393 results about "Diglycidyl ether" patented technology

The present invention relates to the field of biomedicine technology, specifically a preparation method of a silk fibroin hyaluronic acid filler for injection. The present invention concentrates a silk fibroin solution to obtain a concentrated silk fibroin solution, and then dilutes it to obtain a diluted silk fibroin solution; the diluted silk fibroin solution is heated to form a silk fibroin gel, granulated to obtain silk fibroin gel particles; 1,4-butanediol diglycidyl ether and a sodium hydroxide solution are mixed uniformly, hyaluronic acid and 1 / 3 of the mass fraction of hydroxyapatite are added, after stirring uniformly, swelling, purification and granulation are carried out, and the remaining mass fraction of hydroxyapatite is added to obtain composite gel particles; the composite gel particles and the silk fibroin gel particles are mixed uniformly, added to the gel to mix, and a silk fibroin hyaluronic acid filler is obtained, which effectively prolongs its degradation time.

The invention relates to a poly-(2-oxazoline) epoxy derivative and application thereof, and belongs to the technical field of crosslinking. The invention provides a poly-(2-oxazoline) epoxy derivative, which is completely different from existing cross-linking agents such as 1, 4-butanediol diglycidyl ether (BDDE), divinyl sulfone, glycidyl methacrylate and the like in structure, and has the advantages that the structure is simple; the polymer can be used as a cross-linking agent for cross-linking natural high-molecular polymers such as polysaccharide (such as hyaluronic acid) and protein and synthetic high-molecular polymers such as polyethylene glycol and polyvinyl alcohol. Compared with an existing cross-linking agent, the poly-(2-oxazoline) epoxy derivative has the advantages that the poly-(2-oxazoline) epoxy derivative can be easily subjected to a cross-linking reaction with high-molecular polymers such as hyaluronic acid, the prepared cross-linked substances such as sodium hyaluronate gel are more stable and uniform, the performance of the prepared cross-linked substances is easier to regulate and control and the like, and the poly-(2-oxazoline) epoxy derivative has a great application prospect.

The invention relates to the technical field of lithium battery diaphragms, and discloses a water-soluble gel electrolyte, a preparation method thereof, water-based slurry and application. The preparation method of the water-soluble gel electrolyte comprises the following steps: in the presence of an initiator, carrying out first polymerization reaction on methyl methacrylate and N-isopropylacrylamide to obtain an intermediate I; carrying out second polymerization reaction on the polymer solution A and the polymer solution B to obtain an intermediate I; the polymer solution A contains an intermediate I with the concentration of 8-12wt%; the polymer solution B contains neopentyl glycol diglycidyl ether with the concentration of 0.5 to 1.2 weight percent; and carrying out heating treatment on the intermediate I to obtain the water-soluble gel electrolyte. When the water-soluble gel electrolyte is applied to the battery diaphragm, the addition amount of the electrolyte can be reduced during electrolyte injection in a battery cell, and the cost is effectively reduced; battery leakage is reduced, and the safety performance of the battery cell is improved; and the internal resistance can be reduced, and the cycle performance of the battery cell can be improved.

The invention discloses a preparation method of sandwich type immunomagnetic beads with high thermal stability, which comprises the following steps: by taking polystyrene microspheres as a template, introducing oil-phase Fe3O4 nanoparticles into the polystyrene microspheres through a swelling method, and then carrying out hydrolytic condensation reaction on the surface of a microsphere assembly by utilizing n-octyltrimethoxysilane OTMS to obtain the sandwich type immunomagnetic beads with high thermal stability. The preparation method comprises the following steps: carrying out surface amination modification on a silicon dioxide thin layer which is grown by hydrolysis of tetraethoxysilane TEOS to realize coating of an outermost organic shell layer, carrying out surface amination modification, and carrying out cross-linking on 1, 4-butanediol diglycidyl ether and erythritol on the surface to form an epoxy polymer layer so as to obtain the sandwich-type immunomagnetic bead with a cross-linked epoxy polymer layer introduced to the outer layer. According to the epoxy group modification process on the surface of the magnetic bead, a direct cross-linking modification process is adopted, so that the operation steps are simplified, and the obtained epoxy group magnetic bead is ensured to show excellent biocompatibility. In addition, the method omits the tedious process of functional group activation, and allows direct coupling with the antibody, thereby greatly improving the efficiency and convenience of the experiment.

