1875results about "Polyether coatings" patented technology

Provided are electrochemical cells with at least a portion of the exterior surface coated in an aversive coating to deter children from eating the electrochemical cell. Described are compositions and methods for improving the adhesion of the aversive coating to the surface of the electrochemical cell.

The invention relates to the technical field of lubricating coatings, in particular to a low-temperature curing lubricating coating for a fan bearing and a preparation method of the low-temperature curing lubricating coating. The lubricating coating is prepared from the following components in parts by weight: 55 to 65 parts of mixed solvent, 10 to 15 parts of composite bonding resin, 10 to 15 parts of modified lubricating filler, 8 to 12 parts of wear-resistant filler, 0.5 to 3 parts of dispersing agent, 0.5 to 1 part of micronized dicyandiamide, 0.5 to 2 parts of flatting agent, 0.5 to 2 parts of defoaming agent and 0.5 to 1 part of anti-settling agent, wherein the composite bonding resin is prepared from the following components in parts by weight: 10 to 20 parts of organic silicon resin, 15 to 30 parts of novolac epoxy resin, 15 to 30 parts of urethane acrylate and 35 to 45 parts of polyhydroxy polyether resin; the modified lubricating filler is obtained by modifying mixed powder containing molybdenum disulfide and polytetrafluoroethylene. The adhesive force, the wear resistance and the lubricating property of the lubricating coating can be improved, and the curing temperature can be reduced.

The invention discloses reflection-heat insulation dual-functional aluminum oxide ceramic and a preparation method and application thereof.The method comprises the steps that after surface silanization treatment is conducted on nanoscale hollow oxide filler, surface-modified nanoscale hollow oxide filler is prepared; and then adding the surface-modified nanoscale hollow oxide filler into a high-molecular polymer and a mixed polar solvent to obtain the thermal insulation coating. The method comprises the following steps: coating the surface of aluminum oxide ceramic with a heat insulation coating to form a primary coating, and carrying out gradient heating curing to obtain aluminum oxide ceramic with a functionalized heat insulation coating; and coating the surface of the thermal insulation coating functionalized aluminum oxide ceramic with an infrared reflection coating, and carrying out annealing treatment in a nitrogen atmosphere to prepare the reflection-thermal insulation dual-functionalized aluminum oxide ceramic. By constructing a double-layer composite structure, enhancing interface thermal resistance through chemical bonding, directionally distributing the nanofiller and designing a low-radiation layer structure, heat conduction and radiation heat transfer of the aluminum oxide ceramic-based material are synergistically reduced, and the high-temperature heat insulation performance of the aluminum oxide ceramic-based material is improved.

This invention relates to a sealing solution kit comprises: a medium temperature sealing solution; and a high temperature sealing solution. This invention also provides a method for sealing an anodized aluminum alloy surface by using the sealing solution kit, an article which has at least one portion that comprises side treated surface by the sealing solution kit demonstrates improved corrosion resistance and vehicles comprising said surface treated articles as automotive parts. The vehicles with said surface treated articles can endure harsh environmental conditions.

The invention discloses a radiation refrigeration coating and a preparation method thereof. The radiation refrigeration coating comprises a first filler and a second filler, the mass ratio of the first filler to the second filler is (1-3): (1-5), and the first filler comprises the following components in percentage by weight: 50-70% of a polyurethane emulsion, 10-15% of a silane coupling agent, 8-10% of multi-mesoporous nano-silica and 5-8% of talcum powder; the second filler comprises the following components in percentage by weight: 60%-70% of polyethylene glycol, 10%-15% of a dispersing agent and 5%-8% of nano barium oxide; 5%-8% of tannic acid; 3%-5% of nano silver; the viscosity of the polyurethane emulsion ranges from 300 cps to 800 cps. The radiation refrigeration coating disclosed by the invention has the advantages that a refrigeration film has larger infrared radiation refrigeration capacity in an atmospheric window, better ultraviolet light absorption capacity and long service life.

