72 results about "Automotive coating" patented technology

The invention discloses a synergistic compound light stabilizer for an automobile coating and a preparation method of the synergistic compound light stabilizer, and belongs to the technical field of coating additives. The light stabilizer comprises the following components in percentage by mass: 30-50% of a hindered amine light stabilizer, 20-40% of an ultraviolet light absorber, 5-15% of surface modified nano cerium dioxide, 5-10% of a hyperbranched polyester anti-migration aid and the balance of a solvent, wherein the ultraviolet light absorber is a mixture of benzotriazole and triazine in a mass ratio of (1: 1)-(1: 3); the particle size of the nano cerium dioxide is 10-50nm, and the surface of the nano cerium dioxide is coated with a silane coupling agent; the preparation method comprises the following steps: modifying the surface of nano cerium dioxide, shearing and dispersing multiple components at a high speed, and adjusting and filtering a solvent; the weather resistance of the automobile coating is remarkably improved and the service life of the automobile coating is remarkably prolonged through the synergistic effect of a plurality of light stabilizing components and the combination of the photocatalytic degradation capability of the nano cerium dioxide and the anti-migration characteristic of the hyperbranched polyester.

The invention belongs to the technical field of automotive coatings, and particularly relates to finishing-free water-based plain finish paint and a preparation method thereof. The water-based blocked isocyanate and the water-based hydroxyl acrylate are crosslinked to form a carbamate bond and construct a three-dimensional hydrogen bond network, so that the mechanical strength, the sagging resistance and the chemical resistance of the finish paint are remarkably improved; amino resin is modified through dialdehyde lignin, hydrophilic groups in the amino resin are eliminated, reversible imine bonds are generated, and the acid-base hydrolysis resistance of the finish paint is enhanced; the polyether-polysiloxane is grafted with the water-based blocked isocyanate, so that the storage stability of the finish paint is ensured, the sagging phenomenon of a vertical surface is inhibited, the surface tension of the finish paint is reduced, orange peel is eliminated, and the integrated performance improvement of high weather resistance, sagging resistance and low orange peel of the finish paint is realized.

The invention discloses a preparation method of hydroxy acrylic resin and the hydroxy acrylic resin, and belongs to the field of paints.The preparation method comprises the following steps that S01, a monomer and part of an initiator form a mixed solution, an initiator solution and a terminator solution; s02, adding materials; s03, dropwise adding the mixed solution; s04, dropwise adding an initiator solution; s05, terminating the reaction; and S06, filtering to obtain a hydroxy acrylic resin product. The method disclosed by the invention is environment-friendly, and the prepared hydroxy acrylic resin is applied to automobile coatings and has the advantages of higher hardness, scratch resistance, high gloss and quick drying.

The invention discloses an anti-aging bronze powder pigment and a preparation method and application thereof in the technical field of bronze powder pigments, and the anti-aging bronze powder pigment takes copper-zinc alloy as a base material, and is sequentially connected with a composite chemical passivation layer, a functionalized organic-inorganic hybrid compact barrier layer and a surface super-hydrophobic layer through chemical bonding from inside to outside; wherein the composite chemical passivation layer is formed by treating a passivation solution containing phytic acid, ammonium metavanadate and sodium tungstate; the functionalized organic-inorganic hybrid compact barrier layer is constructed by a silane mixed solution containing 3-mercaptopropyltriethoxysilane, a reaction type ultraviolet light absorber Si-BP, a reaction type hindered amine light stabilizer Si-HALS and tetraethyl orthosilicate through a sol-gel process. Through the design of a multi-layer composite system, the aging resistance of the bronze powder is improved, and meanwhile, the optical decoration performance can be reserved to the maximum extent, so that the dual strict requirements of high-end outdoor applications such as automobile coatings on durability and visual texture can be met.

