226 results about "Polyamide-imide" patented technology

The invention belongs to the technical field of high-temperature-resistant coatings, and particularly relates to a core-shell polyimide-based high-temperature-resistant water-based coating and a preparation method thereof. Comprising the following components in percentage by mass: 35-38% of a core-shell emulsion; the core layer is polyimide resin; the transition layer is an organic silicon emulsion modified by 5, 6-dimethyl benzimidazole and a silane coupling agent KH-550; the shell layer is made of polyamide-imide resin; 28%-32% of a modified high-temperature filler; 6%-7.5% of a functional auxiliary agent; and the balance of deionized water. Through core-shell emulsion gradient design, multi-scale filler cooperation and a low-temperature gradient curing process, the high temperature resistance, the adhesive force and the environmental protection property of the coating are improved.

The invention discloses an insulated wire, a coil and electronic / electrical equipment, and relates to the technical field of insulated wires. The modified polyamide-imide insulating layer is composed of an insulating material obtained by reacting diisocyanate with mixed anhydride, wherein the mixed anhydride comprises short-chain anhydride and long-chain anhydride. According to the insulated wire coated with the polyamide-imide insulating layer, the wire flexibility is improved, the insulated wire is suitable for closer arrangement of complex groove types, and then the motor groove fullness rate is improved, so that the size of a stator iron core is reduced under the same power, the motor weight is indirectly reduced, and the requirement for light weight is met.

The invention discloses a preparation method of an insulated wire. Specifically, the method comprises the following steps: annealing a rolled conductor to obtain an annealed conductor; the periphery of the annealed conductor is coated with insulating paint to form a first prefabricated core wire, the first prefabricated core wire coated with the insulating paint is subjected to high-temperature curing to form an insulating layer, and a second prefabricated core wire is obtained; the outer side of the insulating layer of the second prefabricated core wire is coated with finish paint containing a modified polyamide-imide intermediate to form a third prefabricated core wire, the third prefabricated core wire coated with the finish paint is subjected to high-temperature curing to form a finish paint layer on the outer side of the insulating layer, and the insulated wire is further obtained. The insulated wire provided by the invention improves the wire flexibility, adapts to closer arrangement of complex slot types, and further improves the slot fullness rate of a motor, thereby reducing the size of a stator core under the same power, indirectly reducing the weight of the motor and meeting the requirement of light weight.

The invention discloses a high-speed winding polyester-imine enameled wire and a manufacturing method thereof. The high-speed winding polyester-imine enameled wire comprises a conductor, a polyurethane-imine resin layer, a polyester-imine insulating layer and a self-lubricating functional layer which are sequentially arranged from inside to outside, and the self-lubricating functional layer is formed by compounding modified polyamide-imide resin and a solid lubricant. The modified graphene and the polytetrafluoroethylene are introduced and compounded with the modified polyamide-imide resin, so that the dynamic friction coefficient of the enameled wire can be reduced synergistically, the dynamic friction coefficient is less than or equal to 0.12, the polyamide-imide resin is modified, the graphene is modified, and the nano titanium dioxide is modified; according to the present invention, the compatibility and the interface bonding force between the modified polyamide-imide resin and the solid lubricant can be easily improved, the mechanical strength and the wear resistance of the coating can be improved, the friction heat can be effectively dispersed by using the high thermal conductivity of the graphene, and the direct friction contact area can be easily reduced by designing the micron-sized corrugated structure.

The invention discloses a high-temperature-resistant benzimidazolone polyamide imide battery binder as well as a preparation method and application thereof, and belongs to the technical field of battery materials. The high-temperature-resistant benzimidazolone polyamideimide battery binder with uniformly distributed amide segments and imide segments is prepared through a method for activating aromatic diamine on one side of trimethylchlorosilane and changing the activity of amino groups on the two sides, the comprehensive performance of the high-temperature-resistant benzimidazolone polyamideimide battery binder is excellent, the defects that a traditional binder is poor in heat resistance and insufficient in chemical stability are overcome, and the service life of the high-temperature-resistant benzimidazolone polyamideimide battery binder is prolonged. The introduction of high-polarity groups can improve the wettability and ion transmission capability of the electrolyte, improve the solubility of the electrolyte so as to facilitate electrode forming, and can also form strong chemical bonds or physical adsorption with positive and negative inorganic active materials during application, thereby reducing the structural damage in the cycle process and improving the electrochemical performance of the battery. The lithium ion battery electrode can keep a stable structure in a high-temperature environment, the thermal runaway risk caused by high temperature is remarkably reduced, and the application requirements of the lithium ion battery in a fast charging or high-temperature energy storage scene are well met.

