1098results about "Powdery paints" patented technology

The invention relates to an insulating weather-resistant powder coating and a preparation method thereof, and belongs to the technical field of coatings, and the powder coating comprises composite modified resin, a dual curing agent, a functional filler, a polyacrylate leveling agent, fumed silica, a benzotriazole ultraviolet light absorber, polytetrafluoroethylene wax powder and the like. A core-shell structure of the composite modified resin is designed, high insulativity is kept through a silane modified epoxy core layer, a weather-proof barrier is provided through an acrylic acid shell layer, and the phase separation problem is solved through interface chemical bonding; a dual-curing mechanism is designed, and isocyanate and acrylic hydroxyl react to form an interpenetrating network while an epoxy core layer is cured by anhydride; a filler synergistic effect is designed, silane coupling agent modified nano boron nitride forms a three-dimensional heat-conducting insulating network, and rutile type titanium dioxide is coated with silicon dioxide, so that ultraviolet aging is resisted. All the components cooperate with one another, so that the coating has excellent insulativity, weather resistance, adhesiveness and the like at the same time.

The invention discloses a temperature-resistant high-strength powder coating and a preparation method thereof, and belongs to the field of coatings. The invention relates to a temperature-resistant high-strength powder coating which is prepared from the following raw materials in percentage by weight: 40-50% of epoxy resin; 20-30% of polyester resin; 6-10% of a curing agent; 1-3% of a leveling agent; 1-2% of a filler; and the balance of pigment. According to the polyester resin, aliphatic diisocyanate reacts with polyether polyol and hydroxyl silicone oil to obtain a polyurethane prepolymer, and then the polyurethane prepolymer reacts with vinyl benzylamine, an acrylate monomer and an acrylic monomer to obtain the polyester resin. The powder coating has the advantage that the temperature resistance and the strength of the powder coating are improved.

The invention relates to the technical field of insulating materials, in particular to insulating powder and a preparation method thereof. The invention discloses a flame-retardant coating which comprises the following components in parts by weight: 15-25 parts of epoxy resin, 10-20 parts of aluminum hydroxide, 5-12 parts of nano boron nitride, 1-3 parts of a silane coupling agent KH-560, 3-8 parts of polytetrafluoroethylene micro powder, 2-6 parts of fluorine-modified montmorillonite, 4-9 parts of melamine cyanurate, 2-5 parts of nano titanium dioxide, 1-4 parts of a fluorine-modified graphene oxide-polyaniline composite material and 0.5-2 parts of pentaerythritol stearate. The anti-corrosion coating is prepared from the following components in parts by weight: 1 to 3 parts of nano zinc oxide, 5 to 10 parts of glass fiber, 2 to 5 parts of polyhedral oligomeric silsesquioxane-polyimide copolymer, 1 to 4 parts of ferrocenyl epoxy resin and 0.5 to 2 parts of perfluorooctyltriethoxysilane. The insulation powder is high in corrosion resistance, excellent in insulation, heat dissipation and mechanical performance, environmentally friendly in processing, good in adaptability, capable of prolonging the service life of equipment and reducing the cost, suitable for special environments and wide in popularization prospect.

The invention discloses a flame-retardant insulating powder coating for a new energy automobile and a preparation method of the flame-retardant insulating powder coating, and belongs to the technical field of coatings. The flame-retardant insulating powder coating for the new energy automobile is prepared from the following raw material components in parts by mass: 380 to 384 parts of epoxy resin, 56 to 58 parts of a toughening agent, 5 to 10 parts of modified flame-retardant filler, 100 to 101 parts of a composite curing agent, 5 parts of a flatting agent, 1 part of benzoin and 0.7 part of an accelerant, the toughening agent is obtained by carrying out a reaction on an isophorone diisocyanate tripolymer, 4-bromophenol and N-p-coumaroyl tyramine; the modified flame-retardant filler is obtained by firstly wrapping hexagonal boron nitride with polydopamine and then modifying with a silane coupling agent; the silane coupling agent is obtained by combining 4-benzonitrile oxygen butyl trimethoxy silane and a sulfydryl silane coupling agent; and the composite curing agent is obtained by combining 4, 4-diaminodiphenylmethane and amino-sulfydryl functional organic polysiloxane.

