761 results about "Bisphenol A" patented technology

The invention relates to the technical field of PC transparent flame-retardant toughening modification, in particular to phenolic hydroxyl-terminated modified polysiloxane with a side chain containing phenyl and sulfonate groups and a preparation method of copolymerized PC. The modified polysiloxane is prepared by the following steps: performing ring opening polymerization on phenol-containing double end sockets and cyclotetrasiloxane to obtain modified polysiloxane containing double bonds and phenyl functional groups, and grafting sulfonate through a thiol-ene click chemical reaction. Diphenyl carbonate, bisphenol A and the modified polysiloxane are used as raw materials, a polysiloxane-PC block copolymer is formed through copolymerization, efficient flame retardance and high transparency are achieved, and meanwhile extremely high low-temperature impact strength is achieved.

The invention discloses an impregnation liquid for preparing hydrogenated bisphenol A through bisphenol A hydrogenation. The impregnation liquid comprises a Ru complex, a water-soluble nonionic surfactant and water, wherein the molecular size of the Ru complex is greater than 1nm. According to the preparation method disclosed by the invention, by adopting the impregnation liquid containing the Ru complex of which the molecular size is greater than 1nm and the water-soluble nonionic surfactant, more Ru complex of which the molecular size is greater than 1nm can exist in mesoporous channels of an activated carbon carrier in an impregnation process, so that the contact probability of an active phase and a reactant bisphenol A molecule is increased; the purposes of improving the active metal utilization rate and improving the catalyst activity are achieved.

The invention discloses a high-temperature-stripping-resistant epoxy structural adhesive as well as a preparation method and application thereof, and belongs to the technical field of high-performance composite materials. The epoxy structural adhesive comprises bisphenol A type epoxy resin, novolac epoxy resin, polysiloxane-polyurethane modified epoxy resin, core-shell modified epoxy resin, PEEK ultrafine powder and other components, and through mutual cooperation of all the components, the problems that in a high-temperature service environment, the adhesive layer modulus of traditional adhesive is rapidly attenuated, and a bonding interface is prone to failure are solved; the epoxy structural adhesive provided by the invention has both rapid curing and heat resistance, is stable in interface bonding, has the highest modulus of 1.28 GPa at 80 DEG C, the highest peel strength of 7.8 N / mm at 80 DEG C, and a damage mode of cohesion or high-proportion mixed damage, and is especially suitable for structural bonding requirements of harsh scenes such as peripheral structures of automobile engines, high-temperature areas of electronic equipment and the like.

The invention relates to the technical field of high polymer materials, and discloses a preparation method of high-dielectric-constant epoxy resin. The method comprises the following steps: (1) carrying out copolymerization reaction on bisphenol A epoxy resin and polytetrafluoroethylene at 80-100 DEG C for 2-3 hours; (2) adding a dicyandiamide curing agent into the reaction product obtained in the step (1), and carrying out gradient heating for curing; and (3) adding surface-modified barium titanate nanoparticles into the product obtained in the step (2), performing ultrasonic treatment, performing casting molding, and performing annealing treatment. According to the method, through molecular level design, the dielectric constant is remarkably improved while the excellent mechanical property of the epoxy resin is maintained, the dielectric loss (tan delta) and the thermal stability are optimized, and a high-performance base material is provided for electronic devices.

The invention belongs to the technical field of composite processing aids, and particularly relates to a processing aid for a tensile CPVC (chlorinated polyvinyl chloride) board and a preparation process thereof, and the preparation process comprises the following steps: dispersing glass fibers in a KH-550 hydrolysate for stirring reaction, dispersing in a bisphenol A epoxy resin solution for stirring reaction after washing and drying, dispersing in an ODI (Olefin Diisocyanate) solution for stirring reaction after washing and drying, and drying to obtain the tensile CPVC board. After washing, dispersing in a GMA solution for stirring reaction, and washing and drying to obtain modified glass fibers; and dispersing the modified glass fiber in the dispersion liquid, adding an initiator and BA, heating, stirring for reaction, adding an initiator and MMA, stirring for reaction, washing and drying to obtain the processing aid. When a CPVC plate prepared by blending the processing aid and CPVC is used in a high-temperature and high-humidity environment, high tensile strength and impact strength can be kept for a long time.

