Anticorrosive paint, preparation method thereof and anticorrosive coating

Abstract

The invention discloses an anticorrosive paint, a preparation method thereof and an anticorrosive coating. The anticorrosive paint is prepared from the following raw materials in parts by mass: 210 to 280 parts of vinyl-polyhedral oligomeric silsesquioxane modified acrylic resin emulsion, 20 to 30 parts of antirust filler, 30 to 50 parts of insulating filler, 60 to 80 parts of body filler, 3 to 10 parts of pigment filler, 3 to 5 parts of thickening filler, 80 to 100 parts of deionized water, 1 to 3 parts of auxiliaries and 0.3 to 0.5 part of drier. According to the invention, vinyl-polyhedral oligomeric silsesquioxane modified acrylic resin is used as a core film-forming substance, and an environment-friendly water-based system and a multifunctional filler are cooperatively designed, so that the anticorrosive coating with excellent long-term corrosion resistance, good mechanical property and environmental protection property is developed; the long-acting corrosion prevention and super-strong protection of the embedded channel in harsh environments such as bridges, tunnels, subways, nuclear power and ocean engineering are adapted, the cost is low, and the method has remarkable application value in the field of embedded channel protection.

Description

Technical Field

[0001] This invention relates to the field of anti-corrosion coating technology, and more particularly to an anti-corrosion coating, its preparation method, and the anti-corrosion coating layer. Background Technology

[0002] As a critical connecting component in infrastructure, embedded channels must operate in harsh environments such as humidity, salt spray, and stray currents for extended periods. Their corrosion resistance directly determines structural safety and service life. Currently, traditional corrosion protection measures for embedded channels mainly include hot-dip galvanizing, epoxy zinc-rich coating, glass flake coating, and polyurethane / fluorocarbon coating, but all of these measures have significant drawbacks. Hot-dip galvanizing offers strong initial rust prevention and low cost, but the zinc layer corrodes rapidly in high-salt environments (failing within 5-10 years in coastal areas), has poor adhesion to concrete and is prone to peeling, and fails to provide corrosion protection, making it susceptible to stray current corrosion. Epoxy zinc-rich coatings are easy to apply and offer good initial rust prevention, but the zinc powder is prone to oxidation, leading to a decline in long-term protection. The coating is also brittle, has poor impact resistance, and is prone to cracking. Glass flake coatings have excellent impermeability and are suitable for highly corrosive environments, but the application process is complex (requiring multiple layers), the coating lacks flexibility, and is prone to cracking due to substrate deformation, limiting their outdoor applications. Polyurethane / fluorocarbon coatings have excellent weather resistance and are suitable for outdoor environments, but their high cost makes large-scale application difficult, and their corrosion resistance decreases with aging, failing to meet long-term corrosion protection requirements.

[0003] The core challenges facing existing technologies include: ① Insufficient impermeability, allowing corrosive media such as water, chloride ions, and oxygen to easily penetrate the coating and cause electrochemical corrosion of the substrate; ② Imbalance between mechanical properties and durability, with high-hardness coatings being prone to brittleness and flexible coatings having poor wear resistance; ③ Failure to meet environmental standards, with traditional coatings containing high VOCs that pollute the environment and harm the health of construction workers; and ④ Economic contradictions, with high-performance coatings being expensive and ordinary coatings requiring frequent maintenance, leading to increased costs over the entire life cycle.

[0004] Therefore, there is an urgent need to provide a new anti-corrosion coating to solve the technical problems of poor long-term corrosion resistance, insufficient impermeability, weak mechanical properties, and failure to meet environmental protection standards of traditional pre-embedded channel anti-corrosion coatings. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an anti-corrosion coating, its preparation method and anti-corrosion coating, to solve the technical problems of poor long-term corrosion resistance, insufficient impermeability, weak mechanical properties and failure to meet environmental protection standards of traditional pre-embedded channel anti-corrosion coatings in the prior art.

