168results about How to "Excellent physical and chemical properties" patented technology

The invention discloses a high-molecular composite powder material for SLS. The composite powder material comprises the following ingredients, by weight, 85%-99% of high-molecular powder, 0.1%-10% of laser absorbents, 0.1%-3% of flow promoters and 0.1%-2% of anti-oxidants. The preparation method for the composite powder material is advantaged by simple technology, environmental protection and easy implementation, and a high-molecular composite powder material with excellent molding performances can be obtained. The composite powder material can perform SLS molding through a fiber laser, the product precision is improved effectively, and application of the SLS technology in many fields is promoted.

The invention relates to a method for preparing graphene crosslinked type organic aerogel and carbon aerogel by normal-pressure drying, which takes phenols (P), amines, aldehydes, catalyst and solvent as a reaction system and graphene substances containing active functional groups as a cross-linking agent. The method comprises the steps of: curing to obtain organogel, and then carrying out normal-pressure drying to obtain the organic aerogel; and carrying out pyrolysis on the organic aerogel in the inert atmosphere at the temperature of 500-1600 DEG C to obtain the graphene crosslinked type carbon aerogel. The preparation method of the organic aerogel and the carbon aerogel is simple and rapid in technology; the conventional supercritical drying technology is avoided, and the prepared novel organic aerogel and carbon aerogel materials taking graphene as framework have new performances and wide application prospect; and the industrial production of the carbon aerogel can be expected to be realized.

The invention discloses a powder for a high-entropy alloy-based composite material modified layer synthesized on the surface of an iron single element alloy by a laser reaction and a preparation technology and belongs to the field of a surface engineering technology. The invention provides more excellent properties for the high-entropy alloy modified layer. The powder for the high-entropy alloy-based composite material is composed of 50-99 wt% of a high-entropy alloy powder and 1-50 wt% of a reinforced phase powder. By a laser irradiation alloying method, a high-entropy alloy-based composite material modified layer which has a uniformly distributed microstructure, is crack-free and has better performance than an original high-entropy alloy coating can be prepared.

The invention is environmental-friendly waterborne nanometer fireproof flame-retardant coating and the preparation method, which belong to the fireproof flame-retardant coating manufacturing industry. The flame-retardant coating is obtained through the compounding of two types of flame-retardant agents, waterborne resin, ammonium polyphosphate, melamine, carbon-forming agent, nanometer pigment and filler, micrometer pigment and filler and other auxiliary agent; the flame-retardant coating contains no organic agent and halogen flame retardant, low VOC content, good fireproof property, good physical and chemical properties; the composition of the flame-retardant coating is as follows: the content of waterborne resin is 10-90%; the content of phyllo-silicate nanometer flame retardant which contains phosphor, nitrogen organic intercalation is 1-50%; the content of nanometer magnesium hydroxide flame retardant wrapped by polymer is 1-50%; the content of ammonium polyphosphate is 1-30%; the content of melamine is 1-20%; the content of carbon-forming agent is 1-30%; the content of nanometer pigment and filler is 0.1 to 30%; the content of micrometer filler is 0.1 to 60%; the content of dispersant is 0.1 to 10%; the content of stabilizer is 0.1 to 10%; the content of water is 0.1 to 50%; the content of micrometer pigment is proper; firstly, waterborne resin, nanometer flame retardant, ammonium polyphosphate, melamine, carbon-forming agent, nanometer pigment and fillers, dispersant and stabilizer are put into a planet stirring reactor for stirring and even dispersion; micrometer pigment and filler, water, dispersant and stabilizer are added to the discharged mixture and then put into a high-speed dispersion machine for even dispersion so that the product is obtained.

The invention discloses an artificial quartzite plate material which comprises the following components in percentage by total mass of quartzite plate: 60-63 percent of quartz sand with the grain size of 5-100 meshes and inorganic silicon materials of waste glass granules, and the like, 28-32 percent of quartzite powder with 320-3000 meshes, 7-9 percent of unsaturated resin and 0.4-0.6 percent ofpigment and a coupling agent as well as other components in percentage by mass of resin: 0.5-1 percent of ultraviolet absorber, 0.5-1 percent of disintegrant and 0.8-1 percent of curing agent. The invention also discloses the quartzite plate prepared from the raw materials and a manufacturing process thereof. In the invention, the quartzite plate is produced by the steps of vibrating and pressurizing the quartz sand, the quartzite powder, the inorganic silicon materials of waste glass granules, and the like and the unsaturated resin under the vacuum state and curing and synthesizing under theintermediate temperature. The quartzite plate overcomes the problem that the traditional artificial stone is aged under strong lights after long-term use outdoors and has favorable physical and chemical properties.