The invention relates to a high-solid-content epoxy glass flake heavy anti-corrosion coating for an offshore wind power foundation, which consists of a component A and a component B, the component A is prepared from raw materials in percentage by weight as follows: 10%-20% of bisphenol A epoxy resin, 20%-40% of modified hydrogenated epoxy resin, 5%-10% of liquid petroleum resin, 1%-2% of a rheological aid, 0.1%-1% of a dispersant, 0.1%-1% of a defoaming agent, 1%-3% of a silane coupling agent, 5%-10% of modified glass flakes, 20%-40% of functional filler and 0-10% of a composite environment-friendly solvent; and the component B is a mixed amine epoxy curing agent. The epoxy glass flake coating disclosed by the invention can be thickly coated at one time, has excellent adhesive force, hardness, wear resistance and impact resistance, is high in drying speed, excellent in chemical corrosion resistance, seawater soaking resistance and cathodic disbonding resistance, and meets the performance requirements of NORSOK M-501: 2022 (edition VII) Surface Treatment and Protective Coating.

The application discloses a method for inhibiting the migration of toxic small molecules in plastics based on a protein-based phase transition composite coating, which is characterized by the following steps: inducing the rapid phase transition of proteins on the surface of plastics by a disulfide bond reducing agent to form a nanofilm, and adsorbing polysaccharides on the surface of the nanofilm to form a protein-based phase transition composite coating on the surface of the plastics, which can inhibit the migration of toxic small molecules in the plastics. The preparation method of the protein-based phase transition composite coating is simple, the cost is low, the inhibition effect on the migration of phthalate plasticizers and bisphenol A in plastics (such as PVC, PP, PE, PS and PET) is good, the adsorption of drugs on the surface of medical plastics can be prevented at the same time, the protein-based phase transition composite coating has good biocompatibility, is suitable for temperature-sensitive plastics, has universality, can be safely used on the surface of food and medical plastic products, and has a good popularization and application prospect on the surface of plastics.

The invention relates to a 1D / 2D dual-heterojunction catalyst, a preparation method thereof and application of the 1D / 2D dual-heterojunction catalyst in photo-assisted periodate activated degradation of bisphenol A. The preparation method comprises the following steps: mixing a concentrated hydrochloric acid solution with LiF, adding Ti3AlC2, carrying out a heating reaction, carrying out solid-liquid separation to obtain a solid phase, washing the solid phase to be neutral, and dispersing the solid phase in ethanol to obtain an MXene ethanol solution; adding a cerium source aqueous solution into an MXene ethanol solution, mixing, and placing in liquid nitrogen to obtain a mixed solution; mixing an organic ligand, ethanol and pure water to obtain a mixed solution, carrying out a mixed heating reaction on the mixed solution and the mixed solution, carrying out solid-liquid separation to obtain a precipitate, and freeze-drying to obtain powder; and heating and calcining the obtained powder in an inert atmosphere to obtain the 1D / 2D dual-heterojunction catalyst. According to the invention, photogenerated electron-hole recombination is effectively inhibited by constructing double heterojunctions, and ultrafast electron transfer is realized at the same time, so that the oxidation effect is enhanced, and the efficient photocatalytic activity of '1 + 1gt, 2' is realized.

The invention relates to the technical field of adhesives, and particularly discloses an adhesive for repairing a glass fiber reinforced plastic pipeline and a preparation process. The invention relates to an adhesive for repairing a glass fiber reinforced plastic pipeline. The adhesive is prepared from the following raw materials: modified bisphenol A epoxy resin, a curing agent, a glass fiber reinforced filler, a silane coupling agent, phenyl glycidyl ether, hydroxyl-terminated nitrile rubber and an antioxidant 1076, the modified bisphenol A type epoxy resin is prepared by grafting and modifying bisphenol A type epoxy resin through amino-terminated polyether; the glass fiber reinforced filler is prepared from hydroxylated glass fibers and a graphene-carbon nanotube compound through covalent grafting. The adhesive can be used for emergency repair of glass fiber reinforced plastic pipelines, has the advantages of high low-temperature curing speed, high bonding strength and good durability, can effectively avoid cracking and leakage of repaired parts, and is adaptive to low-temperature and high-pressure complex repair working conditions. The preparation process is simple and convenient to operate and high in controllability, the adhesive with uniform performance can be stably prepared, and the repair efficiency and repair quality are guaranteed.

