485 results about "Glyceryl Ethers" 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 discloses a hydrophilic polyacrylate / epoxy silica sol composite coating and a preparation method thereof. The composite coating is prepared from a polyacrylate epoxy silica sol solution containing carboxyl and a polyethylene glycol side chain through blending, coating, drying and heating crosslinking. The polyacrylate is synthesized by taking methyl methacrylate, methacrylic acid, hydroxyethyl methylacrylate and allyl polyethylene glycol as comonomers through a solution free radical copolymerization method, and the epoxy silica sol solution is prepared by taking tetraethoxysilane and gamma-glycidoxypropyltrimethoxysilane as raw materials through a solution polymerization method. The composite material is prepared through a sol-gel and core-shell preparation process. The preparation method comprises the following steps: carrying out solution blending on polyacrylate and epoxy silica sol, and carrying out coating, drying and other processes to generate the cross-linked polyacrylate / epoxy silica sol composite coating through a cross-linking reaction between carboxyl and epoxy. The prepared composite coating has the characteristics of long durability, wear resistance, hydrophilicity, antifogging, protein adsorption resistance and the like.

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 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 discloses a corrosion-resistant polypropylene edge band material and a preparation method thereof, and belongs to the technical field of preparation of edge band materials. The corrosion-resistant polypropylene edge sealing strip material is prepared from, by weight, 50-75 parts of polypropylene, 2-5 parts of an antioxidant, 3-6 parts of a corrosion-resistant agent, 2-4 parts of a composite flame retardant, 8-15 parts of calcium carbonate and 2-4 parts of dye, the corrosion-resistant agent is prepared from 2, 6-dichlorobenzonitrile, 1, 2, 4-triazole, a sulfuric acid solution, sodium nitrite and parachloroaniline, and the corrosion-resistant agent is prepared from 2, 6-dichlorobenzonitrile, 1, 2, 4-triazole, a sulfuric acid solution, sodium nitrite and parachloroaniline. The composite flame retardant is prepared from 3-glycidyl ether oxypropyl trimethoxy silane, diphenyl silanediol, barium hydroxide and boric acid. The edge band material prepared by the method has excellent corrosion resistance, flame retardance, heat resistance and mechanical properties.

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 provides light-cured epoxy ink and a preparation method and application thereof, the light-cured epoxy ink comprises an alicyclic epoxy monomer, an oxetane monomer, a diluent, a photoinitiator, an adhesion promoter and an assistant, the alicyclic epoxy monomer is an alicyclic epoxy monomer containing more than two polycyclic rings in a molecule; and the adhesion promoter is glycidyl ether epoxy micromolecules containing hydroxyl groups. According to the epoxy ink composition disclosed by the invention, the rigid group alicyclic ring and the adhesion promoter with hydroxyl are introduced, so that the epoxy ink composition has high adhesion and film surface hardness at the same time. The light-cured printing ink provided by the invention has low viscosity and high light transmittance. The liquid crystal composition is suitable for the field of display panels such as OLEDs, Micro-LEDs and the like, and the ink-jet printing technology is met.

The invention belongs to the technical field of biology, and discloses a halohydrin dehalogenase mutant, a coding gene, a recombinant vector, a recombinant strain, an enzyme preparation and application of the halohydrin dehalogenase mutant, the coding gene, the recombinant vector, the recombinant strain and the enzyme preparation in synthesis of chiral (S)-5-phenoxymethyl-2-oxazolidinone compounds. The halohydrin dehalogenase mutant is obtained by performing combined mutation on an enzyme with an amino acid sequence as shown in SEQ ID NO.1 at the 15th site, the 137th site and the 179th site. The mutant can obviously improve the ee value of a chiral (S)-5-phenoxymethyl-2-oxazolidinone compound synthesized by catalyzing phenyl glycidyl ether, the purity of catalytic synthesis and resolution is higher, and industrial production is facilitated.

An organic silicon resin toughening agent, a single-component high-strength epoxy structural adhesive, and preparation methods for both. The organic silicon resin toughening agent is prepared by reacting epoxy modified hydrogen-containing silicone oil and vinyl six-membered cyclic oligomeric silsesquioxane; and the epoxy modified hydrogen-containing silicone oil is prepared by reacting allyl alcohol glycidyl ether and hydrogen-containing silicone oil which contains hydrogen at both ends. Compared with toughening agents such as nitrile rubber and core-shell structured rubber, the synthesized organic silicon resin toughening agent having a cyclic mesh structure unit in the present invention has better high and low temperature resistance, and can significantly improve the high and low temperature resistance of the single-component high-strength epoxy structural adhesive while improving the toughness of the single-component high-strength epoxy structural adhesive.