The invention provides a modified amine curing agent, a preparation method, epoxy resin anticorrosive paint and application, and belongs to the technical field of paint. The modified amine curing agent provided by the invention is prepared from preparation raw materials including alicyclic diamine, m-xylylenediamine, a first glycidyl ether reagent, a second glycidyl ether reagent and a glycidyl ester reagent through amination reaction, the alicyclic diamine contains at least one primary amine group; the first glycidyl ether reagent is ethylene glycol diglycidyl ether and / or bisphenol A type diglycidyl ether; and the second glycidyl ether reagent is 1, 4-butanediol diglycidyl ether and / or C12-14 glycidyl ether. The modified amine curing agent is combined with the curing characteristics of amide and phenolic aldehyde amine, the epoxy resin anticorrosive paint prepared from the modified amine curing agent has a proper curing speed, the adhesive force of a cured coating is high, the anticorrosive effect is good, and the epoxy resin anticorrosive paint is particularly suitable for a high-humidity environment and an underwater environment.

The invention relates to the technical field of ink, and discloses a preparation method of bio-based degradable water-based ink, which comprises the following steps: carrying out esterification polymerization on vanillin-based spiro acetal diglycidyl ether and diacid to obtain bio-based polyester resin, mixing and dispersing the bio-based polyester resin, petroleum-based resin, pigment, auxiliary agent and the like to obtain the bio-based degradable water-based ink. The bio-based degradable water-based ink is prepared. The bio-based resin contains a plurality of hydrophilic hydroxyl groups, has good solubility and dispersibility in the water-based ink, and generates denser hydrogen bonds and other cross-linking effects with the acrylic resin, so that the hardness of the ink is improved. Meanwhile, the polar hydroxyl groups also greatly enhance the hydrogen bond bonding and anchoring effect between the paint film and the base material, so that the adhesive force is improved. In addition, easily-hydrolyzed spiral acetal bonds, polyester structural units and other degradable chemical bonds in molecular chains of the bio-based resin provide more attack sites for water and microorganisms, the degradation rate is increased, and the degradable function is achieved.

The invention discloses an antibacterial bamboo joint pull rope material for tampons and a preparation method of the antibacterial bamboo joint pull rope material. Modified bentonite is introduced into an acrylic acid-acrylamide polymer, and a layered structure of the bentonite endows the antibacterial bamboo joint pull rope material with certain water absorption and water retention capacities; meanwhile, amino groups on the modified bentonite are chemically combined with carboxyl groups in the acrylic acid-acrylamide polymer, so that the modified bentonite is not easy to lose; according to the preparation method, firstly, water-absorbing fibers are soaked in a carboxymethyl chitosan solution, the surfaces of the water-absorbing fibers are coated with carboxymethyl chitosan, the carboxymethyl chitosan has excellent water-retaining and antibacterial properties, an antibacterial water-retaining layer is formed on the surfaces of the water-absorbing fibers, and then under the action of a cross-linking agent ethylene glycol diglycidyl ether, the antibacterial water-retaining layer is formed on the surfaces of the water-absorbing fibers. Hydroxyl groups and amino groups in the carboxymethyl chitosan and carboxyl groups and amino groups on the water-absorbing fibers are subjected to a cross-linking effect, so that the bonding strength and the cross-linking density between the carboxymethyl chitosan and the water-absorbing fibers are improved, liquid seepage is effectively prevented, and the water retention performance of the fiber material is further improved.