The invention discloses 1K varnish as well as a preparation method and a spraying method thereof, relates to the technical field of automobile coating varnish, and solves the problems that the existing 1K varnish is difficult to be matched with a water-based colored paint system and is poor in performance. Comprising acrylic polyol, a thermosetting hydroxylated acrylic copolymer solution, thermosetting hydroxylated acrylic resin, polycarbonate diol, amino resin, blocked isocyanate resin, a leveling agent, a catalyst, an aging aid, a wetting dispersant and a solvent. The amino resin comprises butylated amino resin and a trifunctional melamine cross-linking agent; bYK306 and BYK358N are used as the flatting agents; the catalyst comprises an acid catalyst and a metal catalyst; the aging auxiliary agent comprises an ultraviolet light absorber 80 and a light stabilizer uv-93; the wetting dispersant is BYK-161; the solvent is prepared from butyl acetate, DBE, ethyl ethoxypropionate, ethylene glycol butyl ether acetate and n-butyl alcohol. The method is suitable for being matched with a water-based production line and is wide in applicability.

The invention discloses a functional radiation refrigeration coating and a preparation method thereof, and aims to overcome the defects that after a water-based coating is formed, the stability is low under ultraviolet irradiation, the adaptability to a humid environment is limited, and the radiation refrigeration performance is low. The preparation method comprises the following steps that firstly, silane modified zinc oxide dispersion liquid is prepared; mixing the silane modified zinc oxide dispersion liquid with a beta-cyclodextrin solution, and performing ultrasonic uniform dispersion; and then adding the uniform dispersion liquid into the aqueous polyurethane dispersion liquid, continuing to add the poly (N-isopropylacrylamide) dispersion liquid and the thickening agent, and fully stirring. And finally, uniformly coating a substrate with the modified waterborne polyurethane dispersion liquid, and carrying out heating treatment to prepare the multifunctional radiation refrigeration coating. The waterborne polyurethane material obtained by the preparation method can be widely applied to the fields of automobile coatings, energy-saving coatings and the like.

The utility model discloses a premixing device for automobile coating production, which belongs to the field of coating production and comprises a premixing tank provided with a premixing stirrer, the top of the premixing tank is respectively connected with a premixing pigment feeding pipe and a premixing filler feeding pipe, and the bottom of the premixing tank is connected with a premixing material discharging pipe. The side parts of the premixing tank are respectively connected with a premixing resin feeding pipe and a premixing solvent feeding pipe, the premixing pigment feeding pipe is connected with the first tubular screw conveyer, the premixing filler feeding pipe is connected with the second tubular screw conveyer, the top of the premixing tank is also connected with an air outlet pipe, and the air outlet pipe is connected with a vacuum pump. The premix produced by the utility model is good in uniformity.

This utility model relates to the field of automotive painting auxiliary equipment technology, specifically an auxiliary trolley for installing an electrophoresis chamber for automotive pre-painting. It includes a power mechanism, a main frame of the trolley, kick plates, railings, limiting grooves, a railing door, a trolley positioning and locking mechanism, a patterned steel plate, and a lifting mechanism. The power mechanism is located on both sides of the main frame of the trolley. The railings are fixed along the four perimeters of the main frame, and the kick plates are fixed around the perimeter of the railings. A railing door is located on one side of the railing above one set of power mechanisms. Four trolley positioning and locking mechanisms are respectively located on the main frame of the trolley. Each railing corresponding to a positioning and locking mechanism has a limiting groove. The patterned steel plate is fixedly laid on the upper surface of the main frame of the trolley. The lifting mechanism is located inside the installation auxiliary trolley. This utility model allows for rapid movement and changes in the construction area, greatly shortening the work surface transfer time and improving installation efficiency. It is faster and more labor-saving than manual handling.

The invention discloses an automobile ornament softwood surface coating, a preparation method and application, and relates to the technical field of automobile coatings, the automobile ornament softwood surface coating comprises the following specific components: a primer, a brush-off layer, a seal paint and a finish paint. Aiming at the structural defects and practical application requirements of the cork material, a multifunctional synergistic system of primer, brush-off layer, seal paint and finish paint is constructed; the nano flake mica and the nano montmorillonite form a labyrinth type water-blocking structure in the primer, the hyperbranched polyester and the nano cellulose construct a stable color wiping and developing system, and the organic silicon sealing layer is compounded with the hollow microbeads and the nano zinc oxide to realize light-weight heat insulation protection. And nano aluminum oxide and fluorine modified wax powder in the finish paint jointly enhance the wear resistance and scratch resistance of the surface, so that the overall weather resistance, adhesive force, damp heat resistance, aging resistance and mechanical stability of the cork are effectively improved on the premise of not sacrificing the natural touch of the cork. And a complete set of technical support and an industrialization foundation are provided for large-scale application of the cork material in automobile high-end ornaments.