The invention relates to the technical field of polymer composite materials, in particular to a cable polymer composite material for a wind turbine blade, which is prepared from the following raw materials in parts by weight: a polymer base material; a reinforcing material; a polymer modified material; a functional additive; a performance modifier; the functional additive is prepared from an anti-ultraviolet agent, an antioxidant, a silane coupling agent and nano titanium dioxide. According to the invention, the epoxy modified polyether-ether-ketone and bisphenol A epoxy resin compounded base material is matched with a continuous glass fiber, carbon fiber chopped strand and nano silicon nitride multi-element reinforcing system, so that the core short board of insufficient mechanical properties of the traditional material is thoroughly solved, and a magnesium hydroxide, aluminum hydroxide, expanded graphite and nano montmorillonite compounded flame-retardant system is also selected, so that the flame-retardant performance of the material is greatly improved. The flame-retardant cable material is high in flame retardance, free of toxic gas release, capable of meeting the environment-friendly requirement, capable of improving the material interface bonding force and long-term service reliability and capable of meeting the requirement for the service life of 20 years or above of wind power blade cables.

The invention relates to the technical field of epoxy resin materials, and discloses an epoxy resin material based on two-dimensional aromatic polyamide and a preparation method thereof.The preparation method comprises the specific preparation steps that firstly, melamine reacts with 1, 3, 5-trimesoyl chloride, washing, centrifuging and drying are performed to obtain two-dimensional aromatic polyamide, and the two-dimensional aromatic polyamide is ground into nano powder; secondly, adding the nano powder according to 0.5% of the mass of the amine curing agent, and performing ultrasonic dispersion to form a homogeneous-phase enhanced curing agent; and finally, blending the bisphenol A resin E51, the perfluorooctanoyl chloride modified melamine and the amine curing agent containing the two-dimensional aromatic polyamide to obtain the epoxy resin material. The two-dimensional aromatic polyamide epoxy resin material disclosed by the invention has relatively good mechanical property and waterproof property.

The invention relates to the technical field of alloy surface treatment, and particularly discloses a treating agent for zinc-aluminum-magnesium alloy surface corrosion prevention and a preparation method thereof.The treating agent for zinc-aluminum-magnesium alloy surface corrosion prevention is composed of a treating agent body component and a treating agent curing component, wherein the treating agent main body component comprises the following raw materials: bisphenol A epoxy resin, antioxidant toughening cellulose, a composite solvent, a flatting agent and a defoaming agent; the curing component of the treating agent comprises the following raw materials: a tackifying curing compound and a composite solvent; when acting on the surface of the zinc-aluminum-magnesium alloy, the treating agent prepared through the method has excellent adhesive force, toughness, oxidation resistance and anti-corrosion effect, the zinc-aluminum-magnesium alloy can be effectively protected, and the service life of the zinc-aluminum-magnesium alloy is long.

The invention provides a high-flexibility tear-resistant epoxy structural adhesive as well as a preparation method and application thereof. The epoxy structural adhesive is prepared by mixing a component A and a component B, on the basis of the total weight of the component A, the component A comprises the following components in percentage by weight: 34-70% of modified epoxy resin, 5-30% of bisphenol A type epoxy resin, 2-6% of benzyl alcohol, 8-15% of an epoxy reactive diluent, 0.2-1.5% of a defoaming agent, 1-5% of a thixotropic agent, 5-40% of filler and 1-4% of epoxy color paste; on the basis of the total weight of the component B, the component B comprises the following components in percentage by weight: 55-75% of polyether amine, 5-15% of bisphenol A epoxy resin, 5-10% of benzyl alcohol and 10-20% of dodecylphenol. The mixing mass ratio of the component A to the component B is (3.7-7): 1. The modified epoxy resin and the bisphenol A epoxy resin are compounded, and an optimized curing system is combined, so that the flexibility and the tear resistance of the structural adhesive are remarkably improved while the high strength of the epoxy resin is maintained, and the structural adhesive is suitable for structural bonding in the fields of buildings, automobiles, electronics and the like.