The invention provides a composite diaphragm, a preparation method thereof and a lithium ion battery. The composite diaphragm comprises a base diaphragm and a solid electrolyte-water-soluble gel electrolyte composite coating, wherein the surface of the base diaphragm is coated with the solid electrolyte-water-soluble gel electrolyte composite coating by utilizing a roller coating process; the water-soluble gel electrolyte is obtained by co-polymerizing an intermediate I prepared from methyl methacrylate and N-isopropylacrylamide and neopentyl glycol diglycidyl ether. In the composite diaphragm provided by the invention, the water-soluble gel electrolyte can effectively improve the adhesion of the solid electrolyte on the base membrane, and ensure that the solid electrolyte can be effectively adhered to the surface of the base membrane; lithium titanium aluminum phosphate and the like can effectively promote transmission of lithium ions through the solid electrolyte, the hexagonal boron nitride composite coating can prevent direct contact between the lithium titanium aluminum phosphate solid electrolyte and the like and lithium, and the solid electrolyte is protected. And the interface stability of the composite diaphragm is relatively good, and a compact phase formed in the circulation process can effectively inhibit the permeation of lithium dendrites, so that the safety of the battery is improved.

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

The invention provides a modified polyether amine waterborne epoxy curing agent as well as a preparation method and application thereof, and belongs to the technical field of waterborne epoxy coatings. The preparation method comprises the following steps: mixing polyether amine, bisphenol A epoxy resin and polyether alcohol diglycidyl ether, and carrying out addition-chain extension reaction to obtain an addition product; mixing the addition product with a monoepoxy compound, and carrying out an end-capping reaction to obtain an end-capped product; and mixing the end-capped product with water, and dispersing to obtain the modified polyether amine waterborne epoxy curing agent. Compared with a nonionic water-based epoxy curing agent obtained by modifying aliphatic polyamine, the modified polyether amine water-based epoxy curing agent prepared by the preparation method disclosed by the invention can greatly improve the weather resistance of a water-based epoxy coating, and also can improve the mechanical and physical properties of the epoxy coating, especially the mechanical strength and toughness.

The invention relates to the technical field of adhesives, and provides a wet state maintaining type vegetable protein adhesive as well as a preparation method and application thereof. The hyperbranched catechol polymer adhesive filler disclosed by the invention is prepared by carrying out ring-opening reaction on epoxy groups of neopentyl glycol diglycidyl ether and pentaerythritol tetraglycidyl ether and amino groups of dopamine hydrochloride. Meanwhile, the vegetable protein adhesive is prepared from vegetable protein, a cross-linking agent and the adhesive filler according to a certain proportion. According to the adhesive filler and the corresponding vegetable protein adhesive, the defect that in the prior art, a bio-based adhesive, especially a vegetable protein adhesive, is poor in product performance due to poor moisture retention can be overcome.

The invention belongs to the technical field of polymer environment-friendly materials, and particularly relates to a PHA composite antibacterial material for food and tableware and a preparation method of the PHA composite antibacterial material. The composite material is prepared from the following components in parts by weight: 60 to 70 parts of PHA (Polyhydroxyalkanoate) base material, 20 to 24 parts of PLA (Polylactic Acid) base material, 3 to 4 parts of oligomeric D-lactic acid, 2 to 2.5 parts of ZnO-coated CNC (Computer Numerical Control) antibacterial particles, 4.5 to 5.5 parts of needle-like wollastonite powder, 3.5 to 5 parts of silane modified montmorillonite, 0.05 to 0.1 part of talcum powder, 0.3 to 0.4 part of rosemary extract, 0.6 to 0.9 part of chain extender, 0.4 to 0.5 part of D-sorbitol diglycidyl ether, 0.35 to 0.45 part of glyceryl monostearate and 0.3 to 0.4 part of antioxidant. The PHA base material is used for constructing a bearing framework, and the mechanical strength, the heat-resistant stability, the oil resistance and the long-acting antibacterial property are organically unified by combining the synergistic effect of multiple materials.

The invention relates to hot baking type selective ink and a preparation method thereof. The hot baking type selective ink comprises the following components in parts by mass: 10-20 parts of acrylic resin, 10-20 parts of fluorine-containing polyacrylate, 20-40 parts of an active monomer, 3-10 parts of a photoinitiator, 5-20 parts of modified boron nitride and 1-10 parts of an auxiliary agent, wherein the modified boron nitride is obtained by reacting boron nitride with a silane coupling agent and polypropylene glycol diglycidyl ether. The fluorine-containing polyacrylate is obtained by reacting fluorine-containing acrylate, acrylate and maleic anhydride. According to the invention, not only are the film-forming property and the stability of the ink improved, but also the corrosion resistance, the strength and other properties are enhanced, the protective effect can be more effectively exerted, the stable operation of the PCB is ensured, the problems in the prior art are solved, the requirements of the industry on multiple properties of products are met, and the application prospect is good.

