151 results about "Hyperbranched polyester" patented technology

The invention belongs to the technical field of high polymer materials, and particularly relates to a PET decorative film and a preparation method thereof. The preparation method comprises the following steps: synthesizing hydroxyl-terminated hyperbranched polyester by taking pentaerythritol and 2, 2-dimethylolpropionic acid as raw materials, and reacting with polyol glycidyl ether to prepare an epoxy-terminated organic modifier; silver-loaded nano silicon dioxide subjected to surface treatment by an amino silane coupling agent is used as inorganic functional particles; pET resin, an organic modifier and inorganic functional particles are subjected to melt blending and extrusion granulation, and modified PET is prepared; the modified PET is prepared into the film through a two-way stretching process. Epoxy groups of the organic modifier chemically react with amino groups at the tail end of a PET molecular chain and on the surfaces of inorganic particles respectively, a stable organic-inorganic hybrid network is constructed, synergistic improvement of reinforcement, toughening and long-acting antibiosis is achieved, and the technical problems that functional particles are not uniform in dispersion, interface bonding is weak, and antibacterial components are prone to migration are effectively solved.

The invention discloses a wear-resistant coating and application thereof on a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functionalized polyurethane-acrylate composite emulsion, a photoinitiator, an auxiliary agent and deionized water. Wherein the composite emulsion is prepared from hyperbranched polyester polyol, a dynamic bond chain extender and the like through prepolymerization, fluorine-containing grafting and in-situ sol-gel reaction, a hyperbranched skeleton provides mechanical support, double dynamic bonds endow a self-repairing function, in-situ nano-compounding enhances wear resistance, a diurea hydrogen bond enhances binding force, and a fluorine-containing side chain endows a coating with hydrophobic and stain-resistant performance; and preparing the coating by matching with a gradient curing process. The coating prepared by the invention has high wear resistance, efficient self-repairing property, firm adhesive force, excellent stain resistance and leather adaptation flexibility, and meets the actual requirements of middle and high-end leather finishing.

The invention relates to the technical field of fiber reinforced resin-based composite materials, and discloses a basalt fiber epoxy resin composite material as well as a preparation method and application thereof. Comprising the following steps: carrying out oxygen plasma treatment and dopamine bionic liquid deposition treatment on basalt fibers, dipping the basalt fibers in a mixed coupling agent solution, and coating the basalt fibers with nano TiO2 sol to obtain nano roughened basalt fibers; mixing bisphenol A epoxy resin, hydrogenated bisphenol A epoxy resin, hyperbranched polyesteramine and ionic liquid modified boron nitride nanosheets to obtain resin A; mixing an epoxy curing agent with a curing accelerator to obtain resin B; and mixing the resin A and the resin B to obtain a mixed material, and infiltrating the nano roughened basalt fibers in the mixed material to obtain the basalt fiber epoxy resin composite material. After the basalt fiber is subjected to bionic multi-stage interface treatment, the basalt fiber is matched with the modified epoxy resin, so that the interface strength, the mechanical property and the weather resistance of the composite material are remarkably improved, and the composite material has a relatively good application scene.

The present application relates to the technical field of discontinuous reinforced short fibers, in particular to a high-performance composite short fiber and a preparation method thereof.The present application overcomes the contradiction between the hygroscopicity and mechanical properties of the composite short fiber and the problem of poor skin-core interface compatibility.By reacting acidified carbon nanotubes with hydroxyl-terminated hyperbranched polyester, and then melt extruding with PET chips, a high-strength core layer master batch is obtained;high-density polyethylene, a hydrophilic agent, hydrophilic modified MOF particles and E-GMA copolymer are mixed and extruded to obtain a skin layer PE master batch with long-term hydrophilicity;the skin and core layer master batches are spun into a skin-core structure, and after ring blowing cooling, two-bath drafting, heat setting, mechanical crimping and cutting, a composite fiber is obtained.The prepared PE / PET bicomponent composite short fiber not only has excellent tensile strength, but also has persistent and stable moisture absorption and sweat releasing functions.