[0006] In a first aspect, the present invention provides an anti-corrosion coating, the raw materials of which, by weight, include: 210-280 parts of vinyl-cage-type polysilsesquioxane modified acrylic resin emulsion, 20-30 parts of rust-preventive filler, 30-50 parts of insulating filler, 60-80 parts of extender filler, 3-10 parts of pigments and fillers, 3-5 parts of thickening filler, 80-100 parts of deionized water, 1-3 parts of additives, and 0.3-0.5 parts of drying agent.

[0007] Secondly, the present invention provides a method for preparing an anti-corrosion coating, comprising the following steps: mixing and dispersing a vinyl-cage-type polysilsesquioxane modified acrylic resin emulsion, rust-inhibiting filler, insulating filler, extender filler, pigment filler, thickening filler, additives, drier and water, and then grinding to a fineness ≤30μm to obtain an anti-corrosion coating.

[0008] Thirdly, the present invention provides an anti-corrosion coating, which is formed by applying the anti-corrosion coating provided in the first aspect of the present invention to the surface of a substrate and curing it.

[0009] Compared with the prior art, the beneficial effects of the present invention include: This invention uses vinyl-cage-type polysilsesquioxane modified acrylic resin as the core film-forming material, combined with an environmentally friendly water-based system and multifunctional fillers to develop an anti-corrosion coating that combines excellent long-term corrosion resistance, good mechanical properties, and environmental friendliness (low VOC). It is suitable for long-term corrosion protection and strong protection of pre-embedded channels in harsh environments such as bridges, tunnels, subways, nuclear power plants, and marine engineering, and is low in cost. It has significant application value in the field of pre-embedded channel protection. Attached Figure Description

[0010] Figure 1 These are photographs of the water contact angle of the anti-corrosion coating prepared in Example 1 of this invention; Figure 2 This is a photograph of the water contact angle of the anti-corrosion coating prepared in Comparative Example 1 of the present invention; Figure 3 These are optical photographs of the surface of the anti-corrosion coating prepared in Example 1 of this invention after 2000 hours of neutral salt spray exposure; wherein, Figure 3 The results shown are from multiple batches of repeatability tests for the same coating. All batches were prepared and tested under the same process conditions to evaluate the performance stability of the coating. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0012] In a first aspect, the present invention provides an anti-corrosion coating, the raw materials of which, by weight, include: 210-280 parts of vinyl-cage polysilsesquioxane modified acrylic resin emulsion (i.e., vinyl-POSS modified acrylic resin emulsion), 20-30 parts of rust-preventive filler, 30-50 parts of insulating filler, 60-80 parts of extender filler, 3-10 parts of pigments and fillers, 3-5 parts of thickening filler, 80-100 parts of deionized water, 1-3 parts of additives, and 0.3-0.5 parts of drying agent.

[0013] In this embodiment, the vinyl-cage-type polysilsesquioxane modified acrylic resin emulsion is prepared through the following steps: Vinyl-cage polysilsesquioxane, monomer, initiator and organic solvent are mixed and reacted to obtain vinyl-cage polysilsesquioxane modified waterborne acrylic resin; Vinyl-cage-type polysilsesquioxane modified waterborne acrylic resin is neutralized with a neutralizing agent and emulsified with water to obtain a vinyl-cage-type polysilsesquioxane modified acrylic resin emulsion.

[0014] Preferably, the monomers include acrylate monomers and styrene (ST). The inventors discovered during experiments that introducing styrene can improve the coating's drying properties, hydrophobicity, corrosion resistance, and hardness.

[0015] More preferably, the acrylate monomer is selected from at least one of isobornyl methacrylate (IBOMA), butyl acrylate (BA), ethyl acrylate (EA), diethylene glycol dimethacrylate (DEGDMA), methyl methacrylate (MMA), and hydroxyethyl methacrylate (HEMA).

[0016] More preferably, by mass percentage, the monomers include: 75% to 85% acrylate monomers and 15% to 25% styrene.

[0017] More preferably, by mass percentage, the monomers include: 30% to 40% methyl methacrylate, 10% to 20% butyl acrylate, 15% to 25% styrene, and 25% to 35% ethyl acrylate.

[0018] Preferably, the mass of the monomer is 5 to 7.5 times the mass of the vinyl-cage polysilsesquioxane, more preferably 5.5 to 6.5 times, and even more preferably 6 times.