The invention belongs to the field of construction materials and particularly relates to novel foam high-polymer composite and a production method. The novel foam high-polymer composite comprises 10-90 parts of thermoplastic plastics, 0.5-3 parts of plasticizer, 0.5-3 parts of flexibilizer, 0.5-3 parts of tackifier, 0.3-2 parts of internal and external lubricant, 0.5-3 parts of stabilizer, 0.5-5 parts of crosslinking modifier, 0.5-12 parts of regulator, 0.5-5 parts of foaming agent, 0.5-3 parts of filler, 0-20 parts of flame retardant, 10-90 parts of inorganic powder and pigment in proper quantity. The novel foam high-polymer composite in the technical scheme is energy-saving, emission-reducing, acid-resistant and alkali-resistant, weak in temperature sensitivity and excellent in physical and chemical performance.

The invention relates to a concrete pavement material for heavy traffic roads and a preparation method thereof. The material is composed of a component A, a component B and a component C in a mass ratio of 1:(0.2-0.6):(4-8). The component A comprises the following components in parts by mass: 40-80 parts of epoxy resin, 0-20 parts of epoxy reactive diluent, 10-50 parts of elastic modifier, 0.2 part of defoaming agent and 0.2 part of dispersing agent. The component B comprises the following components in parts by mass: 100 parts of curing agent, 0-10 parts of curing accelerator and 1 part of coupling agent. The component C comprises the following components in parts by volume: 100 parts of fine stone, 30-300 parts of fine sand, 130-800 parts of waste rubber particle, 50-100 parts of waste rubber powder and 10-20 parts of crystal whisker. Compared with the prior art, the concrete pavement material for heavy traffic roads has the advantages of high strength, favorable durability, favorable roadability, energy saving, environment friendliness and the like, and is convenient for construction.

The invention discloses polyvinyl alcohol/inorganic nanocomposite hydrogel, which is characterized by being formed by the following components: 30-90 parts by weight of polyvinyl alcohol and 0.1-20 parts by weight of inorganic nanocomposite particles through a chemical crosslinking gel method, wherein the inorganic nanocomposite particles comprise nano clay, nano mica powder, a nano molecular sieve, nano wollastonite, nano graphite, nanosilicon dioxide or a carbon nano tube. With the adoption of the polyvinyl alcohol/inorganic nanocomposite hydrogel, the mechanical strength of polyvinyl alcohol hydrogel is enhanced on the basis of not influencing the moisture of the hydrogel, the service life is prolonged, the permeability of the polyvinyl alcohol hydrogel is improved, and a channel is reserved for transmission of matters. As the selection of the materials, the production cost is controlled, and the better economic benefit is brought. The invention also discloses a preparation method of the polyvinyl alcohol/inorganic nanocomposite hydrogel. The preparation method is simple and feasible to operate and good in mechanical strength, and can be produced industrially.

The present invention discloses a preparation method of nylon micro powder for selective laser sintering, the method is as follows: in the manner of dissolution-precipitation, first a dispersant is introduced into a polymer good solvent system, a poor solvent is added for precipitating of a polymer, and by use of the interaction of the dispersant and polymer chains in the system and particle stability protective effect, well dispersed polymer microspheres can be obtained. A used solvent and the used dispersant both can be recycled, compared with the prior art, no high-temperature high-pressure equipment is used, the process is simple, and the preparation method is cost-effective, environmentally-friendly and easy to implement. According to the method, the nylon powder for selective laser sintering with excellent physical and chemical properties can be obtained, the nylon powder has good particle shape and liquidity, larger sintering window, and better heat resistance and thermal stability, and can meet the needs of SLS parts in the aerospace, automotive, medical equipment, electronic equipment, machinery mold, art work and other fields.

