491results about "Polyamide coatings" patented technology

The invention discloses lithium ion battery slurry and a coating process thereof, and belongs to the technical field of battery diaphragms. The lithium ion battery slurry comprises the following raw materials in parts by weight: 40-50 parts of ceramic powder, 10-15 parts of bio-based semi-aromatic polyamide, 10-15 parts of polyvinylidene fluoride, 35-45 parts of a solvent and 1-4 parts of a dispersing agent. The coating process comprises the following steps: A1, sequentially adding a solvent and a dispersing agent into a stirring tank, then adding ceramic powder, bio-based semi-aromatic polyamide and polyvinylidene fluoride, and uniformly stirring and mixing to obtain bio-based coating slurry; a2, feeding a polyethylene-based membrane into a coating device, coating by using the bio-based coating slurry prepared in the step A1, coating at least one side of a battery diaphragm by adopting a micro-concave roller coating mode, and drying and rolling the coated battery diaphragm to obtain a finished product of the ceramic-coated lithium battery composite diaphragm. The dispersing agent is used in the process of preparing the coating slurry, so that the mechanical property, the heat resistance and the adhesion property of the diaphragm can be improved.

The invention provides a preparation method of a two-dimensional high-strength coating material, which comprises the following steps: under the protection of inert gas, dissolving melamine and trimesoyl chloride as reaction monomers in a solution A, adding triethylamine as an acid-binding agent, and promoting amidation reaction through magnetic stirring; after the reaction is finished, washing with saturated saline solution and NaHCO3 to remove impurities, and then obtaining high-purity two-dimensional polymer powder through the steps of solution mixing, ultrasonic treatment, centrifugal separation and the like. And finally, dissolving polymer powder in the solution F to prepare two-dimensional polymer solutions with different concentrations, and coating the two-dimensional polymer solutions on the surface of a substrate pretreated by acetone and isopropanol to obtain a flat and compact coating film. The triethylamine is adopted as the acid binding agent, so that the purity and the reaction efficiency of the polymer are improved, the preparation controllability and the structural uniformity of the coating material are remarkably improved, and the high-performance coating requirements in the fields of machinery, chemical protection and the like are met.

The invention discloses a high-toughness biaxially oriented nylon film and a production method thereof. Comprising the following raw materials in parts by weight: 40-50 parts of copolymerized nylon resin, 10-20 parts of nylon 12, 15-25 parts of thermoplastic polyamide elastomer, 3-6 parts of nanofiller, 1-3 parts of coupling agent, 10-20 parts of reinforced fiber, 5-8 parts of additive, 3-7 parts of ethylene-methyl acrylate-glycidyl methacrylate terpolymer and 6-10 parts of modified cellulose nanocrystal. The invention relates to a flame-retardant polyamide resin, which is prepared from the following components in parts by weight: 2-4 parts of amino-terminated hyperbranched polyamide and 1-3 parts of 3, 3 '-diamino-4, 4'-difluorodiphenyl sulfone. The film is high in tensile strength, good in tear resistance and excellent in barrier property and low-temperature impact resistance.

The invention belongs to the technical field of vehicle protection materials, and particularly relates to a coating for an explosion-proof vehicle. The coating is composed of an adhesion bottom layer, an energy-absorbing middle layer and an anti-impact outer layer, wherein the adhesion bottom layer contains epoxy resin and flaky zinc powder / mica powder, and a laminated shielding structure is formed to improve the adhesion force to be larger than or equal to 8 MPa; the energy-absorbing middle layer is a composite material of modified nano silicon dioxide / polyethylene glycol-based STF and silanized aramid fiber, the viscosity of the energy-absorbing middle layer is sharply increased by more than 50 times at the strain rate of 500s <-1 >, and 65% of explosion impact energy can be absorbed; the anti-impact outer layer adopts a polyurea elastomer to wrap gradient distribution silicon carbide microspheres, pyramid-shaped protrusions are designed on the surface, the fragment defense speed reaches 430 m / s, and the shock wave reflection dispersion is increased by 50%. The whole anti-explosion coating passes UL94V-0 certification through a synergistic flame-retardant system, the chemical protection and self-cleaning capacity is improved through a super-hydrophobic surface layer, and the problems that a traditional anti-explosion coating is poor in adhesive force, weak in composite threat resistance and insufficient in environmental adaptability are solved.