The invention discloses a method for manufacturing a polyamide-imide high-heat-resistance enameled wire for a new energy automobile, and the method comprises the following steps: 1), carrying out the surface treatment of a conductor, and improving the surface roughness; 2) preparing insulating paint liquid; (3) coating the insulating paint liquid obtained in the step (2) on the surface of the conductor obtained in the step (1) for multiple times; and 4) carrying out sectional stretching treatment to finally obtain the polyamide-imide high-heat-resistance enameled wire. The polyamide-imide resin, the solvent, the epoxy modifier, the nano composite powder, the silane coupling agent and the dicumyl peroxide are compounded to prepare the insulating paint liquid, and the insulating paint liquid is coated on the conductor for multiple times, so that a compact layer can be formed on the conductor, and the insulating paint liquid has the advantages of high heat resistance, high thermal stability, high mechanical property and the like; the extreme requirements of the new energy automobile driving motor on high temperature resistance, high-frequency pulse voltage resistance and refrigerant corrosion resistance of the enameled wire are met, the manufacturing steps are simple, and the enameled wire is suitable for industrial popularization and application.

The invention relates to the technical field of modified composite materials, in particular to a polyamide-imide polymer, a preparation method of the polyamide-imide polymer, a sizing agent, a fiber-reinforced special engineering composite material and a preparation method of the fiber-reinforced special engineering composite material. The polyamide-imide polymer is formed by polymerizing a first monomer and a second monomer, and the first monomer is an aryl polyanhydride monomer; the second monomer is a diamine monomer or a diisocyanate monomer. The polyamide-imide polymer is used as a sizing agent to compound the fiber material and the special engineering plastic, so that the defects of the carbon fiber in spreadability, compatibility with a resin matrix, heat resistance, interface performance and the like can be overcome and enhanced, and the matching enhancement of other inorganic fibers can be realized; the interface multifunctional modification performance optimization of the carbon fiber reinforced high-performance thermoplastic resin matrix composite material is realized.

To provide a method for producing a polyimide precursor or a polyamideimide precursor which enables formation of a film that is excellent in breaking elongation and PCT characteristics, and is suitably usable for a curable resin composition.SOLUTION: A method for producing a polyimide precursor or a polyamideimide precursor includes, in this order, a step of reacting a dicarboxylic acid compound represented by general formula (1) or (2) described in the specification with a chlorinating agent containing no sulfur element to obtain a dicarboxylic acid chloride represented by general formula (1)' or (2)' described in the specification, a step of reacting the dicarboxylic acid chloride with diamine, and a step of treating the reaction product with an ion exchange resin.SELECTED DRAWING: None

The invention discloses a battery diaphragm, a preparation method thereof and a secondary battery, and belongs to the technical field of batteries. The battery diaphragm comprises a base membrane and a heat-resistant layer stacked on the surface of at least one side of the base membrane, the heat-resistant fibers in the heat-resistant layer are selected from polyimide fibers, polyethylene glycol terephthalate fibers, polyamide-imide fibers, polyether-ether-ketone fibers, cellulose nanofibers, poly-p-phenylene terephthamide fibers, poly-m-phenylene isophthamide fibers, polyphenylene sulfide fibers and polyacrylonitrile fibers, and the heat-resistant fibers in the heat-resistant layer are selected from polyimide fibers, polyethylene glycol terephthalate fibers, polyamide-imide fibers, polyether-ether-ketone fibers, cellulose nanofibers, poly-p-phenylene terephthamide fibers, poly-m-phenylene isophthamide fibers, polyphenylene sulfide fibers and polyacrylonitrile fibers. The fiber is at least one of polyvinyl alcohol fiber and poly (p-phenylene benzobisoxazole) fiber; the thickness H1 of the heat-resistant layer and the thickness H2 of the base film satisfy 0.02 < = H2 / H1 < = 10; the porosity (X) of the base film and the porosity (Y) of the heat-resistant layer satisfy 20% < = X + Y < = 90% and 20% < = X < = 60%. The battery diaphragm can be baked at the temperature of 100 DEG C or above, and has relatively high puncture strength.