This application provides a glass fiber surface treatment agent, its preparation method, glass fiber, fabric, and their applications. The glass fiber surface treatment agent comprises an effective component and water, with a solid content of 5.8–10.5%. The effective component, by weight percentage, includes: a coupling agent of 7.3–17.3%, a penetrant of 0.3–2.8%, a lubricant of 7.7–13.2%, a film-forming agent of 58.3–81.9%, a toughening agent of 0.4–1.8%, and additives of 2.4–6.6%. The film-forming agent comprises film-forming agent A and film-forming agent B. Film-forming agent A is a composition of phenolic epoxy emulsion and bisphenol A type epoxy emulsion, and film-forming agent B is an alicyclic epoxy resin emulsion. Glass fibers produced using this glass fiber surface treatment agent exhibit excellent bundle properties, wear resistance, and weaving performance. The glass fiber fabric undergoes rapid and complete static impregnation in epoxy resin, resulting in high mechanical strength and meeting the performance requirements of new energy vehicle battery casings.

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 invention relates to the technical field of coatings, in particular to an epoxy resin-based water-based corrosion-resistant and weather-resistant coating and a preparation method of the epoxy resin-based water-based corrosion-resistant and weather-resistant coating. A composite modified inorganic filler composed of siloxane modified epoxy resin, modified polysiloxane, rare earth cerium modified graphene, silane modified calcium carbonate oligomer and surfactant-silane composite modified kaolin is compounded; a composite modifier consisting of propylene glycol diacetate, dipropylene glycol butyl ether and diethylene glycol butyl ether and an isopropanol / water mixed solvent are matched, so that the contradiction between the water resistance and the structural stability of the existing water-based paint is effectively solved, and the anticorrosion durability, the weather resistance, the mechanical strength, the adhesive force and the storage stability of the coating are remarkably improved; good water-based dispersity and construction applicability are kept, and the coating can be suitable for long-acting corrosion protection of base materials such as metal components, industrial equipment and building outer walls and has a wide application prospect.

The invention relates to the technical field of coatings, in particular to a preparation method of an efficient anti-corrosion material for a flexible support. The component A is prepared from the following materials in parts by weight: 30 to 50 parts of organic silicon epoxy resin, 10 to 20 parts of bisphenol A epoxy resin, 5 to 15 parts of polyvinyl butyral, 5 to 15 parts of zinc phosphate, 5 to 20 parts of hollow ceramic powder, 20 to 30 parts of mixed solvent, 5 to 10 parts of modified powder, 3 to 5 parts of additive, 1 to 3 parts of wetting agent and 0.5 to 1.5 parts of flatting agent. According to the invention, a composite structure is formed by tubular halloysite and rectorite in the modified powder, and a flexible chain segment formed by reaction of a polyurea prepolymer and esterified xylitol in the additive endows the coating with excellent elasticity, so that stress generated by dynamic deformation can be uniformly dispersed, microcrack growth is inhibited, and the wear resistance of the coating is improved. And the anti-corrosion material can keep the structural integrity when bearing the dynamic deformation of the flexible bracket, so that the flexibility of the material is improved.