The invention discloses an automobile coating aging fine granularity calculation and fine granularity three-dimensional characterization method based on an Arrhenius formula. The method comprises the following steps: drawing a three-dimensional geometric model of an automobile; the method comprises the following steps: importing material characteristics of an automotive coating of an automobile into thermal analysis software, setting simulation condition parameters and selecting a basic solver; performing gridding division on the three-dimensional geometric model by utilizing gridding division software, and then completing simulation modeling; establishing an aging model of the vehicle coating based on an Arrhenius formula; sorting the temperature values and the received irradiation doses according to different moments, substituting the sorted temperature values and the received irradiation doses into an aging model, and calculating an aging coefficient value of the vehicle coating within cumulative time; displaying the aging coefficient values of all the test points on the vehicle coating as point cloud values to generate an aging coefficient distribution diagram; and based on the aging coefficient distribution diagram, in combination with actual measurement data of an outdoor exposure test, calculating a fitting relationship between the aging coefficient of the vehicle coating and the chromatic aberration value and a fitting relationship between the aging coefficient of the vehicle coating and the glossiness. The invention provides a quicker and more accurate evaluation means for material aging.

The invention relates to the technical field of automobile coating detection, and discloses a viscosity detection device and method applied to automobile interior trim part coating production, the viscosity detection device applied to automobile interior trim part coating production comprises a base, a viscometer mounted on the base, and a fixing frame fixedly mounted on the base, a hopper is arranged at the upper end of the fixing frame, a limiting barrel is axially arranged in the hopper, a flow guide rod is movably sleeved with the limiting barrel, a buoyancy barrel is fixedly connected to the lower end of the flow guide rod, and a plurality of slow flow layering pieces and a directional flow guide piece are arranged on the inclined face of the buoyancy barrel. The buoyancy cylinder is matched with the slow flow layering part, on one hand, the flow velocity of the coating can be reduced, and the coating is prevented from entraining air to enter the detection cup due to too high flow velocity, and on the other hand, the slow flow layering part enables the coating to form differentiated flow, generate shearing force and turbulent flow, extrude and promote bubbles to be separated upwards, so that original bubbles in the coating are discharged. The viscosity detection accuracy of the coating is improved.

The invention belongs to the technical field of automobile coatings, and discloses a reflective heat-insulating coating as well as a preparation method and application thereof. The reflective heat-insulation coating provided by the invention comprises modified acrylic resin, reflective heat-insulation filler and an ultraviolet light absorber according to a specific mass ratio, and optional auxiliaries such as pigment and a defoaming agent. The modified acrylic resin can form a strong combination effect with hollow glass beads and titanium dioxide in the reflective heat insulation filler through multiple modes such as non-covalent combination, space winding and physical barrier, and has excellent compatibility with other components in the coating; according to the present invention, the compactness of the film layer obtained after the reflective thermal insulation coating film forming and the adhesion with the cold-rolled steel sheet surface are effectively improved, and the film layer has advantages of excellent reflective thermal insulation effect, excellent durability and excellent salt spray resistance, can well meet the requirements of automobiles in the long-term use process, and has excellent application prospects.

