165 results about "Polyamide-imide" patented technology

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 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.

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 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.

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 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 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.

The invention relates to an intrinsic flame-retardant low-dielectric epoxy resin. The molecular structure of the epoxy resin comprises a) a biphenyl group, and at least one of b) a polyphenylene oxide (PPO) group, c) a polyether sulfone (PES) group or d) a polyamide imide (PAI) group. The preparation method comprises the following steps: dissolving biphenyl epoxy resin in a solvent, adding a polymer with an active group, adding independently or in a certain proportion in a combined manner, fully dissolving, adding a catalyst, heating, and carrying out solution polymerization; and after the reaction is finished, supplementing the solvent to prepare the solvent type modified epoxy resin. The obtained product can improve the limit oxygen index of the epoxy resin, reduce the dielectric constant Dk and the dielectric loss factor Df, realize a greener and more environment-friendly flame-retardant target, and better adapt to the performance requirements of high-end electronic products on high-speed transmission and low loss of electric signals.

A guidance tab is provided for separating a cartridge round at its base from an aft linkage bracket within an ammunition chain. The tab includes a plate, a pair of legs and a pair of feet, and is composed of polyamide-imide. The plate has an obverse surface for engaging the base of the cartridge round and a reverse surface for engaging the aft linkage bracket. The plate is oriented along a longitudinal direction of the ammunition train and a lateral direction orthogonal to an axial direction of the cartridge round. The pair of legs extends from flanking sides of the plate in the axial direction towards the aft linkage bracket. The pair of feet extend substantially parallel to the plate. Each foot extends from a respective leg of the pair of legs.

The invention discloses a preparation method of polyamide-imide, and belongs to the field of high polymer materials. The method comprises the following steps: dissolving trimellitic anhydride acyl chloride or a mixed monomer thereof in an organic solvent with a boiling point lower than 120 DEG C to form a solution; adding a diamine monomer under inert gas protection and low-temperature conditions to react to generate a prepolymer; separating out the prepolymer and drying to obtain prepolymer powder; finally, the prepolymer powder is extruded and granulated through a double-screw extruder, and the polyamide-imide is obtained. By using the low-boiling-point solvent and combining the twin-screw extrusion process, the solvent residue is reduced, the introduction of a chemical imidization reagent is avoided, and the prepared polyamide-imide has high transparency and good mechanical property retentivity and solubility. The invention also provides the polyamide-imide prepared by the method and a product of the polyamide-imide.

This invention belongs to the field of gas separation membrane technology, specifically relating to a polyamide-imide hollow fiber membrane, and further disclosing its preparation method and its application in preparing helium separation membranes. The method for preparing a polyamide-imide hollow fiber membrane provided by this invention includes the step of preparing a polyamide-imide casting solution, and the step of performing dry-wet spinning on the casting solution to obtain the desired polyamide-imide hollow fiber membrane. The polyamide-imide hollow fiber membrane obtained by this invention has a helium selectivity to nitrogen ratio greater than 5, meeting the requirements of industrial applications, and also exhibits a high helium flux.

A package coating on at least a portion thereof with a coating, the coating being derived from a coating composition, the coating composition comprising: a) a polyamide imide (PAI) resin, and b) a crosslinking agent comprising an isocyanate material and an epoxy material, wherein the coating composition is substantially free of pyrrolidone solvents.

The invention discloses an anti-eccentric-wear cladding coating material as well as a preparation method and application thereof. The anti-eccentric-wear cladding coating material is prepared from the following raw materials in parts by weight: 15 to 22 parts of modified novolac epoxy resin, 8 to 15 parts of polyether-ether-ketone, 10 to 18 parts of nano tungsten carbide, 0.5 to 2 parts of graphene oxide, 5 to 8 parts of polyamide-imide, 1 to 3 parts of silane coupling agent, 2 to 5 parts of nano titanium dioxide, 3 to 6 parts of diaminodiphenyl sulfone, 5 to 10 parts of spherical aluminum powder, 1 to 3 parts of molybdenum disulfide, 0.5 to 1 part of defoaming agent and 0.3 to 0.8 part of flatting agent. Through selection of the raw materials, the anti-eccentric-wear cladding coating material has the performance of high hardness, high toughness and excellent interface bonding force, and can meet the requirement that the friction life is larger than or equal to 5 million times under the complex well condition.

