290 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 design and manufacturing method of a polyamideimide composite coating gear, which comprises the following steps: S1, collecting customer demands, sequencing the priorities of the customer demands, and establishing a quality house based on a quality function expansion method; s2, formulating a design project according to the priority of the customer demand; s3, preliminarily evaluating the feasibility of the design project through probability evaluation and risk analysis tools; s4, key quality characteristics are obtained, and a tolerance limit range is determined; s5, on the basis of a multi-objective optimization machining parameter reverse adjustment method, a parameter-driven input and output model is established; s6, inputting the key quality characteristics into the input and output model to obtain a design scheme; s7, inputting the design scheme into the multi-objective optimization model to obtain optimized key quality characteristics; s8, planning a manufacturing process based on customer requirements and optimized key quality characteristics; and S9, manufacturing a composite coating gear sample, testing the composite coating gear sample, and verifying the service performance of the composite coating gear sample.

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 provides corona-resistant polyamide-imide insulating paint and a preparation method and application thereof, the polyamide-imide insulating paint is prepared from the following raw materials: aromatic tricarboxylic anhydride, aromatic diisocyanate and alcoholic hydroxyl group modified silicon dioxide nanoparticles, and the three materials are matched to prepare the corona-resistant polyamide-imide insulating paint. The obtained polyamide-imide insulating paint has excellent storage stability before curing, and after curing, silicon dioxide nanoparticles can be uniformly dispersed in a formed insulating paint film and are not easy to agglomerate; and therefore, the enameled wire prepared from the polyamide-imide insulating paint has excellent corona resistance and excellent flexibility, and is suitable for being applied to a high-voltage motor.

The invention relates to the field of cable materials, and particularly discloses a high-strength fireproof cable and a preparation method thereof.The high-strength fireproof cable comprises a conductor, an insulating layer, a flame-retardant layer and an outer sheath; the outer sheath material comprises the following raw materials: modified polyamide-imide resin, linear low-density polyethylene, amino modified carbon fiber, a styrene-maleic anhydride copolymer and genipin; the preparation method comprises the following steps: firstly, heating and mixing the modified polyamide-imide resin, the amino modified carbon fiber and the genipin, and then adding other raw materials for melt blending granulation to prepare the outer sheath; and sequentially assembling the conductor, the insulating layer, the flame-retardant layer and the outer sheath to obtain the high-strength fireproof cable. The fireproof cable has the advantages that the mechanical strength of the fireproof cable is kept under the long-term high-temperature condition, and the mechanical strength and the thermal aging performance of the cable are improved.

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.

Provided are a polyamideimide resin, a polyamideimide resin film, and a method for manufacturing the same, the polyamideimide resin being characterized in that the polyamideimide resin is obtained by polymerizing a first monomer, a second monomer, and a third monomer, the first monomer being tetracarboxylic dianhydride, the second monomer being tetracarboxylic dianhydride, and the third monomer being tetracarboxylic dianhydride. The second monomer is diamine represented by the following chemical formula (i), and the third monomer is a dicarboxylic acid derivative, NH2-R-NH2. Chemical formula (i) wherein R is phenylene having more than one substituted or unsubstituted benzene ring structure, and when R is phenylene having more than two benzene ring structures, R is a phenyl group having more than one substituted or unsubstituted benzene ring structure, and when R is a phenyl group having more than one substituted or unsubstituted benzene ring structure, R is a phenyl group having more than one substituted or unsubstituted benzene ring structure, R is a phenyl group having more than one substituted or unsubstituted benzene ring structure. The more than two benzene ring structures are connected by a single bond,-O-,-S-,-C (= O)-or-CH (OH)-, and the substitution means that phenylene is substituted by-CCl3,-CBr3 or-CF3.

The invention discloses a preparation method of a polyamide-imide-polyimide copolymer resin binder and a semiconductor element temporary packaging adhesive film, and the preparation method comprises the following steps: under the protection of inert gas, dissolving flexible long-chain aromatic diamine, siloxane diamine and 4, 4 '-dithio diphenylamine in a polar organic solvent, and stirring to obtain a mixed solution; the preparation method comprises the following steps: adding an acid-binding agent, uniformly stirring and mixing in an ice bath, adding trimellitic anhydride acyl chloride for reaction, heating to 15-45 DEG C, adding flexible long-chain dianhydride for reaction, adding an end-capping reagent for end capping, and diluting; adding a catalyst and a water absorbent into the diluted reaction liquid to carry out imidization treatment to obtain polyamide-imide-polyimide copolymer resin; diluting the polyamideimide-polyimide copolymer resin adhesive until the solid content is 15-25%, adding siloxane epoxy resin, and uniformly stirring and mixing, so as to obtain the polyamideimide-polyimide copolymer resin adhesive. The heat-resistant adhesive has excellent heat resistance and cohesiveness, and no adhesive residue exists in the stripping process.

The invention discloses a composition, polyamideimide, a polyamideimide film and a preparation method and application thereof, relates to the technical field of high-molecular polymers, and aims to solve the problem that wire enamel is poor in mechanical property at a relatively low dielectric constant. The composition comprises a dianhydride compound, a diamine compound and a cross-linking agent. The cross-linking agent is selected from any one of the structural formulas shown in the general formula I. In the formula, R1 is selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, and a substituted or unsubstituted alkoxy group; r2 is selected from a blocking group; n1 > = 2.

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.

The present invention relates to a continuous, solvent free, process for producing poly(amide-imide) polymer, the process comprising the steps of a. Feeding a polycarboxylic acid anhydride, and a compound having at least two isocyanate functional groups through one or more feeding ports into an extruder; b. Mixing and melting the composition inside the extruder; c. Reacting the composition inside the extruder at a temperature in the range of 260 – 400°C; d. Collecting the reacting mixture at the exit of the extruder; and e. Cooling the reacting mixture.

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.

The invention relates to the technical field of batteries, in particular to an electrode and a lithium ion battery. The electrode comprises an electrode active material layer, the electrode active material layer comprises an electrode active material, a first binder, a second binder and a plasticizer, the first binder comprises polyamide-imide, and the second binder comprises at least one of sodium carboxymethyl cellulose, sodium alginate, polyacrylic acid, polyvinyl alcohol and chitosan; a dispersion medium of the electrode active material layer comprises water; based on the total weight of the electrode active material layer, the content of the first binder is 0.2%-20%, and the content of the second binder is 0.1%-10%; the lithium ion secondary battery includes the electrode of the present invention. The lithium ion battery provided by the invention has good discharge power characteristic, long service life and cycle performance.

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 present invention discloses a high-voltage resistant composite polyamideimide enamelled round aluminium wire, which comprises a conductor, a polyamideimide coating and a polyesterimide paint coating; the polyamideimide coating is prepared by the following steps: by weight, adding 50-60 parts of polyamideimide resin, 10-15 parts of functional filler and 2-5 parts of polyphenylene sulfide into 50-80 parts of N-methylpyrrolidone, heating to 45-60 °C, stirring evenly and then coating on the surface of the conductor, and curing to obtain the polyamideimide coating; the high-voltage resistant composite polyamideimide enamelled round aluminium wire is prepared by the following steps: evenly coating the surface of the round aluminium wire with polyamideimide paint to form a polyamideimide coating, then coating a polyesterimide coating, and curing to obtain the polyamideimide enamelled round aluminium wire, and finally coating a layer of surface lubricant on the surface of the polyamideimide enamelled round aluminium wire, so that the enamelled wire can be closely arranged during wire winding and is convenient for users to wind coils.