The invention belongs to the technical field of automobile coatings, and particularly relates to a wet-on-wet water-based automobile intermediate coating based on interface self-strengthening and multi-network cooperation as well as a preparation method and application of the wet-on-wet water-based automobile intermediate coating. The water-based paint is composed of the following components: a water-based main resin system, amino resin, an aqueous solution of ammonium zirconium carbonate, a polyethylene glycol-block-polycaprolactone-urea-based copolymer, a flash-dry wax emulsion, a volatile pH regulator, a solvent, an auxiliary agent, a water-based color paste and water. According to the intermediate coating disclosed by the invention, the temperature-sensitive characteristic of ammonium zirconium carbonate is utilized, an ionic cross-linked network is quickly formed during flash drying, the wet film strength is instantly improved, and the problems of bottom biting, color bleeding and the like are fundamentally prevented. Through the chemical crosslinking of the amino resin and the dynamic hydrogen bond network cooperation of the temperature-sensitive hydrogen bond enhancer, the paint film has high hardness, chemical resistance, excellent flexibility and excellent stone impact resistance at the same time. The flash-dry wax emulsion forms a net on the surface of a paint film, so that the scratch resistance is improved; and during baking, melting and interpenetrating with the upper and lower coatings to form a reinforced interface to lock the interlayer adhesive force.

The present invention relates to the technical field of automotive paint testing, and specifically to a wear resistance tester and testing method for automotive paint, including a testing platform, a testing mechanism, and a locking unit. By increasing the number of testing stations and setting multiple different comparison groups, the present invention simulates the wear conditions of automotive paint in real situations with reference to different grinding head materials and different applied forces of the grinding head, improving the authenticity of test results. Moreover, by simultaneously testing and comparing multiple stations, the testing efficiency is improved, eliminating the cumbersome processes of repeatedly replacing grinding heads, applying different downward pressures, and conducting multiple repeated tests. Secondly, according to testing requirements, multiple stations can be set to conduct tests simultaneously, and all stations can be locked simultaneously through the locking unit, improving the testing efficiency and the convenience of the testing process.

The invention relates to the technical field of automobile coatings, in particular to a primer for a nylon and polyphenyl ether composite material and a preparation method of the primer. The primer comprises the following components in parts by weight: 30-40 parts of hydroxy acrylic resin, 1-5 parts of amorphous polyester resin, 1-5 parts of a dispersing agent, 0-1 part of an anti-settling aid, 0-1 part of a flatting agent, 0-1 part of carbon black, 5-20 parts of titanium dioxide, 5-10 parts of filler and 20-40 parts of a solvent. Compared with the prior art, through the synergistic effect of the hydroxy acrylic resin and the amorphous polyester resin, the adhesive force of the primer to a nylon and polyphenyl ether composite material base material is remarkably improved, and particularly, the high-pressure water washing resistance is greatly improved; the key technical problem that the adhesive force of the coated composite material does not reach the standard is effectively solved.

The present application relates to the technical field of automobile paint testing, in particular to a kind of automobile paint wash resistance tester and method, including test table, clamping part and testing mechanism.The present application is installed with flushing assembly and scrubbing assembly by plug-in installation mode, for simulating the real use situation of automobile coating, the angle of flushing and scrubbing is adjusted by angle adjusting part, the height during testing is adjusted by distance adjusting part, and multiple control groups are set at the same time for comparison test, and different angle flushing and scrubbing and different height flushing situation are simulated, to ensure the reliability of test result data, a variety of different situations are tested at one time by multiple quick-release installation and control test process, and the convenience of test process is improved.

Methods and systems are disclosed herein for modifying one or more color changing exterior surfaces of a vehicle in response to identified safety events. Specifically, a safety event is identified in a surrounding environment of a vehicle that comprises one or more color-changing exterior surfaces. In response to the identifying of the safety event, a color scheme is selected for the one or more color-changing exterior surfaces of the vehicle based on the type or safety event and the appearance of the surrounding environment. One or more color changing exterior surfaces of the vehicle are modified to match the selected color scheme.

This invention discloses a high-solids-content silicon-containing multi-arm star-shaped hydroxyl polyester for antifouling automotive coatings and its preparation method. The preparation method includes the following steps: mixing 1,3-dihydroxymethylurea, polyol, and caprolactone, adding an acid catalyst for reaction, and after the caprolactone has completely reacted, adding a single-ended epoxy-based polysiloxane and a cationic ring-opening catalyst dropwise. After the addition is complete, the reaction continues until the epoxy value decreases to below 1% of the initial value. Then, distilled water is added to decompose the cationic ring-opening catalyst. The mixture is then distilled under high vacuum conditions and cooled before being discharged to obtain the high-solids-content silicon-containing multi-arm star-shaped hydroxyl polyester. The high-solids-content silicon-containing multi-arm star-shaped hydroxyl polyester of this invention has advantages such as long activation period, low application viscosity, high application solids content, good chemical resistance of the coating film, fluorine-free properties, and good stain resistance when applied to polyurethane coatings.