[0019] Preferably, the initiator is benzoyl peroxide (BPO).

[0020] Preferably, the mass of the initiator is 2.5% to 3.5% of the mass of the monomer.

[0021] Preferably, the organic solvent is at least one of toluene, xylene, dimethylformamide (DMF), and dimethyl sulfoxide (DMSO).

[0022] Preferably, the organic solvent is 45% to 65% of the mass of the vinyl-cage polysilsesquioxane.

[0023] Preferably, the mixing reaction temperature is 70~90℃, the mixing reaction time is 2~4h, and the stirring speed is 1000~1500r / min.

[0024] Preferably, the process of mixing and reacting vinyl-cage-type polysilsesquioxane, monomer, initiator, and organic solvent includes: Vinyl-cage polysilsesquioxane was dispersed in a portion of an organic solvent to prepare a vinyl-cage polysilsesquioxane dispersion. The monomer and a portion of the initiator were mixed to prepare a monomer-initiator mixture. The remaining initiator was dispersed in the remaining organic solvent to prepare an initiator dispersion. The vinyl-cage-type polysilsesquioxane dispersion and the monomer-initiator mixture were mixed to obtain an intermediate product; The initiator dispersion and intermediate product were mixed and reacted under heat to obtain a vinyl-cage-type polysilsesquioxane modified waterborne acrylic resin.

[0025] More preferably, the initiator accounts for 96% to 99% of the total mass of the initiator.

[0026] More preferably, the organic solvent accounts for 85% to 90% of the total mass of the organic solvent.

[0027] More preferably, the process of mixing the vinyl-cage polysilsesquioxane dispersion and the monomer-initiator mixture includes: adding the monomer-initiator mixture dropwise to the vinyl-cage polysilsesquioxane dispersion at a temperature of 70~90°C, for a time of 1~1.5h, and at a stirring speed of 1000~1500r / min.

[0028] More preferably, the process of mixing the initiator dispersion and the intermediate product includes: adding the initiator dispersion dropwise to the intermediate product at a temperature of 70~90°C, for a time of 0.5~1h, and at a stirring speed of 1000~1500r / min.

[0029] More preferably, the temperature of the heat preservation reaction is 70~90℃, the heat preservation reaction time is 0.5~1.5h, and the stirring speed is 1000~1500r / min.

[0030] Preferably, the neutralization process includes: adjusting the pH of the vinyl-POSS modified waterborne acrylic resin to 7-8 with a neutralizing agent, keeping it at 70-90°C for 1-2 hours, and stirring at a speed of 1000-1500 r / min.

[0031] Preferably, the neutralizing agent is an amine neutralizing agent. This invention does not limit the specific type of amine neutralizing agent; those skilled in the art can select one according to the actual situation, such as at least one of N,N-dimethylethanolamine (DMEA), triethylamine, monoethanolamine, etc.

[0032] Preferably, the water emulsification process includes: dispersing at 70~90℃ for 1~2 hours after adding water, with a stirring speed of 1000~1500 r / min.

[0033] Preferably, during the water emulsification process, the amount of water used is 30% to 40% of the monomer mass.

[0034] In this embodiment, the rust-preventive filler is selected from at least one of zinc phosphate, aluminum tripolyphosphate, and zinc molybdate.

[0035] In this embodiment, the insulating filler is selected from at least one of mica powder, silicon dioxide, and alumina.

[0036] In this embodiment, the filler is selected from at least one of barite powder, talc powder, and calcium carbonate.

[0037] In this embodiment, the pigments and fillers are selected from at least one of titanium dioxide, carbon black, and iron oxide red.

[0038] In this embodiment, the thickening filler is selected from at least one of fumed silica, hydroxyethyl cellulose, and bentonite.

[0039] In this embodiment, the additives include, but are not limited to, at least one of wetting and dispersing agents, defoamers, leveling agents, and flash rust inhibitors.

[0040] This invention does not limit the specific type of wetting and dispersing agent, and those skilled in the art can select one according to the actual situation. For example, the wetting and dispersing agent can be selected from at least one of polycarboxylate, acrylate copolymer, polyether, etc.

