52results about How to "Improve anti-settling" patented technology

The invention relates to a polyurea type anti-settling agent. A preparation method of the polyurea type anti-settling agent comprises the following steps: reacting hydroxyl acrylic resin and a diisocyanate compound solution at the temperature of 40-60 DEG C for 1-3 hours, cooling to the temperature of 0-40 DEG C, reacting with an amine compound solution for 1-2 hours, cooling and discharging to obtain polyurea grafted acrylic resin, wherein the solid content is 45-55wt%, and the urea bond content is 3.0-4.5wt%; and grafting the polyurea structure to a side chain of a hydroxyl acrylic resin molecule, wherein the various raw materials comprise the following components: 70-90wt% of hydroxyl acrylic resin, 5-15wt% of diisocyanate compound solution and 5-15wt% of amine compound solution. The anti-settling agent is transparent liquid, has the thixotropic behavior, is good in anti-settling effect and convenient to charge and can be used for single-component high-temperature baking coatings, two-component polyurethane coatings and single-component thermoplastic coatings, and the glossiness and distinctness of the coating are not influenced.

The invention discloses sunlight heat-reflection, heat-insulation and heat-preservation sand-in-water colored environment-friendly coating and a preparation method thereof. The sand-in-water colored environment-friendly coating is formed through four stages including a colloidal solution, a gel solution, granulated basic paint and finished-product paint; a water-based acrylic copolymer dispersionbody is used as a main body; after the main body is naturally dried to form a paint film, the paint film has good weather resistance, anti-staining performance, waterproof performance, chemical resisting performance, self-cleaning performance, is safe and environmentally friendly and has a wide applicable range; a gel agent is added, so that the constructability, stirring performance, transportability, anti-settling performance, particle shredding resisting performance and whole storage stability of the coating are effectively improved; ceramic hollow microspheres are added into the coating sothat residual sunlight radiation energy which permeates into a wall body can be further separated; each ceramic hollow microsphere is a thin-wall single hollow sphere body, is similar with a double-layer glass effect and has heat-reflection, heat-insulation and heat-preservation effects, so that the heat-insulation and heat-preservation performance of the coating is greatly improved.

The invention discloses a construction method for a shallow depth bored tunnel to penetrate through a box culvert. The method comprises the following steps of construction preparation, construction of a preparation section, determination of the size of a box culvert section, construction of a sagging transitional section, construction of the box culvert section, construction of an upward-tilting transitional section, construction of an ending section, inspection of the supporting strength, and restoration of normal excavation of the constructed tunnel. The transition sections of the tunnel are short, the bottom of the tunnel is unchanged in excavation depth, only the shape of the section of the tunnel is changed, the influence of the existing box culvert on tunnel construction is ingeniously avoided, and the construction progress is guaranteed on the premise that the construction safety is guaranteed.

The invention belongs to the technical field of coatings, and particularly relates to an epoxy resin modified polyurethane waterproof coating which is prepared from the following components in parts by weight: 30-50 parts of epoxy modified polyether polyol, 10-20 parts of a polyisocyanate monomer, 10-20 parts of a plasticizer, 30-50 parts of a solid filler, 1-5 parts of a latent curing agent, 0.3-3 parts of a catalyst, 0.1-2 parts of a defoaming agent and 1-5 parts of an anti-sagging agent. The epoxy resin modified polyurethane waterproof coating has the following beneficial effects: (1) E-51epoxy resin is used for graft modification of the polyether polyol mixture, so the viscosity of the coating system is improved; (2) the modified solid filler and polyether have a relatively strong bonding effect, so that the sedimentation resistance and sagging resistance are further improved; and (3) the coating system prepared by the invention greatly improves the process performance and the mechanical property by modifying various components.

The invention relates to modified epoxy-connected paint and a preparing method thereof. An A component of the paint is prepared by adding epoxy resin into a mixed solvent of xylene, n-butanol and cyclohexanone, adding copolymer of vinyl chloride and vinyl isobutyl ether, chlorinated rubber, acrylic resin, wet-method sericite, mica iron oxide, fumed silica, talcum powder, titanium dioxide, a polymethylalkyl siloxane solution and polyamide wax, mixing, stirring, and grinding. A B component of the paint is prepared by mixing a cashew nut shell oil modified phenolic aldehyde amine curing agent and a phenolic aldehyde amine curing agent, and stirring uniformly. During using, the A component and the B component are mixed uniformly. The paint can be used for intermediate paint of anti-corrosive primer, and antifouling paint, or chlorinated rubber finish or decorative finish so as to ensure good adhesive force.