The invention provides an automobile coating electrophoresis overturning clamp and a using method, the automobile coating electrophoresis overturning clamp comprises a regulation and control unit and mounting frame shells, three mounting frame shells distributed up and down are arranged on one side of a fixed frame shell, the mounting frame shell located in the center is connected with one side of the fixed frame shell, and the two mounting frame shells located on the upper side and the lower side are both in transmission connection with a distance control assembly; the regulation and control unit is arranged in an inner cavity of the fixed frame shell. Through the arrangement of the regulation and control unit, the distance between every two adjacent mounting frame shells can be adjusted, so that the distance pressed by the corresponding clamping part can be adjusted, the clamping part can be vertically adjusted, the clamping part can be transversely adjusted through the translation assembly, the position adjustment range of the clamping part is large, and the clamping part can be conveniently adjusted. And for automobile parts with large sizes or different shapes, stable clamping is facilitated, the automobile coating quality is improved, and the application range of the clamp is expanded.

The invention discloses an automobile ornament surface ice pattern coating, a preparation method and application, and relates to the technical field of automobile paints.The automobile ornament surface ice pattern coating is prepared from a water-based acrylic acid-organosilicon copolymer, a nanocrystal template agent, low-temperature phase-change filler, inorganic structural color paste, an environment-friendly pattern forming solvent and a nanocellulose flexibilizer; the coating is prepared and applied based on the components. A low-Tg gradient film forming system is constructed by adopting a water-based acrylic acid-organosilicon copolymer, a nanocrystal template agent and a low-temperature phase-change filler are cooperatively introduced, generation of dendritic ice crystals is induced through freezing at-10 DEG C, a concentration gradient is formed in combination with an environment-friendly texture forming solvent, and finally, textures are fixed and locked through stepped curing and UV strengthening, so that the high-temperature-resistant texture coating is obtained. According to the present invention, the real ice flower texture with the fractal dimension of more than or equal to 1.75 and the texture depth of 15-35 [mu] m is constructed on the ABS / PC substrate surface, the VOC content of the coating material is less than 35 g / L, the curing temperature does not exceed 60 DEG C, and the thermal sensitive substrate does not warp.

The invention discloses a preparation method of a radiation refrigeration waterborne polyurethane film with moisture resistance in the field of composite materials, and aims to overcome the defects that waterborne polyurethane is easy to absorb moisture and poor in radiation refrigeration performance after being molded, and the preparation method comprises the following steps: firstly, preparing a metal organic framework material by a solution coprecipitation method; uniformly dispersing the metal organic framework material in the aqueous polyurethane solution to obtain a homogeneous dispersion liquid; a silane modifier is dissolved in an ethanol / deionized water solution and fully stirred. And then mixing the treated silane modifier with the aqueous polyurethane / metal organic framework material dispersion liquid, and carrying out drying and heat treatment processes to prepare the radiation refrigeration aqueous polyurethane film with moisture resistance. The waterborne polyurethane material obtained by the preparation method can be widely applied to the fields of automobile coatings, energy-saving coatings and the like.

This application provides a water-based paint, its preparation method, an automotive coating, and an automobile. By weight, it comprises the following components: 5-30 parts of a water-based polyester-modified acrylic resin secondary dispersion, 20-50 parts of a water-based hydroxyl acrylic resin secondary dispersion, 5-15 parts of a water-soluble acrylic resin, 5-15 parts of an acrylic-modified polyester dispersion, 8-13 parts of an amino resin, 1-2 parts of a dispersant, 2-6 parts of an additive, 5-20 parts of a pigment, 1-5 parts of a solvent, and 15-25 parts of water; wherein the hydroxyl content in the solution of the water-based hydroxyl acrylic resin secondary dispersion is 2.5%-5% by weight, and the hydroxyl content in the solution of the water-based polyester-modified acrylic resin secondary dispersion is 3%-5% by weight. The water-based paint of this application, with its components working synergistically, produces a water-based color paste with excellent hardness, gloss, and resistance to gasoline, water, damp heat, and salt spray.