The invention discloses a low-shrinkage creep-resistant plastic-wood product and a preparation method thereof, and belongs to the technical field of plastic-wood composite materials. The composite material is prepared from the following raw materials in parts by weight: 10 to 18 parts of polypropylene, 22 to 35 parts of high-density polyethylene, 58 to 83 parts of eucalyptus / walnut shell / montmorillonite composite modified powder, 10 to 15 parts of hydroxyl-terminated polybutadiene and graphene / ZnO2 / CaO, 7 to 15 parts of basic magnesium sulfate whisker, 3 to 4.6 parts of gamma-glycidyl ether oxypropyl trimethoxy silane and 0.3 to 1 part of antioxidant. In this way, the plastic-wood product is high in low-temperature impact strength, good in creep resistance, small in linear thermal expansion coefficient and high in thermal deformation temperature. Specifically, the impact strength of the plastic-wood product is 6.96-7.27 KJ / m < 2 >; the tensile creep modulus is 18.8 to 21.6 Mpa; the linear thermal expansion coefficient is 2.5-3.1 * 10 <-5 > / DEG C; the thermal deformation temperature is 163.2 to 178.5 DEG C;

The invention discloses a high-temperature-resistant and weather-resistant epoxy resin adhesive and a preparation method thereof, and belongs to the field of epoxy resin adhesives, the adhesive can keep stable bonding strength for a long time at high temperature through the synergistic effect of hydrogenated bisphenol F type epoxy resin, silicon-containing phenyl glycidyl ether epoxy resin and a dicyandiamide-imidazole composite curing agent, and the adhesive has high temperature resistance and weather resistance. According to the present invention, the graphene aerogel is added to the silicon-containing phenyl glycidyl ether epoxy resin to meet the high temperature environment use requirement, and the silica bond in the silicon-containing phenyl glycidyl ether epoxy resin and the aging resistance of the graphene aerogel enable the adhesive to have characteristics of excellent ultraviolet aging resistance, excellent thermal cycling resistance and excellent moisture resistance, solve the performance defects of the traditional product, and be suitable for the application in the high temperature and severe environment, the method has an important practical value.

The invention provides a cationic antistatic agent containing hydroxyl and ether bonds and a preparation method thereof, and belongs to the technical field of cationic antistatic agents. The preparation method comprises the following steps: carrying out neutralization reaction on amine substances and acid in a solvent to obtain an intermediate product; and reacting the intermediate product with glycidyl ether under the action of a catalyst to obtain the cationic antistatic agent. According to the prepared cationic antistatic agent, hydroxyl and ether bonds are introduced into the molecular structure, the hygroscopicity of the antistatic agent can be remarkably improved due to the existence of the hydroxyl, a conductive water film is formed, and therefore the conductivity and the antistatic performance of the surface of a material are enhanced; ether bonds can be combined with water molecules in air through hydrogen bonds to form a conductive channel, so that the antistatic effect is further improved. The antistatic agent prepared by the invention not only has excellent antistatic property, but also shows good smoothness, softness, water cleaning property, washing resistance and compatibility, and is suitable for various application scenes needing antistatic treatment.

The invention provides an ultraviolet curing coating, a strippable coating and a preparation method of the ultraviolet curing coating and the strippable coating, and belongs to the technical field of coatings. The ultraviolet curing coating provided by the invention is prepared from the following components in parts by weight: 50 to 60 parts of light-cured resin oligomer, 15 to 25 parts of reactive diluent, 2 to 5 parts of glycidyl methacrylate, 5 to 8 parts of photoinitiator, 1 to 3 parts of glycidyl ether oxypropyl cyclotetrasiloxane, 1 to 3 parts of ultraviolet absorbent, 3 to 5 parts of filler and 1 to 3 parts of aluminum chelate. According to the invention, glycidyl methacrylate is added, so that more uniform photocuring can be promoted, and the comprehensive performance of a photocuring coating is improved; according to the invention, glycidyl ether oxypropyl cyclotetrasiloxane is added, so that a light-cured coating has excellent salt mist resistance, weather resistance and impact resistance; by adding the aluminum chelate, the peelability of the photocuring coating can be improved.