The invention discloses a wear-resistant and high-temperature-resistant fluorocarbon powder coating and a preparation method thereof. Comprising the following steps: step 1, adding FEVE resin, a modified filler, a curing agent, a flatting agent and an antioxidant into a high-speed mixer, and mixing for 10-15 minutes until the materials are uniform to obtain a mixed raw material; and 2, transferring the mixed raw material into an extruder, extruding, tabletting, cooling, crushing, and screening with a standard sieve to obtain the fluorocarbon powder coating. The preparation method has the beneficial effects that the modified chitosan and the montmorillonite are compounded, the cerium salt is adopted for further modification, and after the obtained modified filler is added into a coating component, the wear resistance and the high-temperature resistance of a coating are remarkably improved.

The invention provides a preparation method of silicon dioxide serving as a flow promoter in a powder coating. The preparation method comprises the following steps: synthesizing silicon dioxide by using a precipitation method; washing and filter-pressing to obtain a precipitate; re-dispersing and pulping the silicon dioxide by using pure water; performing drying; performing high-temperature crushing; the synthesis of silicon dioxide comprises the following steps: adding bottom water, and heating to 40-100 DEG C; adding water glass and acid into the bottom water in a parallel flow manner under the conditions of constant temperature and pH value of 5.0-10.0; adjusting the pH value to 2.0-4.0 by using an acid; the specific surface area of the silicon dioxide is 100-500m < 2 > / g; the bulk ratio of the silicon dioxide is not higher than 0.30 g / cm < 3 >; the particle size of the silicon dioxide is not higher than 5.0 microns; the methanol value of the silicon dioxide is higher than 30%; the drying weight loss of the silicon dioxide is not higher than 3.0%. The preparation method of the silicon dioxide serving as the flow promoter in the powder coating is simple in process and low in cost.

The invention discloses a high-adhesiveness corrosion-resistant powder coating and a preparation method thereof, and belongs to the technical field of coatings. The powder coating is prepared from the following raw materials: modified epoxy resin, composite modified filler, a curing agent, a flatting agent, a dispersing agent, benzoin, sodium fluoride and the like. The epoxy resin is modified, amino is introduced to enhance the interaction with the grafted phosphate nano-silica, and BYK-163 is introduced, so that the compatibility is improved. In the composite modified filler, nano silicon dioxide A is grafted with a phosphate group, and can form a chemical bond with metal and quickly form a passive film; the nano silicon dioxide B is grafted with a fluorine-containing group, so that the coating is endowed with low surface energy and chemical stability, and long-acting protection is realized. Sodium fluoride destroys metal lattices at high temperature to form anchor points, and adhesive force is improved. The problem that a traditional powder coating is insufficient in adhesive force and corrosion resistance is solved, and the powder coating is suitable for metal protection in various complex environments and has wide application prospects.

Methods and systems for coating metal substrates are provided. The methods and systems include sequential application of low flow and high flow powder coatings followed by a single heating step to provide a cured coating. The methods and systems include a marker that allows coating uniformity to be monitored and assessed during application. The described methods provide coatings with optimal surface smoothness and edge coverage.

The invention provides high-water-resistance high-toughness light-transmitting acrylic acid powder resin as well as a preparation method and application thereof, and belongs to the technical field of powder resin. The high-water-resistance high-toughness light-transmitting acrylic acid powder resin is prepared from the following preparation raw materials in parts by mass: 100 parts of an organic solvent; 20 to 50 parts of methyl (meth) acrylate; 5 to 20 parts of (methyl) butyl acrylate; 1 to 15 parts of tert-butyl (meth) acrylate; 10 to 50 parts of an epoxy group raw material; 1-20 parts of vinyl versatate; 0 to 30 parts of styrene; 1-10 parts of an acrylate monomer containing two double bonds; 0-5 parts of reactive silicon dioxide powder; 0-5 parts of a single-ended reactive silicon monomer; 0-5 parts of a double-end reactive silicon monomer; 0.1 to 2 parts of a silane coupling agent; 0.1 to 8 parts of an initiator; and 0.1-5 parts of a chain transfer agent. The light-transmitting acrylic powder resin with high water resistance and high toughness has excellent water resistance and toughness and good light transmittance.

The invention discloses a high-corrosion-resistance powder coating and a preparation method thereof, and belongs to the technical field of powder coatings. Through modification of the resin system, the ultraviolet absorbent modified epoxy resin and the weather-resistant polyester resin are compounded, so that the ultraviolet resistance and the weather resistance of the resin system are remarkably improved, and the corrosion resistance reduction caused by light aging is avoided; the flake graphene forms an excellent physical barrier to block corrosion medium permeation, then chemical passivation of zinc phosphate is combined to inhibit electrochemical corrosion, the synergistic effect is achieved, the corrosion resistance is synergistically enhanced from the physical and chemical angles, the path of the corrosion medium is further prolonged in combination with the laminated structure of the glass flakes, and the corrosion resistance is improved. And meanwhile, the filler A and the filler B can also play a role in enhancing the mechanical strength of the coating, so that the powder coating with high corrosion resistance can be obtained on the whole.