The application discloses a wear-resistant coating and application thereof to a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functional polyurethane-acrylate composite emulsion, a photoinitiator, an additive and deionized water. The composite emulsion is prepared through pre-polymerization, fluorine-containing grafting and in-situ sol-gel reaction of hyperbranched polyester polyol, dynamic bond chain extender and the like. The hyperbranched skeleton provides mechanical support, the double dynamic bonds endow the coating with self-repairing function, in-situ nano-composite enhances wear resistance, the double urea hydrogen bonds strengthen the bonding force, and the fluorine-containing side chains endow the coating with hydrophobic and stain-resistant properties. The coating is prepared by matching a gradient curing process. The coating prepared by the application has high wear resistance, efficient self-repairing property, firm adhesion, excellent stain resistance and leather-adaptive flexibility, and meets the actual needs of medium and high-end leather finishing.

The invention discloses a battery shell outer layer composite material, a battery shell outer layer and a preparation method of the battery shell outer layer, and belongs to the technical field of battery shell outer layer composite materials. The matrix resin comprises the following preparation raw materials: 5-18% of modified hydroxyl-terminated hyperbranched polyester, 2-6% of hydrophobic modified silica sol, 2-10% of a lubricant, 2-8% of a heat conduction phase, 0.5-3% of a composite anti-aging agent and the balance of co-polypropylene; the modified hydroxyl-terminated hyperbranched polyester is hydroxyl-terminated hyperbranched polyester treated by a vulcanized maleimide derivative. According to the matrix resin disclosed by the invention, co-polypropylene is taken as a matrix, vulcanized maleimide derivative modified hydroxyl-terminated hyperbranched polyester and modified silica sol are introduced to construct a compatible system, a filler system is further optimized, and finally, the outer-layer composite material of the battery shell is prepared. The composite material for the outer layer of the battery shell is excellent in mechanical property and weather resistance.

The present application relates to the field of rubber, in particular to a kind of flame-retardant neoprene and preparation method thereof.The present application first prepares the raw material of flame-retardant neoprene, mixes and masticates the raw material under certain conditions to obtain mixed rubber, and finally vulcanizes the mixed rubber to prepare a kind of flame-retardant neoprene;Its characteristics lie in that the composition of flame-retardant agent in the raw material of flame-retardant neoprene is the mixture of nano zinc oxide and nano magnesium oxide modified by silane coupling agent grafted onto hyperbranched polyester structure, which can improve the dispersibility of nano structure on one hand, prevent the occurrence of agglomeration phenomenon, and at the same time, the reaction efficiency can be improved by grafting the reactants together;On the other hand, the phosphorus-containing group and nitrogen-containing group of urea and phosphoric acid are grafted onto the hyperbranched polyester structure, so that the groups of hyperbranched polyester are rich in flame-retardant elements nitrogen and phosphorus, thereby significantly improving the flame-retardant performance of neoprene.

The invention discloses a maleic anhydride functional modified polyolefin resin composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. Comprising the following steps: mixing maleic anhydride modified polypropylene, polylactic acid and dicumyl peroxide, banburying, adding modified silicon dioxide, a synergist, epoxidized soybean oil and hydroxyl-terminated hyperbranched polyester, carrying out melt blending, and carrying out water-cooling tabletting and crushing treatment to obtain the maleic anhydride functionalized modified polyolefin resin composition. By introducing maleic anhydride modified polypropylene prepared from polypropylene, maleic anhydride and other components, the adhesive force, impact resistance and flame retardance of the polyolefin resin composition can be effectively improved; and the flame retardance, the corrosion resistance, the impact resistance and the heat resistance of the polyolefin resin composition are further improved due to the introduction of the synergist, the modified silicon dioxide and other components. Therefore, the method has a wider application prospect.

The invention relates to the technical field of polyester fiber processing, in particular to a quick-drying deodorizing antibacterial antistatic polyester fiber and a preparation method thereof. The invention discloses a modified PET (Polyethylene Terephthalate) composite material, which is prepared from the following raw materials in parts by weight: 100 parts of PET, 4 to 8 parts of functional master batch, 5 to 8 parts of epoxy functionalized styrene-acrylate oligomer, 10 to 20 parts of silane coupling agent modified montmorillonite, 5 to 8 parts of hydroxypropyl-beta-cyclodextrin loaded porous silicon dioxide microspheres, 1 to 2 parts of sulfoisophthalic acid metal salt and 2 to 4 parts of dispersing agent. The multifunctional master batch is prepared from the following raw materials in parts by weight: 65-75 parts of PET polyester chips, 8-12 parts of epoxy-terminated hyperbranched polyester, 3-5 parts of a sulfonate antistatic agent and 2-4 parts of an antibacterial agent, through the formula, balanced integration of moisture absorption, quick drying, lasting deodorization, efficient antibacterial and antistatic functions is realized, the function retention rate is improved after multiple times of washing, and the antibacterial property is improved. The defects of single function and poor durability of an after-treatment mode are overcome, and the development requirements of modern textiles on multi-functionalization and high quality are met.