The invention provides a conjugated frame encapsulated graphene functionalized polymer anti-corrosion anti-impact double-effect heat-conducting coating and a preparation method thereof, the method comprises the following steps: step S1, mixing graphene with a bromine source to prepare brominated graphene; step S2, adding a halogen monomer, a conjugated alkyne monomer, a catalyst and the brominated graphene obtained in the step S1 into a mixed solution, and inducing a conjugated frame to perform in-situ packaging on the surface of the graphene in an inert gas atmosphere to prepare conjugated frame packaged graphene; s3, performing high-temperature carbonization treatment on the conjugated frame packaged graphene obtained in the step S2, and permeating a corrosion-resistant matrix to prepare a conjugated frame packaged graphene functional polymer; and step S4, loading a heat conduction material and a thickening agent on the graphene functionalized polymer obtained in the step S3 to prepare the graphene functionalized polymer coating. The coating prepared by the invention has the characteristics of continuous conjugate frame, hierarchical pore structure and corrosion resistance and impact resistance, and is suitable for the field of protection of efficient heat exchange equipment.

An embodiment of the present invention relates to a film including a layer A, and a layer B provided on at least one surface of the layer A, in which a dielectric loss tangent of the film is 0.010 or less, and a ratio of an absorbance of the layer B at a wavelength of 355 nm to an absorbance of the layer A at a wavelength of 355 nm is 0.45 or more and 1.00 or less, and a laminate including a film having a layer A and a layer B, and a metal layer or a metal wire on a B layer side of the film, in which a dielectric loss tangent of the film is 0.010 or less, and a ratio of an absorbance of the layer B at a wavelength of 355 nm to an absorbance of the layer A at a wavelength of 355 nm is 0.45 or more and 1.00 or less.

A formulation and method for producing a multilayer film and a coated multilayer film comprising a barrier layer including a polar polymer resin, such as EVOH, as described.

The invention discloses a high-temperature-resistant water-soluble aramid coating diaphragm and a preparation method thereof, and belongs to the technical field of battery diaphragms. The diaphragm is obtained by coating the surface of a base membrane with water-soluble aramid fiber slurry and performing cross-linking and drying, the base membrane is a PE / PVA composite membrane; the water-soluble aramid fiber slurry is prepared from the following raw materials in parts by mass: 10 to 20 parts of modified aramid fiber polymer, 40 to 80 parts of deionized water, 3 to 6 parts of cosolvent and 5 to 8 parts of multi-epoxy group cross-linking agent; the modified aramid fiber polymer is obtained by carrying out polymerization reaction on 1, 4-phenylenediamine-2-sulfonic acid and 2, 6-dipicolinic acid. The hydrophilic property of the polymer is improved by the pyridine ring and sulfonic acid introduced into the modified aramid polymer, the prepared water-based slurry is more environment-friendly, the reaction of the multi-epoxy group cross-linking agent and the polyvinyl alcohol of the PE / PVA composite diaphragm under the heating condition is promoted through the sulfonic group, a cross-linked network is formed, and the binding force of the coating and the base membrane is enhanced.

The invention provides a polymer total heat exchange membrane with a Tailing structure and a preparation method and application thereof.The polymer total heat exchange membrane comprises a net-shaped porous supporting layer and a functional layer, and the functional layer is arranged on the single-side surface of the net-shaped porous supporting layer and fills at least part of pores of the net-shaped porous supporting layer; the functional layer is provided with an uneven Turing structure; the net-shaped porous supporting layer and the functional layer with the uneven Tailing structure are matched, so that the obtained polymer total heat exchange membrane has excellent moisture permeability and is suitable for being applied to a fresh air exchange system.