[0041] Preferably, the amount of wetting and dispersing agent used is 0.3 to 0.8 parts by weight.

[0042] This invention does not limit the specific type of defoamer, and those skilled in the art can select one according to the actual situation. For example, the defoamer can be selected from at least one of organosilicon, polyether, etc.

[0043] Preferably, the amount of defoamer used is 0.2 to 0.5 parts by weight.

[0044] This invention does not limit the specific type of leveling agent, and those skilled in the art can select one according to the actual situation. For example, the leveling agent can be selected from at least one of acrylates, fluorocarbon modified acrylates, and organosilicones.

[0045] Preferably, the amount of leveling agent used is 0.3 to 0.7 parts by weight.

[0046] This invention does not limit the specific type of flash rust inhibitor, and those skilled in the art can select one according to the actual situation. For example, the flash rust inhibitor can be selected from at least one of organic acid salts, nitrites, etc.

[0047] Preferably, the amount of anti-flash rust agent is 0.2 to 0.5 parts by weight.

[0048] In this embodiment, the drying agent is selected from at least one of zinc isooctanoate, manganese isooctanoate, and cobalt isooctanoate.

[0049] Secondly, the present invention provides a method for preparing an anti-corrosion coating, comprising the following steps: mixing and dispersing a vinyl-cage-type polysilsesquioxane modified acrylic resin emulsion, rust-inhibiting filler, insulating filler, extender filler, pigment filler, thickening filler, additives, drier and water, and then grinding to a fineness ≤30μm to obtain an anti-corrosion coating.

[0050] In this embodiment, the mixture is dispersed by stirring. The stirring temperature is 25~40℃, the stirring time is 1.5~2.5h, and the stirring speed is 800~1200r / min.

[0051] In this embodiment, a sand mill or ball mill is used for grinding, and the grinding media is zirconia beads with a particle size of 0.8~1.2mm.

[0052] Thirdly, the present invention provides an anti-corrosion coating, which is formed by applying the anti-corrosion coating provided in the first aspect of the present invention to the surface of a substrate and curing it.

[0053] This invention uses vinyl-cage-type polysilsesquioxane modified acrylic resin, formed by modifying acrylate monomers with vinyl-cage-type polysilsesquioxane, as the core film-forming material. Its molecular structure is an end-group heterogeneous molecular structure. After adding multifunctional fillers to prepare a coating, the resin molecules in the coating are oriented and the coating is distributed in a crown shape. The root is a hydrophilic layer, which provides good adhesion to the substrate, and the crown is a hydrophobic layer, which protects the underlying structure while having a good hydrophobic effect, isolating water molecules from erosion and increasing the corrosion resistance of the coating.

[0054] In this embodiment, the substrate is surface-treated before coating.

[0055] Preferably, the substrate surface treatment steps include: treating the substrate with sandblasting or shot blasting to achieve a cleanliness level of Sa2.0 or higher, and controlling the roughness to 20~60μm, and completing the coating within 4 hours after treatment.

[0056] In this embodiment, the anti-corrosion coating is pretreated before application to ensure that it has a good and uniform viscosity, which facilitates subsequent construction steps.

[0057] Preferably, the pretreatment steps include: placing the anti-corrosion coating at a constant temperature of 5-30℃ for more than 24 hours, then stirring at a rate of 500-1000 r / min for 5-15 minutes, adding water to adjust the viscosity to 4000-6000 cp, letting it stand for 5-10 minutes to defoam, and finally filtering through an 80-120 mesh filter. The amount of water added is 0%-5% of the mass of the anti-corrosion coating.

[0058] In this embodiment, the coating method includes, but is not limited to, brushing, roller coating, or spraying.

[0059] In this embodiment, one or two coatings can be applied; the time interval between the two coatings is ≥4 hours.

[0060] In this embodiment, the curing process is carried out at a temperature of 10~35℃, a relative humidity of 35%~70%, and a curing time of 5~10 days.

[0061] In this embodiment, the thickness of the anti-corrosion coating (i.e., dry film) is 100~500μm.