The application relates to the technical field of paint manufacturing, in particular to a method for preparing a water-based hydroxyl acrylate latex and a two-component paint. The preparation method comprises the following steps: performing emulsification treatment on part of acrylate monomers, hydroxyl acrylate monomers, hyperbranched polyester polyol, carboxyl monomers, a crosslinking agent, part of an emulsifier and part of water to obtain a pre-emulsified solution; performing a first polymerization reaction on the remaining acrylate monomers, the remaining emulsifier, part of an initiator and the remaining water to generate a seed emulsion; gradually adding the pre-emulsified solution and the remaining initiator into the seed emulsion to perform a second polymerization reaction, and then adding an additive to perform post-treatment to obtain the water-based hydroxyl acrylate latex. The water-based hydroxyl acrylate latex is prepared by using a free radical emulsion polymerization method and a seed emulsion polymerization process, has low VOC content, is green and environmentally friendly, has high water resistance, strong salt mist resistance, high adhesion to a substrate to be coated, good quick-drying performance and good pigment wrapping performance, and can be used for preparing a two-component paint.

The invention belongs to the technical field of carbon fiber oiling agents, and discloses a silicon-free high-temperature-resistant oiling agent for carbon fibers and a preparation method of the silicon-free high-temperature-resistant oiling agent. In order to solve the problems that an existing silicone oil-free agent is difficult to give consideration to lubrication and high temperature resistance and is single in function, hyperbranched polyester polyol and modified ricinoleate are used as a continuous phase, stearamide is used as a dispersion phase, a compatibility auxiliary agent and modified nano silicon dioxide are matched, and step-by-step dropwise adding and vacuum gradient curing are performed to prepare the silicone oil-free agent. The oiling agent is free of silicon, environmentally friendly, excellent in high-temperature resistance, good in lubricity and antistatic effect, capable of effectively protecting the mechanical property of carbon fibers and reducing processing broken filaments and suitable for a high-temperature carbonization procedure, the raw materials are conventional and easy to obtain, and industrial mass production is easy to achieve.

A silane-modified epoxy resin-based underwater remediation material comprises: silane-modified epoxy resin, PEG-PAA graft copolymer, mussel biomimetic adhesive, hydrophobic nano-kaolin, hyperbranched polyester, carbon nanotube / montmorillonite hybrid material, temperature-controlled microcapsule material, cashew phenol-modified amine curing agent, nano-calcium carbonate whiskers, calcium alginate / PAM dual-network material, cellulose nanofibers, organic bismuth catalyst, and heavy calcium carbonate; this application also includes its preparation and application methods. The silane-modified epoxy resin-based underwater remediation material of this invention can form a strong and reliable bond in an underwater environment, exhibits a high thixotropic index, a low chloride ion diffusion coefficient, and strong resistance to water erosion, meeting the requirements for underwater use and construction; it also meets environmental protection requirements, reducing harm to the environment and construction personnel, and achieving green and environmentally friendly construction.

This invention relates to the field of carbon nanotube technology, specifically disclosing a high-viscosity carbon nanotube conductive paste and its preparation method. The raw materials for this high-viscosity carbon nanotube conductive paste include ultra-long single-walled carbon nanotubes, short-cut multi-walled carbon nanotubes, conductive carbon black, carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, polyacrylic acid, fluorinated silane coupling agent, γ-butyrolactone, and N-methylpyrrolidone. The high-viscosity carbon nanotube conductive paste provided by this invention achieves uniform dispersion, low volume resistivity, excellent anti-settling properties, and good coating processability of the carbon nanotube conductive paste under high solids content through the synergistic effect of the carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, the fluorinated silane coupling agent, and polyacrylic acid, combined with multi-stage grinding and high-pressure homogenization processes.