According to the surface-modified hexagonal boron nitride and polyimide composite heat-conducting film and the preparation method and application thereof, hexagonal boron nitride is subjected to surface treatment through a macromolecular modifier, and a large amount of polyamide-imide or polyimide polymer is successfully introduced to the surface of hexagonal boron nitride; furthermore, the compatibility of the surface modified hexagonal boron nitride and polyimide is effectively improved, so that the polyimide composite heat-conducting film prepared from the surface modified hexagonal boron nitride has excellent heat-conducting property and mechanical property.

The invention relates to the technical field of thermoplastic polyurethane matt films, in particular to a thermoplastic polyurethane matt film for clothes and a preparation method of the thermoplastic polyurethane matt film. The thermoplastic polyurethane matt film for clothing is prepared from the following raw materials in parts by mass: 200 to 400 parts of crystalline thermoplastic polyurethane, 100 to 700 parts of linear low-density polyethylene, 10 to 20 parts of polyamide-imide, 10 to 50 parts of nano silicon dioxide, 10 to 50 parts of basalt ore, 0.05 to 0.2 part of silane coupling agent, 10 to 20 parts of dispersing agent, 10 to 50 parts of solubilizer, 10 to 30 parts of antioxidant and 10 to 20 parts of light stabilizer. And 10-20 parts of a lubricant. According to the present invention, the good matting effect can be maintained for a long time, the high haze (gt, 70%) and the low glossiness (lt, 15%) can be achieved, the washing resistance of the matting TPU film for clothing decoration is improved by 3 times, the color retention rate is high, the material is endowed with the soft and bendable characteristics, and the complex decoration requirements can be met.

The invention relates to the technical field of high polymer materials, in particular to a blended polyimide diaphragm for a lithium battery and a preparation method of the blended polyimide diaphragm, and the preparation method comprises the following steps: S1, heating a polyimide solid and a polyamide-imide solid according to a certain mass ratio, and re-dissolving in an aprotic polar solvent to prepare blended polyimide slurry; s2, the blended polyimide slurry is subjected to filtering and vacuum defoaming and then is coated into a thin film; and S3, carrying out gradient heating and vacuum drying on the film to obtain the blended polyimide diaphragm. The mass ratio of the polyimide solid to the polyamide-imide solid is 1: (1-2), and the solid content of the blended polyimide slurry is 18%-22%. The blended polyimide film has the characteristics of high mechanical strength, good solubility and low electrolyte swelling, the preparation method is simple, and the blended polyimide film has a good application prospect in the field of lithium battery diaphragms.

A method for producing a purified resist composition includes a step of filtering a resist composition using a filter having a porous structure in which adjacent spherical cells communicate with each other. The filter is provided with a porous membrane containing at least one resin selected from the group consisting of polyimides and polyamideimides. The resist composition contains a metal compound (M) and an organic solvent component (S). The metal compound (M) contains: a metal ion of a metal atom from Group 3 to Group 16 in the long-period periodic table or a metal oxide of the metal atom; and a bonder bonded to the metal ion or the metal oxide. The content of the metal atoms contained in the metal ions or the metal oxide is 0.2-3 mass% with respect to the total mass of the resist composition.