[0062] Example 1 (1) 80 parts of vinyl-POSS were fully dissolved in 40 parts of toluene (PhMe), and ultrasonically dispersed to obtain a uniform vinyl-POSS dispersion; 480 parts of monomer mixture (35% methyl methacrylate (MMA), 15% butyl acrylate (BA), 20% styrene (ST), and 30% ethyl acrylate (EA)) and 14.4 parts of BPO were mixed, stirred evenly, and ultrasonically dissolved to obtain a monomer-initiator mixture; the monomer-initiator mixture was added dropwise to the vinyl-POSS dispersion at 1100 r / min, with a dropping temperature of 80°C and a dropping time of 1.2 h; after the dropping was completed, to ensure that the excess monomer reacted completely, 0.288 parts of BPO were dissolved in 5 parts of PhMe and dissolved at 1100 r / min. The resin was added dropwise to the reactor at a rotation speed of 100 r / min, at a temperature of 80°C, for 0.5 h. The mixture was then kept at 80°C for 1 h to obtain vinyl-POSS modified waterborne acrylic resin. 15 parts of N,N-dimethylethanolamine were added to neutralize the pH to 7-8, and the mixture was kept at 90°C for 1.5 h at a rotation speed of 1100 r / min. Then, 170 parts of deionized water were added, and the mixture was dispersed at 90°C for 1.5 h at a dispersion speed of 1500 r / min to obtain a vinyl-POSS modified acrylic resin emulsion.

[0063] (2) Weigh the raw materials according to the following proportions: 230 parts of vinyl-POSS modified acrylic resin emulsion, 15 parts of zinc phosphate, 10 parts of aluminum tripolyphosphate, 20 parts of mica powder, 10 parts of micron-sized silica, 10 parts of alumina, 70 parts of talc powder, 3 parts of carbon black, 1 part of nano-sized fumed silica, 3 parts of bentonite, 90 parts of deionized water, 0.4 parts of dispersant (BYK190), 0.3 parts of organosilicon defoamer (KS-530), 0.4 parts of leveling agent (BYK333), 0.3 parts of flash rust inhibitor (ADDSPEC-7150), 0.3 parts of zinc isooctanoate, and 0.1 parts of manganese isooctanoate. Add the above components to the reaction vessel, stir at 25°C for 1.5 h, stir at a speed of 1200 r / min, and grind with a sand mill until the fineness is ≤30 μm to obtain the anti-corrosion coating.

[0064] (3) The substrate of the pre-embedded channel is treated by sandblasting. The cleanliness reaches Sa2.0 level and the roughness is controlled at 50±2μm. The coating is completed within 4 hours after treatment. The coating is placed at a constant temperature of 20℃ for more than 24 hours, stirred at low speed for 10 minutes, and 3% of the anti-corrosion coating mass of deionized water is added to adjust the viscosity. After standing for 10 minutes to defoam, it is filtered with an 80-mesh filter. High-pressure air spraying is used for construction. The dry film thickness is controlled at 250±5μm. It is constructed in two layers with a time interval of 4 hours between the two layers. The spray gun model is W-71, the nozzle is 1.8mm, and the spraying air pressure is 4bar. Under the conditions of ambient temperature of 25℃ and relative humidity of 50%, it is cured for 7 days to allow the coating to be fully cured.

[0065] Example 2 Compared with Example 1, the only difference is that in step (1), the amount of vinyl-POSS used is 64 parts.

[0066] Example 3 Compared with Example 1, the only difference is that in step (1), the amount of vinyl-POSS used is 96 parts.