The invention relates to a stuffing for a capacitor. The stuffing for the capacitor, according to the quality percentage, comprises 20% to 40% of vegetable oil, 2% to10% of paraffin, 45% to75% of stuffing, and 0.5% to 5% of vegetable oil antioxidant additives. The preparation method of the stuffing for the capacitor includes the following procedures: the vegetable oil is heated up to 80 DEG C to 120 DEG C, is under vacuum treatment at least 8 hours, then breaking the vacuum, is added into vegetable oil antioxidant additives, and is under vacuum treatment again at least 8 hours with the temperature keeping in the range of 80 DEG C to 120 DEG C. The paraffin is heated up to 70 DEG C to 120 DEG C to melt. The stuffing for the capacitor can be obtained through mixing the vegetable oil after the heat treatment, melted paraffin and the stuffing together. The stuffing for the capacitor has electrical performance and physics and chemistry performance.

The invention discloses a ceramic large plate of an anhydrous glaze line all-digital jet printing process. The large plate comprises a bottom blank layer and a surface pattern layer; the surface pattern layer consists of a jet printing bottoming layer, a jet printing pattern layer, a jet printing protection layer/or a jet printing glue layer bonded with a dry particle layer in sequence from bottomto top; and the bottoming layer, the pattern layer, the protection layer/or the glue layer are formed by digital jet printing through a ceramic ink jet printer. The ceramic large plate and a manufacturing method thereof on a glaze line hardly need manual operation in the whole process for all-digital jet printing of the ceramic large plate and a sheet thereof; the texture is rich; the yield is increased; and anhydrous scene production environment is more accordant with modern green and intelligent manufacturing.

This invention relates to the method of preparing shallow color terpene resin through positive ion polymerization, then preparing colorless terpene resin through catalytic hydrogenation. The preparation process is: makes the ª‡-pinene, beta-pinene or dipentene obtained from fat turpentine or rectified fat turpentine as raw material, and obtain shallow color terpene resin through positive ion polymerization with proper catalyst and temperature, then catalyzation hydrogenate the obtained terpene resin to get colorless terpene resin. The purpose of the invention is to control the polyreaction speed through controlling the activeness of the catalyst in tepene resin preparation by positive polymerization, finally obtain terpene resin of shallow color, high softening point and obtaining rate; use carbon as catalyst, hydrogenate terpene resin under mild condition to get colorless terpene resin.

The invention discloses an amylum category complete biodegradable material and a preparation method thereof. The amylum category complete biodegradable material comprises, by weight, the long-chain branch aliphatic polyester or long-chain branch aliphatic series- aromatic copolyesters 50-70%, the starch 20-30%, the chain extender 0.1-3% and the balance chain extender 9-17%. The preparation method comprises the steps of enabling all components to be mixed in a high speed mixer, feeding in a twin-screw extruder after accurate measurement by means of a measurement scale, and extruding and prilling by adjusting a built-up sequence of a screw and designing different exhaust ports. The amylum category complete biodegradable material and the preparation method of the amylum category complete biodegradable material solve the problems of dispersing, plasticizing and exhausting of starch filler in the twin-screw extruder, and obtained amylum complete biodegradation material not only has complete biodegradation performance, but also has excellent mechanical property and good extrusion molding working quality.

The invention discloses a waterproof glue for external wall ceramic tile, which is formed by formulating acrylic emulsion, ethylene glycol, film forming auxiliary (dodecyl ester), alkali swelling thickener, antiseptic and defoaming agent, the waterproof glue has the advantages of being waterproof, joint-filling, transparent, rich in elasticity, environmentally-friendly, bright and clean, simple and convenient in applying, etc., and is free from toxicity, odor and new pollution even in case of the long-term use thereof and is also age resisting, therefore, the waterproof glue for external wall ceramic tile is an ideal product for environmental protection.

The invention discloses an organic silicon composition and application thereof. The organic silicon composition comprises at least one vinyl siloxane polymer capable of curing by silicon hydrogenation addition reaction, at least one hydrogen-radical siloxane polymer, at least one vinyl POSS (polyhedral oligomeric silsesquioxane), organic-group-modified nano silicon dioxide, a silicon hydrogenation addition curing catalyst and other basic components, and can further comprise a silicon hydrogenation addition reaction inhibitor, a binding accelerator and the like. The organic silicon composition has favorable physical and chemical comprehensive properties (including favorable flowability, high curing speed, high curing ratio, high curing hardness, high light transmittance and the like), has the characteristics of high vulcanization resistance, low aging speed, stable performance and the like, is suitable to be used as binding and packaging materials for optical and electronic devices, and is especially suitable to be used as a packaging material for LEDs (light-emitting diodes) and other semiconductor light-emitting elements.