The invention discloses a curing agent for epoxy anticorrosion primer, prepared from, by weight, 30-58% of polyamide resin, 1-2% of graphene oxide, 0.1-0.2% of dicyclohexyl dicarbodiimide, and 40-68% of a mixed diluent. The curing agent for epoxy anticorrosion primer has good anti-settling and anti-agglomeration functions and has good anticorrosion property.

The invention discloses a pure aqueous emulsion type high-hard wood wax oil. The pure aqueous emulsion type high-hard wood wax oil is prepared from, by mass, 50-70% of a vegetable oil modified acrylicemulsion, 1.5-3% of water-based polyamide wax, 10-15% of water-based polytetrafluoroethylene modified polyethylene wax, 10-18% of water-soluble alcohol, 1-3% of an aqueous drier, 0.2-0.3% of a waterborne preservative, 0.3-0 .7% of an aqueous defoamer and 7-10% of water. The pure aqueous emulsion type high-hard wood wax oil has the advantages that a water-based formula is adopted, no volatile organic solvent is contained, the pure aqueous emulsion type high-hard wood wax oil is safer to the human body and more environmentally friendly, does not settle, has good hand feeling, and has excellenthardness and scratch resistance.

The invention belongs to the technical field of coatings, and relates to a weather-resistant ultraviolet curing solvent-free spraying open transparent primer. The weather-resistant ultraviolet curing solvent-free spraying open transparent primer comprises the following components in percentage by mass: 10-30% of urethane acrylate resin, 10-20% of polyester acrylic resin, 0.1-0.3% of an antifoaming agent, 0.2-1% of a wetting dispersant, 0.1-1% of a leveling agent, 0.1-0.5% of a base material wetting agent, 2-5% of a first photoinitiator, 2-5% of a second photoinitiator, 0.1-0.5% of a thixotropic agent, 0.1-1% of fumed silica, 5-20% of talcum powder, and 40-60% of a UV reactive diluent. The UV primer is safe, environmentally friendly, low in VOC content, good in construction performance, capable of being recycled and excellent in paint film performance.

The invention discloses a low-VOC high-corrosion-resistance environment-friendly epoxy coating material, which is prepared from the following components, by mass, 20-25% of epoxy resin, 1.5-2% of petroleum resin, 5-8% of methyl isobutyl ketone, 1-2% of polyamide wax, 0.5-0.8% of a wetting dispersant, 0.2-0.4% of an acrylate defoaming agent, 4-6% of titanium dioxide, 0.2-0.4% of iron oxide yellow, 0.3-0.5% of carbon black, 25-35% of aluminum oxide, 25-35% of feldspar powder, 2-3% of n-butyl alcohol, 0.3-0.6% of methylsilane and 3-5% of a reinforcing filler, wherein the reinforcing filler is a TiO2 / ZIF-8 composite material modified by a polymer. The invention also discloses a preparation method of the epoxy coating material. The prepared epoxy coating material is low in VOC content, good in stability, good in corrosion resistance and excellent in mechanical property.

The invention discloses a preparation method of a green environmental-protection attapulgite anti-sedimentation adsorbent for buildings, wherein the preparation method includes the steps: selecting: selecting natural mineral attapulgite clay and processing to obtain an attapulgite clay raw material; pretreatment: pouring the attapulgite clay raw material into a grinding device, grinding, after grinding into powder, pouring into molecular sieve, and screening; screening: selecting the attapulgite clay with the particle size of 2 mm-4 mm; decomposition: putting the selected attapulgite clay withthe particle size of 2 mm-4 mm into a stirrer, adding an acidic solution in a proportion of 11-45%, and then stirring evenly; filtering: stirring for a certain period of time, then pouring into a filter sieve, filtering, and removing impurities contained at the interior and the surface, to obtain a suspension; activating: heating and activating the suspension, and activating the suspension with azinc chloride solution with the concentration of 1-1.5 mol / L to obtain an attapulgite clay system; and roasting, discharging, cooling, cleaning, drying, grinding, sieving and preserving.