The invention belongs to the technical field of paint coatings, and particularly relates to a hydrophobic heat-conducting self-repairing coating and a preparation method thereof. The preparation method of the hydrophobic heat-conducting self-repairing coating comprises the following steps: ultrasonically dispersing a heat-conducting filler and polyethylene glycol in an organic solvent, dropwise adding into a water-borne epoxy resin solution, and stirring to obtain a heat-conducting coating solution; the method comprises the following steps: dropwise adding a liquid A containing polysiloxane and a fluorine-containing monomer into a liquid B containing polyethylene glycol, stirring, carrying out centrifugal suction filtration, and drying to obtain the self-repairing microcapsule. Then adding the self-repairing microcapsules and silicon dioxide into the fluorine-containing polymer solution and / or the hydrophobic resin solution, and carrying out ultrasonic dispersion to prepare a self-repairing hydrophobic coating solution; the heat-conducting coating liquid and the self-repairing hydrophobic coating liquid are uniformly sprayed or spin-coated on the surface of a metal base material in sequence and then are subjected to UV curing, and the hydrophobic heat-conducting self-repairing coating is prepared. According to the method, the process and raw materials are simple, and the prepared coating has heat conduction and self-repairing performance and is excellent in anti-aging performance.

The invention relates to the technical field of coatings, and discloses a wear-resistant waterborne polyurethane finish paint and a preparation method thereof. The wear-resistant waterborne polyurethane finish paint comprises a component A and a component B in a mass ratio of (4-7): 1, the component A is prepared from the following components in parts by mass: 50 to 60 parts of waterborne polyurethane, 10 to 15 parts of hyperbranched polysiloxane, 2 to 3 parts of polyoxyethylene fatty acid, 0.8 to 1.2 parts of a de-foaming agent, 6 to 8 parts of color paste and 10 to 15 parts of water; and the component B comprises an isocyanate curing agent. The wear-resistant waterborne polyurethane finish paint prepared in the invention has excellent adhesion strength and wear resistance.

The invention belongs to the technical field of polymer composite materials, and particularly relates to an oil-resistant interior material. The material comprises a porous base material layer, a fluorine-containing polymer and organic silicon resin blended oil-resistant functional layer and a micro-nano structure layer with a periodic micro-bulge array, surface modified nanoparticles are distributed in the functional layer in a gradient manner, and the micro-bulge surface is covered with a perfluoropolyether / fluorinated silicon dioxide composite coating; through a synergistic effect of a low-surface-energy oleophobic interface formed through chemical bonding and curing and a micro-structure capillary lifting effect, anti-permeation barrier of high-viscosity grease is realized, and meanwhile, mechanical wear resistance and thermal stability are improved by virtue of a nano-particle enhanced cross-linked network; and continuous imprinting and an ultraviolet-thermal dual-curing process are combined to achieve high-efficiency manufacturing with zero solvent residue, and finally the interior material with long-acting oil resistance, high environmental tolerance and industrial mass production feasibility is obtained.

The invention discloses a high-temperature-resistant, bending-resistant and high-flexibility polyimide film for flexible display and a preparation method of the high-temperature-resistant, bending-resistant and high-flexibility polyimide film. According to the polyimide film, by introducing the nano silicon dioxide particles and constructing the porous structure design, the problems that a traditional polyimide film is insufficient in stability in a high-temperature environment, cracks are likely to be generated after bending, and the flexibility is poor are effectively solved. The polyimide film disclosed by the invention is prepared by adopting a diamine monomer and a dianhydride monomer as main raw materials, adding nano silicon dioxide particles, and carrying out solution polymerization, gelation, pore regulation and control and thermal imidization processes. The obtained polyimide film has a micron-sized porous structure, keeps stable at a high temperature of 400 DEG C, does not generate cracks after being bent for 100,000 times, has tensile strength of more than or equal to 150MPa, elongation at break of more than or equal to 25% and light transmittance of more than or equal to 85%, and is suitable for a substrate material of a flexible display device.

The invention discloses a polyacrylamide blended high-performance PEO-based solid electrolyte and a preparation method thereof, and belongs to the technical field of sodium metal battery solid electrolyte materials. The preparation method comprises the following steps: mixing and stirring PEO, NaTFSI and polyacrylamide according to a certain ratio in acetonitrile to obtain slurry of a PEO-based solid electrolyte; carrying out vacuum filtration on the bacterial cellulose precursor solution and then drying; and coating the bacterial cellulose supporting layer with the PEO slurry, drying, and carrying out hot pressing on the obtained membrane. According to the PEO-based solid electrolyte, PAM contains a large amount of-NH2 anchoring anions, and C = O promotes sodium ion transfer, so that the ionic conductivity of the PEO-based solid electrolyte is effectively improved; meanwhile, bacterial cellulose is introduced as a supporting layer, and the polyacrylamide blended high-performance PEO-based solid electrolyte which is ultrathin, high in mechanical strength and high in ionic conductivity is prepared through a simple coating and hot pressing technology.

