Wear-resistant anticorrosive paint as well as preparation method and application thereof

Abstract

The invention relates to the technical field of coating materials, in particular to a wear-resistant anticorrosive coating as well as a preparation method and application thereof. The wear-resistant anticorrosive paint is prepared from the following raw materials: a composite silane modified hybrid polymer, a body filler, a functional filler, a silane coupling agent, a rheological additive and an auxiliary functional additive, wherein the composite silane modified hybrid polymer comprises a first silane modified hybrid polymer and a second silane modified hybrid polymer, the first silane modified hybrid polymer has a highly branched molecular structure, and the second silane modified hybrid polymer has elasticity. According to the wear-resistant anticorrosive paint, the first silane-modified hybrid polymer is used as matrix resin, and the second silane-modified hybrid polymer is used as an auxiliary material, so that the wear-resistant anticorrosive paint can form a compact and uniform protective coating with strong adhesive force through the synergistic effect of all the components; the protective coating can effectively resist corrosion of the external environment, so that the wear resistance and corrosion resistance of the protective coating are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of coating materials technology, and in particular to a wear-resistant and corrosion-resistant coating, its preparation method and application. Background Technology

[0002] Currently, railway freight cars are generally made of carbon steel, with an anti-corrosion coating applied to achieve corrosion protection. This coating typically provides 8 to 10 years of protection. However, railway freight cars are used frequently and operate under harsh conditions. During loading and unloading, the anti-corrosion coating is subjected to wear, impact, and collisions. Furthermore, some goods are inherently corrosive. These factors cause the anti-corrosion coating on the inner walls of railway freight cars to peel off in large areas after only 3 to 5 years of use, leading to premature corrosion and failing to meet the required 8-10 year protection period. Additionally, during the transport of powdery goods such as coal and ore powder, freezing issues can occur due to humid and low-temperature transport conditions. This causes the powder particles to adhere to the inner walls of the freight car, affecting the subsequent unloading process and resulting in the loss of some of the powdery goods.

[0003] At present, new coating technologies using polyurea elastomers and polyurethane elastomers as raw materials can be used to solve the corrosion problem of anti-corrosion coatings and achieve long-term protection of railway freight cars. However, the coatings formed by these materials are difficult to adhere effectively to the surface of railway freight cars, thus affecting the wear resistance of the anti-corrosion coatings. Summary of the Invention

[0004] This application provides a wear-resistant and anti-corrosion coating, its preparation method, and its application to solve the following technical problem: how to improve the wear resistance of anti-corrosion coatings. In a first aspect, this application provides a wear-resistant and anti-corrosion coating, wherein, by weight, the raw materials of the wear-resistant and anti-corrosion coating satisfy the following: The composite silane-modified hybrid polymer comprises 30 to 50 parts, extender filler 10 to 30 parts, functional filler 3 to 5 parts, silane coupling agent 1 to 2 parts, rheology modifier 0.5 to 2 parts, and auxiliary functional additives; wherein the composite silane-modified hybrid polymer includes a first silane-modified hybrid polymer and a second silane-modified hybrid polymer, the first silane-modified hybrid polymer having a highly branched molecular structure, and the second silane-modified hybrid polymer having greater elasticity than the first silane-modified hybrid polymer.

[0005] Optionally, the first silane-modified hybrid polymer is present in 25 to 35 parts by weight, and the second silane-modified hybrid polymer is present in 5 to 15 parts by weight; and / or The viscosities of the first silane-modified hybrid polymer and the second silane-modified hybrid polymer are 0.5 Pa·S to 1.2 Pa·S, respectively.

[0006] Optionally, the filler material may include silica fume and / or barium sulfate; and / or The types of functional fillers include glass powder and / or ceramic powder; and / or The rheology modifiers include hydrogenated castor oil-modified polyamide waxes and / or fumed silica.

[0007] Optionally, the auxiliary functional agent, by weight, includes: Benztriazole polymer: 1 to 3 parts, dispersant: 0.5 to 2 parts, pigment: 3 to 20 parts, anti-rust pigment: 6 to 15 parts, dibutyltin dilaurate: 0 to 0.5 parts, silicon-based polymer: 0 to 0.5 parts, and alkyl glycidyl ether: 10 to 20 parts.