The application discloses a novel flexible printed circuit board and camera module prepared based on weldable low-temperature silver paste, and belongs to the technical field of electronic materials and devices. The conductor pattern in the flexible printed circuit board comprises a main circuit pattern and an auxiliary function structure formed by weldable low-temperature cured silver paste. The curing temperature of the weldable low-temperature silver paste is 87-103 DEG C. The silver paste comprises conductive fillers, a polymer resin system, ester solvents, a curing agent, a silane coupling agent, polyamide wax thixotropic agents, polysiloxane defoaming agents, modified carbon nanotubes, modified antimony tin oxide powder, modified ceramic fillers and low-stress modifiers. The polymer resin system comprises hydrogenated bisphenol A type epoxy resin, diphenyl type epoxy resin and polyacrylate-CTBN copolymer. The conductive fillers comprise silver-coated copper flaky powder, nano silver wire and low-temperature alloy powder. Through the synergistic effect of components and the innovative process, the comprehensive improvement of mechanical properties, conductive properties, high-frequency characteristics and welding reliability is realized under the premise of ultralow-temperature curing.

The invention provides an epoxy resin adhesive for RGB-LED (Red Green Blue-Light Emitting Diode) packaging and a preparation method of the epoxy resin adhesive. The epoxy resin adhesive is prepared from the following raw materials in parts by mass: 40 to 50 parts of bisphenol A epoxy resin, 20 to 30 parts of epoxy modified phenyl organic silicon resin, 10 to 15 parts of sulfur-containing epoxy resin, 4 to 6 parts of modified branched aluminum oxide, 10 to 14 parts of modified hexagonal boron nitride, 30 to 40 parts of compound curing agent, 1 to 2 parts of compound accelerant and 0.5 to 1 part of modified nano zinc oxide ultraviolet absorbent. The epoxy resin adhesive for packaging the RGB-LED, provided by the invention, has relatively high bonding stability on a PPA (Phenyl-Phenylic Acid) base material, has a slight shrinkage degree in a curing process, can effectively avoid the structural failure problems of packaging body cracking, chip offset and the like, guarantees the structural stability of the RGB-LED in long-term operation, and improves the service life of the RGB-LED. And moreover, high reliability, high weather resistance, matte high-brightness balance and low hygroscopicity are realized.

The invention discloses a bending-resistant high-modulus cover film and a preparation method thereof, and particularly relates to the technical field of cover films, the bending-resistant high-modulus cover film comprises an adhesive film and release paper, the adhesive film comprises a film base material and an adhesive-containing bonding layer arranged on the lower surface of the film base material; the release paper is pressed on the bonding layer; wherein the adhesive is prepared from the following components in percentage by mass: 5 to 20 percent of bisphenol A type epoxy resin, 30 to 50 percent of polyvinyl butyral resin, 10 to 20 percent of organic silicon modified epoxy resin, 6 to 10 percent of modified nano silicon dioxide, 10 to 30 percent of flame retardant and 3.1 to 6.5 percent of additive. The covering film has higher glass transition temperature (Tg) and high bending resistance, can maintain the stability of the material, and reduces the plastic deformation caused by repeated bending; the invention also provides a preparation method of the high-modulus cover film.

The invention relates to the technical field of resin composite materials, in particular to a preparation method of a high-strength epoxy resin composite material for unmanned aerial vehicle structural parts, and the high-strength epoxy resin composite material comprises the following raw materials in parts by weight: 100-120 parts of bisphenol A epoxy resin, 80-90 parts of a curing agent, 1-1.5 parts of an accelerant, 20-25 parts of a composite additive, 3-8 parts of a silane coupling agent and 0.1-0.5 part of an antioxidant. According to the invention, mechanical support is provided through high strength and high modulus characteristics of boron nitride whiskers in the composite additive, surface impurities are removed through pretreatment, surface performance is optimized, the binding force between the boron nitride whiskers and resin is enhanced, cracks are deflected by the whiskers under external force, an expansion path is increased to consume energy, and meanwhile, zinc powder is coated by a complex of tannic acid and iron in the powder, so that the zinc powder is more stable in performance. Phenolic hydroxyl groups and epoxy resin form hydrogen bonds, interface bonding force is enhanced, local stress is dispersed, microcrack propagation is inhibited, and fracture toughness is improved.