The invention relates to the technical field of preparation of medical supplies, in particular to a surgical membrane and a preparation process. During specific use, firstly, a polyurethane base membrane is selected and subjected to plasma treatment; spraying a nano SiO2 dispersion liquid containing a photoinitiator on the surface of the treated polyurethane base film, and then performing ultraviolet patterning irradiation to form a micro-bulge structure to obtain a base material layer; projecting the colloidal fluid to a temperature gradient mask through a digital micromirror device, so that the colloidal fluid is subjected to regional thermal polymerization on the substrate layer to form an intelligent adhesive layer with viscosity gradient; by adopting an aerosol jet printing technology, super absorbent fibers and polyvinyl alcohol-borax dynamic crosslinking hydrogel are co-deposited to form a drainage layer, so that the technical problems that a surgical membrane prepared by a surgical membrane preparation mode in the prior art is inflexible in adhesion and poor in surface structure performance, and a preparation process is difficult to accurately control are solved.

The invention discloses a polyetherketoneketone high-temperature-resistant wear-resistant non-stick coating and a preparation method thereof. The coating is prepared from the following components in parts by mass: 13 to 30 parts of a resin matrix group (containing 12 to 25 parts of titanium modified polyether ketone ketone resin, 1 to 5 parts of fluorine-free viscous resin and 0.65 to 6 parts of aluminum oxide), 0.5 to 3 parts of a nano reinforced group (containing 0.5 to 3 parts of KH-550 modified nano titanium dioxide, 0.025 to 0.6 part of cerium dioxide and 0.5 to 3 parts of boron nitride) and 62 to 71 parts of an auxiliary agent group. The preparation method comprises the following steps: 1) taking diphenyl ether, paraphthaloyl chloride and isophthaloyl chloride as monomers, and synthesizing titanium modified polyether ketone ketone resins with different viscosities through segmented polymerization (1.5-2.0 hours or 3.0-4.0 hours); 2) respectively preparing a smooth bottom layer water dispersion slurry and a wrinkled surface layer water dispersion slurry; and (3) forming a compact bottom layer and a micro-wrinkle surface layer on the base material by adopting a layered spraying and stepped sintering process (280-320 DEG C, 10-20 minutes). The whole system of the coating is fluorine-free and has temperature resistance gt; the coating has the characteristics of high temperature resistance (350DEG C), wear resistance (Taber wear rate of 3-5mg / 1000r), non-sticking (contact angle gt, 100 DEG C) and heavy corrosion resistance, and is suitable for cooking utensils and chemical equipment.

The invention discloses a composite diaphragm based on a solid electrolyte coating and a preparation method thereof. A modified polyaryletherketone polymer is prepared by using 3,3'-sodium disulfonate-4,4'-difluorobenzophenone, 4,4'-difluorobenzophenone, 2,2'-bis(4-hydroxyphenyl)hexafluoropropane and 4,4'-methylene-bis[2-(1H-benzimidazole-2-yl)]phenol as monomers, and the modified polyaryletherketone polymer is used as a polymer electrolyte, and an inorganic solid electrolyte is doped to prepare a composite diaphragm based on a solid electrolyte coating by a phase inversion method. The introduction of benzimidazole and fluorine-containing groups enhances the rigidity of the polyaryletherketone molecular chain, and the proton donor group on the benzimidazole ring generates hydrogen bonds with the main chain ether group or the side chain fluorine-containing group, so that the polyaryletherketone exhibits excellent mechanical properties and improves the tensile strength of the composite diaphragm; and the doping of the hydroxylated inorganic solid electrolyte makes the organic-inorganic solid electrolyte coating more tightly combined, further improving the ionic conductivity of the diaphragm.

The invention relates to the technical field of polyether-ether-ketone composite materials, in particular to a conjugated polythiophene-polyether-ether-ketone-based high-antibacterial coating and a preparation method thereof.The preparation method comprises the steps that hydroxyl modified boron nitride with photocatalytic capacity and aminated PEEK are subjected to melt blending to generate chemical bonding, and a BN-OH / PEEK-NH2 composite fine powder material is formed; then carrying out oxidative polymerization on the BN-OH / PEEK-NH2 composite fine powder and a thiophene monomer under the action of an oxidizing agent, carrying out in-situ synthesis to obtain a polythiophene / BN-OH / PEEK-NH2 conjugated composite material, and subsequently spraying the polythiophene / BN-OH / PEEK-NH2 conjugated composite material to the surface of a base material to prepare a composite coating with excellent antibacterial property, high thermal stability and low friction coefficient; the antibacterial rate of the coating on escherichia coli and staphylococcus aureus under illumination reaches 90% or above, and the coating is suitable for the medical antibacterial field.