The invention relates to a ramee/terylene double woven fabric used for wall cloth and window blind fabrics, which comprises a surface layer and an inner layer, wherein, the surface layer is weaved by ramee yarns and the inner layer is weaved by terylene yarns, or the surface layer is weaved by terylene yarns and the inner layer is weaved by ramee yarns, and the surface layer and the inner layer are bond into a whole by binding joints which are not exposed on the right side and the reverse side of the fabric. The preparation method of the ramee/terylene double woven fabric adopts the ramee yarns and the terylene yarns as raw materials, and comprises a preparation procedure and a weaving procedure, and the fabric is prepared by adopting a shuttleless loom or loom with shuttles according to selected structure. When weaving by adopting the shuttleless loom, the preparation procedures of the warp comprise the steps of twist setting, winding, warping, warp sizing and warp gaiting, and the preparation procedures of the weft comprise the steps of twist setting and winding; and when weaving by adopting the loom with shuttles, the preparation procedures of the warp comprise the steps of twist setting, winding, warping, warp sizing and warp gaiting, and the preparation procedures of the weft comprise the steps of twist setting, winding and weft winding.

The invention provides a preparation method of a magnetic wood, which is characterized in that magnetic material Fe3O4 is synthesized to holes of the wood by using an in-situ chemical synthesize method of pretreatment, dipping with ferric salt solution, hydrolysis and drying to prepare the synthesized magnetic wood with better magnetic performance. The preparation method of the invention has simple operation and low cost and the magnetic wood prepared by the method show good physical and chemical performance, thereby having wider application scope, for example, being used for absorption and screening of electromagnetic wave, etc.

The invention discloses a diatomite compound SBS (Styrene Butadiene Styrene) modified asphalt and a preparation method thereof. The diatomite compound SBS modified asphalt is prepared from the following materials in percentage by weight: 85%-90% of matrix asphalt, 3%-6% of thermoplastic styrene-butadiene rubber (SBS), 1%-6% of diatomite, 1%-5% of rubber oil, 2% of sulphur, the sum of the materials in percentage by weight being 100%. The preparation method comprises the following steps of: heating up the matrix asphalt to 180 DEG C, and then adding SBS modifying agent, diatomite and rubber oil in percentage by weight to obtain mixture; uniformly mixing the mixture; stirring for six hours at the temperature of 170 DEG C to 175 DEG C; and adding 2% of sulphur and stirring the mixture for one hour to obtain the product. Compared with the prior art, the preparation method has the advantages that the softening point of the modified asphalt obtained by the method disclosed by the invention is improved by 10%, and the production cost of the modified asphalt with high softening point is saved. Therefore, the modified asphalt product can be used as an ideal pavement material for road engineering in a high-temperature region.

The invention discloses a polyurethane artificial leather processing technology which comprises the following steps: firstly blending and uniformly stirring polyurethane resin, calcium carbonate powder, wood powder, color paste, DMF (dimethyl formamide) and a leather auxiliary, coating the mixture on one surface of a piece of base cloth, repeatedly washing with water and extruding, coating the mixture of the resin, the color paste, the DMF and methyl ester on one surface with a pattern of release paper, adhering the pattern surface of the release paper and a coating surface of a wet process base, drying at the temperature of 130 DEG C, cooling, and separating the release paper from the base to obtain the artificial leather. The leather produced through the processing technology provided by the invention has excellent air permeability and moisture penetrability.

The invention discloses preparation and application of a floatable magnetic hollow material for removing heavy metal in water and soil. Agricultural wastes of musaceae, such as banana, dried-up leaves, corn dried-up leaves and rice husks are combined with alginate to prepare the floatable magnetic hollow material containing nanometer ferroferric oxide and nanometer ferrous chloride, and the floatable magnetic hollow material is applied to remove the heavy metal in the water and the soil, so that not only is the resource utilization of the agricultural wastes developed, and a new way is opened for farmer income increase, but also the prepared nanometer ferrous chloride and nanometer ferroferric oxide and a high-quality porous biological carbon material have a high-efficient heavy metal adsorption capability, the hollow material with magnetism and floated on a water surface can be conveniently recovered, and the heavy metal in the water and the soil is removed. The floatable magnetic hollow material provided by the invention is wide in application range, can be used for renovating the water with heavy metal pollution such as urban or industrial sewage, rivers, pools and lakes, and can be also used for renovating the soil with heavy metal pollution such as rice fields, water vegetable fields and green plant fields.