The application discloses a preparation method and application of a photo-fuel cell (PFC) based on degradation of bisphenol A and reduction of carbon dioxide, wherein the photo-fuel cell comprises a photo-anode and a biological cathode, the photo-anode is a TiO2@CdS / ITO electrode, and the biological cathode is an FDH / DA / PANi / CC electrode.The photo-fuel cell can not only effectively degrade BPA, but also has a degradation rate of 100%; the constructed FDH / DA / PANi / CC biological cathode can efficiently reduce CO2 into formic acid, and the yield is 3.7μmol·h ‑1 -1 . Compared with other photo-fuel cells, the degradation rate of BPA and the yield of formic acid are obviously improved; in addition, the constructed photo-fuel cell can also effectively generate electricity, and the maximum current density and power density are 271μA cm ‑2 -2 and 67.2μW cm ‑2 -2 respectively.

The invention discloses an anti-scraping thin coating type powder coating plate and a preparation method thereof, and relates to the technical field of coating materials and metal surface treatment. According to the scheme, the method comprises the following steps: forming a film on the surface of a degreased, alkali-washed and passivated metal substrate by adopting an interface modification liquid containing a silane coupling agent KH-590; and performing melt extrusion on a powder coating prepared from a hydroxyl-terminated polyether-ether-ketone / bisphenol A type epoxy silane grafted composite resin matrix, a triglycidyl isocyanurate / caprolactam composite curing agent and a titanate modified nano composite filler, and then performing electrostatic spraying and curing to obtain a coated plate with a dry film thickness of 20-40 [mu] m, wherein the powder coating is prepared from the hydroxyl-terminated polyether-ether-ketone / bisphenol A type epoxy silane grafted composite resin matrix, the triglycidyl isocyanurate / caprolactam composite curing agent and the titanate modified nano composite filler. The invention has the following beneficial effects: the interface modification layer and the silicon-containing grafted resin cooperate to improve the interface bonding force, boiling resistance and salt spray resistance; the multi-scale hard filler constructs a reinforced skeleton in the film, so that the scratch resistance is improved while the mechanical property is maintained, and thin coating and powder saving are realized under the condition of ensuring the decoration and durability.

The invention provides a nickel-manganese oxide composite material, a preparation method and application, and belongs to the technical field of environmental functional materials and water pollution control, and the preparation method comprises the following steps: adding terephthalic acid, nickel nitrate hexahydrate and manganese chloride tetrahydrate into N, N-dimethylformamide, stirring and mixing, dropwise adding a NaOH solution, transferring into a high-pressure reaction kettle, carrying out a hydrothermal reaction, filtering, washing, and drying to obtain the nickel-manganese oxide composite material. After the reaction is completed, centrifugally washing a mixture in the inner container of the high-pressure reaction kettle, and drying in vacuum to obtain a NiMn-MOF material; and placing the NiMn-MOF in a porcelain boat, calcining, and naturally cooling to room temperature to obtain the nickel manganese oxide composite material. The nickel manganese oxide material prepared by the method shows excellent catalytic activation performance on persulfate, and can realize efficient and rapid degradation of bisphenol A.

The invention discloses a preparation method of a luminescent material for an epoxy negative photoresist, and belongs to the technical field of photoresists. The preparation method comprises the following steps: mixing Yb / Er / Tm doped rare earth chloride with oleic acid, 1-octadecene and oleylamine, dehydrating to form a homogeneous complex, injecting NaOH and NH4F solutions, and synthesizing an up-conversion nano core dispersion liquid at high temperature; heating the gold nanoparticles, adding HAuCl4, sodium citrate and PEI, and performing in-situ reduction to form a gold nanoparticle modification layer; successively adding GPTMS, APTES, PTMS, deionized water and ammonia water, and carrying out a hydrothermal reaction to prepare a functionalized siloxane shell layer; adding dopamine hydrochloride, and performing oxidative polymerization in a Tris buffer solution to form a polydopamine layer; adding thiolated polyethylene glycol to passivate, and centrifugally drying to obtain a nano luminescent material; and adding bisphenol A epoxy resin and other photoresist systems, and carrying out high-speed shearing and ultrasonic dispersion to obtain the uniform luminous composition. According to the method, plasmon enhancement and surface collaborative optimization are realized, the luminous intensity, heat and moisture resistance, resolution and adhesive force are improved, and the method is suitable for a high-performance photoetching process.