[0008] Optionally, the anti-aging additive includes benzotriazole polymers; and / or The dispersant includes polycarboxylic acid ester type dispersants and / or modified polyurethane type dispersants; and / or The types of pigments include titanium dioxide and / or carbon black; and / or The types of rust-preventive pigments include aluminum tripolyphosphate and / or zinc phosphate.

[0009] Secondly, this application provides a method for preparing the wear-resistant and anti-corrosion coating described in the first aspect, the method comprising: The first silane-modified hybrid polymer, the second silane-modified hybrid polymer, and the dispersant are subjected to a first stirring to obtain a first mixture; The rheology modifier and the first mixture are stirred a second time to obtain a second mixture; The pigment, anti-rust pigment, functional filler, extender filler, and the second mixture are subjected to a third stirring to obtain a third mixture; The silane coupling agent, dibutyltin dilaurate, benzotriazole polymer, silicon-based polymer, alkyl glycidyl ether, and the third mixture are stirred in a fourth step to obtain a wear-resistant and anti-corrosion coating.

[0010] Optionally, the first stirring speed is 1000 r / min to 1200 r / min, and the first stirring time is 3 min to 5 min; and / or The second stirring speed is 1000 r / min to 1200 r / min, and the second stirring time is 10 min to 15 min; and / or The third stirring speed is 1000 r / min to 1200 r / min, and the third stirring time is 60 min to 90 min; and / or The fourth stirring speed is 1000 r / min to 1200 r / min, and the fourth stirring time is 10 min to 15 min.

[0011] Thirdly, this application provides a method for preparing a wear-resistant and corrosion-resistant coating, wherein the preparation method includes: The surface of the steel substrate is pretreated to obtain a pretreated steel substrate; A water-based primer is sprayed onto the surface of the pretreated steel substrate to obtain a primer layer; The primer layer is subjected to impurity removal treatment to obtain a pretreated primer layer; The wear-resistant and corrosion-resistant coating described in the first aspect is sprayed onto the surface of the pretreated primer layer to obtain a rough surface coating. The rough surface coating is dried to obtain a wear-resistant and corrosion-resistant coating.

[0012] Fourthly, this application provides a wear-resistant and corrosion-resistant coating, which is prepared by the preparation method described in the third aspect.

[0013] Optionally, the wear-resistant and corrosion-resistant coating includes a primer layer and a surface coating, wherein the thickness of the primer layer is 10 μm to 20 μm, and the thickness of the surface coating is ≥200 μm.

[0014] The technical solutions provided in this application have the following advantages compared with the prior art: This application provides a wear-resistant and anti-corrosion coating. The coating uses a first silane-modified hybrid polymer as the main resin, supplemented with a second silane-modified hybrid polymer. Based on the highly branched molecular structure of the first silane-modified hybrid polymer and the high elasticity of the second silane-modified hybrid polymer, the composite silane-modified hybrid polymer can form a dense protective film on the surface of the coating. This dense protective film effectively blocks the penetration of moisture, air, and corrosive media, thus improving the corrosion resistance of the coating. Furthermore, the composite silane-modified hybrid polymer itself has the advantages of high crosslinking density and tight molecular distribution, which improves the toughness of the protective film formed by the composite silane-modified hybrid polymer, thereby improving the wear resistance of the coating. Additionally, the addition of extender and functional fillers can effectively improve the formation of the composite silane-modified hybrid polymer. The surface hardness and dispersion of the protective film are improved to increase the thickness and volume of the wear-resistant and anti-corrosion coating, thereby further improving the wear resistance of the coating. Additionally, the addition of silane coupling agents increases the adhesion between the protective film formed by the composite silane-modified hybrid polymer and the substrate, improving the adhesion of the protective film to the substrate surface. This makes the coating difficult to remove from the substrate surface, thus improving the wear resistance of the coating. Furthermore, the addition of rheology modifiers can improve the wear resistance of the wear-resistant and anti-corrosion coating. The flowability of the first and second silane-modified hybrid polymers allows for thorough mixing, enhancing the density of the protective film formed on the surface of the coating. This further improves the wear resistance and corrosion resistance of the coating. Therefore, the synergistic effect between the components of this wear-resistant and anti-corrosion coating enables it to form a dense, uniform, and strongly adherent protective coating. This protective coating effectively resists environmental erosion, significantly improving its wear resistance and corrosion resistance. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic flowchart of a method for preparing wear-resistant and anti-corrosion coatings provided in an embodiment of this application; Figure 2 This is a schematic diagram of a method for preparing a wear-resistant and corrosion-resistant coating according to an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The range descriptions used in this application, such as numerical ranges and proportional ranges, include all possible sub-ranges and single numerical values ​​within that range. For example, the range description of "1 to 6" or "1 to 6" covers all sub-ranges (such as 1 to 3, 2 to 5, etc.) and single numbers (such as 1, 2, 3, 4, 5, 6) between 1 and 6. Unless otherwise specified, the terms "comprising" and others used herein mean "including but not limited to"; relational terms such as "first" and "second" are used only to distinguish different entities or operations and do not imply an actual order or relationship; "and / or" indicates that multiple situations can exist individually or simultaneously; expressions such as "at least one," "multiple," and "at least one" refer to any combination of the corresponding objects, including combinations of single or multiple objects. The proportional relationships involved in this document, such as mass ratios and molar ratios, should be understood as the correspondence between the first and second terms of a proportional formula, according to the order of description. The raw materials, reagents, instruments, and equipment used herein can all be obtained by purchasing from the market or by existing methods.

