2055 results about "Powder coating" patented technology

The invention discloses an electrostatic powder coating control method, which relates to the technical field of powder coating control, and comprises the following steps: a PLC (Programmable Logic Controller) control system is combined with a position encoder and a sensor to realize synchronous follow-up spraying of a spray gun on a workpiece, and the spraying voltage, current and powder supply parameters are dynamically adjusted according to the powder resistivity and the deposition state; in the workpiece curing process, PID control is adopted to guarantee that the temperature and the conveying speed are stable, and after spraying, the spraying time and path are corrected in a closed-loop mode in combination with film thickness detection data; the control system further constructs a multi-objective optimization model, and dynamically adjusts the spraying strategy according to the film thickness consistency and the beat efficiency. The problems that in the traditional spraying process, a spray gun is rigid in path, parameters are fixed, and quality feedback is lagged are solved, and high-consistency, high-efficiency and high-adaptability intelligent coating control is achieved.

The invention discloses a real-time monitoring and feedback control system for enamel electrostatic powder coating, and relates to the technical field of industrial enamel coating. The system comprises a data acquisition and monitoring module, a feedback control decision module, an execution mechanism control module, a spraying path planning and adjusting module, a parameter optimization and adaptive adjustment module and a multi-target cooperative adjustment strategy module. The system builds a standardized state vector and recognizes abnormity by collecting spraying enamel electrostatic powder state parameters, deposition error signals and environment interference data, and closed-loop control and dynamic adjustment of spray gun electrode voltage, powder supply amount and spray gun path parameters are achieved. Intelligent algorithms such as particle swarm optimization are introduced to optimize a controller and process parameters, the coating uniformity and the deposition efficiency are automatically balanced in combination with a multi-target collaborative strategy, and stable spraying quality is achieved under complex working conditions. The method has the advantages of self-learning, self-adaption and expandability, and the intelligent level and the production performance of the enamel electrostatic powder spraying process are remarkably improved.

A patch panel comprises an exposed raised area or bump behind each patch panel opening that maintains electrical conductivity between the patch panel frame and a housing of a jack while the jack is installed in the opening. During the manufacturing process, this grounding bump can be masked from paint or powder coating so that the bare metal of the bump remains exposed, yielding a raised surface that readily makes conducive contact with the conductive casing of a jack installed in the patch panel opening without the need for an intermediate component that would normally be required to bridge the gap caused by paint or powder coat thickness.

The invention relates to the technical field of heavy anti-corrosion coatings, in particular to a graphene enhanced epoxy modified organic silicon resin heavy anti-corrosion powder coating. The coating is prepared from the following components in parts by weight: 42 to 58 parts of epoxidized epoxy modified organic silicon resin, 0.8 to 2.5 parts of hydroxylated graphene, 6 to 11 parts of nano zirconium dioxide coated boron nitride, 2.5 to 5.5 parts of lanthanum iso-octoate-titanate composite coupling agent, 1.5 to 3.5 parts of bis (3-triethoxysilylpropyl) disulfide, 4 to 7 parts of polyhedral oligomeric silsesquioxane, 5 to 8 parts of curing agent, 0.8 to 1.8 parts of flatting agent and 0.4 to 0.9 part of defoaming agent. 2.5 to 4.5 parts of polyether-ether-ketone micro powder and 1.2 to 2.8 parts of fluorine-containing phosphate ester. According to the invention, the resin is modified through chemical bridging, the modified graphene and the nano-coated powder are matched to construct a synergistic enhancement system, and the interface bonding is optimized by the composite coupling agent. The coating is excellent in adhesive force, corrosion resistance and mechanical property, good in processing fluidity and high in aging resistance and thermal stability, solves the problem that a traditional product is short in performance, and meets the industrial requirement.

The invention discloses a cyclone separator for collecting powder coating, and relates to the technical field of cyclone separators. Comprising a barrel, the outer side of the barrel is fixedly connected with a support, the outer side of the barrel is fixedly connected with a feeding pipe, a conical barrel is fixedly connected to the bottom of the barrel, a spiral plate is fixedly connected to the inner wall of the conical barrel, a spiral groove is formed in the inner wall of the conical barrel, a round hole is formed in the middle of the top of the barrel, and a supporting column is fixedly connected to the top of the barrel; the number of the supporting columns is multiple, the multiple supporting columns are evenly distributed with the discharging assembly as the center, the tops of the supporting columns are fixedly connected with a bearing plate, and the top of the bearing plate is fixedly connected with the motor. According to the cyclone separator for collecting the powder coating, a definite flowing path is provided for dust particles by arranging the spiral groove and the spiral flow guide groove, so that dust can move towards the dust discharging opening more smoothly, the accumulation and backmixing phenomena of the dust on the inner wall of the conical barrel are reduced, and the dust discharging efficiency and stability are improved.