The invention relates to a preparation method of an epoxy and DCP bi-crosslinked EAA and LDPE cable material, and belongs to the technical field of preparation of high-voltage direct-current cable materials. The preparation method of the cable material comprises the following steps: taking an ethylene acrylic acid copolymer EAA and low-density polyethylene LDPE as matrix resin, taking a biphenyl type micromolecular epoxy compound 4, 4 '-biphenol diglycidyl ether and dicumyl peroxide DCP as double crosslinking agents, and carrying out cross-linking reaction to prepare the cable material. And heating and pressurizing in a press vulcanizer to obtain the biphenyl micromolecular epoxy and DCP bi-crosslinked EAA / LDPE high-voltage direct-current cable material. A bi-crosslinking structure formed by biphenyl type micromolecule epoxy and DCP bi-crosslinking EAA / LDPE material and an in-situ introduced voltage stabilizing segment effectively improve the direct current resistance of the cable material. The high-voltage direct-current cable material prepared by the method is simple in preparation process and low in cost, and has excellent mechanical properties and electrical properties.

The invention relates to the technical field of epoxy resin, in particular to self-repairing epoxy resin and a preparation method thereof. The self-repairing epoxy resin is prepared from the following raw materials in parts by mass: 80 to 120 parts of bisphenol A type epoxy resin, 20 to 40 parts of bisphenol F type epoxy resin, 5 to 15 parts of 1, 6-hexanediol diglycidyl ether, 1 to 3 parts of 3, 5-dimethylphenylboronic acid, 1 to 5 parts of furyl maleimide, 10 to 20 parts of dodecanedioic acid, 5 to 15 parts of butanetetracarboxylic acid, 1 to 3 parts of catalyst, 10 to 15 parts of nano silicon dioxide, 1 to 2 parts of boron nitride nanosheet and 1 to 2 parts of hyperbranched polyamidoamine. The curing agent is prepared from the following components in parts by weight: 20-30 parts of epoxy resin, 1-2 parts of sulfydryl-terminated polysiloxane, 20-30 parts of amine curing agent, 5-15 parts of reinforcing filler and 0.5 According to the invention, the balance among self-repairing capability, mechanical property and heat resistance is successfully realized; in the microcrack propagation process, fracture and recombination mechanisms of dynamic covalent bonds effectively prevent further propagation of cracks.

The invention relates to an ultra-low VOC baking type quick-drying coating and a preparation method thereof, and belongs to the technical field of coatings. The coating is prepared from the following components: composite hybrid resin, methylated melamine formaldehyde resin, neopentyl glycol diglycidyl ether, trimethylolpropane triacrylate, composite filler, zinc fatty acid, fumed silica, a silane coupling agent KH-560, aminoethyl aminopropyl polydimethylsiloxane and the like. The composite hybrid resin is prepared by adopting a special method; the composite hybrid resin is matched with methylated melamine formaldehyde resin, neopentyl glycol diglycidyl ether, trimethylolpropane triacrylate, a composite filler, zinc fatty acid, fumed silica, a silane coupling agent KH-560, aminoethyl aminopropyl polydimethylsiloxane and other components according to a certain proportion for use, and has the advantages of low VOC emission, quick drying during baking, high heat resistance, high heat resistance, high heat resistance, high heat resistance, high heat resistance, high heat resistance and the like. Meanwhile, the adhesive force is good, the hardness and the flexibility are balanced, and the chemical resistance is excellent.