[0067] Example 4 Compared with Example 1, the only difference is that in step (1), BPO is added all at once, and the specific steps are as follows: (1) 80 parts of vinyl-POSS were fully dissolved in 40 parts of toluene (PhMe), and ultrasonically dispersed to obtain a uniform vinyl-POSS dispersion; 480 parts of a monomer mixture (35% methyl methacrylate (MMA), 15% butyl acrylate (BA), 20% styrene (ST), and 30% ethyl acrylate (EA)) and 14.688 parts of BPO were mixed, stirred evenly, and ultrasonically dissolved to obtain a monomer-initiator mixture; the monomer-initiator mixture was added dropwise to the vinyl-POSS dispersion at a speed of 1100 r / min, at a dropping temperature of 80 °C, and for 1.2 h; after the dropping was completed, 5 parts of PhMe were taken and dissolved at 1100 r / min. The solution was added dropwise to the reactor at a rotation speed of 100 r / min, with a dropping temperature of 80℃ and a dropping time of 0.5 h. The solution was then kept at 80℃ for 1 h to obtain vinyl-POSS modified waterborne acrylic resin. 20 parts of N,N-dimethylethanolamine were added to neutralize the solution to a pH of 7-8 (15 parts of neutralizing agent were insufficient to achieve this range, so the amount of neutralizing agent was increased). The solution was kept at 90℃ for 1.5 h at a rotation speed of 1100 r / min. Then, 170 parts of deionized water were added, and the solution was dispersed at 90℃ for 1.5 h at a dispersion speed of 1500 r / min to obtain a vinyl-POSS modified acrylic resin emulsion.

[0068] Comparative Example 1 Compared with Example 1, the only difference is that in step (1), the amount of vinyl-POSS used is 0 parts.

[0069] Comparative Example 2 Compared with Example 1, the only difference is that styrene ST was not added in step (1). The specific steps are as follows: (1) 80 parts of vinyl-POSS were fully dissolved in 40 parts of toluene (PhMe), and ultrasonically dispersed to obtain a uniform vinyl-POSS dispersion; 480 parts of monomer mixture (43.75% methyl methacrylate (MMA), 18.75% butyl acrylate (BA), and 37.5% ethyl acrylate (EA)) and 14.4 parts of BPO were mixed, stirred evenly, and ultrasonically dissolved to obtain a monomer-initiator mixture; the monomer-initiator mixture was added dropwise to the vinyl-POSS dispersion at 1100 r / min, with a dropping temperature of 80°C and a dropping time of 1.2 h; after the dropping was completed, to ensure that the excess monomer reacted completely, 0.288 parts of BPO were dissolved in 5 parts of PhMe and dissolved at 1100 r / min. The resin was added dropwise to the reactor at a rotation speed of 100 r / min, at a temperature of 80°C, for 0.5 h. The mixture was then kept at 80°C for 1 h to obtain vinyl-POSS modified waterborne acrylic resin. 15 parts of N,N-dimethylethanolamine were added to neutralize the pH to 7-8, and the mixture was kept at 90°C for 1.5 h at a rotation speed of 1100 r / min. Then, 170 parts of deionized water were added, and the mixture was dispersed at 90°C for 1.5 h at a dispersion speed of 1500 r / min to obtain a vinyl-POSS modified acrylic resin emulsion.

[0070] Performance testing 1. Drying time: GB / T 1728-2020 "Determination of drying time of paint film and putty film"; 2. Impact resistance: GB / T 20624.2-2006 "Rapid deformation (impact resistance) test for paints and varnishes - Part 2: Drop hammer test (small area punch)"; 3. Salt spray resistance: GB / T 31588.1-2015 "Determination of resistance to cyclic corrosion environments for paints and varnishes - Part 1: Wet (salt spray) / dry / moisture"; 4. Adhesion: GB / T 9286-2021 "Cross-cut test for paints and varnishes"; GB / T 5210-2006 "Pull-off adhesion test for paints and varnishes"; 5. Hardness: GB / T 6739-2022 "Determination of Hardness of Paints and Varnishes by Pencil Method"; 6. Flexibility: GB / T 6742-2007 "Bending Test of Paints and Varnishes"; 7. Abrasion resistance: GB / T 1768-2006 "Determination of abrasion resistance of paints and varnishes - Rotary rubber grinding wheel method"; 8. VOC: GB / T 23986.2-2023 "Determination of Volatile Organic Compounds (VOC) and / or Semi-Volatile Organic Compounds (SVOC) in Paints and Varnishes - Part 2: Gas Chromatography"; 9. Resistance to immersion in 3.5% NaCl: GB / T 9274-1988 "Determination of resistance to liquid media for paints and varnishes"; 10. Storage stability at 80℃: GB / T 6753.3-1986 "Test Method for Storage Stability of Coatings"; 11. Resistance to 150℃ heat aging: GB / T 1735-2009 "Determination of heat resistance of paints and varnishes".