The invention relates to the technical field of municipal engineering and particularly relates to a round-gallery multi-bin type underground comprehensive pipe gallery. The round-gallery multi-bin type underground comprehensive pipe gallery comprises a pipe gallery main body, wherein the section of the pipe gallery main body is round; the upper-part space of an inner cavity of the pipe gallery main body is an intelligent and ventilating space of the pipe gallery; cable placement platforms are respectively arranged at the middle parts of the inner walls of the left side and the right side of the pipe gallery main body; a left-side branched bin and a right-side branched bin are respectively arranged under the cable placement platforms at the left side and the right side; a plurality of independent pipeline installing bins are arranged at the lower part of the pipe gallery main body. The round-gallery multi-bin type underground comprehensive pipe gallery has the advantages that the roundpipe gallery is superior to the square-shaped pipe gallery in the aspect of practical space, the arrangement of the branched bins is reasonable, the stability of pipelines in the independent pipelineinstalling bins is more reliable, and the cost can be reduced; the interior of the pipe gallery is more convenient to maintain; the bearing capability and the whole antisettling property of the top part of the round pipe gallery are superior to those of the square-shaped pipe gallery, and the antisettling property and the pipe-joint leakage preventing property are excellent; the construction timecan be greatly shortened and the engineering cost is low.

The invention belongs to the technical field of cigarette mouth glue, in particular to cigarette mouth glue with good wet viscosity and shear resistance and a preparation method thereof. The cigarettemouth glue is synthesized by using an ethylene-vinyl acetate copolymer emulsion as the main raw material, polyethylene glycol as a dispersion medium, a polyvinyl alcohol aqueous solution as a colloidprotective agent, and a modified polyurethane thickener, a non-silicone antifoaming agent, a 2,2,4-trimethyl-1,3-pentanediol diisobutyrate plasticizer, a buffer solution and the like as adjuvant materials. The cigarette mouth glue belongs to a water-based adhesive. The invention has the following beneficial effects: the cigarette mouth glue is suitable for tipping of tipping paper on a high-speedcigarette making machine, and suitable for roll coating of the cigarette equipment; clean operation of machines is guaranteed; and the preparation method is beneficial to high shear viscosity.

The invention discloses anion environment-friendly coating and a preparation method thereof. The anion environment-friendly coating comprises the following ingredients in parts by weight: 100-150 parts of fluorosilicon resin, 50-60 parts of amino resin, 40-50 parts of hydroxyalkyl starch, 15-30 parts of diatom ooze, 30-40 parts of plant extract, 50-60 parts of anion powder, 20-30 parts of nano-titanium dioxide, 30-40 parts of modified CNTs (carbon nano tubes), 20-30 parts of nano-silicon dioxide, 3-5 parts of amber sand, 15-25 parts of ceramic carbon balls, 1-2 parts of isopropyl triisostearoyltitanate and 1-2 parts of carboxymethylcellulose. The coating has the characteristics of being anti-aging, non-scaling and non-discoloring, being strong in weather resistance, being non-toxic and tasteless and being good in flatting and easy in construction, is resistant to washing, is non-toxic and harmless, is fresh in smell and has a health-care effect.

The invention provides a nano-silica modified styrene-acrylic external wall composite thermal insulation coating and a preparation method thereof. The coating is prepared from the following componentsin parts by weight: 50-70 parts of styrene-acrylic emulsion, 10-20 parts of xonotlite powder, 5-8 parts of hollow glass beads, 8-12 parts of titanium dioxide, 4-5 parts of ultrafine aluminum carbonate powder, 10-20 parts of talcum powder, 2-4 parts of nano-silica, 0.8-1.2 parts of an anti-mildew bactericide, 0.4-0.8 parts of a wetting agent, 0.3-0.5 part of a dispersant, 0.5-0.9 parts of a defoamer, 1.5-2.5 parts of a coalescing agent, 0.8-1.2 parts of a thickener, 4-8 parts of an antifreezing agent, 0.1-0.3 parts of a PH regulator and 30-50 parts of deionized water.

The invention provides a solid lubricating protective coating as well as a preparation method and application thereof, and belongs to the technical field of surface coatings. Epoxy resin and cashew nut oil modified phenolic resin are used as matrix resin, NH2-POSS and GO are used for modifying the matrix resin from the molecular level, molybdenum disulfide is used as a solid lubricant, organobentonite, dibasic lead phosphite, cerium trifluoride and antimony trioxide are used as functional fillers, a mixed solvent is used as a dispersion medium, the corrosion-resistant solid lubricating protective coating with high bearing capacity and long service life is obtained. The coating has good adhesion to a metal substrate, has strong impact resistance and toughness, has the Falex wear-resistant life of not less than 450 minutes under the load of 4450 N, has the bearing capacity of 11200 N, has the protection capacity of protecting a carbon steel test piece against a 100-hour salt spray test, has good aluminum corrosion resistance, medium resistance and thermal stability, and the performance can meet the index requirements specified by the American military specification MIL-L-46010E.