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.

To provide a powder coating device that removes only fine powders that are difficult to attach to a coated object from a recovery powder circulation path, suppresses a ratio of fine powders contained in recovery powders, and has high adhesion efficiency.SOLUTION: A powder coating device performs coating by blowing a powdered paint A conveyed by conveyance air from a coating material tank 1 to a coated object W in a powder coating booth 6, and comprises a circulation path that recovers overspray powders which have not attached to the coated object W and returns the recovered recovery powders to the coating material tank 1. In the powder coating device, a fine powder removal device for removing fine powders which are difficult to adhere to the coated object is installed in the recovery powder circulation path.SELECTED DRAWING: Figure 1

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 invention provides a drinking water pipeline anti-corrosion powder coating multi-component proportioning intelligent batching method and system, and relates to the technical field of intelligent manufacturing, and the method comprises the following steps: obtaining drinking water pipeline anti-corrosion powder coating raw material parameters and formula information; constructing a quantitative characteristic volume element numerical simulation unit, and performing multi-scale bridging calculation in combination with microscopic molecular dynamics and a macroscopic discrete element method; inputting parameters, calculating, correcting a formula, and converting into control parameters; dynamically adjusting parameters through a regression network self-learning feedback compensation algorithm; starting mixing equipment for batching, calculating the uniformity in real time, stopping mixing after the uniformity reaches the standard, detecting a finished product, and generating a report. According to the invention, through a self-learning feedback compensation algorithm based on a regression network, in combination with real-time weight detection and a material blockage identification result, intelligent dynamic adjustment of quantitative feeding control parameters is realized.

The invention belongs to the technical field of coating production, and particularly discloses an outdoor durable powder coating preparation device and a preparation process thereof.The outdoor durable powder coating preparation device comprises a bridging column, a mixing barrel is fixed to the top of the bridging column, a discharging sleeve is arranged at the bottom of the bridging column, and a stirring device is arranged at the top of the bridging column; a transmission cavity penetrating to the bottom is formed in the bridging column, and a material conveying assembly is arranged in the transmission cavity. According to the device, a powder coating and a liquid solvent are injected into the material mixing barrel through the feeding pipe, then the material conveying assembly is driven to work through the driving shaft, and when the material conveying assembly works, stirred fluid in the material mixing barrel can be intermittently conveyed into the discharging sleeve; and then the stirring device is driven to stir the interior of the material mixing barrel while the material conveying assembly works, and the pneumatic assembly is driven to work to atomize and spray out fluid flowing out of the material conveying assembly, so that coated fine particles generated during material mixing are crushed.

The invention belongs to the technical field of flame-retardant coating preparation, and discloses a flame-retardant coating preparation device and a preparation method thereof.The flame-retardant coating preparation device comprises a reaction cylinder, a water inlet, a first discharging pipe and a mixing mechanism arranged in the reaction cylinder and further comprises a discharging assembly installed at the top of a cavity of the reaction cylinder; the discharging assembly comprises a discharging opening fixedly formed in the top of the reaction cylinder and a funnel, and the funnel is rotationally provided with a conveying roller. According to the scheme, a mixture of water and a solvent is injected into the reaction cylinder through the water inlet, meanwhile, the turbine and the mixing blades rotate through rotation of the motor, and the turbine rotates to convey a mixed solution in the reaction cylinder to the top of the mixing cavity through the main pipeline; and meanwhile, the powder raw materials and the mixed solution in the mixing cavity can be stirred and mixed at a high speed through rotation of the mixing blades, the mixed coating can be discharged through a second discharging pipe, operation is completed, and the situation that the powder coating is accumulated and agglomerated is avoided.

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 field of computers and auxiliary equipment, and discloses a high-density server-oriented multi-channel parallel liquid cooling cabinet, which comprises a server cabinet body and a multi-channel liquid cooling heat dissipation cabinet, a liquid leakage detection mechanism; the liquid leakage detection mechanism is arranged at the bottom of the multi-channel liquid cooling heat dissipation cabinet, the liquid leakage detection mechanism is used for detecting the liquid leakage condition of the parallel liquid cooling mechanism, and the liquid leakage detection mechanism comprises a liquid leakage detection plate, a flow guide plate, a leaked liquid collection barrel, a liquid level switch, a powder coating, a flow guide opening and a supporting frame. The mode that powder coating mark leaving and liquid level switch alarming are combined is adopted, graded response to the liquid leakage amount is achieved, and when a small amount of liquid is leaked, the powder coating provides early warning; when the liquid leakage amount is increased, the liquid level switch triggers the alarm to give out a sound-light alarm, and the graded alarm mechanism enables a manager to carry out corresponding treatment according to the liquid leakage condition, so that the response efficiency is improved.