[0071] Table 1

[0072] Please see Figures 1-2 ,pass Figures 1-2 It can be seen that the anti-corrosion coating prepared in Example 1 of the present invention has a better hydrophobic effect.

[0073] Please see Figure 3 ,pass Figure 3 It can be seen that the coating of Example 1 of the present invention only began to show rust spots after 2000 hours of neutral salt spray.

[0074] Please refer to Table 1. As can be seen from Table 1, the anti-corrosion coatings prepared in Examples 1-4 of this invention all exhibit excellent anti-corrosion properties (salt spray resistance ≥400h without red rust), good mechanical properties (adhesion (cross-cut test) ≤2, adhesion (pull-off test) ≥7MPa, hardness grade ≥H, flexibility ≤2mm, etc.), and environmental friendliness (VOC content ≤100g / L). Among these, a comparison between Comparative Example 1 and Examples 1-3 shows that the anti-corrosion coating prepared with a monomer mixture:vinyl-POSS ratio of 6:1 exhibits the best performance, indicating that a too-high or too-low mass ratio of monomer mixture to vinyl-POSS is detrimental to improving coating performance. Compared to Example 1, the surface drying time, hydrophobicity, anti-corrosion properties, adhesion, hardness, and flexibility of Example 4 are all reduced, indicating that the phased addition of the initiator is beneficial for a more thorough reaction, thereby improving the long-term corrosion resistance, impermeability, and mechanical properties of the coating. Compared with Example 1, the surface drying time, hydrophobicity, corrosion resistance, hardness and other properties of Comparative Example 2 were significantly reduced, indicating that the addition of ST is beneficial to significantly improve the long-term corrosion resistance, impermeability and mechanical properties of the coating.

[0075] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A corrosion protection coating, characterized in that, The raw materials include, in parts by mass, a vinyl-cage polysilsesquioxane modified acrylic resin emulsion 210-280 parts, a rust-proof filler 20-30 parts, an insulating filler 30-50 parts, a bulk filler 60-80 parts, a pigment filler 3-10 parts, a thickening filler 3-5 parts, deionized water 80-100 parts, an auxiliary 1-3 parts, and a quick-drying agent 0.3-0.5 parts.

2. The anticorrosive coating according to claim 1, characterized in that, The vinyl-cage polysilsesquioxane modified acrylic resin emulsion is prepared by the following steps: The vinyl-cage polysilsesquioxane, the monomer, the initiator and the organic solvent are mixed to react to obtain a vinyl-cage polysilsesquioxane modified water-based acrylic resin; The vinyl-cage polysilsesquioxane modified water-based acrylic resin is neutralized by a neutralizing agent and emulsified by water to obtain the vinyl-cage polysilsesquioxane modified acrylic resin emulsion; wherein, The monomer includes an acrylic ester monomer and styrene.

3. The anticorrosive coating according to claim 2, characterized in that, The acrylic ester monomer is at least one of isobornyl methacrylate, butyl acrylate, ethyl acrylate, diethylene glycol dimethacrylate, and methyl methacrylate; and / or, The monomer includes, in percentage by mass, 75%-85% of the acrylic ester monomer and 15%-25% of the styrene; and / or, The monomer includes, in percentage by mass, 30%-40% of the methyl methacrylate, 10%-20% of the butyl acrylate, 15%-25% of the styrene, and 25%-35% of the ethyl acrylate.

4. The anticorrosive coating according to claim 2, characterized in that, The mass of the monomer is 5-7.5 times the mass of the vinyl-cage polysilsesquioxane; and / or, The mass of the monomer is 5.5-6.5 times the mass of the vinyl-cage polysilsesquioxane; and / or, The mass of the monomer is 6 times the mass of the vinyl-cage polysilsesquioxane.

