1495 results about "Powder coating" patented technology

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 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 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.

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.

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 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.

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)

The invention discloses a high-performance coiled material powder coating and a preparation method thereof, and belongs to the technical field of powder paints.The high-performance coiled material powder coating has the advantages that organosilicon modified epoxy resin and carboxyl-terminated polyester resin are compounded, a-Si-O-Si-chain segment is introduced into a system after organosilicon modification, the flexibility is high, and the high-performance coiled material powder coating has a synergistic effect with nano calcium carbonate; the adhesive force and the flexibility of the coating are balanced, and the mechanical strength of the coating can be obviously improved by adding the grafted modified graphene oxide and the active chromic oxide; then, phosphite ester groups are grafted to the graphene oxide, the graphene oxide is applied to a powder coating system, a three-dimensional network structure and chemical bonding can be formed in the system, the crosslinking stability of the graphene oxide in the system can be improved, and a certain barrier property can be achieved due to the flaky structure of the graphene oxide; and the coating is endowed with long-acting weather resistance, and the weather resistance and the corrosion resistance of the coating are further improved through the synergistic effect with the active chromic oxide.

The present application relates to a kind of powder coating hydroxyalkylamide matting curing agent and its preparation method, the matting curing agent using including citric acid, 2-methyl-1,3-propanediol, dimethylbenzene, anhydrous methanol, N-methyl monoethanolamine, catalyst, nanometer titanium dioxide is reacted to obtain raw materials.In first, citric acid and 2-methyl-1,3-propanediol are grafted to carry out reaction, then the remaining four carboxyl groups of grafting are methyl esterification reaction, obtain methyl esterification product, then with N-methyl monoethanolamine acylation reaction obtains hydroxyalkylamide curing agent;Add nanometer titanium dioxide, fully mix and process to obtain the matting curing agent.The curing agent product functionality is higher, the hardness of coating film after curing is higher, and the boiling water resistance is excellent;And the coating film after curing has obvious matting effect, coating film gloss is basically reached 50-70%, and the decorative property is excellent.

The invention discloses an acid-alkali-resistant high-weather-resistant insulating powder coating as well as a preparation method and application thereof in the aspect of sound screens of high-speed guardrails, and relates to the technical field of fluorocarbon resin powder coatings. The insulating powder coating with acid and alkali resistance and high weather resistance is prepared from the following raw materials in parts by weight: 15 to 25 parts of fluorocarbon resin, 40 to 50 parts of polyester resin, 5 to 12 parts of curing agent, 0.5 to 2 parts of accelerant, 3 to 8 parts of corrosion-resistant agent, 2 to 5 parts of weather-resistant agent, 1 to 2 parts of flatting agent, 0.3 to 1 part of benzoin and 10 to 15 parts of inorganic nano filler. The preparation method comprises the following steps: reacting 4-trifluoromethylphenol with 6-bromo-1-hexene to obtain an intermediate 1, generating an intermediate 2 from the intermediate 1 under the action of m-chloroperoxybenzoic acid, and reacting the intermediate 2 with amino-terminated polyether to generate the corrosion-resistant agent. The acid-base-resistant high-weather-resistant insulating powder coating prepared by the invention has good acid-base resistance, heat aging resistance and light aging resistance.

This invention discloses a heavy-duty anti-corrosion and anti-scaling epoxy powder coating, its preparation method, and its application, belonging to the field of coating technology. According to the weight composition, the epoxy powder coating comprises the following components: 45-60 parts epoxy resin, 8-15 parts curing agent, 5-25 parts filler, 5-10 parts synthetic filler, 1-10 parts pigment, 0.25-5 parts defoamer, 0.25-5 parts leveling agent, 0.25-5 parts antioxidant, and 0.25-5 parts curing accelerator, with the sum of all components being 100%. This coating exhibits low porosity (level 1 to 2) and low scaling rate (0.687-0.728 × 10⁻⁶). ‑3 (mg / cm 3 This coating exhibits superior properties, including high adhesion (≥50 MPa, significantly exceeding the ≥20 MPa bond strength specified in standard SY / T0442-2018), low cathodic disbondment (only 2.3-2.5 mm at 65℃, 1.5V, and 48h), excellent abrasion resistance (20-24 mg per kg / 1000r on a CS-17 wheel), and the ability to pass an impact test at -30℃ and 5J. It is suitable for complex and harsh industrial environments such as petrochemicals, marine engineering, heat transfer, and water treatment, providing a reliable protective solution for equipment and pipelines.