[0020] Besides the technical problems existing in the background technology, novel coating technologies using polyurea elastomers and polyurethane elastomers as raw materials also suffer from high material costs, inconvenient construction, and incompatibility with existing coating processes, making them difficult to adapt to the actual needs of current truck bodies. Specific reasons are as follows: Polyurea and polyurethane elastomers have high unit prices and require specialized spraying methods. Furthermore, the required spraying thickness is at least 500μm, which undoubtedly increases material consumption and thus raises usage costs. Additionally, these materials require specialized polyurea spraying equipment, which is inconvenient to operate and expensive. Moreover, the coating requires a one-time spraying process, making subsequent recoating and repair difficult, further complicating on-site construction. Furthermore, this coating technology requires surface treatment using a comprehensive blasting cleaning method before coating, but this method is incompatible with existing steel shot blasting pretreatment processes, necessitating production line modifications to ensure the smooth operation of these novel coating technologies.

[0021] Therefore, in addition to improving the wear resistance of anti-corrosion coatings, it is also necessary to reduce the overall material cost and the difficulty of coating operations.

[0022] This application provides a wear-resistant and anti-corrosion coating, wherein the raw materials of the wear-resistant and anti-corrosion coating, by weight, satisfy the following: The composite silane-modified hybrid polymer comprises 30 to 50 parts, extender filler 10 to 30 parts, functional filler 3 to 5 parts, silane coupling agent 1 to 2 parts, rheology modifier 0.5 to 2 parts, and auxiliary functional additives; wherein the composite silane-modified hybrid polymer includes a first silane-modified hybrid polymer and a second silane-modified hybrid polymer, the first silane-modified hybrid polymer having a highly branched molecular structure, and the second silane-modified hybrid polymer having greater elasticity than the first silane-modified hybrid polymer.

[0023] It should be noted that the weight percentage of the composite silane-modified hybrid polymer can be 30 to 50 parts, ensuring that the wear-resistant and anti-corrosion coating has a sufficient amount of composite silane-modified hybrid polymer. The sufficient amount of composite silane-modified hybrid polymer can form a dense and highly tough protective film on the surface of the coating. This dense protective film can effectively block the penetration of moisture, air and corrosive media to improve its corrosion resistance, while the highly tough protective film can improve the wear resistance of the coating formed by the wear-resistant and anti-corrosion coating.

[0024] The weight percentage of the composite silane-modified hybrid polymer can be 30, 35, 40, 45, or 50 parts.

[0025] It should be noted that the weight percentage of extender filler can be 10 to 30 parts and the weight percentage of functional filler can be 3 to 5 parts, ensuring that the wear-resistant and anti-corrosion coating has sufficient extender filler and functional filler. Sufficient extender filler and functional filler can effectively improve the surface hardness and dispersion of the protective film formed by the composite silane-modified hybrid polymer, thereby increasing the thickness and volume of the coating formed by the wear-resistant and anti-corrosion coating, and further improving the wear resistance of the coating formed by the wear-resistant and anti-corrosion coating.

[0026] The weight percentage of the filler material can be 10, 15, 20, 25, or 30 parts.

[0027] The weight percentage of this functional filler can be 3, 4, or 5 parts.