The invention discloses ultraviolet-cured woodware anti-doodling matte finish paint and a preparation method thereof, and relates to the technical field of anti-fouling paint. The preparation method comprises the following steps: carrying out a reaction on a polyurethane prepolymer and hydroxyalkyl methacrylate to prepare hexafunctional-group anti-doodling polyurethane acrylate; the hyperbranched polyester acrylate is synthesized by taking pentaerythritol, 2, 2-dimethylolpropionic acid, succinic anhydride and hydroxyethyl methylacrylate as raw materials. The photo-initiation auxiliary agent is formed by combining a hydrogen abstracting type free radical initiator and hydroxyl-containing isocyanate modified amine according to a strict proportion, and the anti-doodling ultraviolet curing matte finish paint with excellent anti-doodling performance, high curing rate, good matte effect and high adhesive force and construction tolerance is formed; the anti-doodling matte paint has the advantages of being excellent in anti-doodling performance, matte effect and physical performance, high in construction efficiency and easy to operate.

The invention discloses a modified polyester film for hot-pressing lamination of an EVA (Ethylene Vinyl Acetate) adhesive film and a preparation method of the modified polyester film, belongs to the technical field of high polymer materials, and aims to solve the problem of insufficient adhesion between a common PET (Polyethylene Terephthalate) film and the EVA adhesive film. The film is prepared from modified polyester master batches through the processes of melt extrusion, shock chilling sheet casting, two-way stretching and heat setting, and the modified polyester master batches are prepared from 80-95 parts of common polyester resin, 5-12 parts of hydroxyl-terminated hyperbranched polyester resin, 1-3 parts of polymeric aliphatic carbodiimide and 0.5-5 parts of a compound containing a vinyl acetate structure through melt blending granulation. Through the chemical bonding effect of polymerized aliphatic carbodiimide, hydroxyl-terminated hyperbranched polyester and a compound containing a vinyl acetate structure are connected into a PET main chain, the interface bonding performance is improved by means of the synergistic effect of chemical bonding and physical compatibility, and meanwhile good damp-heat aging resistance is achieved.

The invention discloses a flame-retardant polyester modified urea-formaldehyde adhesive as well as a preparation method and application thereof, and belongs to the technical field of wood processing and artificial board adhesives. The preparation method comprises the following steps: mixing glycerol and maleic anhydride, and carrying out first heating reaction to obtain a polyester prepolymer; mixing the polyester prepolymer and glycerin, and carrying out a second heating reaction to obtain functionalized hyperbranched polyester; dissolving the functionalized hyperbranched polyester in acetonitrile, then adding phenylphosphoryl dichloride for reaction, heating and stirring for reaction, and removing the solvent and byproducts after the reaction is finished to obtain hyperbranched flame-retardant polyester; and uniformly mixing the hyperbranched flame-retardant polyester aqueous solution, urea-formaldehyde resin and water to obtain the modified urea-formaldehyde adhesive. Through an innovative strategy of'structural design-chemical bonding ', the long-standing core contradiction that'flame retardance-performance' is difficult to consider in urea resin flame-retardant modification is successfully solved, an efficient and durable flame-retardant modification solution with excellent comprehensive performance is provided, and the industrial application value is significant.

This invention discloses a high-resilience EPDM rubber sealing gasket and its preparation method, belonging to patent classification number C08K13 / 02, and relating to the field of EPDM rubber technology. The method first introduces flexible segments composed of liquid polyisobutylene and hydroxyl-terminated polybutadiene into an EPDM matrix to construct a low-energy-consumption subelastic network; then, a core-shell structure filler with silica as a rigid core and acrylate copolymer as an elastic shell is prepared to eliminate the rigid constraints of traditional filler interfaces; simultaneously, hyperbranched polyesteramide and nano-boron nitride are introduced as a synergistic system to bridge the polarity difference between the flexible segments and the core-shell filler through molecular bridging, and to reduce energy loss by utilizing the low friction and thermal conductivity of nano-boron nitride. The resulting sealing gasket exhibits high resilience, low compression set, and excellent mechanical strength.