The invention relates to the technical field of coatings, and discloses a waterproof composite coating for a non-stick pan and a preparation method of the waterproof composite coating, the composite coating sequentially comprises a transition bonding layer, a waterproof blocking layer and a surface non-stick layer from inside to outside, and each layer is prepared from raw materials in a specific proportion. The transition bonding layer takes titanium carbide, potassium feldspar and the like as main raw materials, the waterproof blocking layer comprises bisphenol A epoxy resin, modified tea polyphenol and the like, and the surface non-stick layer takes polytetrafluoroethylene as a core. The preparation method sequentially comprises the steps of substrate pretreatment, transition bonding layer preparation, waterproof barrier layer preparation and surface non-sticky layer preparation, and the process is simple and controllable. The composite coating has excellent waterproof performance, firm binding force with a base body and good non-stick performance, the service life of the non-stick pan can be effectively prolonged, health risks caused by coating damage are reduced, and the composite coating is suitable for large-scale production.

This invention discloses a high-modulus, high-toughness bismaleimide resin composition, a carbon fiber prepreg, and a preparation method thereof, belonging to the field of composite material technology. The bismaleimide resin composition of this invention comprises the following raw materials in parts by weight: 40-80 parts bismaleimide resin, 10-20 parts o-diallyl bisphenol A, and 5-10 parts a powder toughening agent containing phenolphthalein side chains. The carbon fiber prepreg of this invention is made from the above resin composition and carbon fibers, with thermoplastic polyimide felt interlayered to form an integrated structure. This allows the composite material prepared from the carbon fiber prepreg to maintain high modulus and high temperature resistance while significantly improving its toughness, impact damage tolerance, and interlayer delamination resistance. Furthermore, the prepreg of this invention has good processability and is suitable for manufacturing high-performance complex components.

The invention relates to the technical field of high-performance polymer materials, in particular to low-dielectric and high-temperature-resistant modified cyanate ester resin and a preparation method thereof. Advantages and characteristics of bisphenol A type cyanate ester monomers and bisphenol M type cyanate ester monomers are combined, and the dielectric property and the thermal stability are remarkably improved. Diallyl bisphenol A is introduced as a network structure modifier, the phenolic hydroxyl group of the diallyl bisphenol A adjusts the curing reaction rate, and the allyl and bisphenol A structures of the diallyl bisphenol A finely regulate and control the rigid-flexible balance of a cross-linked network through chemical copolymerization, so that the curing process is controllable and the final network structure is optimized. Meanwhile, a toughening system is innovatively designed, epoxy-terminated liquid nitrile rubber is adopted for toughening, stable micron-scale rubber particles are formed in a resin matrix in a chemical bonding mode, and the fracture toughness is improved. The modified resin has excellent dielectric properties, high heat resistance and a wide process window, and meets the strict requirements of a new generation of low observability aircrafts on a bearing-stealth integrated composite material matrix.

The application discloses a preparation method of a lithium ion battery adhesive and the product. The preparation method of the adhesive comprises the following steps: first, taking a bisphenol A type diether dianhydride and a functional group-containing diamine into a polar aprotic solvent to perform a polycondensation reaction, adding a condensation activator into the obtained polyamide acid solution, and uniformly blending to obtain the adhesive; wherein the functional group-containing diamine is composed of 50-80 mol% of amide diamine monomers and the balance of 2-(4-aminophenyl)-5-aminobenzimidazole in terms of molar percentage, the amide diamine monomers are 4,4'-diaminobenzanilide and / or N,N'-bis(4-aminophenyl)terephthalamide; and the activator is one or a combination of two or more selected from N,N'-carbonyldiimidazole, N,N'-thiocarbonyldiimidazole and diimidazolylbenzene. The adhesive is applied to a lithium battery positive / negative slurry to further manufacture a battery, and the battery has good battery characteristics.