The invention discloses a flame-retardant bio-based lithium battery diaphragm and a production process thereof, and belongs to the technical field of battery diaphragms. Comprising the following steps: S1, uniformly mixing nano silicon dioxide, an amino-containing silane coupling agent and a solvent, heating, stirring, washing and freeze-drying to obtain amino-modified silicon dioxide; mixing the amino-modified silicon dioxide, p-hydroxybenzaldehyde, glacial acetic acid, anhydrous magnesium sulfate and absolute ethyl alcohol, and performing heating reflux, cooling precipitation and vacuum drying to obtain modified silicon dioxide; s2, uniformly mixing diamine containing the furan ring structure, acyl chloride containing the furan ring structure and an organic solvent in an inert atmosphere, adjusting the pH value, heating and stirring to obtain a mixed solution; uniformly mixing and stirring the mixed solution with modified silicon dioxide and tannic acid to obtain a bio-based polymer coating solution; and S3, coating a base material with the bio-based polymer coating liquid to prepare the flame-retardant bio-based lithium battery diaphragm.

The invention discloses an antibacterial coating which comprises a component A and a component B. The component A comprises the following raw materials in parts by weight: 40-60 parts of epoxy resin, 15-35 parts of polyamide resin, 5-10 parts of tea tree essential oil, 1-3 parts of di (2-ethylhexyl) phthalate, 1-2 parts of fumed silica, 1-2 parts of acrylate, 1-2 parts of sodium phosphate and 1-2 parts of polyvinyl ether. The component B comprises the following raw materials in parts by weight: 20-30 parts of modified nano zinc oxide, 40-60 parts of an antibacterial curing agent, 15-20 parts of butanol and 2-10 parts of acetone. The weight ratio of the component A to the component B is 8: (2-4), and the water-resistant coating is excellent in mechanical property, high in adhesive force and good in water resistance.

The present disclosure relates a method of chemical polishing a 3D printed object. The method comprises treating a 3D printed object with solvent to reduce the surface roughness of the 3D printed object, and controlling the Youngs modulus of the 3D printed object within a target value by selectively removing at least part of the solvent from the 3D printed object.

Lightweight composite building panels with incorporated drainage layer that facilitates moisture removal and methods of manufacturing and using lightweight composite building panels with incorporated drainage layer. The lightweight composite building panels with incorporated drainage layer can be used to applied a desired finish to exterior wall and roof structures. The lightweight composite building panels include a core composite panel structure and a drainage layer attached or bonded thereto. The core composite panel structure includes a foam core sandwiched between first and second protective layers, such as a fiber mesh reinforced cementitious composition and / or cured thermoset resin or other rigid material. The drainage layer is designed to face an exterior wall or roof structure to facilitate removal of moisture between the panels and underlying wall or roof structure. The building panels can be cut, drilled, and screwed, nailed, or glued to structural elements of buildings, such as OSB sheathing.

A matting agent for powder coatings and its application, and a matte powder coating and its application are disclosed. The matting agent for powder coatings includes a hydroxyl functional component and a carboxyl functional component, the matting agent can achieve the matting effect of HAA powder coatings with <30% gloss (60°); the resin selectivity of the matting agent is low, and a good matting effect can be realized when used in combination with different carboxyl film-forming resins; and the matting effect of the matting agent is stable, and the prepared matte powder coating can obtain a stable matting effect under different curing conditions.

The invention provides a composite coating for a battery diaphragm as well as a preparation method and application thereof, and relates to the technical field of secondary batteries. Specifically, the composite coating for the battery diaphragm comprises a heat-resistant polymer, a modified ceramic material, a binding material and a flame-retardant material, wherein the modified ceramic material comprises a ceramic material of which the surface is grafted with an MOFs (Metal-Organic Frameworks) material, and the ceramic material comprises porous ceramic particles and ceramic nanowires. By designing and providing the coating, the liquid absorption and liquid retention performance of the battery diaphragm are remarkably improved, the liquid injection time of the battery can be greatly shortened, the manufacturing efficiency is improved, and the cycle life of a battery cell is prolonged; meanwhile, the diaphragm disclosed by the invention is excellent in flame retardance and heat resistance, can effectively improve the safety performance of the battery, and has a good application prospect.