The invention relates to the technical field of coatings, in particular to an inorganic nano-composite coating material applied to corrosion prevention of a splash zone and a preparation method of the inorganic nano-composite coating material. The inorganic nano composite coating material applied to corrosion prevention of the splash zone comprises a component A and a component B. The preparation method comprises the following steps: step 1, reacting dodecafluoroheptyl methacrylate, vinyl dimethyl phosphate and liquid epoxy resin to obtain modified liquid epoxy resin; 2, after the modified liquid epoxy resin reacts with carboxyl-terminated liquid nitrile rubber, polypropylene glycol diglycidyl ether is added, and a component A is obtained; the aliphatic polyamine reacts with oleic acid to obtain a curing agent, and the amino-modified nano silicon dioxide is mixed with the curing agent to obtain a component B; the prepared coating material is high in adhesive force, high in hydrophobicity, good in impact resistance and good in corrosion resistance.

The invention provides biomass daidzein-based high-performance light-cured solder resist ink and a preparation method thereof, and the preparation method comprises the following steps: carrying out ring-opening polymerization reaction modification on daidzein diglycidyl ether and acrylic acid, and finally carrying out esterification reaction with unsaturated anhydride to obtain biomass daidzein-based alkali-soluble light-cured resin. According to the technical scheme, daidzein derivative daidzein with liquid crystal characteristics is adopted as a main body structure, then daidzein diglycidyl ether is synthesized through epichlorohydrin, and then the alkali-soluble light-cured resin is synthesized and prepared through grafting acrylic acid and unsaturated anhydride. And a cured film formed by curing the high-performance light-cured solder resist ink formed by compounding the high-performance light-cured solder resist ink with daidzein diglycidyl ether has the advantages and characteristics of high heat resistance and high toughness.

The invention discloses a high-performance modified resin material and a preparation method thereof, and belongs to the technical field of resin composite material preparation. The high-performance modified resin material is prepared from a main agent, a curing agent and nano filler, the main agent is prepared from 70 to 100 parts of bisphenol epoxy resin, 20 to 40 parts of dopamine modified epoxy resin, 5 to 15 parts of diglycidyl ether, 3 to 15 parts of flame retardant, 0.3 to 1 part of anti-settling agent, 0.05 to 0.3 part of defoaming agent and 0.1 to 0.5 part of pigment; the curing agent is prepared from the following components in parts by weight: 15-35 parts of a rapid curing agent, 10-30 parts of a toughening curing agent, 5-15 parts of a dopamine modified amine curing agent, 0.5-3 parts of an accelerant and 0.1-0.5 part of an antioxidant; and the nano filler is nano-particle coated PDA (potato dextrose agar). Amino of dopamine reacts with epoxy group, catechol is oxidized to generate a quinoneform structure, thiol-epoxy click reaction is catalyzed, and the material can be rapidly cured at low temperature; a flexible chain (-S-CH-CH-) of polymercaptan and a polyether chain of amine-terminated polyether are synergistically toughened, so that the toughness and impact resistance of the material can be improved.

The invention provides a nylon modified material as well as a preparation method and application thereof, and relates to the technical field of nylon compositing, the nylon modified material comprises the following components: nylon 66, low-viscosity nylon 6, a toughening agent, a compatilizer and a flow crystallization accelerant; wherein the toughening agent comprises a block copolymer containing a polyethylene glycol chain segment and a polydimethylsiloxane chain segment; the compatilizer comprises a compound containing a diglycidyl ether group. According to the nylon modified material provided by the invention, under the condition that the modulus of nylon 66 is slightly reduced, the impact strength is improved, so that the nylon modified material has the characteristics of high flowability, high toughness, self-lubrication and the like, and can meet the requirements of occasions such as automobile parts and industrial production.

The invention belongs to the technical field of display, and particularly relates to a diffusion plate printed with quantum dots and a preparation method and application of the diffusion plate. A quantum dot precursor is dissolved in water and then mixed with dispersing agents polyvinyl alcohol and n-caprylic alcohol, the mixture is added into an ink matrix, and the ink matrix is formed by mixing bisphenol A type diglycidyl ether and alicyclic epoxy resin. Printing the ink on the surface of a substrate, and performing heat treatment after UV irradiation to obtain the diffusion plate printed with the quantum dots. According to the diffusion plate for printing the quantum dots, the high temperature of a traditional quantum dot diffusion plate during melt extrusion preparation is avoided, so that the quantum dots are prevented from losing efficacy due to the high temperature, and meanwhile, the quantum dots on the prepared diffusion plate can be good in dispersity and stability due to the adoption of the quantum dot precursor ink system.