The invention discloses a preparation method and application of high bird droppings resistant coating varnish for automobiles, and belongs to the technical field of automobile coatings. The high-performance single-component solvent type varnish is prepared by constructing a special'acrylic resin-amino resin-blocked isocyanate 'ternary cross-linked network and introducing functional resin containing a carbamate bond (-NH-CO-O-) as an acid-resistant modified component. The method comprises the following steps: firstly, constructing a basic cross-linking system through pre-dispersion of multi-component resin, and then, carrying out synergistic compounding and regulation by utilizing auxiliaries such as a flatting agent and a drier, so as to finally prepare a finished product. According to the varnish, the high chemical inertness of carbamate bonds is utilized, the resistance of a paint film to acidic substances in bird droppings is remarkably improved, the bird droppings resistance level is Rbd2 level or above, and meanwhile the construction convenience of a single-component system is kept.

The utility model provides a horizontal filter for automobile paint, which is used for solving the problem that a filter medium cannot be quickly detached, cleaned or replaced because the internal structure of the filter is complicated. The filter comprises a bin body and a feeding pipe, a feeding opening is formed in the top end of the bin body, fan-shaped blocks are connected into the feeding opening through a plurality of sliding rods, fixing springs are arranged between the fan-shaped blocks and the bin body, clamping blocks are fixed to one ends of the fan-shaped blocks, the clamping blocks are provided with inclined faces, the inclined faces gradually approach the fan-shaped blocks from bottom to top, and the fan-shaped blocks can be spliced into a cylindrical pipe. The cylindrical pipe is fixedly provided with a first filtering device through the clamping blocks, the first filtering device comprises a clamping ring and a first filtering groove, the inner side face of the clamping ring is provided with a fixing inclined face matched with the clamping blocks, and when the adjacent fan-shaped blocks abut against each other, the inner diameter of the clamping ring is larger than the maximum diameter of the clamping blocks. By inserting and pulling the feeding pipe, the fan-shaped block and the clamping block can be synchronously driven to be matched with the fixed inclined surface in the clamping ring, so that the effect of quickly disassembling and assembling the first filtering tank is achieved.

The invention discloses an automobile coating filtering structure, and relates to the technical field of automobile coating, the automobile coating filtering structure comprises a bag type filtering mechanism, the bag type filtering mechanism comprises a filtering bin, a connecting mechanism is arranged on the filtering bin, a supporting mechanism is arranged on the connecting mechanism, and the connecting mechanism is used for connecting the filtering bin and the supporting mechanism; and a guide hopper for guiding the coating fed from the feed port to flow into the filter bag is arranged in the filter bin. The device has the advantages that the side supporting assemblies are matched with the filter bag, the wave strip sets are adjusted to be properly and intermittently attached to the side wall of the filter bag, the driving ring drives the filter bag to rotate, the rotation of the filter bag is beneficial to continuously changing the feeding position of paint, and the supporting mechanism is matched with the filter bag, so that the feeding position of the paint can be continuously changed in the up-down moving process of the filter bag and the upper supporting piece; the filter bag vibrates up and down, the upper supporting piece continuously supports the bottom of the filter bag, the lower portion of the filter bag is prevented from collapsing, and the upper supporting part of the filter bag is prevented from stress concentration in the high-pressure, high-flow or up-and-down moving process.