The invention belongs to the technical field of coatings, and discloses a water-based epoxy coating for automobiles and a preparation method thereof.The water-based epoxy coating is prepared by preparing water-based rigid epoxy resin, water-based flexible epoxy resin, a diamine curing agent and a block polymer as components in the water-based epoxy coating and matching the four components with a step-by-step coating process. High-activity amido in the curing agent and rigid resin form a high-density network to endow the top layer with hardness, the curing agent and flexible resin form hardness and softness to improve the toughness of the bottom layer, epoxy groups of the block polymer and low-activity amido in the bottom layer are covalently anchored, carboxyl and the amido in the top layer form amido bonds, firm molecular bridges are constructed, interlayer reinforced connection is achieved, and the bonding strength is improved. The coating has high hardness, high toughness and excellent interlayer adhesive force, and solves the problem of non-uniform performance caused by low crosslinking density and side reaction of the traditional waterborne epoxy coating.

One example of a jettable antioxidant formulation is used for three-dimensional (3D) printing. The jettable antioxidant formulation includes an antioxidant blend; a surfactant, a dispersant, or a combination thereof; a water-soluble or water-miscible organic co-solvent; and water. The antioxidant blend consists of a primary antioxidant and a secondary antioxidant.

The invention relates to a copolyamide elastomer with a nitrogen-containing side group and a preparation method and application thereof, the copolyamide elastomer comprises a copolymer with a hard segment and a soft segment, and the soft segment is a polyether soft segment and / or a polyester soft segment; the hard segment comprises repetitive units as shown in a formula (1) and a formula (2), and a nitrogen-containing side group R3 is substituted or unsubstituted amino. The copolyamide elastomer disclosed by the invention is low in melting point and easy to form and process, has the characteristic of photoluminescence, can convert part of ultraviolet light into blue light, and has relatively high transmittance to visible light.

The invention relates to the technical field of insulating paint, in particular to insulating paint capable of preventing bird damage and foreign matter lap joint and a preparation method of the insulating paint. The invention provides an insulating coating for preventing bird damage and foreign matter lap joint. The insulating coating is prepared from the following raw materials in parts by weight: 55 to 80 parts of methylsilane modified polyurethane liquid, 23 to 40 parts of polyamide fiber nano powder, 10 to 20 parts of organic silicon modified calcium lignosulphonate suspension, 8 to 10 parts of hydrophobic silicon dioxide, 2 to 5 parts of flatting agent, 1 to 2 parts of pigment, 3 to 5 parts of anti-aging agent and 10 to 15 parts of diluent. The insulating property of the coating is extremely high, the withstand voltage value per millimeter can reach 40kV and above, while the withstand voltage value per millimeter of a conventional insulating coating is generally 18kV; and the insulating paint is high in strength and good in toughness, and has good hydrophobicity and hydrophobicity migration.

The invention discloses a heat-resistant stable perfluorosulfonic acid composite proton exchange membrane and a preparation method thereof, and relates to the technical field of proton exchange membranes. The perfluorosulfonic acid composite proton exchange membrane is composed of a perfluorosulfonic acid resin base membrane and a composite layer, the composite layer comprises aramid nanofiber (ANF), graphene oxide, sulfonated graphene and a core-shell structure inorganic phase (silicotungstic acid (at) SiO2), and a three-dimensional cross-linked network is formed through a gradient heat treatment process; and coating a perfluorosulfonic acid resin base membrane with the membrane casting solution, and carrying out gradient heat treatment after stepped drying to prepare the perfluorosulfonic acid composite proton exchange membrane. The perfluorosulfonic acid composite proton exchange membrane researched and developed by the invention solves the problems of mechanical strength attenuation and insufficient ion selectivity of a traditional proton exchange membrane in a high-temperature and high-humidity environment, and is suitable for energy equipment such as a fuel cell and a flow battery.