5. The anticorrosive coating according to claim 2, wherein The initiator is benzoyl peroxide; and / or, The mass of the initiator is 2.5%-3.5% of the mass of the monomer; and / or, The organic solvent is at least one of toluene, xylene, dimethylformamide, and dimethyl sulfoxide; and / or, The mass of the organic solvent is 45%-65% of the mass of the vinyl-cage polysilsesquioxane; and / or, The temperature of the mixing reaction is 70-90°C, the time of the mixing reaction is 2-4 hours, and the stirring speed is 1000-1500 r / min.

6. The anticorrosive coating according to claim 2, wherein The process of mixing the vinyl-cage polysilsesquioxane, the monomer, the initiator and the organic solvent includes: The vinyl-cage polysilsesquioxane is dispersed in part of the organic solvent to prepare a vinyl-cage polysilsesquioxane dispersion, the monomer and part of the initiator are mixed to prepare a monomer-initiator mixture, and the remaining initiator is dispersed in the remaining organic solvent to prepare an initiator dispersion; The vinyl-cage polysilsesquioxane dispersion and the monomer-initiator mixture are mixed to obtain an intermediate product; The initiator dispersion and the intermediate product are mixed and reacted under insulation to obtain the vinyl-cage polysilsesquioxane modified water-based acrylic resin; wherein, The partial initiator accounts for 96% to 99% of the total mass of the initiator; and / or, The partial organic solvent accounts for 85% to 90% of the total mass of the organic solvent; and / or, The process of mixing the vinyl-cage polysilsesquioxane dispersion liquid and the monomer-initiator mixture comprises: dropping the monomer-initiator mixture into the vinyl-cage polysilsesquioxane dispersion liquid, the dropping temperature is 70 to 90℃, the dropping time is 1 to 1.5h, and the stirring speed is 1000 to 1500r / min; and / or, The process of mixing the initiator dispersion liquid and the intermediate product comprises: dropping the initiator dispersion liquid into the intermediate product, the dropping temperature is 70 to 90℃, the dropping time is 0.5 to 1h, and the stirring speed is 1000 to 1500r / min; and / or, The temperature of the incubation reaction is 70 to 90℃, the time of the incubation reaction is 0.5 to 1.5h, and the stirring speed is 1000 to 1500r / min.

7. The anticorrosive coating according to claim 2, wherein The process of neutralization by the neutralizing agent comprises: adjusting the pH of the vinyl-cage polysilsesquioxane modified water-based acrylic resin to 7 to 8 by the neutralizing agent, and incubating at 70 to 90℃ for 1 to 2h, and the stirring speed is 1000 to 1500r / min; and / or, The neutralizing agent is an amine neutralizing agent; and / or, The process of water emulsification comprises: dispersing at 70 to 90℃ for 1 to 2h after adding water, and the stirring speed is 1000 to 1500r / min; and / or, In the process of water emulsification, the amount of water is 30% to 40% of the mass of the monomer.

8. The anticorrosive coating according to claim 1, wherein The rust-proof filler is selected from at least one of zinc phosphate, aluminum tripolyphosphate, and zinc molybdate; and / or, The insulating filler is selected from at least one of mica powder, silicon dioxide, and aluminum oxide; and / or, The body filler is selected from at least one of barite powder, talc powder, and calcium carbonate; and / or, The color filler is selected from at least one of titanium dioxide, carbon black, and iron red; and / or, The thickening filler is selected from at least one of fumed silica, hydroxyethyl cellulose, and bentonite; and / or, The auxiliary agent is selected from at least one of wetting dispersant, defoaming agent, leveling agent, and anti-flash rust agent; and / or, The catalyst drier is selected from at least one of zinc isooctoate, manganese isooctoate, and cobalt isooctoate.

9. A method for the production of a corrosion protection coating as claimed in any of claims 1 to 8, characterized in that The method comprises the following steps: Mixing and dispersing the vinyl-cage polysilsesquioxane modified acrylic resin emulsion, rust-proof filler, insulating filler, body filler, color filler, thickening filler, auxiliary agent, catalyst drier, and water, and then grinding to a fineness of ≤30μm to obtain the anticorrosive coating.

10. A corrosion protective coating, characterized in that, The anticorrosive coating is formed by coating the anticorrosive coating of any one of claims 1 to 8 to the surface of a substrate and curing.

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