[0028] It should be noted that the weight of the silane coupling agent can be 1 to 2 parts, ensuring that the wear-resistant and anti-corrosion coating has a sufficient amount of silane coupling agent. The sufficient amount of silane coupling agent can increase the adhesion between the protective film formed by the composite silane modified hybrid polymer and the substrate, thereby improving the adhesion of the protective film on the substrate surface and thus improving the wear resistance of the coating formed by the wear-resistant and anti-corrosion coating.

[0029] The weight parts of the silane coupling agent can be 1.0 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2.0 parts.

[0030] It should be noted that the silane coupling agent can be silane coupling agent KH560.

[0031] It should be noted that the rheology modifier can be 0.5 to 2 parts by weight, ensuring that the wear-resistant and anti-corrosion coating has a sufficient amount of rheology modifier. A sufficient amount of rheology modifier can improve the flowability of the wear-resistant and anti-corrosion coating, so that the first silane-modified hybrid polymer and the second silane-modified hybrid polymer can be fully mixed, thereby further improving the wear resistance and corrosion resistance of the coating formed by the wear-resistant and anti-corrosion coating.

[0032] The rheology modifier can be present in weight parts of 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.0 parts.

[0033] It should be noted that the first silane-modified hybrid polymer and the second silane-modified hybrid polymer are a class of highly branched polymer resins with 100% solids content. The atoms in their molecular structures are closely packed, giving them some unique properties: (1) Low viscosity. Compared with linear macromolecules of similar molecular weight, the viscosity of the first silane-modified hybrid polymer and the second silane-modified hybrid polymer at the same concentration is much lower, which makes them both have excellent wettability and permeability. Therefore, it is very suitable for preparing high solids content and solvent-free coatings.

[0034] (2) Numerous end-group functional groups. The molecular structures of the first silane-modified hybrid polymer and the second silane-modified hybrid polymer contain a large number of polar groups, which contributes to the excellent adhesion of the wear-resistant and corrosion-resistant coating.

[0035] (3) It does not contain volatile solvents. The wear-resistant and anti-corrosion coating formed by the first silane-modified hybrid polymer and the second silane-modified hybrid polymer has a solid content (excluding volatile matter) of more than 95% during the actual coating process. The weight content of the volatile organic compounds (VOC) of the wear-resistant and anti-corrosion coating is calculated to be less than 60 g / L. This meets the requirements of the new technical requirements for low volatile organic compound content coating products GB / T38597-2020 for solvent-free coatings. This shows that the wear-resistant and anti-corrosion coating meets the requirements of solvent-free coatings and belongs to environmentally friendly coatings.

[0036] It should be noted that the first silane-modified hybrid polymer can be silane-modified hybrid polymer HP 211 (Guangzhou Hechun Electronics Technology Co., Ltd.), and the second silane-modified hybrid polymer can be silane-modified hybrid polymer HP201 (Guangzhou Hechun Electronics Technology Co., Ltd.).

[0037] In summary, the wear-resistant and anti-corrosion coating provided in this application, through the synergistic effect of its components, can form a dense, uniform, and strongly adhesive protective coating. This protective coating not only effectively resists erosion from the external environment but also possesses excellent wear resistance and corrosion resistance. Specifically: (1) Dense protective film: Based on the highly branched molecular structure and high cross-linking density of the first silane-modified hybrid polymer and the second silane-modified hybrid polymer, the wear-resistant and anti-corrosion coating can form a dense protective film, which can effectively block the penetration of moisture, air and corrosive media.

[0038] (2) Uniform coating: The addition of rheology modifiers ensures the uniformity and smoothness of the coating, avoiding defects in the construction process.

[0039] (3) Strong adhesion: The use of silane coupling agent enhances the adhesion between the coating and the substrate, making the coating less likely to fall off or peel off.

[0040] (4) High wear resistance: The addition of extender filler and functional filler increases the surface hardness and wear resistance of the coating, enabling it to maintain good performance when subjected to external impact.

[0041] Therefore, the synergistic effect between the various components of this wear-resistant and anti-corrosion coating enables it to form a highly efficient and durable protective coating, which significantly improves the coating's wear resistance and corrosion resistance. This makes this wear-resistant and anti-corrosion coating a promising candidate for applications in construction, industry, transportation, and other fields, providing long-term protection for various substrates.