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

The present invention discloses a fireproof insulating powder coating and a preparation method and application thereof, and belongs to the technical field of coatings. The fireproof insulating powder coating provided by the present invention comprises the following raw materials in parts by mass: 50 to 250 parts of silicone modified epoxy resin, 50 to 250 epoxy resin, 1 to 60 parts of curing agent, 1 to 20 parts of accelerator, 100 to 300 parts of filler, and 50 to 350 parts of auxiliary agent; the curing agent comprises a modified dicyandiamide curing agent; the modified dicyandiamide curing agent contains at least one of an aromatic group, an amino group or an epoxy group. The modified dicyandiamide curing agent of the present invention has excellent flame retardant and heat resistant properties, and has good curing reaction activity with epoxy resin, which is beneficial to improving the fireproof and heat resistant properties of the coating; at the same time, by compounding it with silicone modified epoxy resin and epoxy resin, it can work together to obtain a powder coating with excellent fireproof and insulating properties, which has a wide range of applications in battery protection.

The present invention belongs to the technical field of coatings. More specifically, it relates to a high temperature resistant powder coating and a preparation method thereof. The product of the present invention comprises a polyester resin, a curing agent and a filler; the filler comprises modified graphene oxide; the modified graphene oxide comprises a graphene oxide matrix, and monodisperse hollow nanoparticles embedded in the interlayer of the graphene oxide matrix; the monodisperse hollow nanoparticles are selected from any one of monodisperse hollow nanoalumina, monodisperse hollow nanosilicon dioxide, monodisperse hollow nanomagnesia, monodisperse hollow nanozinc oxide, and monodisperse hollow nanotitanium dioxide; the D50 of the monodisperse hollow nanoparticles is 3-5nm; the particle size distribution range of the monodisperse hollow nanoparticles is 1-10nm; the sphericity of the monodisperse hollow nanoparticles is 9.0-9.2; the D50 of the graphene oxide matrix is ​​10-20μm.

The invention discloses a special uniform curing powder coating for suction coating of the inner wall of a pipe fitting and a coating method of the special uniform curing powder coating, relates to the technical field of pipeline anti-corrosion coatings, and aims to solve the problem that the whole anti-corrosion performance of the pipe fitting does not reach the standard due to non-uniform coating and incomplete curing in the coating of the inner wall of the existing pipe fitting. The paint is composed of 400 g of one-step epoxy resin, 200 g of two-step epoxy resin, 80 g of a curing agent, 10 g of an auxiliary agent, 28 g of pigment, 3 g of an accelerant and 279 g of filler. The epoxy value of the one-step method epoxy resin is 0.4 to 0.5 eq / 100g; the epoxy value of the two-step method epoxy resin is 0.1 to 0.2 eq / 100g; the curing agent is an amine curing agent, and a microcapsule type latent accelerator accounting for 5-10% of the mass of the curing agent is dispersed in the curing agent. The powder coating has the advantages that the flowability and the leveling property of the powder coating are effectively adjusted, the sagging phenomenon is reduced, the curing time is shortened, and uniform curing is ensured.

The invention relates to the technical field of coatings, and provides a corrosion-resistant flame-retardant powder coating and a preparation method thereof. The corrosion-resistant flame-retardant powder coating is prepared from the following raw materials in parts by weight: 45 to 55 parts of epoxy resin, 15 to 25 parts of polyimide resin, 10 to 12 parts of modified nano aluminum oxide, 6 to 8 parts of nano calcium silicate, 2 to 3 parts of graphene nanosheets, 8 to 10 parts of expanded graphite, 18 to 22 parts of polyamide curing agent, 2 to 4 parts of silane coupling agent, 1 to 1.4 parts of flatting agent and 0.5 to 1.5 parts of dispersing agent. 0.5 to 0.7 part of an antioxidant; and 0.5 to 1.5 parts of an imidazole accelerant. The core of the invention lies in that the corrosion resistance and flame retardancy of the coating are remarkably improved through accurate proportioning and a preparation process; meanwhile, the preparation method is simple in process, low in cost and environment-friendly, and large-scale production is easy to realize.