The invention discloses a chitosan composite gel water purifying agent, which is gel prepared from solution of chitosan, cellulose, silica gel and activated carbon according to the mass ratio of 1:1-2.5:2-3.5:3-5. The invention also discloses a method for preparing the chitosan composite gel water purifying agent, which comprises the following steps of: adding the cellulose, the silica gel and the activated carbon into the solution of chitosan in turn; fully stirring at a high speed until black and homogeneous semifluid gel is formed, and obtaining the chitosan composite gel water purifying agent. The water purifying agent is natural and nontoxic, has functions of high-efficiency adsorption and flocculation, can be used for deep purification of an underwater environment polluted by endocrine disruptors and also can be used for emergency treatment in public health water pollution emergency. Meanwhile, the preparation method makes operation simple, reduces cost and is environmentally-friendly and suitable for industrial production.

The invention discloses erbium neodymium ion co-doped tellurium fluoride glass for emitting 2.7 microns of intermediate infrared light. The glass comprises the following components in the range of mole percent: 55-65% of TeO2, 10-20% of GeO2, 0-20% of ZnO, 0-5% of Na2O, 0-20% of ZnF2, and 0-5% of NaF, and 0.5-1% of RE2O3, (RE is rare earth elements Er and Nd). The glass is prepared by a melting method of a corundum crucible and a silicon carbide rod electric furnace. The glass is transparent, not easy to devitrify, high in near infrared transmittance near 2708nm, and excellent in physical and chemical properties; the stability parameter delta T is greater than or equal to 140 DEG C; a strong 2.7 microns of intermediate infrared fluorescence can be obtained under pumping of a laser diode with 808nm of wavelength; and the glass is suitable for preparation and application of special glass doped with erbium ion for emitting 2.7 microns of intermediate infrared light and an optical fiber material.

The invention belongs to the field of high molecular materials, and relates to a nylon blended polyethylene powder material for use in selective laser sintering (SLS). The material is prepared from the following components in parts by weight: 700-800 parts of nylon, 200-300 parts of polyethylene, 5-15 parts of a surfactant, 10-100 parts of a bulking agent and 30-200 parts of filler. A preparation method of the nylon blended polyethylene powder material comprises the steps of powder preparation, surface treatment, modification and sieving. Nylon blended polyethylene powder prepared by using the method is good in particle shape and high in fluidity; and meanwhile, a larger sintering window is provided. The mechanical property, surface roughness and the like of the material are improved effectively; and meanwhile, the nylon blended polyethylene powder material has superior physical and chemical properties and appearance quality, and can meet the SLS workpiece requirements in the fields of aviation, automobiles, medical instruments, electronic instruments, mechanical molds, artworks and the like.

The invention belongs to the technical field of fireproof blocking materials and preparation thereof, and particularly relates to an expanded organic fireproof blocking material and a preparation method thereof. The organic fireproof blocking material comprises the following raw materials in parts by mass: 150-220 parts of an inorganic filler, 10-20 parts of high-alumina aluminum silicate cellucotton, 5-14 parts of expanded graphite, 108-130 parts of an organic fireproof adhesive and 8-12 parts of a diluent which are mixed together. The fireproof blocking material has remarkable fireproof and insulating effects, can reach the A3 grade in the GB23864-2009 Fireproof Blocking Material, has favorable physical and chemical properties and superior weatherability, can adapt to various holes, openings, gaps and the like in practical application, facilitates construction, maintenance and replacement, and can effectively prevent flame and smoke on fire scenes from diffusing and spreading through holes and gaps in walls.

The invention belongs to the technical field of material chemistry, and particularly relates to a method for in-situ preparing a nano-silver compound bactericide. The method is that a hydroxyapatite nano assembled ball chain with the length of micron order is taken as a carrier, the characteristics of the large surface area and high surface activity of the hydroxyapatite nano assembled ball chain are utilized, silver ions are converted into nano-silver on the hydroxyapatite surface through in-situ reduction reaction, so a hydroxyapatite/silver compound bactericide is prepared. The nano-silver compound bactericide has high chemical stability, good recovery performance, and can effectively kill various bacteria, the bactericidal efficiency is greatly improved because of the larger surface area of the nano-silver compound bactericide, under the premise of realizing the same bactericidal effect, the bactericide usage can be saved by about 30-40% compared with pure nano-silver, and the nano-silver compound bactericide has very strong industrial practicability.