The invention discloses sunlight heat-reflection, heat-insulation and heat-preservation sand-in-water colored environment-friendly coating and a preparation method thereof. The sand-in-water colored environment-friendly coating is formed through four stages including a colloidal solution, a gel solution, granulated basic paint and finished-product paint; a water-based acrylic copolymer dispersionbody is used as a main body; after the main body is naturally dried to form a paint film, the paint film has good weather resistance, anti-staining performance, waterproof performance, chemical resisting performance, self-cleaning performance, is safe and environmentally friendly and has a wide applicable range; a gel agent is added, so that the constructability, stirring performance, transportability, anti-settling performance, particle shredding resisting performance and whole storage stability of the coating are effectively improved; ceramic hollow microspheres are added into the coating sothat residual sunlight radiation energy which permeates into a wall body can be further separated; each ceramic hollow microsphere is a thin-wall single hollow sphere body, is similar with a double-layer glass effect and has heat-reflection, heat-insulation and heat-preservation effects, so that the heat-insulation and heat-preservation performance of the coating is greatly improved.

The invention provides a PCB character ink-jet nano color paste, and the paste comprises the following components: 20-70 parts of acrylate monomer; 3-15 parts of a dispersing agent; 30-75 parts of titanium dioxide; 3-15 parts of aluminum hydroxide; and 0-1 part of an auxiliary agent. According to the color paste, the acrylate monomer is used as a main component and cooperates with the dispersing agent, the titanium dioxide and the aluminum hydroxide to act, and based on the synergistic effect of the titanium dioxide and the aluminum hydroxide, the adhesiveness of the acrylate monomer can be improved, the stability and the anti-settling property of the obtained PCB character ink-jet nano color paste are improved, the excellent performance of the color paste is ensured, the service life is prolonged, and the paste is not prone to falling off in the using process, does not have the layering or bottom sinking phenomenon after being aged at high temperature for 14 days, is excellent in smoothness on a machine, and is beneficial to wide application.

The invention discloses application of glass powder to preparing PU matte varnish. The application is characterized in that the glass powder is firstly prepared into 30% glass slurry in which the glass powder is uniformly dispersed and not settled; then, the 30% glass slurry is applied to a varnish main agent component of the PU matte varnish, wherein dosage is 10%-20%; and the 30% glass slurry is prepared from the following components in percentage by weight: 47% of coconut oil fatty acid resin, 2% of methyl isobutyl ketone (MIBK), 8% of propylene glycol methyl ether acetate, 3% of a wetting dispersant (EFKA-4010), 30% of glass powder and 10% of propylene glycol methyl ether acetate, wherein the coconut oil fatty acid resin is coated with the glass powder and then uniformly suspended in a mixture, so that wetting performance of the glass powder is improved. The PU matte varnish disclosed by the invention is PU matte varnish which is environmental friendly, good in transparency, good in wear resistance and stable in gloss.

The invention discloses an unsaturated polyester material with excellent covering power, black edge covering capacity and combination property. The unsaturated polyester material is prepared from components in parts by weight as follows: 35-45 parts of PE resin, 2-4 parts of a 20% CAB551-0.2 solution (CAB551-0.220: BAC80), 0.2-0.4 parts of a dispersant, 1-3 parts of a polishing aid, 2-5 parts of an active solvent, 45-55 parts of inorganic filler, 0.2-0.4 parts of fumed silica, 0.2-0.5 parts of a polyamide wax dispersion rheological aid, 0.5-1.5 parts of 40% active content rheological aid, 0.5-1 part of a thickening rheological agent, 0.1-0.3 parts of a defoaming agent and 0.2-0.5 parts of a leveling agent. The unsaturated polyester material with excellent covering power, black edge covering capacity and combination property has excellent covering power and black edge covering capacity for special-shaped parts, chamfered objects and molded carved plates and has the characteristics of good leveling performance, good fullness and good rubbing property and the like of the unsaturated polyester material.

