by the invention is prepared from 5-hydroxyisophthalic acid and lanthanum nitrate; the heat-shrinkable tube prepared by the invention has a relatively high heat shrinkage ratio.

The invention belongs to the technical field of polyurethane adhesives, and particularly relates to a two-component polyurethane structural adhesive as well as a preparation method and application thereof. The bi-component polyurethane structural adhesive comprises a component A and a component B which are independently stored, the component A comprises polyester polyol, polyether polyol, castor oil polyol and optional first filler, first molecular sieve, first plasticizer and first aid; the component B comprises an isocyanate compound, an isocyanate double-terminated polyurethane prepolymer and optional second filler, a second molecular sieve, a second plasticizer and a second aid; the first filler and the second filler are independently selected from filler modified by a silane coupling agent. The key of the invention lies in that polyester polyol, polyether polyol and castor oil polyol with long carbon chain structures are introduced as polyol raw materials, and a specific filler modified by a silane coupling agent is introduced, so that the obtained bi-component polyurethane structural adhesive has excellent interfacial shear strength and T peel strength at the same time.

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 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.The protective film comprises SEBS, polypropylene, modified halloysite nanotubes, modified silicon dioxide and auxiliaries; the modified halloysite nanotube is prepared by reacting a functional additive prepared by grafting an isocyanato antioxidant component and a modified benzothiazole-containing monomer with 3-chloropropyltrimethoxysilane, and then grafting on the surface of the halloysite nanotube; the isocyanated antioxidant component is prepared by reacting 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid with N-hydroxymethyl acrylamide, then reacting the product with 2-mercaptoethanol to obtain a hydroxylated antioxidant component, and then reacting the hydroxylated antioxidant component with isophorone diisocyanate; the modified benzothiazole-containing monomer is prepared by reacting 2-aminobenzothiazole with bromoacetyl bromide and then reacting with 3, 5-dihydroxybenzylamine, and the protective film prepared by the invention has good thermo-oxidative aging resistance, antibacterial property, heat resistance and tensile property.

The invention discloses a high-performance, weather-resistant and yellowing-resistant polyurethane adhesive as well as a preparation method and application thereof. The high-performance, yellowing-resistant and weather-resistant polyurethane adhesive is prepared from the following raw materials in parts by weight: 10 parts of isocyanurate polyol, 18 to 32 parts of isocyanate, 198 to 689 parts of polymer polyol, 37 to 90 parts of polyisocyanate, 26 to 164 parts of plasticizer and 1.3 to 8.2 parts of catalyst. The isocyanate adopted by the invention is aliphatic and / or alicyclic isocyanate and a polymer thereof, no anti-yellowing agent or light stabilizer is added, the problem of yellowing of polyurethane can be thoroughly solved, the high-activity micromolecular isocyanurate polyol reacts with excessive isocyanate, and the yellowing resistance of the polyurethane is improved. Reacting the obtained isocyanate oligomer with excessive polymer polyol under the assistance of a small amount of catalyst, so that the isocyanate is completely reacted to obtain a hydroxyl-terminated polyurethane prepolymer; and reacting with excessive polyisocyanic acid to obtain the weather-resistant and yellowing-resistant polyurethane adhesive with a certain structure, and keeping excellent physical and mechanical properties at the same time.

The present invention belongs to the technical field of artificial boards, and relates to a curing agent for a formaldehyde-free substrate, which is composed of 5-10wt% of methyl ethyl ketone oxime, 20-30wt% of polyacrylamide, and the balance of water by weight percentage. A preparation method and application of the curing agent for the formaldehyde-free substrate are also disclosed. The curing agent for the formaldehyde-free substrate disclosed by the present invention has good sealing property, can reduce the viscosity of isocyanate, extend the application period, and improve the fluidity and dispersibility of spray glue. By sealing the free isocyanate group, the pre-curing during drying is reduced, and the isocyanate is unsealed during high-temperature hot pressing, and the isocyanate is cured quickly, the hot pressing efficiency is improved, the hot pressing time is shortened, and the water loss is reduced; more active isocyanate groups are retained in the adhesive, the bonding performance and water resistance are improved, the amount of isocyanate glue applied is reduced, and the reaction with water is reduced. The present invention can also effectively improve the production capacity of the formaldehyde-free floor substrate and reduce the cost; by increasing the moisture content, the expansion or contraction degree caused by the change of humidity in the external environment is reduced, and the dimensional stability is improved.

The invention discloses an anti-ultraviolet matte polyester film which comprises a base film as a middle layer; the matte surface layer is at least arranged on one surface of the base film; the matt surface layer comprises first matt particles and second matt particles, the first matt particles are silicon dioxide modified and grafted with an organic anti-ultraviolet agent through a silane coupling agent, the second matt particles are silicon dioxide modified and grafted with the organic anti-ultraviolet agent through isocyanato-terminated polyurethane, and the organic anti-ultraviolet agent has hydroxyl. The anti-ultraviolet matt polyester film is reasonable in structure, the first matt particles and the second matt particles are compounded, the matt effect of the polyester film is improved and the mechanical property is ensured under the condition of a small amount, and through combination modification of the isocyanato-terminated polyurethane and the silane coupling agent, not only is the dispersity of the particles improved, but also the anti-ultraviolet matt polyester film is prepared. By grafting the organic anti-ultraviolet agent, the anti-ultraviolet performance and the anti-ultraviolet stability are improved, and the mechanical performance of the matte polyester film is optimized.

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 discloses a high-strength ecological environment-friendly water permeable brick and a preparation method thereof, and relates to the technical field of water permeable bricks. The ecological environment-friendly water permeable brick is prepared from the following raw materials in parts by weight: 80 to 100 parts of quartz sand, 10 to 15 parts of cement, 30 to 50 parts of deionized water, 10 to 12 parts of filler, 2 to 5 parts of defoaming agent and 5 to 10 parts of adhesive. The preparation method comprises the following steps: carrying out a reaction on urotropine and tromethamine to prepare a first-generation polymer, then carrying out a reaction on the first-generation polymer and isocyanate-2-chloro-6-methyl phenyl ester to prepare an intermediate 1, and then carrying out a reaction on the intermediate 1 and bisphenol A epoxy resin to prepare an intermediate 2; finally, gamma-aminopropyl triethoxy silane is grafted to the intermediate 2, and the adhesive is prepared. The prepared ecological environment-friendly water permeable brick has good mechanical strength, water permeability and wear resistance.

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.