[0042] In some optional embodiments, the first silane-modified hybrid polymer is present in parts by weight of 25 to 35, and the second silane-modified hybrid polymer is present in parts by weight of 5 to 15; and / or The viscosities of the first silane-modified hybrid polymer and the second silane-modified hybrid polymer are 0.5 Pa·s to 1.2 Pa·s, respectively. In these embodiments, the weight percentage of the first silane-modified hybrid polymer can be 25 to 35 parts, and the weight percentage of the second silane-modified hybrid polymer can be 5 to 15 parts, ensuring that the wear-resistant and anti-corrosion coating has sufficient amounts of both the first and second silane-modified hybrid polymers. These two polymers can form a dense and highly tough protective film on the surface of the coating formed by the wear-resistant and anti-corrosion coating. This dense protective film can effectively block the penetration of moisture, air, and corrosive media to improve its corrosion resistance, while the highly tough protective film can improve the wear resistance of the coating formed by the wear-resistant and anti-corrosion coating. In addition, the viscosity of the first and second silane-modified hybrid polymers can be 0.5 Pa·s to 1.2 Pa·s, respectively, resulting in lower viscosity. The lower viscosity of the first and second silane-modified hybrid polymers allows for thorough mixing, thereby forming a dense and highly tough protective film on the surface of the coating formed by the wear-resistant and anti-corrosion coating.

[0043] The weight parts of the first silane-modified hybrid polymer can be 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, or 35.

[0044] The weight parts of the second silane-modified hybrid polymer can be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15 parts.

[0045] The viscosities of the first silane-modified hybrid polymer and the second silane-modified hybrid polymer can be 0.5 Pa·s, 0.6 Pa·s, 0.7 Pa·s, 0.8 Pa·s, 0.9 Pa·s, 1.0 Pa·s, 1.1 Pa·s, or 1.2 Pa·s, respectively.

[0046] In some alternative embodiments, the filler material includes silica powder and / or barium sulfate; and / or The types of functional fillers include glass powder and / or ceramic powder; and / or The rheology modifiers include hydrogenated castor oil-modified polyamide waxes and / or fumed silica; In these embodiments, the extender filler may include silica powder and / or barium sulfate, and the functional filler may include glass powder and / or ceramic powder. These extender fillers and functional fillers can effectively improve the surface hardness and dispersion of the protective film formed by the composite silane-modified hybrid polymer, thereby increasing the thickness and volume of the coating formed by the wear-resistant and anti-corrosion coating, and further improving the wear resistance of the coating formed by the wear-resistant and anti-corrosion coating. The rheology modifier may include hydrogenated castor oil-modified polyamide wax and / or fumed silica, which can effectively improve the flowability of the wear-resistant and anti-corrosion coating, so that the first silane-modified hybrid polymer and the second silane-modified hybrid polymer are fully mixed, thereby further improving the wear resistance and corrosion resistance of the coating formed by the wear-resistant and anti-corrosion coating.

[0047] It should be noted that this hydrogenated castor oil modified polyamide wax has low viscosity and high anti-sagging properties, so it can be adjusted at any time during the coating process to reduce the difficulty of coating. In addition, the anti-sagging properties of ordinary polyamide wax will significantly decrease at baking temperatures of 60°C to 80°C, but the anti-sagging properties of this hydrogenated castor oil modified polyamide wax will not decrease at baking temperatures of 90°C.

[0048] It should be noted that the silane coupling agent can be a KH560 type silane coupling agent.