The invention relates to the technical field of water-based coatings, provides a corrosion-resistant water-based foliar texture effect paint as well as preparation and construction methods thereof andsolves the problem that a solvent coating in the art results in environment pollution and human health hazards and has great potential safety hazards in a production process. The corrosion-resistantwater-based foliar texture effect paint is composed of a component A and a component B, wherein the component A comprises the following ingredients in percentage by mass: 40-50% of water-based epoxy resin, 0-3% of film forming additives, 0-5% of epoxy diluent, 0-2% of defoaming agent I, 0-1% of oil-based bentonite, 0-2% of dispersing agent, 30-50% of cement and 0-20% of pigments and fillers; and the component B comprises the following components in percentage by mass: 50-60% of water-based curing agent, 30-40% of water, 0-1% of water-based bentonite, 0-1% of defoaming agent II, 0-1% of water-based wetting agent, 2-4% of film forming additives, 0-5% of antirust additives and 0-10% of water-based color paste.

The invention discloses an environment-friendly wood wax oil composition, which comprises the following components and mass percent: 45.2% of alkane solvent, 45% of linseed oil and tung oil resin, 0.5% of surfactant, 0.3% of thixotropic agent, and wax powder 5%, defoamer 2%, drier 2%. The wood wax oil of the present invention has the advantages of not containing harmful substances such as benzene, formaldehyde, and various heavy metals, and the construction is simple, and the construction can be completed without professional construction personnel. Shedding and other phenomena, with outstanding heat and cold resistance.

The invention discloses a dispersant used for a solvent based-paint, and an application method of the dispersant. The dispersant is a light yellow liquid with a density of 1.05 to 1.10, a viscosity greater than or equal to 300Mpa.s, and a pH value of 3 to 4. The application method of the dispersant is that: first, the dispersant is diluted by an organic solvent, wherein a volume ratio of the dispersant to the organic solvent is 1:1; the diluted dispersant is added to a pigment an a filling material, and the resulting material is grinded and dispersed, such that an emulsion is obtained; the emulsion is then added to the solvent-based paint, such that the paint can be used. According to the invention, with the dispersant, the dispersibility and anti-precipitation capacity of various phthalocyanin pigments and metal pigments in an organic phase can be improved; the system viscosity of inorganic substances in an organic phase is substantially reduced, and the filling amount of the inorganic substances is increased. With the method, the tinting strength and the reflectance of the paint can be improved, and the caking property of organic polymers to various metals, glasses, concretes and inorganic materials can be improved. With the method, the leveling effect of the paint is good, and the paint is sagging resisting.

The invention relates to a pile splicing fixing device adopting a pile planting method. The pile splicing fixing device adopting the pile planting method comprises a fixing mechanism, a locking mechanism, a tensioning mechanism and an anti-skid clamping mechanism, wherein the fixing mechanism is arranged above a steel casing and used for fixing a next section of pile, and the fixing mechanism comprises a set of two symmetrically-arranged annular steel plate fixing hoops; the locking mechanism is used for locking the two ends of the two annular steel plate fixing hoops, and the locking mechanism comprises an upper fixing rod and a lower fixing rod which are arranged according to the height; the tensioning mechanism is used for adjusting the relative distance between the upper fixing rod andthe lower fixing rod; and the anti-skid clamping mechanism is used for clamping a pile body of the next section of pile. According to the pile splicing fixing device adopting the pile planting method, locking installation can be effectively and conveniently conducted, locking can be conducted in place at a time, downward turning deformation of anti-skid rubber materials can be effectively prevented, the proper locking stroke of the annular steel plate fixing hoops can be effectively controlled, and therefore the anti-sinking effect of a prefabricated pipe pile is effectively and greatly improved, and the service life of the device is prolonged.

The invention relates to rectangular concrete piles used for constructing a side wall of a pipe gallery. Each rectangular concrete pile comprises a pile body (1) with the rectangular cross section. The rectangular concrete piles are characterized in that a plurality of middle anchoring ribs (2) protruding out of the front end face of each pile body (1) are arranged in the middle of the pile body (1). The middle anchoring ribs protruding out of the front end faces of the pile bodies are arranged in the middles of the pile bodies, a reinforcement framework structure inside a pipe gallery bottom plate can be conveniently constructed between the middle portions of the concrete piles through the exposed anchoring ribs, and thus the pipe gallery bottom plate is constructed; meanwhile, after pouring is completed, a continuous wall and the bottom plate are connected through the exposed anchoring ribs, and the wall and the pipe gallery bottom plate can be connected more firmly; and the continuous wall manufactured from the rectangular concrete piles can be used as a foundation pit enclosure during pipe gallery construction and also can be used as the wall of the pipe gallery, and walls on the two sides of the pipe gallery do not need to be constructed additionally.