The invention discloses a method for manufacturing artificial marble by using fly ash and waste glass. The method comprises the steps of mixing and milling raw materials, clearing up a mold, making a surface layer, making a base layer, demolding, curing and the like. The method for manufacturing the artificial marble by using the fly ash and the waste glass as main raw materials has the remarkable characteristics of extensive raw material sources, energy conservation and environment friendliness; and by using high-aluminum cement as an adhesive, boards of the surface layer and the base layer can be fastened, the artificial marble has good physical and chemical properties, and patterns on the surface of the artificial marble are as bright as a mirror. The method is simple and low in manufacturing costs of process equipment and raw materials, and has the characteristics of low production cost, low investment, high benefit and the like.

The invention provides an alcohol acid resin, a preparation method of the alcohol acid resin and an anti-corrosion paint using the alcohol acid resin, relates to an anti-corrosion paint, and aims to solve the technical problem of workpiece surface rusting corrosion caused by corrosion of equipment surface due to processing solution and air. The alcohol acid resin is prepared by trimethylolpropane, phthalic anhydride, adipic acid anhydride and isononanoic acid. The anti-corrosion paint using alcohol acid resin consists of alcohol acid resin, ethenyl resin, ethenyl triethoxysilane and dryer W-2000B. The anti-corrosion paint provided by the invention is excellent in physical and chemical properties, namely a coat film has no change since being subjected to salt mist for 100h, the coat film has no change since being subjected to water for 360h, the coat film de-colors lightly since being subjected to manual aging for 100h, and the compact is 50Kgcm, the toughness is 1mm, and the adhesive force is of 1 grade.

Disclosed is a low-odour acrylonitrile-butadiene-styrene copolymer complex comprising the raw materials (by weight ratio) of ABS 100 and molecular sieve material 0.001-0.01, toughening agent 0-5, anti-oxidant 0.2-2.0, ultraviolet light absorbent 0-2.0, free radical quenching agent 0-2.0, pigment and lubricating agent 0-5.0, wherein the molecular sieve material being a alkali metal aluminosilicate powder of sodium type crystal structure with the chemical formula of Na86[(AlO2)86(SiO2)106]*XH2O, the toughening agent being a high colloid AB comprising rubber 50-70 wt%, acrylic nitrile 5-20 wt%, phenylethene 25-30 wt%.

The invention relates to a total-effect clothing pre-washing agent free from an organic solvent. The organic solvent has different degrees of toxic actions to the human body, is combustible and easy to explode, pollutes the environment and has obvious limitation. The total-effect clothing pre-washing agent disclosed by the invention is prepared from an anionic surfactant, a nonionic surfactant, an emulsifier with an HLB value of 5-13, aids, a short chain surfactant, a pH value regulator, a hydrotropic agent, a preservative, essence and water, wherein the emulsifier with the HLB value of 5-13 replaces a common organic solvent and is scientifically compatible with detergents and other aids, oily dirt is removed in emulsifying and dispersing modes, the ratio of the emulsifier to the detergent is between 1:10 and 2:1, an effect of removing multiple stains is achieved, and the stain removal ratios of standard carbon black stained cloth, protein stained cloth and sebum stained cloth are all over 1.0.

The invention relates to a multicolor infrared low-emissivity environmental protection coating. The coating comprises a component A and a component B, and when in use, the component A and the component B are uniformly mixed according to the mass ratio of 1:10. The component A is aliphatic polyisocyanate; the component B comprises the following components in percent by mass: 20 to 30 percent of fluorocarbon resin, 35 to 50 percent of special pigment, 0 to 5 percent of filler, 1 to 5 percent of a dispersant, 0.1 to 1 percent of a flatting agent; 3 to 8 percent of a directing agent, 0.01 to 0.3 percent of a drier, and 15 to 25 percent of a mixed solvent, wherein the special pigment comprises the following pigments: 0 to 10 percent of titanium dioxide rutile, 0 to 5 percent of 1, 4 diketopyrrolopyrrole series organic red pigment, 0 to 25 percent of chromium oxide green, 0 to 8 percent of titanium-nickel yellow pigment, 0 to 5 percent of black pigment, and 50 to 95 percent of coated color metallic pigment. The average emissivity of the thermal infrared band of the coating is 0.40 to 0.65, and the heavy metal content meets the requirement.