The invention belongs to the technical field of waterproof materials, and particularly relates to a silane modified polyether waterproof coating and a preparation method for improving hydrophobicity of the silane modified polyether waterproof coating. The silane modified polyether waterproof coating is prepared from the following raw materials in parts by weight: 25 to 40 parts of polyether polyol, 40 to 50 parts of solid filler, 15 to 20 parts of plasticizer, 0.5 to 1.5 parts of silane end-capping reagent, 0.5 to 2 parts of silane coupling agent, 1 to 2 parts of water removal agent, 0.3 to 1 part of dispersing agent, 0.3 to 1 part of light stabilizer, 0.3 to 1 part of ultraviolet absorbent and 0.1 to 1 part of catalyst. The polyether polyol is obtained by random copolymerization of epoxypropane and epoxybutane, and the molecular weight of the polyether polyol is 8000-20000 g / mol. The silane modified polyether waterproof coating provided by the invention has good hydrophobicity and good mechanical strength, and meets the requirements on high-performance and environment-friendly waterproof coatings. The invention also provides a preparation method for improving the hydrophobicity of the polyether waterproof coating.

The invention discloses a metal temporary protective film and a preparation method and application thereof, and the metal temporary protective film comprises the following components by weight: 20-90 parts of hydrophilic acrylate resin; 5 to 50 parts of a hydrophilic UV monomer; 0-50 parts of a filler; 0-10 parts of a thixotropic agent; 1 to 10 parts of a photoinitiator; 0.01-1 part of a dispersant; 0.01 to 1 part of a defoaming agent; 0-20 parts of an adhesion promoter; 0.01 to 5 parts of a polymerization inhibitor; and 0-20 parts of starch. The metal temporary protective film has the characteristics of high binding force and easy film stripping after being cured, so that the metal temporary protective film has the effects of inhibiting wiredrawing and protecting the surface during metal machining, can be soaked in tap water for stripping, and can realize rapid film stripping without being soaked in alkaline water, acid water and an organic solvent.

The invention relates to a self-repairing hydrogen barrier composite coating for a hydrogen storage or transportation device as well as a preparation method and application of the self-repairing hydrogen barrier composite coating, and belongs to the technical field of hydrogen energy storage and transportation materials. The coating is of a double-layer structure and is composed of a bottom coating and a humidity response microcapsule self-repairing barrier layer. The humidity response microcapsule is composed of a capsule core containing a polyurethane prepolymer and a hybrid capsule shell formed by polyurethane and siloxane, and has good hydrogen barrier performance and environmental response characteristics. In a certain humidity environment, the microcapsule is stimulated to release the capsule core material, and in-situ self-repairing is achieved. The problem that a traditional hydrogen-resistant coating is short of repairing capacity is solved, and the hydrogen-resistant coating has a wide application prospect in the aspect of improving the safety of a hydrogen conveying and storage system.

The invention relates to the technical field of semiconductor processing, in particular to a coating liquid for protecting a wafer, a preparation method of the coating liquid and an organic protective film. 20 to 30 wt% of a polyvinyl alcohol compound; and 0.5-5 wt% of a polyethylene glycol compound. The organic protective film is prepared from the coating liquid. The organic protective film prepared by adopting the coating liquid can be tightly attached to the surface of a wafer, has no defects such as bubbles and wrinkles, can effectively isolate pollutants and mechanical damage in the processing process, has good dimensional stability in the processing process, is matched with the characteristics such as the thermal expansion coefficient of the wafer, and has a good application prospect. Stress generated between the protection film and the wafer due to size change is avoided, and the protection effect and subsequent tearing of the organic protection film are not affected.

The invention provides a low-surface-energy macromolecular photoinitiator, a UV (ultraviolet) LED (light-emitting diode) photocureable coating and a photocureable skin-touch coating. The low-surface-energy macromolecular photoinitiator comprises an ultraviolet light initiator chain segment, a coinitiator amine molecular chain segment, a low-surface-energy chain segment and a functional end group which are arranged repeatedly, and the ultraviolet light initiator chain segment, the coinitiator amine molecular chain segment, the low-surface-energy chain segment and the functional end group are randomly connected through single bonds. The low surface energy chain segment comprises one or more of C1-C30 divalent alkyl and divalent siloxy which are partially substituted or completely substituted by fluorine atoms; the amine molecular chain segment of the co-initiator can be used as a hydrogen donor of an ultraviolet light initiator chain segment, so that the photo-initiation efficiency can be improved; due to the introduction of the low-surface-energy chain segment, the low-surface-energy macromolecular photoinitiator has a certain migration ability, self-assembly can occur on the surface of a coating after film coating, the oxygen isolation ability is improved, and a skin feeling layer is formed through illumination; the functional end group participates in thermocuring, so that the mechanical property of the coating is improved.