[0049] In some alternative embodiments, the auxiliary functional agent comprises, by weight, the following: Benztriazole polymer: 1 to 3 parts, dispersant: 0.5 to 2 parts, pigment: 3 to 20 parts, anti-rust pigment: 6 to 15 parts, dibutyltin dilaurate: 0 to 0.5 parts, silicon-based polymer: 0 to 0.5 parts, and alkyl glycidyl ether: 10 to 20 parts; In these embodiments, the benzotriazole polymer can be 1 to 3 parts by weight, ensuring that the wear-resistant and anti-corrosion coating contains a sufficient amount of benzotriazole polymer. A sufficient amount of benzotriazole polymer can effectively delay the aging process of the coating, allowing it to maintain good performance even after prolonged use, thereby further improving its wear resistance and corrosion resistance. Additionally, the dispersant can be 0.5 to 2 parts by weight, ensuring that the wear-resistant and anti-corrosion coating contains a sufficient amount of dispersant. A sufficient amount of dispersant can effectively disperse the various components, promoting rapid coating formation and the creation of a dense and highly resilient protective film. Furthermore, the pigment... The amount of pigment can range from 3 to 20 parts, ensuring sufficient pigment in the wear-resistant and anti-corrosion coating. Sufficient pigment can adjust the color of the coating to enhance its appearance. Additionally, the weight percentage of rust-preventive pigment can range from 6 to 15 parts, ensuring sufficient rust-preventive pigment in the coating. This sufficient amount of rust-preventive pigment will form a passivation film on the surface of the coating. This passivation film can prevent the coating from contacting corrosive media, thus providing rust prevention. Furthermore, sufficient rust-preventive pigment can effectively absorb and neutralize harmful ions from corrosive media, further improving the corrosion resistance of the coating. The weight percentage of dibutyltin dilaurate can be 0. The amount of dibutyltin dilaurate, ranging from 0 to 0.5 parts, ensures that the wear-resistant and anti-corrosion coating contains sufficient amounts of dibutyltin dilaurate. Sufficient dibutyltin dilaurate accelerates the drying process of the coating, allowing it to reach its final performance state more quickly. Therefore, this catalyst not only improves the application efficiency of the coating but also helps reduce mechanical damage to the coating during incomplete curing, thereby improving its wear resistance. Additionally, the weight percentage of the silicon-based polymer can be 0 to 0.5 parts, ensuring that the wear-resistant and anti-corrosion coating contains sufficient amounts of silicon-based polymers. Sufficient silicon-based polymers can reduce the probability of air bubbles during the preparation of the anti-corrosion coating. Improving the uniformity of dispersion of each component in the anti-corrosion coating enhances its wear resistance and corrosion resistance. Furthermore, the weight percentage of alkyl glycidyl ether can be 10 to 20 parts, ensuring sufficient alkyl glycidyl ether in the coating. Sufficient alkyl glycidyl ether reduces the viscosity of the coating, improving its application properties. Additionally, sufficient alkyl glycidyl ether participates in the curing reaction, forming a stable cross-linked structure. This stable cross-linked structure enhances the mechanical properties of the coating, thereby improving its wear resistance and corrosion resistance.

[0050] The benzotriazole polymer can be present in parts by weight of 1.0, 1.5, 2.0, 2.5, or 3.0.

[0051] The dispersant can be present in parts by weight of 0.5, 1.0, 1.5 or 2.

[0052] The pigment can be in parts by weight of 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20.

[0053] The weight percentage of the rust-preventive pigment can be 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 parts.

[0054] The weight parts of the dibutyltin dilaurate can be 0, 0.1, 0.2, 0.3, 0.4, or 0.5 parts.

[0055] The weight percentage of the silicon-based polymer can be 0, 0.1, 0.2, 0.3, 0.4, or 0.5 parts.

[0056] The alkyl glycidyl ether can be present in parts by weight of 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20.

[0057] It should be noted that the benzotriazole polymer can be either a UV absorber or an antioxidant. This benzotriazole polymer can be either Chiguard 5530 or Chiguard 353.

[0058] It should be noted that the dibutyltin dilaurate can be 10% by mass; the silicon-based polymer can be a polymethylsiloxane polymer, such as BKY 085; and the alkyl glycidyl ether can be a C12 to C14 alkyl glycidyl ether (AGE).

[0059] In some optional embodiments, the dispersant comprises a polycarboxylic acid ester type dispersant and / or a modified polyurethane type dispersant; and / or The types of pigments include titanium dioxide and / or carbon black; and / or The types of rust-preventive pigments include aluminum tripolyphosphate and / or zinc phosphate.

[0060] In these embodiments, the dispersant may include polycarboxylic acid ester type dispersant and / or modified polyurethane type dispersant, and the pigment may include titanium dioxide and / or carbon black, and the anti-rust pigment may include aluminum tripolyphosphate and / or zinc phosphate. These auxiliary additives can effectively improve the wear resistance and corrosion resistance of wear-resistant and anti-corrosion coatings.

[0061] It should be noted that, in the case of a modified polyurethane dispersant, the modified polyurethane dispersant can be EFKA 4010.