The invention discloses a high-wear-resistance coating for automobile ornaments, a preparation method and application, and relates to the technical field of automobile paints.The high-wear-resistance coating comprises fluorine-modified polycarbonate resin, fluorine-silicon synergistic core-shell particles, a photoinitiator, a reactive diluent, polytetrafluoroethylene wax and a flatting agent; the preparation is carried out based on the above components. According to the high-wear-resistance coating for the automobile ornaments, the preparation method and the application, the wear resistance and the dispersion stability of the coating are remarkably improved by constructing a fluorine-silicon synergistic core-shell structure taking the gamma-aluminum oxide nanorod as a core and the fluorine-containing polymer as a shell; fluorine-modified polycarbonate resin is adopted to construct a low-surface-energy film-forming system, so that the sweat and ethanol corrosion resistance is improved; and a UV-heat synergistic curing process is introduced, so that efficient and rapid curing and excellent surface quality are realized while the film thickness and the energy consumption are reduced. The whole system is superior to the prior art in the aspects of wear resistance, chemical resistance, energy consumption control and construction adaptability, and has remarkable comprehensive performance improvement and wide industrial application value.

The invention discloses a red pearlescent pigment as well as a preparation method and application thereof, and relates to the technical field of automobile coatings. The red pearlescent pigment comprises a laminated oxide film which is alternately prepared from silicon dioxide and titanium dioxide; a starting film layer and a terminating film layer of the laminated oxide film are silicon dioxide films; the number of layers of the laminated oxide films is 5-13. The prepared red pearlescent pigment has no shielding effect on millimeter wave radar, can meet the requirements of an automatic driving technology, and has the characteristics of high flickering feeling and high covering power. When the red pearlescent pigment is prepared by adopting a physical vapor deposition method, no three wastes are generated in the production process, the process is environment-friendly, the pigment performance of the prepared product is superior to that of a red pearlescent product prepared by a traditional process, and the red pearlescent pigment is expected to be popularized and applied in the field of automobile coatings.

The invention relates to the field of resin, in particular to UV curing resin and a preparation method thereof, and the UV curing resin comprises the following raw materials in parts by weight: 30-50 parts of NEBA, 50-70 parts of IBOA, 1-5 parts of a photoinitiator and 0.1-2 parts of nano silicon dioxide dispersion liquid. NEBA and IBOA are combined in a chemical copolymerization mode, a rigid-flexible synergistic cross-linked network is constructed, the prepared finished product has high cross-linking density, ultralow shrinkage rate and excellent optical performance, indexes such as hardness, solvent resistance and light transmittance are remarkably superior to those of products in the existing market, and the product is suitable for the fields of precise optical elements, electronic packaging, automobile coatings and the like and has wide application prospects. The finished product can be directly applied to existing UV coating equipment, extra investment is not needed, and the process compatibility is high.

This invention provides a composite coating for a vehicle body, a vehicle, and a method for applying the composite coating, relating to the field of vehicle painting technology. The composite coating includes a primer layer, a first clear coat layer, a colored clear coat layer, and a second clear coat layer, arranged sequentially from the inside out. By applying the technical solution of this invention, and by sequentially arranging a topcoat layer, a first clear coat layer, a colored clear coat layer, and a second clear coat layer in the vehicle body coating from the inside out, orderly light penetration, selective coloring, and high-fidelity reflection are achieved in the multi-layer structure. This results in a deep, transparent color and a rich, crystal-like texture, solving the technical problem of flat color caused by traditional automotive coatings using only a single layer of clear coat.

The invention discloses a water-based wear-resistant automobile coating and a preparation method thereof, and belongs to the technical field of automobile coatings. The preparation method comprises the following steps: carrying out surface treatment on cellulose to endow nanocellulose with modifiability and functionality, oxidizing by using sodium periodate, grafting by using glutaraldehyde to introduce an aldehyde group structure, and introducing L-lysine to further graft and modify to obtain carboxyl grafted nanocellulose, and carrying out ring opening esterification on the carboxyl grafted nanocellulose and an epoxy group of epoxy resin to obtain the epoxy resin modified nanocellulose. The nano cellulose and the epoxy resin are firmly attached through an intermolecular acting force, so that the wear resistance is improved; furthermore, the copper-based coated nano filler is prepared, so that the wear resistance of the coating is enhanced; in addition, nano cellulose with a double-amino structure is introduced to be firmly combined with the metal-based nano filler through adsorption force, so that the nano filler is prevented from sliding when a paint film is rubbed.