A wear-resistant super-hydrophobic composite material and a preparation method therefor are disclosed. The wear-resistant super-hydrophobic composite material includes a substrate and a wear-resistant super-hydrophobic composite material coating layer on the surface of the substrate; the wear-resistant super-hydrophobic composite material coating layer is obtained by curing a precursor for the super-hydrophobic composite material coating layer; the precursor for the super-hydrophobic composite material coating layer includes a gel and an ACNTB-SiO2-coupling agent layer on the surface of the gel; the gel includes an epoxy resin and amino-terminated hyperbranched polysiloxane, or includes an epoxy resin, amino-terminated hyperbranched polysiloxane and an additive; and the additive is an ACNTB-SiO2-coupling agent and / or diglycidyl-ether-terminated polydimethylsiloxane. The wear-resistant super-hydrophobic composite material has a water contact angle higher than 160° and more than 250 rubbing cycles.

The invention relates to the technical field of agricultural fertilizers, in particular to an organic-inorganic composite silicon-calcium-magnesium fertilizer and a preparation method and application of the organic-inorganic composite silicon-calcium-magnesium fertilizer. The high-temperature activated silicon-calcium-magnesium mineral powder is composed of calcined wollastonite powder, calcined serpentine powder, dolomite powder and zeolite powder; 2%-5% of an organosilane modifier, wherein the organosilane modifier is composed of gamma-aminopropyl triethoxy silane and gamma-glycidyl ether oxypropyl trimethoxy silane, and the organic silane modifier is composed of gamma-aminopropyl triethoxy silane and gamma-glycidyl ether oxypropyl trimethoxy silane; 18%-35% of a functional organic matter complex, wherein the functional organic matter complex is composed of mineral source sodium humate, bioactive small peptide, sodium alginate and polyglutamic acid; and 3%-8% of auxiliary functional components, so that the solubility and the bioavailability of silicon, calcium and magnesium elements in minerals are remarkably improved.

The invention provides a tackifying filtrate reducer, a preparation method thereof and a drilling fluid, and belongs to the technical field of synthesis of treating agents for oil field drilling fluids. The preparation method comprises the following steps: dissolving raw materials N-vinyl pyrrolidone, 2-acrylamide-2-methylpropanesulfonic acid and allyl glyceryl ether in water according to a mass ratio of (1-3): (5-7): (1-4) to prepare an aqueous solution, adjusting the pH value of the aqueous solution, adding a cross-linking agent and an initiator, and carrying out cross-linking copolymerization to obtain the tackifying filtrate reducer. The tackifying filtrate reducer for the drilling fluid can resist the temperature of 200 DEG C, has good tackifying, shearing force improving and filter loss reducing effects, can be widely applied to a high-temperature solid-free drilling fluid system and other various water-based drilling fluid systems, and has a wide application prospect.

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 the technical field of fabrics, and discloses a cool antistatic comfortable fabric and a preparation method thereof.The cool antistatic comfortable fabric is obtained by reacting pentanebis (glycine), 1, 3-bis (3-glycidyl ether oxypropyl) tetramethyldisiloxane, epoxy chloropropane and the like to obtain an epoxy quaternization finishing agent and finishing a cotton fabric. The epoxy quaternization finishing agent contains a flexible siloxane structure, can improve the softness and wrinkle resistance of the cotton fabric, contains quaternary ammonium salt and carboxyl hydrophilic groups, enables the cotton fabric to keep good hydrophilicity and cool hand feeling, contains quaternary ammonium salt cations, can increase the conductivity of the surface of the cotton fabric, and improves the anti-wrinkle performance of the cotton fabric. The surface resistivity is reduced, so that the anti-static performance is improved, and the cotton fabric still keeps good soft anti-wrinkle performance and anti-static performance after being washed for multiple times.

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 relates to a marine epoxy resin composite material. The marine epoxy resin composite material is characterized by comprising the following components in parts by mass: 100 parts of epoxy resin, 20-30 parts of a curing agent, 100-120 parts of a reinforcing material, 2050 parts of hollow microsphere filler and 5-15 parts of a flame retardant, the epoxy resin is one or a mixture of two of bisphenol A type epoxy resin, bisphenol F type epoxy resin, polyphenol type glycidyl ether epoxy resin or aliphatic glycidyl ether epoxy resin. When in use, the marine epoxy resin composite material disclosed by the invention has the advantages of excellent comprehensive performance, corrosion resistance, flame retardance, water resistance, high strength, light weight and the like, still has excellent performance retention rate after being soaked in water for several days, and is more suitable for complex and severe working conditions on a ship.