The invention discloses an application of foamed light soil in repairing of building foundation subsidence holes. The application of the foamed light soil in repairing of building foundation subsidence holes includes the following steps: (1) density and strength of the foamed light soil to be used are determined according to height of a building above the subsidence holes; (2) waterproof geomembranes are paved on the bottom layers of the subsidence holes; (3) the foamed light soil with required density and strength is prepared at a construction site and poured in the building foundation subsidence holes, layered pouring is performed during pouring; and (4) the foamed light soil is used for filling the holes in a pouring mode, common surface soil is paved above the foamed light soil, and namely repairing operation is finished. The foamed light soil is used for repairing the building foundation subsidence holes, has the advantages of being high in fluidity and firmness rate, resistant to subsidence and the like, can fill the holes, and simultaneously is small in proportion. The problem of re-subsidence cannot occur after the holes are filled by the foamed light soil, and the foamed light soil is low in cost and suitable for popularization and application.

The invention provides a wind-resistant and overturn-preventing external expansion pole foundation for electric power. The pole foundation is arranged underground and used for supporting a pole, so that the pole has better wind-resistant, overturn-preventing and anti-pulling capacity; and the foundation can be reused during pole replacement or line transfer in the future, and investment is not wasted. The foundation is characterized in that the foundation is placed on the ground and directly driven or pressed underground after being straightened; a four-way expansion board is arranged at the lower part of the foundation and can be increased and decreased according to actual conditions, a nut is tightened to allow a two-way conical screw to rise, the expansion board expands in each direction, and the lower part of the expansion board is claw-shaped to strengthen the stability and anti-pulling capacity of the foundation; an inverted horn-shaped countersink is formed in the upper part ofthe foundation, and positioning bolts are arranged on the periphery of the upper part of the inverted horn-shaped countersink; and a heavy electric pole is placed in the inverted horn-shaped countersink, the lower end of the heavy electric pole is clamped at the bottom of the inverted horn-shaped countersink, the positioning bolts adjusts the vertical degree of the heavy electric pole, then, a wedge block is plugged in the inverted horn-shaped countersink to further fix the heavy electric pole, and finally, the countersink is filled with soil.

The invention discloses a composite anticorrosive pigment and a preparation method and application thereof, and belongs to the field of pigments, which comprises the following steps: reacting sodium silicate and sulfuric acid used as raw materials at normal temperature and normal pressure to synthesize low-water-pore low-oil-absorption silicon dioxide, sequentially adding a supersaturated calciumhydroxide solution, a phosphoric acid solution and calcium chloride into the system, uniformly stirring and mixing to obtain the composite anticorrosive pigment, coating with a wax emulsion, washing,drying and crushing to obtain the anticorrosive pigment with the average particle size of less than 5[mu]m. According to the preparation method, the whole process is normal temperature and normal pressure, a single anti-corrosion mechanism is broken through, design is comprehensively considered from the aspects of compact layer forming, calcium ion exchange and metal chelating, the production costis low, and the prepared anti-corrosion pigment is excellent in salt mist resistance. The main component of the anticorrosive pigment is low-water-pore low-oil-absorption silicon dioxide, the main component of the anticorrosive pigment is calcium phosphate, oxidized polyethylene wax and adsorbed calcium ions, the salt spray resistance is achieved by forming a compact layer, chelating phosphoric acid ions and exchanging part of calcium ions, and the salt spray resistance is excellent.

The invention discloses a preparation method and application of a composite anticorrosive paint, and belongs to the field of pigments. The preparation method comprises the following steps: 1) preparing a composite anticorrosive pigment: taking sodium silicate and sulfuric acid as raw materials, and reacting at normal temperature and normal pressure to synthesize low-water-pore low-oil-absorption silicon dioxide, sequentially adding a supersaturated calcium hydroxide solution, a phosphoric acid solution and calcium chloride into the system, uniformly stirring and mixing the mixture, coating themixture with a wax emulsion, washing and drying the mixture, and crushing the mixture to obtain the anticorrosive pigment with the average particle size of less than 5 [mu]m; 2) mixing 65-75 parts byweight of epoxy resin, 12-15 parts by weight of butyl acetate, 8-12 parts by weight of a composite anticorrosive pigment, 5.5 parts by weight of a drying agent and 0.5 part by weight of iron oxide red to prepare the anticorrosive paint. The whole process of the preparation method is carried out at normal temperature and normal pressure, wherein a single anti-corrosion mechanism is broken through,design is comprehensively considered from the aspects of compact layer forming, calcium ion exchange and metal chelating, the production cost is low, and the prepared anti-corrosion pigment is excellent in salt mist resistance.