The invention discloses a monoether amine modified nonionic waterborne epoxy emulsion as well as preparation and application thereof, and belongs to the field of waterborne industrial anticorrosive coatings. The monoether amine modified nonionic waterborne epoxy emulsion is prepared from the following raw materials: E-20 epoxy resin, dipropylene glycol monomethyl ether, ethylene glycol monobutyl ether, monoether amine, propylene glycol monomethyl ether, a nonionic epoxy emulsifier and deionized water. The nonionic waterborne epoxy emulsion disclosed by the invention is prepared by modifying monoether amine and emulsifying by adopting a nonionic emulsifier, and the prepared nonionic waterborne epoxy emulsion is uniform in appearance, free of mechanical impurities, less than or equal to 0.50 mu m in particle size and 7-8 in pH value.

The invention belongs to the technical field of coatings, and particularly relates to a composite coating based on modified hydrogenated bisphenol A epoxy resin and a preparation method thereof, the composite coating comprises the following components in parts by weight: a component A and a component B, the component A is prepared from the following components in parts by weight: 48 to 52 parts of amine curing agent, 25 to 30 parts of modified filler, 0.4 to 0.9 part of flatting agent and 0.2 to 0.6 part of defoaming agent; and the component B comprises the following components in parts by weight: 65-70 parts of hydrogenated bisphenol A epoxy resin, 15-20 parts of auxiliary resin and 1-3 parts of an emulsifier. The prepared composite coating is excellent in comprehensive performance and suitable for preparing industrial terraces.

This anti-fogging agent contains: silica particles; a silane coupling agent X having a reactive group X; and a polyether compound Y having at least two reactive groups Y capable of reacting with the reactive group X and bonding thereto.

A method of making a silver-silicalite coating on a surface of a stainless-steel substrate is provided. The method includes mixing metakaolin with an aqueous solution of NaOH to form a first mixture. The method further includes mixing silica gel and silver nitrate with the first mixture to form a second mixture. Furthermore, the method includes mixing Zeolites Socony Mobil-5 (ZSM-5) with the second mixture to form a third mixture. The method further includes hydrothermally treating the stainless-steel substrate with the third mixture to form the silver-silicalite coating on the surface of the stainless-steel substrate. The hydrothermal treatment is carried out in the absence of an organic template. The stainless-steel substrate coated with the silver-silicalite coating, prepared by the method of the present disclosure, has lower corrosion in comparison to the same stainless-steel substrate without the silver-silicalite coating.

Provided is a paint composition that can be easily manufactured and provides a cured film having excellent hardness, chemical resistance, antifouling properties, and weather resistance, the paint composition comprising:100 parts by mass of (A) one or more polyols selected from acrylic polyols, polyester polyols, and polyether polyols;0.5 to 20 parts by mass of (B) a silane coupling agent having an isocyanurate skeleton; and5 to 100 parts by mass of (C) an organopolysiloxane represented by formula (I)(SiO4 / 2)a(R1SiO3 / 2)b(R12SiO2 / 2)c(R13SiO1 / 2)d(R2O1 / 2)e  (I)(wherein, each R1 independently denotes a substituted or unsubstituted C1-12 monovalent hydrocarbon group, R2 denotes a hydrogen atom or a C1-6 alkyl group, a, b, c, and d are numbers satisfying 0≤a≤1, 0≤b≤1, 0≤c≤0.5, 0≤d≤1, a+b+c+d=1, and 0.5<(a+b)≤1, and e is a number satisfying 0<e≤4).