The invention provides modified polysiloxane and also provides a preparation method of the modified polysiloxane, and the preparation method comprises the following steps: mixing low-hydrogen-content silicone oil with allyl alcohol polyether and allyl glycidyl ether, heating, adding a catalyst, and carrying out an addition reaction to obtain the modified polysiloxane. The invention also provides an application of the modified polysiloxane as a soil loosening agent, and the modified polysiloxane is used for reducing the soil bulk density and / or increasing the soil porosity, and is also used for improving the water absorption and / or water retention of the soil. By applying the modified polysiloxane soil loosening agent disclosed by the invention, the soil bulk density is effectively reduced, the soil compactness is reduced, and the soil porosity is improved, so that the soil hardening is remarkably improved, the crop growth is promoted, and the modified polysiloxane soil loosening agent is green and safe and has important economic value and environmental significance.

The invention discloses a DA bond polymer with antibacterial and self-repairing functions for a wood surface as well as a preparation method and a use method of the DA bond polymer. Chitosan serves as a wall material, cinnamon essential oil serves as a core material, the cinnamon essential oil and chitosan antibacterial microcapsules are prepared through emulsification, crosslinking and spray drying, and essential oil controlled release is achieved. Then bisphenol A diglycidyl ether DGEBA and furfuryl alcohol FA are used as raw materials, furyl functional epoxy resin FER is prepared under the catalysis of triethylamine TEA, bismaleimide BMI is added, and a DA bond self-repairing polymer is prepared through a DA reaction; and adding 4, 4-diaminodiphenylmethane DDM into the system, reacting with redundant DGEBA to generate a cross-linked polymer network, and adding the microcapsules into a DA bond semi-interpenetrating self-repairing network solution to obtain the DA bond polymer. A thin film formed by brushing and curing wood has antibacterial and self-repairing functions, scratches and microcracks on the surface of the wood can be repaired, and microbial erosion is inhibited.

The invention relates to the field of fiber composite materials, in particular to a combined composite material cylindrical shell and a preparation method thereof. The cylindrical shell comprises a plurality of composite material splicing blocks, and each composite material splicing block is prepared from the following raw materials in parts by weight: 40 to 60 parts of glass fiber and 30 to 50 parts of modified epoxy resin; the modified epoxy resin is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 15 to 20 parts of carboxy nitrile rubber, 5 to 10 parts of bisphenol A glycidyl ether, 5 to 10 parts of polyether amine, 0.3 to 0.5 part of antioxidant, 5 to 8 parts of preservative, 60 to 80 parts of curing agent, 0.5 to 1.5 parts of accelerant and 5 to 8 parts of nano filler. The mechanical property, the corrosion resistance, the aging resistance and the axial bearing capacity of the cylindrical shell are remarkably improved. The preparation method disclosed by the invention has the characteristics of high efficiency and continuity, and is suitable for large-scale production.

A photoelectric composite cable for an underwater buoy, and a preparation process therefor. A polyurethane, a self-repairing polyurethane prepolymer, and a composite nano zinc oxide are selected as an outer sheath base material. A modified polysiloxane having a B-O six-membered ring dynamic cross-linked network and a long-chain alkane group and an amino is introduced into the self-repairing polyurethane prepolymer; 5,5'-methylenedisalicylaldehyde and isophorone diisocyanate are together subjected to stepwise polymerization with the modified polysiloxane, and the 5,5'-methylenedisalicylaldehyde is cross-linked with diphenylmethane diisocyanate to obtain a self-repairing polyurethane prepolymer; and nano zinc oxide is subjected to a modification treatment, wherein dodecyltrimethoxysilane and 3-glycidoxypropyltrimethoxysilane are used for dual modification, such that super-hydrophobic nano zinc oxide having good thermal stability and high dispersity is prepared in a toluene system.

The invention discloses a single-component high-heat-resistance type epoxy adhesive and a preparation method of the single-component high-heat-resistance type epoxy adhesive. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of N, N-4, 4 '-diphenylmethane bismaleimide; 50 parts of bisphenol F epoxy resin; 36.47 parts of 4, 4 '-diaminodiphenyl sulfone; 20 to 40 phr of phenyl glycidyl ether; 1 to 2 phr of two terminal type epoxy silicone oil; 4 to 6 phr of hydroxyl-terminated polyether sulfone; 10 to 20 phr of boron nitride, the surface of which is modified by gamma-glycidyl ether oxypropyl trimethoxy silane; and 1 to 3 phr of an adhesion promoter. According to the adhesive disclosed by the invention, the heat resistance, the mechanical property, the dimensional stability, the process adaptability and the like are synergistically improved, the use requirements of an aviation structural part on long-term service at 150-180 DEG C and an electronic packaging device on the condition of short-time reflow soldering at about 200 DEG C can be met, and the reliability of the adhesive in a high-temperature environment is remarkably improved.