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 powder coating evaluation, and discloses a test method for multi-dimensional performance intelligent evaluation of a powder coating coating. The method comprises the following steps: firstly, carrying out multi-parameter data acquisition on a coating sample and removing abnormal data to obtain an effective parameter data set; determining core parameter types according to parameter physical attributes and test standards; determining a weight coefficient of each core parameter according to the test data distribution characteristics of the core parameters and the change rates in different environments, and determining a key evaluation dimension when the weight coefficient accords with a preset range; standardizing the test data of the key evaluation dimension to obtain a standardized evaluation matrix; and finally, constructing a multi-dimensional performance evaluation model based on the matrix. According to the method, through multi-parameter acquisition, data processing and model construction, multi-dimensional intelligent evaluation of the coating performance of the powder coating is realized, and a new way is provided for comprehensive consideration of the coating performance.

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.

Belonging to the technical field of waste gas purification, the invention relates to a waste gas purification device for powder coating production, the waste gas purification device for powder coating production comprises a dust removal tank, a gas inlet pipe, a purification tank, an exhaust pipe and a purification box, and also comprises: a filtering mechanism; a cleaning mechanism; a recoil mechanism; a catalytic mechanism; and a disinfection mechanism. Through cooperative use of the cleaning mechanism and the backflushing mechanism, in the revolution process of the filter cartridge, the filter cartridge can rotate in the revolution process through the arrangement of the cleaning mechanism, so that a backflushing ring and a cleaning ring move up and down in a reciprocating manner along the inner surface and the outer surface of the filter cartridge; according to the device, particles attached to the outer surface of the filter cartridge are removed in an all-around manner, and a cleaning ring is arranged in a matched manner, so that firmer particles attached to the outer surface of the filter cartridge can be removed, and the cleanliness of the filter cartridge is ensured, so that the waste gas filtering efficiency of the filter cartridge is improved, and the situation that the circulation efficiency of waste gas is reduced due to blockage of the filter cartridge is avoided; and the service life of the filter cartridge is prolonged.

Disclosed are a corrosion-resistant film for a magnesium alloy wheel and a preparation method thereof, The corrosion-resistant film for a magnesium alloy wheel includes: a micro-arc oxidation (MAO) coating, a chemically blocked coating, a physical vapor deposition (PVD) high-density inorganic hybrid coating, a high oxidation-resistant powder coating which are sequentially stacked from inside to outside by using the magnesium alloy wheel as a substrate. In the present disclosure, based on a micro-arc oxidation technology, zirconium, titanium, an iron salt, nano silicon, polymer resin are added into an electrolytic solution, and under a constant voltage mode of an adjustable power supply, the MAO coating is generated on the surface of the magnesium alloy wheel, followed by chemical blocking; the PVD high-density inorganic hybrid coating is obtained by coating on the chemically blocked coating, physical blocking is performed; the high oxidation-resistant powder coating is spray-coated on the PVD high-density inorganic hybrid coating.

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%.

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 relates to the field of pipeline connection, in particular to a squeezing and pushing sealed pipeline connection protection lining sliding sleeve which comprises a sliding sleeve body, a sealing unit and a movable squeezing and pushing unit. The sliding sleeve body is of a hollow circular ring body structure, coated with a sintered epoxy powder coating and composed of two end cylinders and a middle cylinder. The outer diameter of the end cylinder is larger than that of the middle cylinder. A heat insulation layer is arranged on the outer wall of the middle-section cylinder. And the sealing unit is sleeved on the middle-section cylinder. The movable squeezing and pushing unit is of a combined circular ring structure and is movably arranged on the middle section cylinder in a sleeving mode, and the sealing unit is squeezed and pushed to the circular bead face of the end cylinder through movement to seal the gap. The invention also comprises a processing and installing method. When the sliding sleeve is installed at the pipe end, the sealing ring can be kept not compressed or compressed slightly in the radial direction as much as possible. After the sliding sleeve is installed at the pipe inlet end, the sealing ring is expanded in the radial direction through axial squeezing and pushing, the compression rate is adjustable, the sealing ring can adapt to different pipelines, compression on the radial pipe wall is generated, and therefore the reliable sealing performance of the sliding sleeve is guaranteed.

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.