The invention provides a titanium dioxide slurry and a coating using the same, the titanium dioxide slurry comprises the following components by weight: 70-75 parts of titanium dioxide, 0.3-2 parts of hyperbranched polyester, 0.2-1.5 parts of a multifunctional regulator, and 0.5-3.5 parts of a dispersant; the number-average molecular weight of the hyperbranched polyester is 1000 to 8000 g / mol, and the hydroxyl value of the hyperbranched polyester is 350 to 650 mg KOH / g; the multifunctional regulator is organic amine, and the organic amine comprises at least one of 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1, 3-propylene glycol and triethanolamine; the dispersing agent is a modified styrene-maleic acid copolymer solution, and the content of active ingredients in the modified styrene-maleic acid copolymer solution is not less than 30%. The titanium dioxide slurry has good dispersity and storage stability, so that the titanium dioxide slurry can be well dispersed and stably exist in a coating when being applied to the coating as a pigment, high covering power is achieved, and when the titanium dioxide slurry is applied to stain-resistant and matte coatings, it can be guaranteed that the coating still has good stain resistance and matte performance.

The invention relates to a bio-based fabric conversion process, which belongs to the technical field of fabrics, and comprises the following steps: mixing glycerol, itaconic acid and 4-toluene sulfonic acid according to a mass ratio of (9.0-10.0): (12.5-13.5): (0.01-0.02), introducing nitrogen for protection, heating to 140-160 DEG C, carrying out melt polycondensation reaction for 2-4 hours, vacuumizing, carrying out vacuum dehydration treatment for 1-3 hours, and cooling to obtain hydroxyl-terminated hyperbranched polyester; the hydroxyl-terminated hyperbranched polyester is dissolved in anhydrous acetone, isophorone diisocyanate and dibutyltin dilaurate are added, the mass ratio of the isophorone diisocyanate to the hydroxyl-terminated hyperbranched polyester is (1.0-1.2): 1, the mixture is stirred at the constant temperature of 50-60 DEG C for a reaction for 1.5-2.5 h, an isocyanate-terminated prepolymer is prepared, and the isocyanate-terminated hyperbranched polyester-dibutyltin dilaurate copolymer is obtained. The formed flexible cross-linked network can effectively disperse stress concentration when the fibers are subjected to external force, and accumulation of stress on a single cross-linked point is avoided.

The present invention relates to the technical field of polymer polyols, and disclosed are a high-functional composite macromolecular monomer, a preparation method therefor, and a use thereof. A technical solution thereof is: S1, reacting an initiator with an epoxy compound under the action of a catalyst, to obtain a polyether polyol intermediate; S2, using the polyether polyol intermediate and a hyperbranched polyester polyol as a composite initiator, reacting with an epoxy compound under the action of a catalyst, to produce a polyether / polyester ether polyol; S3, reacting the polyether / polyester ether polyol with an unsaturated isocyanate under the action of a catalyst, to generate a high-functional composite macromolecular monomer. The present invention increases the functionality of the macromolecular monomer by means of the initiator, increases the dispersibility of the macromolecular monomer in a polymer polyol, improves the stability of styrene–acrylonitrile copolymer particles in a polymer polyol, and reduces the viscosity of a polymer polyol; introducing a polyester system into the macromolecular monomer structure increases the proportion of hydrophobic groups in polymer polyols, reducing the occurrence of hydrogel formation upon exposure to water.

The invention discloses a polyamide composition as well as a preparation method and application thereof. The polyamide composition comprises the following components in parts by weight: 58-82 parts of polyamide resin; 18 to 42 parts of micro-crosslinked polyamide resin; 3-10 parts of a core-shell toughening agent; 30 to 50 parts of modified carbon fiber; 1-5 parts of a compatilizer; wherein the core-shell toughening agent comprises a core layer of epoxy functional polysiloxane and a polyurethane shell layer; the modified carbon fiber sequentially comprises a carbon fiber, a hyperbranched polyester layer and a polydopamine-graphene oxide layer from inside to outside. The polyamide resin is adopted as matrix resin, and the core-shell toughening agent comprising the epoxy functional polysiloxane core layer and the polyurethane shell layer, the modified carbon fiber and the micro-crosslinked polyamide resin are added, so that the low-temperature toughness of the polyamide composition can be effectively improved, and the modulus is relatively high.