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

The invention discloses a corrosion-resistant and fracture-resistant steel structural part and a machining process thereof, and relates to the technical field of metal materials. The anti-corrosion coating is prepared from the following components: 35-55 parts of epoxy resin, 15-25 parts of organic silicon resin, 4-12 parts of modified mica, 5-15 parts of diglycidyl ether, 3-8 parts of a polyamide resin curing agent, 2-4 parts of a silane coupling agent, 1-3 parts of cellulose acetate butyrate and 0.5-3 parts of dimethyl silicone oil; according to the corrosion-resistant and fracture-resistant steel structural part, through the synergistic effect of steel component design and the anti-corrosion coating, the excellent comprehensive performance is achieved, the anti-corrosion coating forms a compact and high-adhesive-force protection layer on the surface of the steel, and through the double effects of physical barriers and chemical protection, the corrosion resistance and fracture resistance of the steel structural part are improved. And the corrosion resistance and the service life of the steel structural member in a harsh service environment are remarkably improved.

The invention relates to the field of aerogel composite materials, in particular to a high-temperature-resistant aerogel calcium silicate composite material and a preparation method thereof, and solves the problems that the mechanical property of aerogel is reduced and the service life is shortened due to the fact that the interface bonding force between an existing aerogel phase and a reinforced phase is easily limited by the material and influenced by modified substances. The preparation method comprises the following steps: firstly, dispersing calcium salt in an aqueous solution of ethanol to form a calcium salt solvent, sequentially adding polymethylacrylic acid and 1, 4-butanediol diglycidyl ether to form a calcium salt gel precursor, placing activated fibers in a polyphenol chitosan solution for reaction, placing reinforced fibers in a molybdenum disulfide turbid solution for ultrasonic dispersion, and drying to obtain the composite material. Then carrying out hydrothermal reaction, immersing the composite fibers into a calcium salt gel precursor for negative pressure vacuum adsorption, and drying to form the high-temperature-resistant aerogel calcium silicate composite material. The interface bonding capacity and the heat resistance of the composite material can be enhanced, and the mechanical property and the heat insulation property of the material at high temperature are remarkably enhanced.

The present invention provides an epoxy resin adhesive and a preparation method thereof, and relates to the technical field of building structure adhesives, the epoxy resin adhesive is prepared from a component A and a component B, the component A comprises the following raw materials by weight: 90-110 parts of epoxy resin, 15-25 parts of a toughening agent, 40-50 parts of a filler I and 15-20 parts of benzyl alcohol, and the toughening agent comprises polycarbonate, polyamide and polypropylene glycol diglycidyl ether; the component B is prepared from the following raw materials in parts by weight: 40 to 60 parts of curing agent, 10 to 20 parts of filler II, 1.5 to 3 parts of polyvinylpyrrolidone and 5 to 10 parts of benzyl alcohol. The preparation method comprises the following steps: S1, preparing A glue; s2, preparing B glue; and S3, mixing glue. The toughening agent is added in the component A, polycarbonate, polyamide and polypropylene glycol diglycidyl ether are selected as the toughening agent, the three raw materials are compounded and cooperated, the processability and flowing property of the epoxy resin adhesive can be effectively improved, and the problems that a cured finished product is high in brittleness and poor in impact resistance are solved.