The invention belongs to the technical field of ultra-thin glass, and particularly relates to a folding screen protector and a preparation process thereof. The folding screen protector sequentially comprises a functional base film layer, a thermosetting resin film layer, a UTG layer, a thermosetting resin film layer and an OCA adhesive film layer from top to bottom. A layer of photocureable coating added with modified silicon dioxide and methallyl polyhedral oligomeric silsesquioxane is sprayed on PET resin to serve as a functional base film, and a rigid phenyl group is introduced into a molecular structure of a thermosetting resin film; according to the invention, methyltrimethoxysilane, phenyltrimethoxysilane and 3-glycidyl ether oxypropyl trimethoxysilane are adopted as monomers for co-polymerization to obtain high-transparency polysiloxane as an OCA adhesive, so that the bending performance and the impact resistance of the folding screen protector are effectively improved.

The invention discloses a plugging agent for oil-based drilling fluid, and relates to the technical field of plugging agents. The plugging agent comprises a rigid material, pre-gelatinized cassava starch, inorganic fibers, gel particles and base oil, and preparation raw materials of the gel particles comprise allyl glycidyl ether, alkyl primary amine, short-chain acrylate, long-chain acrylate, styrene and unsaturated silane. According to the blocking agent for the oil-based drilling fluid, by arranging the rigid material, the pre-gelatinized cassava starch, the inorganic fibers and the gel particles, microcracks of a shale reservoir can be effectively blocked, and the blocking effect is good.

The invention discloses a weather-resistant ABS (Acrylonitrile Butadiene Styrene) alloy and a preparation method thereof, the weather-resistant ABS alloy comprises the following raw material components in parts by weight: 20-22 parts by mass of ABS, 60-66 parts by mass of modified polycarbonate, 4-6 parts by mass of modified carbon nanotubes, 0.2-0.4 part by mass of an antioxidant and 0.5-1.5 parts by mass of an acidic lubricant; the modified polycarbonate is obtained by carrying out copolymerization on 2-(3, 4-epoxy cyclohexyl) ethyl methyl dimethoxy silane, octa-epoxy cyclohexyl ethyl cage-shaped polysilsesquioxane, gamma-glycidyl ether oxypropyl methyl diethoxy silane and carbon dioxide, and the modified polycarbonate is obtained by carrying out copolymerization on the 2-(3, 4-epoxy cyclohexyl) ethyl methyl dimethoxy silane, the octa-epoxy cyclohexyl ethyl cage-shaped polysilsesquioxane, the gamma-glycidyl ether oxypropyl methyl diethoxy silane and the carbon dioxide; the modified carbon nanotubes are obtained by modifying carbon nanotubes with isopropyl dioleate oxy (dioctyl phosphate acyloxy titanate), isopropyl tri (dioctyl pyrophosphate acyloxy) titanate and tetrabutyl titanate, so that the agglomeration problem of the carbon nanotubes can be effectively improved, and the carbon nanotubes are uniformly dispersed in the weather-resistant ABS alloy; therefore, the mechanical property of the weather-resistant ABS alloy is ensured, and the strength and toughness of the weather-resistant ABS alloy are effectively improved.

The invention discloses a peracetylated polysaccharide derivative mixing accelerator as well as a preparation method and application thereof, and relates to the technical field of polysaccharide derivatives. Alkyl polyglucoside and glycidyl ether are subjected to etherification reaction to obtain polysaccharide derivatives; and adding acetic anhydride and an organic weak base catalyst into the polysaccharide derivative, and carrying out esterification reaction to obtain the peracetylated polysaccharide derivative. The obtained peracetylated polysaccharide derivative can be used for reducing the minimum miscible pressure of CO2 in an offshore oilfield. The polysaccharide derivative provided by the invention is simple in synthesis process, and the molecular activity of the polysaccharide derivative can be regulated and controlled by changing the number of carbon dioxide-philic groups and the length of oleophylic unsaturated hydrocarbon chains, so that the polysaccharide derivative can be used in the CO2 oil displacement process of oilfield exploitation, and the minimum miscible pressure in the CO2 oil displacement process is effectively reduced.

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.