The invention discloses an epoxy powder coating and a preparation method thereof, and belongs to the technical field of powder coating production, firstly, the epoxy powder coating is prepared from the following raw materials in parts by mass: 100 parts of epoxy resin, 15-20 parts of modified phenolic resin, 12-15 parts of carboxyl-terminated polyester resin, 4-8 parts of nano cerium oxide coated mica, 1.5-2.0 parts of a flatting agent and 0.5-1.0 part of benzoin; the modified phenolic resin is prepared by carrying out addition on bisphenol A phenolic resin and DOPO, neutralizing and carrying out reduced pressure distillation; the carboxyl-terminated polyester resin is prepared by carrying out esterification polycondensation on terephthalic acid, isophthalic acid, neopentyl glycol and trimethylolpropane, and then modifying by trimellitic anhydride; the nano cerium oxide coated mica is prepared by coating white mica powder with cerium oxide precipitate, and then carrying out surface treatment and crushing.

The invention relates to the technical field of high polymer materials, and discloses self-repairing bio-based polyester resin for a matte powder coating as well as a preparation method and application of the self-repairing bio-based polyester resin. The bio-based polyester resin is prepared from the following preparation raw materials in percentage by mole: 20 mol% to 40 mol% of bio-based flexible diol, 20 mol% to 35 mol% of bio-based furandicarboxylic acid, 10 mol% to 25 mol% of isosorbide, 5 mol% to 25 mol% of itaconic acid, 1 mol% to 15 mol% of long-chain bio-based aliphatic dibasic acid, 1 mol% to 10 mol% of bio-based citric acid, 0.1 mol% to 2.0 mol% of zinc acetylacetonate, 0.1 mol% to 1.0 mol% of a microcapsule corrosion inhibitor, 0.1 mol% to 1.0 mol% of an esterification catalyst and 0.1 mol% to 1.5 mol% of an antioxidant. The bio-based polyester resin does not contain petroleum-based monomers and is high in biochar content.

The invention discloses a powder coating imitation copper wire drawing coating based on a gradient composite structure and a preparation method of the powder coating imitation copper wire drawing coating, and relates to the technical field of novel printing ink. The invention relates to a gradient composite structure-based powder coating copper-wire-drawing-imitating coating, which is characterized by comprising a bottom layer, a middle layer and a surface layer, wherein the bottom layer is an epoxy resin-based powder coating layer containing nano silicon dioxide; the middle layer is a copper-imitating ink wiredrawing layer containing micro-nano copper powder in directional arrangement; the surface layer is a water-based gloss oil layer containing a self-repairing flatting agent; wherein the bottom layer is formed by electrostatic spraying. Through the gradient composite structure design of the bottom layer, the middle layer and the surface layer, the coating provided by the invention shows remarkable advantages in the aspects of hardness (4H), salt fog resistance (more than 1000 hours), self-repairing property and the like, and overcomes the limitation that the traditional coating is insufficient in adhesive force and hard to consider both hardness and wear resistance.

The present invention relates to a matting agent for HAA powder coatings and a preparation method thereof. The matting agent is a matting polymer containing special groups such as hydroxyl and epoxy groups with significantly different activities. The matting polymer is mainly prepared from glycidyl methacrylate, methyl methacrylate, butyl acrylate, 5-norbornene-2-methanol, 2-methyl-3-butene-2-ol, dicyclopentadiene dioxide, a hydroxyl polyester resin, and an accelerator. Due to the presence of hydroxyl and epoxy groups of varying activities in its structure, supplemented by the accelerator and the physical dispersion effect during the preparation process, the product has excellent matting ability and good storage and matting stability. It can reduce the gloss of HAA system powder coatings to 3-10%.

The present disclosure relates to a powder coating composition for preparing a dielectric coating, comprising: a) an epoxy-functional polymer; b) a polycarboxylic acid-functional polyester polymer capable of reacting with the epoxy-functional polymer; and c) optionally a colorant; wherein (i) the coating composition further comprises an isocyanate-functional crosslinker capable of reacting with a hydroxyl-functional reaction product obtained from the epoxy-functional polymer and the polycarboxylic acid-functional polyester polymer; and / or (ii) a film formed from the powder coating composition has a dielectric strength greater than 2.5 kV at a dry film thickness of less than 8 mils; and the powder coating composition is substantially free of polycarboxylic acid-functional (meth)acrylate polymers.