The invention belongs to the technical field of temporary plugging agents, and relates to a medium-temperature drilling fluid nano temporary plugging agent and a preparation method thereof. The temporary plugging agent is prepared from the following raw materials in parts by mass: 10 to 15 parts of small-particle-size coated silicon dioxide, 15 to 20 parts of medium-particle-size coated silicon dioxide, 30 to 50 parts of large-particle-size coated silicon dioxide, 15 to 20 parts of fiber, 5 to 8 parts of polyether diglycidyl ether, 5 to 8 parts of hyperbranched polyethyleneimine, 1 to 1.5 parts of water-soluble cellulose and 0.5 to 1 part of cationic quaternary ammonium salt. The coated silicon dioxide takes chitosan and glutaraldehyde as wall raw materials and silicon dioxide as a core material, and the particle size of the small-particle-size core material is 0.3-1 mu m; the particle size of the medium-particle-size particle core material is 150-250 microns; the particle size of the large-particle-size particle core material is 250-350 microns, the coated silicon dioxide particles are bonded together through a microscopic interpenetrating network formed by the reaction of hyperbranched polyethyleneimine and polyether diglycidyl ether, and the particles are matched with fibers to improve the bearing strength.

The invention discloses a hyperbranched polyether branching agent with an adjustable structure and a preparation method and application thereof.According to the branching agent, 3-butene-1-alcohol serves as an initiator, a hyperbranched skeleton is constructed through anion ring-opening polymerization reaction and diglycidyl ether, then esterification and end capping are conducted through anhydride, and the hyperbranched polyether branching agent with the adjustable structure is obtained. The tail end of the hyperbranched polyether contains vinyl double bonds, and the ester group structure of the hyperbranched polyether can be regulated and controlled. Different diepoxy compounds are selected to control a main chain structure, and different anhydrides are used for regulating and controlling the chemical composition of branched chains, so that accurate design of molecular weight, polarity and number of functional groups of the branching agent is realized. The branching agent has excellent dissolvability in common organic solvents, and solves the problem of poor dissolvability of the traditional polydiene branching agent. When the star-shaped branched butyl rubber is applied to the synthesis of star-shaped branched butyl rubber, the distribution and number of branched points can be accurately regulated and controlled, the weight-average molecular weight and molecular weight distribution index of the rubber are remarkably improved, and the side reaction of gel is avoided.

The invention relates to a water-based epoxy downstream face odorless waterproof coating as well as a preparation method and application thereof, and belongs to the technical field of water-based coatings. The water-based epoxy downstream face odorless waterproof coating comprises a component A and a component B, the component A comprises a waterborne epoxy curing agent, a dispersing agent, a defoaming agent, a thickening agent, wear-resistant powder, a pigment and filler mixture, water, an anti-settling auxiliary agent, a wetting leveling agent, a scratch-resistant auxiliary agent and a sterilizing agent; the component B comprises a waterborne epoxy emulsion, a silane coupling agent and a toughening agent; the water-based epoxy curing agent is a modified amine curing agent and comprises epoxy resin E51, polyethylene glycol diglycidyl ether, aliphatic polyamine, a reactive emulsifier, an end-capping reagent and propylene glycol monomethyl ether, the water-based epoxy downstream face odorless waterproof coating is different from a conventional waterproof coating, is specially designed for a humid environment and can be coated and cured on a humid surface, and the water-based epoxy downstream face odorless waterproof coating has the advantages that the coating is environmentally friendly, and the service life of the coating is prolonged. Construction is convenient, real waterproofness of the downstream face is achieved, odor removal and environmental protection are achieved, and the antibacterial and mildew-proof characteristics are achieved.

The invention relates to a synthetic method of 1, 4-butanediol diglycidyl ether, 1, 4-butanediol and epichlorohydrin are synthesized in one step under the action of a phase transfer catalyst, in the one-step process, once 1, 4-butanediol and epichlorohydrin are subjected to ring-opening reaction to produce a chlorohydrin ether intermediate, the chlorohydrin ether intermediate is subjected to ring-opening reaction, and the chlorohydrin ether intermediate is subjected to ring-opening reaction to produce the 1, 4-butanediol diglycidyl ether. The intermediate can be subjected to ring-closure production immediately under the action of solid alkali to produce an epoxy group, the obtained 1, 4-butanediol diglycidyl ether is relatively low in easily saponifiable chlorine content, and the target product is relatively high in purity. After the reaction is finished, sodium chloride generated by the reaction and unreacted solid caustic soda can be removed through direct suction filtration to obtain a neutral system, washing is not needed, no waste liquid is generated, operation is easy, and the method is suitable for clean industrial production.

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