The invention discloses a wear-resistant stone-impact-resistant powder coating and a preparation method thereof, and belongs to the technical field of paints.The wear-resistant stone-impact-resistant powder coating has the advantages that epoxy resin, a polyurethane prepolymer mixture and a high-temperature-resistant and low-temperature-resistant elastomer modifier are compounded to form an epoxy-polyurethane-elastomer chemical bonding effect, and the wear-resistant stone-impact-resistant powder coating is excellent in compatibility and better in crosslinking density, flexibility and elasticity; the stone impact resistance is greater than or equal to 4B grade, and the problem of poor stone impact resistance of a powder coating in the prior art is effectively solved; the epoxy resin is compounded by bisphenol A epoxy resin and hydrogenated bisphenol A epoxy resin, and forms a coating system with a composite antirust system, a gradient wear-resistant filler (compounded by nano ZrO and emery powder), a composite antirust system and a composite flame retardant, and interacts with each other, so that the wear resistance, the impact resistance, the flame retardance and the corrosion resistance of the coating are further enhanced, and the service life of the coating is prolonged. And the coating is durable, so that the frequent maintenance or replacement requirement of the chassis is reduced, and the coating is also suitable for protecting high-value parts of the new energy automobile.

The invention relates to a high-strength corrosion-resistant aluminum profile and a preparation method and application thereof, and aims to solve the problems that the strength and the corrosion resistance of a traditional aluminum profile are difficult to consider, the surface performance is insufficient and the like. A novel aluminum profile with ultrahigh mechanical strength, excellent corrosion resistance, long-acting weather resistance and a self-cleaning function is developed through a composite technical path that a reinforced phase is generated in situ to optimize the matrix performance, an AT13 ceramic powder coating is used for strengthening the surface hardness and a high-strength corrosion-resistant coating is used for endowing functional characteristics.

The invention provides an electrostatic powder coating airflow stability real-time compensation method, and relates to the technical field of powder coating control, the method is realized based on an electrostatic powder coating airflow stability real-time compensation device, the device comprises a master control MCU, a pneumatic control valve, a stepping motor driver for driving the pneumatic control valve, and a current sampling circuit coupled to the stepping motor driver, the current collector is used for collecting winding current of the stepping motor in real time. The method comprises the following steps that after a pneumatic control valve is opened to a target opening degree and enters a holding state, a static holding current value of the pneumatic control valve is obtained; comparing the static holding current value with a preset reference holding current value, wherein the preset reference holding current value corresponds to the holding current required by the target opening degree under the smooth state of the airflow channel; according to the offset of the static holding current value relative to the reference holding current value, whether the airflow channel has a blocking trend or not is judged; if not, the current target opening degree of the pneumatic control valve is maintained, the airflow state change can be more directly sensed, and real-time active compensation is carried out.

The invention provides a bio-based low-temperature curing powder coating and a preparation method thereof, and belongs to the technical field of powder coatings, and the bio-based low-temperature curing powder coating specifically comprises the following components in parts by weight: 65-75 parts of bio-based resin, 5-6 parts of triglycidyl isocyanurate, 0.05-0.15 part of tetrabutylammonium bromide, 8-12 parts of air glass beads, 4-6 parts of mica and 0.4-0.6 part of ethylene bis stearamide. 0.7 to 1.3 parts of flatting agent, 0.2 to 0.5 part of benzoin, 0.3 to 0.7 part of amide wax and 6 to 8 parts of pigment. The curing temperature of the bio-based low-temperature curing powder coating is 100-120 DEG C, and the bio-based low-temperature curing powder coating has the advantage of low curing temperature, can be suitable for surface coating of plastic devices, has the advantages of salt mist resistance, impact resistance and the like, and can effectively solve the problems of existing powder coatings.

The invention discloses a super-weather-resistant powder coating as well as a preparation method and application thereof, and relates to the technical field of powder coatings. The super-weather-resistant powder coating comprises matrix resin, a curing agent, a flatting agent, a degassing agent, an antioxidant and pigment filler, the matrix resin is a mixture formed by mixing polyester resin and fluorocarbon resin according to the mass ratio of (57-65): (5-8), and the polyester resin is a mixture formed by mixing super-weather-resistant polyester and crystalline polyester according to the mass ratio of (50-53): (7-12). Crystalline polyester is matched with super-weather-resistant polyester and fluorocarbon resin to serve as matrix resin, the relation between super durability and mechanical performance in the powder coating is balanced, and then the powder coating can have excellent weather resistance and bending resistance after a coating is formed.