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 invention discloses a high-weather-resistance fluorocarbon powder coating as well as a preparation method and application thereof in the field of functional polymer materials. The coating disclosed by the invention takes a fluorine-containing polyurethane grafted polytetrafluoroethylene copolymer and phosphorus-silicon synergistic modified nano clay as core modification components. Wherein the fluorine-containing polyurethane grafted polytetrafluoroethylene copolymer is polymerized with monomers such as fluorine-containing diol and isocyanate through a polytetrafluoroethylene emulsion under the protection of nitrogen to form a fluorocarbon-polyurethane double-main-chain structure, so that the crosslinking density and the photooxidation resistance are improved; phosphorus-silicon synergistic modified nano clay is subjected to interlayer intercalation, phosphorus source modification and silane coupling agent treatment to form a physical barrier layer, enhance interface bonding and hinder water vapor permeation. The formula of the coating further comprises an HDI tripolymer curing agent, rutile type titanium dioxide and other pigments and fillers and auxiliaries. The preparation method comprises the following steps: premixing all the components, extruding by double screws, tabletting and crushing, and carrying out jet milling. The product can be applied to the surface of a metal workpiece, and the weather resistance of the product in an extreme environment is remarkably improved.

The invention provides a powder coating with good high-temperature resistance, a high-temperature-resistant coating and a preparation method, and belongs to the field of high-temperature-resistant coatings. The powder coating is composed of a prime coating, a middle coating and a surface coating, the prime paint is prepared from the following chemical components: 20 to 40 parts of organic silicon-epoxy-polyarylether sulfone ternary hybrid resin, 5 to 15 parts of boron nitride, 2 to 6 parts of KH-550 modified silicon carbide and 3 to 8 parts of Al2O3 coated SiO2 core-shell particles; the middle-layer coating is prepared from the following chemical components: 10 to 20 parts of polyimide-siloxane hyperbranched resin, 3 to 6 parts of Zr-Ti-V composite oxide and 1 to 4 parts of nano kaolinite / talcum powder compound; the surface layer coating is prepared from the following chemical components: 10 to 20 parts of organic silicon-epoxy-polyarylether sulfone ternary hybrid resin, 5 to 15 parts of silicon dioxide aerogel and 1 to 3 parts of ammonium polyphosphate / zinc borate compound. Therefore, the high-temperature resistance, the corrosion resistance and the mechanical property of the high-temperature-resistant coating are improved at the same time.

The invention relates to the technical field of polyester powder coatings, in particular to a preparation method of a polyester type antistatic powder coating. The method comprises the following steps: firstly, determining a flow inertia factor according to the viscosity of a pre-molten material and the heating condition among different sections; determining a thermal inertia factor according to the heat-conducting property of the pre-molten material, the influence of heated melting of the feeding particle size of the feeding in the melting section and the expected arrival time of the pre-molten material; matching the flow inertia factor sequence and the thermal inertia factor sequence to obtain a delay time difference; determining a state change factor of the pre-molten material according to the delay time difference, the viscosity of the pre-molten material and the propelling speed; according to the heat conduction performance and the state change factor of the pre-melted material, total energy fluctuation of the material in the time sequence due to unstable heat absorption is determined; and the optimal feeding speed is determined according to the change of the total energy fluctuation in the material propelling length. The material agglomeration probability can be reduced through the regulation and control strategy.

The application discloses a kind of high-performance coiled material powder coating and preparation method thereof, belong to powder coating technical field, the application is by the compounding of organosilicon modified epoxy resin and carboxyl-terminated polyester resin, after organosilicon modification, the segment of introduction-Si-O-Si in system has high flexibility, and synergistic effect with nano calcium carbonate, it is helpful to balance the adhesion and flexibility of coating, grafting modification graphene oxide, active chromium oxide is added again, can obviously improve the mechanical strength of coating;After then, phosphite group is grafted onto graphene oxide, and is applied in the present powder coating system, can form three-dimensional network structure in system, chemical bond effect, not only can improve its crosslinking stability in system, and the sheet structure of graphene oxide, also can play certain barrier property, can also give coating longer weather resistance, and active chromium oxide synergistic effect is further improved, and the weather resistance and corrosion resistance of coating.