The present application belongs to the technical field of high-temperature-resistant coatings, and particularly relates to a core-shell polyimide-based high-temperature-resistant water-based coating and a preparation method thereof. The coating comprises the following components by mass percentage: core-shell emulsion 35-38%, wherein the core layer is polyimide resin, the transition layer is organic silicon emulsion modified by 5,6-dimethylbenzimidazole and silane coupling agent KH-550, and the shell layer is polyamide-imide resin; modified high-temperature filler 28-32%; functional additive 6-7.5%; and deionized water in the rest. The present application improves the high-temperature resistance, adhesion and environmental friendliness of the coating through gradient design of the core-shell emulsion, synergistic effect of multi-scale fillers and low-temperature gradient curing process.

This invention relates to the technical fields of RFID equipment manufacturing and novel magnetic inks, providing a magnetic ink for RFID electronic tags and its preparation method. The magnetic ink comprises bisphenol A epoxy acrylate prepolymer, modified polyester resin, polyamide-imide resin, nano-scale soft magnetic ferrite powder, silver-coated flake copper powder, low-polymerization-degree polyurethane compatibilizer, γ-glycidyl etheroxypropyltriethoxysilane coupling agent, photoinitiator, antioxidant, leveling agent, and reactive diluent monomer. The ferrite powder has a D50 of 0.1-0.3µm and its surface is treated with a phosphate ester-silane double coating. After UV curing, its magnetic permeability is 20-60, and its loss tangent is ≤0.05. This invention's ink possesses excellent magnetic properties, conductivity, and flexibility, effectively improving the tag's electromagnetic response, crack resistance, and printing accuracy. It is suitable for printing high-Q value narrow-linewidth antenna patterns.

Disclosed herein are multilayer composite laminates comprising continuous fibers and a polymer matrix comprising a poly(arylene sulfide) (PAS) polymer, a polyetherimide (PEI) polymer, and a polyamide-imide (PAI) polymer.

The problem of the present application is to provide a polyamide-imide copolymer having excellent toughness such as bending resistance, excellent transparency, and good wettability when formed into a film. The solution to this problem is to provide a polyamide-imide copolymer, which comprises an imide structural unit and an amide structural unit, wherein the imide structural unit comprises: an imide structural unit I-1 represented by the following formula (1) and at least one imide structural unit I-2 selected from the group consisting of those represented by the following formulas (2) to (5), and the amide structural unit comprises: an amide structural unit A-1 represented by the following formula (6).

The invention provides a high-strength, high-temperature-resistant and flame-retardant cable sheath material. The high-strength, high-temperature-resistant and flame-retardant cable sheath material is prepared from the following raw material components in parts by weight: 40-70 parts of matrix resin, 10-30 parts of reinforced fibers, 15-30 parts of a flame retardant, 5-15 parts of an anti-ant agent, 2-8 parts of a compatibilizer, 0.5-5 parts of a processing aid and 2-4 parts of color master batch. The matrix resin comprises at least one of polyamide-imide resin, polyether-ether-ketone or polyurethane resin. The reinforced fibers comprise amino modified carbon fibers and aramid fibers, and the mass ratio of the amino modified carbon fibers to the aramid fibers is 1: (1-3). The flame retardant comprises nano magnesium hydroxide and aluminum hypophosphite, and the mass ratio of the nano magnesium hydroxide to the aluminum hypophosphite is (2: 1)-(3: 1). The invention discloses a cable protection sleeve, and aims to solve the common problems that an existing cable protection sleeve is prone to embrittlement or deformation in extreme weather such as freezing rain and high temperature, novel materials are high in manufacturing cost and difficult to be put into large-scale commercial use, and meanwhile, termites and rodents damage cables.

Provided is a coating composition which has excellent coating properties and which forms a coating film that has good water vapor resistance and corrosion resistance. A coating composition comprising an aqueous dispersion containing a water-soluble polyamideimide resin (P), a polyethersulfone resin (Q), and a fluorine-containing polymer (R) containing a non-melt-processable fluorine-containing polymer (S) and a melt-processable perfluoropolymer (T) having a melting point of 200-350 DEG C, the mass ratio of the water-soluble polyamideimide resin (P) to the polyethersulfone resin (Q) is 10 / 90 to 40 / 60.