The invention discloses a scratch-resistant flame-retardant insulating powder coating, a preparation method thereof and application of the scratch-resistant flame-retardant insulating powder coating in rail transit and new energy automobiles, and relates to the technical field of polysiloxane powder coatings. The scratch-resistant flame-retardant insulating powder coating is prepared from the following raw materials in parts by weight: 100 to 120 parts of polysiloxane epoxy resin, 10 to 20 parts of modified curing agent, 5 to 10 parts of flame retardant, 3 to 6 parts of flexibilizer, 2 to 3 parts of flatting agent, 1 to 2 parts of benzoin and 8 to 10 parts of mica powder. The scratch-resistant flame-retardant insulating powder coating prepared by the invention has good impact resistance, flame retardance, adhesive force and insulating property.

The invention provides a long-acting anticorrosive epoxy powder coating and a preparation method thereof. The coating comprises epoxy resin, polyester resin, thiadiazole corrosion inhibitor loaded cerium-doped hydrotalcite composite particles, silane modified mica iron oxide, zinc phosphate, barium sulfate and the like. The core innovation lies in that 2-amino-5-(4-hydroxyphenyl)-1, 3, 4-thiadiazole corrosion inhibitor molecules are designed and synthesized, the molecules are loaded between cerium-doped magnesium-aluminum hydrotalcite nano container layers through an anion exchange method, corrosion environment pH responsive gradient release is achieved, a coating constructs a passive shielding, active corrosion inhibition and interface anchoring triple protection mechanism in the coating, and the corrosion resistance of the coating is improved. The neutral salt spray test resistance exceeds 2000h, and the coating is suitable for long-acting corrosion protection of iron accessories and cable bridges.

The invention belongs to the technical field of anti-corrosion pipelines, and particularly relates to an outer 3PE inner epoxy resin anti-corrosion pipeline and a production process thereof. Medium-frequency preheating; performing internal and external shot blasting to remove rust; carrying out silanization nanoparticle suspension liquid treatment; internal corrosion prevention; epoxy powder coating is sprayed on the outer surface of the steel pipe through an electrostatic spraying technology to form an anti-corrosion bottom layer, and the outer surface of the steel pipe is coated with adhesive and polyethylene to form an adhesive layer and a polyethylene layer. According to the invention, bisphenol A epoxy resin with low molecular weight is selected, and the molten epoxy powder coating has relatively low viscosity and can be fully infiltrated into the bottom of an anchor pattern on the surface of the steel pipe, so that the leveling effect is improved, the leveling time is shortened, and the epoxy resin coating is more uniform; meanwhile, under the promotion of an imidazole group, acid anhydride and bisphenol A epoxy resin are quickly crosslinked and cured to form gel, so that the viscosity of the epoxy powder coating is quickly increased, and sagging is prevented.

The invention provides epoxy resin for halogen-free flame-retardant self-leveling powder coating and a preparation method of the epoxy resin, and belongs to the technical field of powder coating. The flame retardant is mainly prepared from anhydrous piperazine, bisphenol A diglycidyl ether, trihydroxymethyl phosphorus oxide, triethyl phosphite, epoxy chloropropane, sodium hydroxide, N-methyl iminodiacetic acid, ethylene glycol diglycidyl ether and other main raw materials through polymerization. The prepared epoxy resin and 2-phenylimidazoline are subjected to low-temperature curing (135 DEG C / 20 min) on the premise that an additional flatting agent does not need to be used, the flexibility of a coating film is good, the impact resistance grade is high, the impact performance reaches the condition that no cracking phenomenon exists in the front and back 60cm, the leveling grade reaches the grade 7 or above, the gloss is high and reaches 95% or above, the oxygen index reaches 34% or above, and the halogen-free flame retardant performance is excellent.

The invention discloses a flame-retardant corrosion-resistant coating and a preparation method thereof, and relates to the technical field of fluorocarbon resin powder coatings. The flame-retardant corrosion-resistant coating comprises the following raw materials in parts by weight: 15-25 parts of fluorocarbon resin, 40-50 parts of epoxy resin, 3-5 parts of a curing agent, 5-7 parts of a reinforcing agent, 4-6 parts of a corrosion inhibitor, 6-8 parts of filler, 1-2 parts of a flatting agent and 0.5-1 part of benzoin. The preparation method comprises the following steps: reacting phosphonitrilic chloride trimer with p-hydroxybenzaldehyde to generate an intermediate 1, reacting the intermediate 1 with p-aminobenzoic acid to generate an intermediate 2, and reacting the intermediate 2 with 2-heptyl ethylene oxide to generate the reinforcing agent. The flame-retardant corrosion-resistant coating prepared by the invention has excellent mechanical properties, corrosion resistance, aging resistance and flame retardance.