The invention relates to the field of paint coatings, in particular to an anti-fog coating for a vehicle-mounted camera. The anti-fog coating for the vehicle-mounted camera is prepared from the following raw materials in parts by mass: 45 to 60 parts of resin material, 10 to 20 parts of methyl vinyl silicone rubber, 10 to 15 parts of microcapsule, 20 to 35 parts of humidity control powder, 15 to 25 parts of functional filler, 5 to 10 parts of cross-linking monomer, 3 to 5 parts of cross-linking aid, 5 to 8 parts of foaming agent, 3 to 4 parts of antibacterial agent, 2 to 4 parts of ultraviolet-resistant agent, 1 to 2 parts of initiator, 2 to 4 parts of catalyst and 8 to 15 parts of aid. The anti-fog coating for the vehicle-mounted camera, provided by the invention, not only has excellent anti-fog performance, but also ensures good aging corrosion resistance and the like of the anti-fog coating, can ensure the performance stability of the anti-fog coating in a long-term high-temperature and high-humidity environment, avoids the moisture absorption saturation phenomenon of the existing anti-fog coating in the long-term high-temperature and high-humidity environment, and improves the anti-fog performance of the vehicle-mounted camera. Therefore, the anti-condensation effect under the normal use condition is ensured.

A compound including the following Group 1, a partial structure that is an alkylene chain or a polyalkylene oxide chain, and the following Group 2: Group 1: -SiR13 Group 2: - Si(R2)nL3-n where each of pieces of R1 independently represents a hydrocarbon group or a trialkylsilyloxy group, each of pieces of R2 independently represents a hydrocarbon group, each of pieces of L independently represents a hydrolyzable group or a hydroxyl group, and n is an integer from 0 to 2.

To provide an anisotropic conductive film which exhibits low temperature quick curability, and good adhesive strength and connection reliability, and can be stably slit in a narrow width.SOLUTION: An anisotropic conductive film has such a structure that a radical-polymerizable conductive particle-containing resin layer is laminated on a radical-polymerizable / anionic polymerizable insulating resin layer. The insulating resin layer contains: a radical polymerization initiator containing a film-formation component containing two kinds of phenoxy resins having different molecular weights, a radical-polymerizable component containing a first acrylic compound, an anionic polymerizable component containing an epoxy-based compound and an organic peroxide having a one-minute half-life temperature of 125°C or lower; and an anionic polymerization curing agent containing an organic acid hydrazide compound having a melting point of 160°C or lower. The conductive particle-containing resin layer contains a radical polymerization initiator containing a film-formation component containing a third phenoxy resin, a radical-polymerizable component containing a second acrylic compound, conductive particles and an organic peroxide having a one-minute half-life temperature of 125°C or lower.SELECTED DRAWING: Figure 1

According to the preparation method of the high-temperature-resistant durable super-hydrophobic powder coating, integrated powder coating particles are prepared by mixing through a tabletting-crushing-sieving technology, and finally, one end of a solid nano-material in the integrated powder coating particles is embedded into a bottom layer, and the other end of the solid nano-material protrudes out of the surface of the coating, so that a nano-fiber bridging interface strengthening structure is formed. According to the invention, the low surface energy material, the solid nano material and the thermoplastic film-forming resin are effectively combined together to construct firm and stable integrated powder coating particles, so that the overall performance is synergistically enhanced, and the protection capability of a micron-scale structure to a nano-scale structure is greatly improved; the solvent-free durable super-hydrophobic powder coating is directly prepared through electrostatic spraying, so that the technological process is simplified; the solid, solvent-free and environment-friendly super-hydrophobic powder coating is prepared, has excellent high-temperature resistance and super-hydrophobic performance, and has potential advantages in the aspect of anti-corrosion and anti-drag application of a heat distribution pipeline.

The present invention relates to a cooking element (1) comprising a metal support (2) that comprises an inner face (21) suitable for receiving food and an outer face (25), wherein the inner face (21) is coated with a coating (5) that consists, successively from the support (2), of an underlayer (3) and a surface coating (4), characterised in that the underlayer (3) takes the form of a discontinuous layer, is formed from one or more materials selected from the group consisting of Al2O3-TiO2, Al2O3-SiO2, Al2O3-ZrO2, Al2O3 and mixtures thereof, and has open pores across all or some of the thickness of the underlayer, wherein the open pores account for 20% to 70% by volume of the volume of the underlayer (3), and wherein the open pores are filled with the surface coating (4) to between 40% and 100% by volume, and in that the surface coating (4) penetrates into the thickness of the underlayer (3) to a depth of at least 30% relative to the thickness of the underlayer (3).

This application discloses a negative electrode composition, a negative electrode slurry, a negative electrode plate, a secondary battery, and an electrical device containing the secondary battery. The negative electrode composition includes a negative active material and a plasticizer. The plasticizer includes a polyether polyol. The negative electrode composition of this application can effectively reduce the risk of cracking of the negative electrode film layer, improve electrolyte wettability of the negative electrode plate, and in turn, improve the energy density, cycle performance, and C-rate performance of the secondary battery.