To provide an electrode formation material that can produce an electrode for an energy device with excellent cycle characteristics.SOLUTION: An electrode formation material contains polyamide-imide and is used for forming an electrode containing an active material that includes silicon-based active material and carbon-based active material.SELECTED DRAWING: None

The embodiments aim to provide a polyamide-imide-based film, which comprises a polyamide-imide-based polymer that is free of fluorine atoms and which has a modulus of 5 GPa or more based on a film thickness of 50 μm, whereby it is excellent in optical properties, mechanical properties, and ultraviolet ray blocking rates; a process for preparing the same; and a cover window and a display device comprising the same.

The embodiment aims to provide a polyamide-imide film having excellent optical properties, mechanical properties and UV blocking rate, comprising a polyamide-imide polymer that does not contain fluorine atoms and having a modulus of 5 GPa or more based on a film thickness of 50 μm, a method for manufacturing the same, and a cover window and a display device including the same.

The invention discloses a production method of a PA / PE high-barrier composite film bag. The composite film bag comprises an outer layer, a middle layer and an inner layer, the outer layer is prepared from PA6, glass fibers, maleic anhydride grafted polyethylene, an antioxidant, a slipping agent, an ultraviolet light absorber, titanium dioxide, nano silicon dioxide and polyimide; the middle layer is prepared from EVOH (Ethylene Vinyl Alcohol), polyamide-imide, nano montmorillonite, maleic anhydride grafted polypropylene, an antioxidant, a slipping agent, terpene resin, polyvinylidene chloride and polybutylene terephthalate; the inner layer is prepared from HDPE, LLDPE, mPE, an antistatic agent, silicon dioxide, dioctyl phthalate, an antibacterial agent and polylactic acid. The composite film bag prepared by the invention not only has high barrier property and good strength, but also has various functions.

According to the present invention, a sliding bearing structure has a rotating body (24) and sliding bearings (30, 40, 60) that support the rotating body (24). More specifically, the sliding bearings (30, 40, 60) have a bearing surface (60a) formed of a coating layer (61) containing at least a polyamide-imide. The rotating body (24) has a supported surface (24g) that faces the bearing surface (60a) and is formed from a metal material. The aspect ratio Str of surface properties of the supported surface (24g) is 0.020 or more.

The utility model aims at providing a kind of integrated micro electric signal conductor's cable, realize the integration of multiple signal lines, can effectively suppress common mode interference, fully meet the use requirement under the complex electric field environment of power cable inside, realize safe, reliable and efficient signal transmission, solve the problems of many cable quantity in prior art, large space occupation and easy to be interfered with electromagnetic interference.The utility model includes cable core, the outer layer of cable core is cover layer, the cable core includes several electric power conductor and several signal conductor, the signal conductor is embedded in the gap between the electric power conductor, the outer layer of electric power conductor is crosslinked polyethylene structure, the signal conductor includes N pairs of twisted pair wire, each pair of twisted pair wire includes two twisted enameled wire, the outer layer of signal conductor is wound with polyamide imide film.The utility model is applied to the technical field of power cable.

This invention discloses a water-based boron nitride glass lubricant, its preparation method, and its application. The water-based boron nitride glass lubricant comprises: 12-36 wt% of a lubricating agent, 1-3 wt% of a dispersant, 8-24 wt% of a binder, and 47-79 wt% of water. The lubricating agent comprises a first lubricating agent and a second lubricating agent. The first lubricating agent comprises boron nitride, and the second lubricating agent comprises at least one of silicon dioxide, graphite, and molybdenum disulfide. The dispersant comprises at least one of a silane coupling agent, hexadecyltrimethylammonium chloride, hexadecyltrimethylammonium bromide, sodium dodecyl sulfate, and sodium dodecyl sulfonate. The binder comprises at least one of a water-based polyamide-imide, an inorganic phosphate, and a silicate. The lubricant of this invention has good lubrication effect, excellent friction reduction and anti-wear properties, and can be used at temperatures above 1000°C, avoiding high-temperature oxidation of the workpiece.