The invention provides a preparation method of an environment-friendly two-dimensional high-strength coating and a raw material recycling method, and the preparation method comprises the following steps: preparing trimesic acid, melamine, a solution A and a solution B into a reaction solution according to a proportion in a glove box, and putting the reaction solution into a high-pressure reaction kettle to react to form gel; and mixing the gel with ethanol, carrying out ultrasonic treatment, filtering, washing and drying to obtain faint yellow polymer powder, dissolving the powder in trifluoroacetic acid, and preparing film coatings with different thicknesses by adjusting the concentration of the solution. According to the raw material recovery method of the coating, an acid catalyst is used for hydrolysis, trimesic acid and melamine are recovered, and the recovery rate reaches 88.9% or above. The prepared coating material has the advantages of high strength, low density, excellent leakproofness and chemical corrosion resistance, raw material recycling is realized, the production cost is reduced, the green and environment-friendly requirements are met, and the coating material is suitable for light high-strength materials, protective coatings and other high-performance application fields.

The invention belongs to the field of lithium ion batteries, and particularly relates to an aramid polymer coated lithium ion battery diaphragm and a preparation method thereof, the diaphragm takes a polyethylene porous base membrane as a support body, and the surface of the polyethylene porous base membrane is coated with a composite coating containing a para-aramid polymer, two specific modified compounds and aluminum oxide. The two key modified compounds are perfluorophenylimidazole lithium salt and tetracyanobenzene dicarboximide dimethyl ammonium respectively, and the preparation method is realized through step-by-step reaction of commercially available raw materials. The preparation method of the diaphragm comprises the following steps: carrying out corona treatment on a base membrane, synthesizing an aramid fiber glue solution at a low temperature, adding two modified compounds, dispersing the two modified compounds and aluminum oxide to form a coating solution, and carrying out coating, coagulating bath phase inversion, water washing and vacuum drying to obtain a finished product. The two modified compounds have a synergistic effect, so that the thermal stability, ionic conductivity and electrode interface compatibility of the diaphragm are remarkably improved, and the finally prepared diaphragm has excellent thermal dimensional stability and electrochemical performance and is suitable for high-safety and long-service-life lithium ion batteries.

The invention belongs to the technical field of coatings, and particularly relates to polyester resin for a powder coating as well as a preparation method and application of the polyester resin. The polyester resin for the powder coating is prepared from the following raw materials: polyol, polyacid, polyamide acid oligomer and an acidifying agent. The polyamide acid oligomer is introduced in the synthesis of the polyester resin, an amide structure in the polyamide acid oligomer can improve the electrification property of polyester, the improvement of the electrification property is beneficial to improving the powdering rate of powder, and meanwhile, an N-H bond in the amide structure has relatively strong polarity and hydrogen-bond interaction; the wettability of the base material is obviously improved through the synergistic effect of the two. Therefore, the polyamide acid oligomer is introduced into the polyester resin and is combined with other components, so that the corner coverage rate of the powder coating can be obviously increased.

The present invention discloses a novel functional nylon marking paint equipment and a paint preparation method, belonging to the technical field of road markings. The paint equipment includes a vehicle frame, a marking hopper, a first wire tube and a control rod. The marking hopper includes a hopper, a gate, a push block and a first connection end. The gate is rotatably installed on one side of the hopper. When the gate is opened, a marking opening can be exposed at the bottom of the hopper. The push block is rotatably installed on the hopper. Rotating the push block can open the gate to open the marking opening. The first connection end is installed on the hopper. The control rod is connected to the hopper. A handle seat is installed on the control rod, and a handle is movably arranged on the handle seat. The two ends of the first wire tube are respectively connected to the handle seat and the first connection end. A first pulling rope is inserted into the first wire tube, and the two ends of the first pulling rope are respectively connected to the push block and the handle. The novel functional nylon marking paint equipment of the present invention has various functions, making the construction simpler and more convenient.