The application discloses a kind of high-performance polypropylene material, polarizing material and its preparation method and application, belong to high polymer material technical field.The high-performance polypropylene material provided by the application includes: PP matrix resin 70-90 parts, cyclic olefin copolymer 5-15 parts, reactive monomer 0.5-2 parts, terminal hydroxyl hyperbranched polyester 0.5-2.0 parts, crown ether modified nano zinc oxide 1-5 parts, ionomer precursor 0.1-0.5 parts, initiator 0.05-0.2 parts, transparent nucleating agent 0.1-0.3 parts and antioxidant 0.2-0.5 parts by weight.The high-performance polypropylene material provided by the application has high transparency, low haze, high interfacial bonding strength, thermal stability and excellent dimensional stability, is suitable for polarizing sheet protective film field, and has good prospect.

The invention discloses a bone glue-based high-strength membrane material which comprises the following raw materials in parts by mass: 5-10 parts of bone glue, 1-5 parts of hydroxyl-terminated hyperbranched polyester and 85-95 parts of a dispersion medium. The invention also discloses a preparation method of the bone glue-based high-strength membrane material, which comprises the following steps: by taking glycerol and maleic anhydride as raw materials, carrying out esterification reaction to synthesize hydroxyl-terminated hyperbranched polyester; and then compounding the composite material with bone glue through a solution blending-casting film forming process. Multiple hydrogen-bond interaction is formed between the hydroxyl-terminated hyperbranched polyester and bone glue molecules, so that the strength of the membrane material is improved; meanwhile, a large amount of free volume is generated among molecular chains due to the highly branched three-dimensional spherical structure, and the toughness of the material is effectively improved, so that the problem that a traditional small-molecule plasticizer is easy to migrate is solved. According to the prepared membrane material, biomass materials serve as main raw materials, certain biodegradability is achieved in the natural environment, the tensile strength is larger than or equal to 20 MPa, and the elongation at break is larger than or equal to 5%.

The invention discloses an impact-resistant electronic component waterproof powder coating and a preparation process thereof, and relates to the technical field of electronic component coatings, the impact-resistant electronic component waterproof powder coating comprises epoxy resin, a curing agent, an inorganic filler, an organosilicon modified hyperbranched polyester flexibilizer and an auxiliary agent; the organic silicon modified hyperbranched polyester toughening agent is prepared by the following steps: carrying out melt polycondensation on a polyhydroxy compound and excessive polybasic acid anhydride which are used as raw materials to construct a carboxyl-terminated hyperbranched polyester core, and partially grafting the core by utilizing polysiloxane containing an epoxy group to introduce a flexible hydrophobic chain segment, so as to obtain the organic silicon modified hyperbranched polyester toughening agent. And carrying out end-capping modification on the residual end carboxyl group by using epoxy chloropropane under an alkaline condition. By constructing a chemically anchored rigid core-flexible shell topological structure, impact energy and thermal stress are effectively dispersed, excellent heat resistance and dimensional stability are maintained while the coating is prevented from cracking, phase separation and water vapor permeation are completely eradicated through a built-in compact hydrophobic network, and lasting and reliable mechanical protection and insulation guarantee are provided.

The invention relates to the technical field of powder coatings, in particular to a low-temperature curing environment-friendly highlight powder coating and a preparation method thereof. The coating prepared by the invention overcomes the problems of poor curing property and poor environmental protection property. The coating comprises carboxyl-terminated hyperbranched polyester, epoxy resin, crystalline binary acid, a microcapsule accelerator and a modified inorganic filler. The microcapsule is prepared by adopting a dimethyl carbonate green solvent and a reduced-pressure recovery process, so that formaldehyde and VOCs (Volatile Organic Compounds) residues are completely eradicated from the source; the bottleneck of low-temperature leveling is broken through by utilizing an instantaneous low-viscosity effect generated by synergism of a hyperbranched structure and a crystallization auxiliary agent; the superfine filler is activated in situ through the titanate coupling agent, interface defects are eliminated, and the impact resistance is enhanced. The coating has excellent storage stability and 130 DEG C rapid curing capacity, and a coating film shows high gloss and high distinctness of image and meets the strict environmental protection standard.