The application provides a coating liquid and a preparation method and application thereof, and a hydrophobic and anti-fouling coating and a preparation method thereof, and belongs to the technical field of medical functional materials. The application provides a coating liquid, which comprises the following components in mass content: 20-60% of solvent type polyamide-imide resin; 1-5% of thermoplastic elastomer resin; 1-5% of thermoplastic fluororesin; and the balance of diluent; the thermoplastic elastomer resin comprises maleic anhydride grafted styrene elastomer; and the thermoplastic fluororesin comprises polyperfluoroethylene propylene. The polyperfluoroethylene propylene resin used in the application can provide good hydrophobic and anti-fouling properties, and has thermoplasticity which polytetrafluoroethylene does not have; the maleic anhydride grafted styrene elastomer can improve the toughness of the coating and effectively absorb ultrasonic energy; and the polyamide-imide resin used as the base resin of the coating can provide good chemical stability and heat resistance and certain mechanical strength for the coating, and effectively fix other components of the coating.

Provided is a resin composition for a film, which is capable of providing a film having high resilience. A resin composition containing: one or more resins selected from the group consisting of polyamideimide resins and polyamide resins; and a thermally reactive crosslinking agent.

The invention provides a coating composition capable of forming a coating film with excellent corrosion resistance and a coated article. A coating composition containing a polyethersulfone resin, at least one polyimide resin selected from the group consisting of a polyamideimide resin and a polyimide resin, a non-melt-processable fluorine-containing polymer, and a melt-processable fluorine-containing polymer.

A coated cooking element for a kitchen utensil or electrical cooking appliance includes a metal substrate coated, on at least one face, with a single layer which, by one of its faces, is in contact with the metal substrate and one of the faces of which forms a cooking face. The layer includes one or more silicone resins, one or more heterocyclic thermoplastic polymers selected from the group consisting of polyetherimides, polyimides), polyamide imides, and polybenzymidazole, and optionally one or more aromatic thermoplastic polymers, one or more fillers and / or one or more additives and / or one or more coloring agents; a process for manufacturing same, a kitchen utensil or an electrical cooking appliance including same.

The invention provides a polyamideimide perfluoroalkyl composite material, a coating film and a preparation method of the polyamideimide perfluoroalkyl composite material, and belongs to the technical field of high polymer materials, the polyamideimide perfluoroalkyl composite material comprises the following raw materials by mass: 100 parts of a base slurry, 1-40 parts of a functional filler, 1-100 parts of a solvent, 0.1-1 part of an antifoaming agent, and 0.1-1 part of a dispersant; wherein the basic slurry is a water-based polyamide-imide emulsion; the functional filler is a perfluoroalkyl material. The antifriction water-oxygen-resistant polyamide-imide composite material has the advantages of being low in friction coefficient, high in hydrophobicity, wide in raw material source, environmentally friendly and high in dispersion stability.

The embodiments provide a polyamide-imide-based film, which comprises a polyamide-imide-based polymer, wherein when the coefficients of thermal expansion in the MD direction and TD direction of the film are measured at an interval of 5° C. in a temperature range of 300° C. to 365° C., respectively, the temperature at which the coefficient of thermal expansion in the MD direction or the coefficient of thermal expansion in the TD direction changes from a positive value to a negative value is 330° C. to 345° C., a process for preparing the same, and a cover window and a display device comprising the same.

An embodiment relates to a polyamideimide, including: a structure derived from a compound including at least one selected from the group consisting of a diamine and a diisocyanate, and a structure derived from a carboxylic acid compound including at least a tricarboxylic anhydride, wherein at least one selected from the compound and the carboxylic acid compound includes a compound having a group that includes at least one non-aromatic hydrocarbon group, where a total number of carbon atoms in the at least one non-aromatic hydrocarbon group is eight or more, and at least one selected from the compound and the carboxylic acid compound includes a compound having an aromatic hydrocarbon group.