The invention belongs to the technical field of coatings, and discloses a preparation method and application of a low-temperature fast-curing coiled material powder coating, and the preparation method comprises the following steps: S1, adding raw materials of the low-temperature fast-curing coiled material powder coating into a high-speed mixer, and mixing for 5-8 minutes at the rotating speed of 1200-1600r / min to ensure that the components are uniformly dispersed; s2, adding the mixture into a double-screw extruder for melt extrusion, wherein the temperature of the double-screw extruder is 80-90 DEG C in a first area, 100-110 DEG C in a second area, 120-130 DEG C in a third area and 110-120 DEG C in a fourth area, and the rotating speed is 200-250 r / min; s3, tabletting and cooling to 40 DEG C or below, after coarse crushing, adopting an ACM pulverizer and a grading screen of 80-120 meshes to obtain the low-temperature fast-curing coiled material powder coating, low-temperature curing and fast film forming are achieved through component cooperation, the process adaptability is high, meanwhile, functional filler modified sericite and modified nanometer aluminum oxide are added, and the low-temperature fast-curing coiled material powder coating is prepared. The two synergistically enhance the corrosion resistance, mechanical strength and environmental adaptability of the powder coating paint film.

The invention discloses a nano reinforcing agent for a modified epoxy powder coating and a preparation method of the nano reinforcing agent, and relates to the technical field of coating materials. According to the invention, through a core-shell-dendritic hybrid structure, different core materials are matched with a shell layer material, and chemical bond directional connection is adopted, so that the nano filler is uniformly dispersed, the problem of agglomeration of a traditional nano material is solved, and meanwhile, high thermal conductivity and antistatic synergism and efficient self-repairing capability are achieved, and a better electrostatic spraying effect is achieved; by adding the nano reinforcing agent with high strength and rigidity, the hardness, impact resistance and wear resistance of the coating can be remarkably improved, so that the service life of the coating is prolonged, and the stability of the coating is improved; due to the design of the nano reinforcing agent and surface functionalization treatment, the hydrophobicity and chemical stability of the coating can be improved, permeation of water and chemical substances is effectively prevented, the corrosion resistance of the coating is enhanced, and the service life of the coating is prolonged.

The invention discloses an environment-friendly powder coating as well as a preparation method and application thereof, belongs to the technical field of powder coating processing, and is used for solving the technical problem that the wear resistance, impact resistance and ultraviolet aging resistance of a powder coating in the prior art need to be further improved. The composite material comprises the following components in parts by weight: 70-80 parts of polyolefin resin, 15-25 parts of epoxy resin, 5-6 parts of a curing agent and 3-5 parts of an auxiliary additive, the polyolefin resin is prepared by reinforcing an unsaturated monomer through activated filler and olefin-terminated polysiloxane, and then the polyolefin resin is reinforced by the epoxy resin. According to the present invention, the wear resistance and the impact resistance of the paint film layer sample are effectively improved, the adhesion and the ultraviolet resistance of the paint film are improved, and the production process has low harm to the environment and the human health, and is environmentally friendly.

The present invention provides: a powder which is capable of forming an electromagnetic wave absorption layer that has electromagnetic wave absorption characteristics in a wider frequency region than ever before and is suppressed in performance variation, and which can be electrostatically adhered or heat fixed to a support body; and an electromagnetic wave absorber which comprises a melt molded body of the powder as an electromagnetic wave absorption layer. The present invention provides: a powder which is capable of forming an electromagnetic wave absorption layer that has electromagnetic wave absorption characteristics in a wider frequency region than ever before and is suppressed in performance variation, and which can be electrostatically adhered or heat fixed to a support body; and an electromagnetic wave absorber which comprises a melt molded body of the powder as an electromagnetic wave absorption layer.

The invention relates to organic silicon modified bifunctional polyester resin and a weather-resistant powder coating composition prepared from the organic silicon modified bifunctional polyester resin. Specifically, the silicone-modified bifunctional polyester resin has a molecular backbone derived from a polyol component, a polyacid component, a capping component, and a silicone component, in which the silicone-modified bifunctional polyester resin has an acid value in the range of 20 to 40 mg KOH / g, a hydroxyl value in the range of 5 to 15 mg KOH / g, and a hydroxyl value in the range of 5 to 15 mg KOH / g. The organic silicon component is organic silicon resin with a structure as shown in a formula (I). The weather-resistant powder coating composition disclosed by the invention has excellent weather resistance, such as QUVB of more than 500 hours, and also has excellent leveling property and high glossiness. (RSiO3 / 2) a (R2SiO2 / 2) b (R3SiO1 / 2) c (SiO4 / 2) d (XO1 / 2) e (HO1 / 2) g (I)