The invention relates to the field of anticorrosive paint, in particular to hyperbranched epoxy resin anticorrosive paint and a preparation method thereof. The coating is a two-component system, wherein a component A comprises an epoxy resin main body, 5-20 parts of a hydroxyl-terminated hyperbranched polyester modifier, a flaky filler, an anti-rust pigment, a reactive diluent and an auxiliary agent; the algebra of the hyperbranched polyester is G2-G4, and the hyperbranched polyester is prepared by melt polycondensation of trimethylolpropane and 2, 2-dimethylolpropionic acid; and the component B is a polyamide curing agent. The preparation method comprises the following steps: synthesizing hyperbranched polyester; pre-mixing the component A with epoxy resin, grinding and dispersing with filler and auxiliaries, and mixing paint to obtain a component A; mixing a curing agent with a coupling agent to obtain a component B; by utilizing the unique structure of the hyperbranched polyester, the epoxy coating is obviously toughened on the premise of not losing the hardness, the viscosity of the system is reduced, the constructability and the filler dispersity are improved, and finally the high-performance coating with impact resistance, strong adhesion and long-acting corrosion resistance is obtained.

The invention relates to the technical field of electronic packaging materials, and discloses a high-temperature-resistant edge sealing adhesive for flexible electronic paper and a preparation method of the high-temperature-resistant edge sealing adhesive. The edge sealing adhesive is prepared from polysiloxane modified epoxy resin, four-functionality epoxy resin, hydroxyl-terminated hyperbranched polyester, a titanate coupling agent, a reactive diluent, a modified alicyclic amine curing agent, an accelerant and fumed silica. Through a high-temperature vacuum pre-reaction process, a titanate coupling agent and hydroxyl in a resin system are subjected to an in-situ reaction, and a coordination structure with dynamic latent characteristics is formed. According to the structure, the working life of a glue solution is remarkably prolonged by utilizing a steric hindrance effect, and a hydrophobic long-chain coating layer is formed by migration in a curing process. The edge sealing adhesive has excellent high temperature resistance, toughness and damp-heat aging resistance, and can meet the harsh packaging requirements of flexible electronic paper.

The invention discloses a hyperbranched photocuring waterborne polyurethane film and a preparation method thereof. The film is formed by ultraviolet curing of a dispersion comprising the following raw materials: regular hydroxyl-terminated hyperbranched polyester polyol; linear polyester or polyether glycol; an aliphatic diisocyanate; a hydrophilic chain extender; a crosslinking agent containing a dynamic disulfide bond; a (methyl) acrylate end-capping reagent containing a hindered amine light stable group; a neutralizer; deionized water; a photoinitiator; and nano silicon dioxide. The method comprises the following steps: preparing a prepolymer; carrying out chain extension and dynamic crosslinking; carrying out photosensitization end capping and neutralization; emulsifying and dispersing; and forming a film and curing. According to the preparation method disclosed by the invention, a water-based light-cured polyurethane film with long-acting weather resistance, damage self-repairing capability and excellent mechanical property is successfully prepared by carrying out integrated collaborative design on a chemical bonding type hindered amine light-stable group, a dynamic disulfide bond and a regular hyperbranched skeleton in a synthesis process.

The invention provides an oil-soluble demulsifier for thickened oil as well as a preparation method and application of the oil-soluble demulsifier, and belongs to the technical field of oilfield chemistry. Comprising a basic component and an organic solvent, and the basic component comprises the following components in percentage by mass: 80-92% of a hyperbranched polyether-polyester block copolymer, 5-15% of alkylphenol polyoxyethylene ether phosphate and 3-8% of dialkylphenol polyoxyethylene ether; the hyperbranched polyether-polyester block copolymer is prepared from the following raw materials through an alkoxylation reaction: hyperbranched polyester, epoxypropane and ethylene oxide. The hyperbranched polyether-polyester block copolymer is adopted as a main demulsifier, alkylphenol polyoxyethylene ether phosphate is introduced as a synergistic penetrant, and dialkylphenol polyoxyethylene ether is adopted as a low-temperature activator, so that the provided oil-soluble demulsifier for the thickened oil not only can quickly and efficiently demulsify the thickened oil, but also can keep a good dehydration rate under a low-temperature condition.