This disclosure describes curable coating compositions and methods for coating the surfaces of objects such as metal objects. The coating compositions may include organic and / or inorganic solid adsorbents and may provide a durable curable coating layer that can be used to adsorb specific molecules such as carbon dioxide or water onto the surface of a metal object.

A copolyamide-based powder intended for forming a coating on a surface, having an inherent viscosity of greater than or equal to 0.8 (g / 100 g)−1, in which the copolyamide has a melting point of less than or equal to 160° C. Also, the use of such a powder for coating a surface, the coating having an inherent viscosity of greater than or equal to 0.8 (g / 100 g)−1, and also a process for coating a surface using such a powder.

The disclosed subject matter relates to methods for the dispersion processing of high aspect ratio nanomaterials, such as boron nitride nanotubes, into macrostructures. For example, the disclosed subject matter relates to boron nitride nanotube fibers and films, and methods of making and use thereof. In some examples, the methods are surfactant-free and / or sonication-free.

The present invention provides a wave-absorbing heat-generating coating for melting ice on a wind turbine blade, and a preparation method therefor. By means of coating the surface of a wind turbine blade with the material, an ice layer on the surface of the wind turbine blade is removed by means of the cooperation between same and microwaves. The coating provided in the present invention uses environmentally friendly chemical components, can be sprayed on a large area of a wind turbine blade, has the advantages of a self-cleaning ability, resistance to heat and humidity, freezing resistance, etc., and does not corrode the wind turbine blade. By means of the coating of the present invention cooperating with microwaves for de-icing, microwave energy can be better absorbed and converted into heat energy to rapidly melt ice at an interface, thereby loosening an ice surface and detaching same. The coating has the advantages of strong microwave absorption, a wide frequency band, high wear resistance, strong adhesive force, good thermal stability, etc.

The invention relates to the technical field of electrophoresis coatings, in particular to an electrophoresis-non-electrophoresis composite coating and a preparation method thereof. The invention provides an electrophoresis-non-electrophoresis composite coating. The composite coating comprises an electrophoresis coating and a non-electrophoresis coating compounded on the surface of the electrophoresis coating, the component of the electrophoretic coating comprises polyimide; the component of the non-electrophoretic coating comprises macromolecular resin; the absolute value of the difference between solubility parameters of the polymer resin and the polyimide is less than 1.3 (J / cm < 3 >) 1 / 2; according to the prepared electrophoresis-non-electrophoresis composite coating, the excellent adhesiveness between an electrophoresis coating and a non-electrophoresis coating can be guaranteed, and the comprehensive performance, such as insulativity, scratch resistance, cohesiveness, corona resistance and / or PDIV, of the composite coating can be effectively improved.

The invention discloses a high-epoxy-adhesion long-carbon-chain nylon composition as well as a preparation method and application thereof. The high-epoxy-adhesion long-carbon-chain nylon composition is prepared from the following components in parts by weight: 79-94 parts of long-carbon-chain nylon, 5-20 parts of a toughening agent, 0.2-2 parts of an antioxidant, 0.1-0.5 part of a synergistic stabilizer, 0-1 part of a light stabilizer and 0-2 parts of color master batch, according to the invention, long carbon chain nylon is compounded with the active group grafted polyolefin elastomer flexibilizer to synergistically improve the toughness of the material and the adhesive force to a prime coat material containing an epoxy component, the active group grafted flexibilizer greatly improves the toughness of a nylon matrix, and the functional group of the active group grafted flexibilizer is used as a chemical anchor point; firm covalent bond combination is formed with the epoxy prime coat, so that high adhesion and high impact strength which are difficult to consider by a traditional material are realized; the catalytic degradation risk of metal ions on amido bonds is reduced through the synergistic stabilizer, long-term stability of the performance of the composition is guaranteed, and the application requirement of coating resin on the surface of the Bundy tube is met.