The invention discloses a packaging high-barrier composite film and a preparation method thereof, and relates to the field of layered materials, the packaging high-barrier composite film sequentially comprises a layer A, a layer B and a layer C; the heat-resistant layer material is prepared from the following raw materials: aluminum oxide and magnesium oxide; the preparation raw materials of the reinforcing layer material comprise a modified ethylene-vinyl alcohol copolymer and polyamide-imide; the barrier layer material is prepared from the following raw materials: a modified ethylene-vinyl alcohol copolymer, high-density polyethylene and polyether-ether-ketone resin; the heat sealing layer material is prepared from the following raw materials: chlorinated polypropylene, a modified ethylene-vinyl alcohol copolymer, polyphenylene sulfide and calcium stearate, the modified ethylene-vinyl alcohol copolymer is prepared from the following materials: an ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1, 4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1, 1-bis (trifluoromethyl)-2, 2, 3, 3, 3, 3-pentafluoropropyl 2-fluoroacrylate and acetone, and the modified ethylene-vinyl alcohol copolymer is prepared from an ethylene-vinyl alcohol copolymer, 7-chloro-6-fluoro-1-p-fluorophenyl-1, 4-dihydro-4-oxo-3-quinolinecarboxylic acid, 1, 1-bis (trifluoromethyl)-2, 2, 3, 3, 3, 3-pentafluoropropyl 2-fluoroacrylate and acetone. The packaging high-barrier composite film provided by the invention is excellent in barrier property.

The present invention provides: a method for producing a porous film, with which it is possible to produce a porous film that has a small pore diameter and excellent permeability of a fluid; and a porous film which is produced by the method for producing a porous film.　Provided is a method for producing a porous film, the method including a specific step in which a resin composition that contains a resin component (A), fine particles (B), and a solvent (S) is used, wherein: the resin component (A) is at least one selected from the group consisting of a polyamide acid, a polyimide, a polyamide-imide precursor, and a polyamide-imide; the fine particles (B) include fine particles (B1) and fine particles (B2); the fine particles (B1) and the fine particles (B2) each have an average particle diameter of 100 nm or less; and the average particle diameter of the fine particles (B2) is larger than the average particle diameter of the fine particles (B1).

The application discloses a kind of corrosion-resistant reducing flange and preparation method thereof, belong to reducing flange preparation technical field, manganese iron, silicon iron, iron ingot, copper ingot and graphite quality carbon additive are added into smelting furnace, smelt under argon protection, then add slag remover and stir evenly, after deslagging, rare earth alloy with silica coated magnesium oxide nano powder smelted is added, continue smelting, alloy liquid is cast into mould, and is cast into shape, it is immersed in electrolyte and is treated by anodic oxidation, surface is coated with polyamide imide primer, after solidification, polytetrafluoroethylene powder finish is sprayed using electrostatic spraying equipment, after electrostatic spraying, reducing flange semi-finished product is transferred to curing oven, and is cooled and taken out, to obtain a kind of corrosion-resistant reducing flange;The corrosion-resistant reducing flange has good high adhesion, high temperature resistance, long-acting anticorrosion performance.

This invention discloses a method for preparing insulated wires. Specifically, it includes annealing a rolled conductor to obtain an annealed conductor; coating the outer periphery of the annealed conductor with an insulating varnish to form a first pre-formed core wire; curing the first pre-formed core wire coated with the insulating varnish at high temperature to form an insulating layer, obtaining a second pre-formed core wire; coating the outer side of the insulating layer of the second pre-formed core wire with a topcoat containing a modified polyamide-imide intermediate to form a third pre-formed core wire; curing the third pre-formed core wire coated with the topcoat at high temperature to form a topcoat layer on the outer side of the insulating layer, and further obtaining an insulated wire. The insulated wire provided by this invention improves the flexibility of the wire, adapts to more compact arrangement of complex slots, thereby improving the slot fill factor of the motor, thus reducing the stator core volume at the same power, indirectly reducing the weight of the motor, and achieving the requirement of lightweighting.