[0062] Figure 1 An exemplary schematic diagram of a method for preparing a wear-resistant and anti-corrosion coating according to an embodiment of this application is shown; Based on a general inventive concept, such as Figure 1 As shown in the embodiment of this application, a method for preparing the wear-resistant and anti-corrosion coating is provided, the method comprising: S1. The first silane-modified hybrid polymer, the second silane-modified hybrid polymer, and the dispersant are subjected to a first stirring to obtain a first mixture; S2. The rheology modifier and the first mixture are stirred for a second time to obtain a second mixture; S3. The pigment, anti-rust pigment, functional filler, extender filler and the second mixture are stirred for a third time to obtain a third mixture; S4. The silane coupling agent, dibutyltin dilaurate, benzotriazole polymer, silicon-based polymer, alkyl glycidyl ether and the third mixture are stirred in a fourth step to obtain a wear-resistant and anti-corrosion coating.

[0063] This method is for preparing the above-mentioned wear-resistant and anti-corrosion coating. The specific composition of the wear-resistant and anti-corrosion coating can be referred to the above embodiments. Since this method adopts some or all of the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0064] It should be noted that, apart from the specific stirring process, this method operates at a rotation speed of 300 r / min to 500 r / min throughout.

[0065] In some optional embodiments, the first stirring speed is 1000 r / min to 1200 r / min, and the first stirring time is 3 min to 5 min; and / or The second stirring speed is 1000 r / min to 1200 r / min, and the second stirring time is 10 min to 15 min; and / or The third stirring speed is 1000 r / min to 1200 r / min, and the third stirring time is 60 min to 90 min; and / or The speed of the fourth stirring is 1000 r / min to 1200 r / min, and the stirring time is 10 min to 15 min; In these embodiments, the first stirring speed can be from 1000 r / min to 1200 r / min, and the first stirring time can be from 3 min to 5 min. The first stirring promotes thorough mixing of the first silane-modified hybrid polymer, the second silane-modified hybrid polymer, and the dispersant, facilitating subsequent reactions and resulting in a coating with high wear resistance and corrosion resistance. The second stirring speed can also be from 1000 r / min to 1200 r / min, and the second stirring time can be from 10 min to 15 min. The second stirring promotes thorough mixing of the rheology modifier and the first mixture, facilitating the final formation of a coating with high wear resistance and corrosion resistance. The third stirring speed... The stirring speed can be from 1000 r / min to 1200 r / min, and the third stirring time can be from 60 min to 90 min. The third stirring method promotes the thorough mixing of pigments, anti-rust pigments, functional fillers, extender fillers, and the second mixture, so as to obtain a coating with high wear resistance and corrosion resistance. In addition, the fourth stirring speed can be from 1000 r / min to 1200 r / min, and the fourth stirring time can be from 10 min to 15 min. The fourth stirring method promotes the thorough mixing of silane coupling agent, dibutyltin dilaurate, benzotriazole polymer, silicon polymer, alkyl glycidyl ether, and the third mixture, so as to obtain a coating with high wear resistance and corrosion resistance.

[0066] The rotational speed of the first stirring can be 1000 r / min, 1010 r / min, 1020 r / min, 1030 r / min, 1040 r / min, 1050 r / min, 1060 r / min, 1070 r / min, 1080 r / min, 1090 r / min, 1100 r / min, 1110 r / min, 1110 r / min, 1120 r / min, 1130 r / min, 1140 r / min, 1150 r / min, 1160 r / min, 1170 r / min, 1180 r / min, 1190 r / min or 1200 r / min.

[0067] The first stirring time can be 3 minutes, 4 minutes, or 5 minutes.

[0068] The rotational speed of the second stirrer can be 1000 r / min, 1010 r / min, 1020 r / min, 1030 r / min, 1040 r / min, 1050 r / min, 1060 r / min, 1070 r / min, 1080 r / min, 1090 r / min, 1100 r / min, 1110 r / min, 1110 r / min, 1120 r / min, 1130 r / min, 1140 r / min, 1150 r / min, 1160 r / min, 1170 r / min, 1180 r / min, 1190 r / min or 1200 r / min.

[0069] The second stirring time can be 10 min, 11 min, 12 min, 13 min, 14 min, or 15 min.

[0070] The rotational speed of the third stirrer can be 1000 r / min, 1010 r / min, 1020 r / min, 1030 r / min, 1040 r / min, 1050 r / min, 1060 r / min, 1070 r / min, 1080 r / min, 1090 r / min, 1100 r / min, 1110 r / min, 1110 r / min, 1120 r / min, 1130 r / min, 1140 r / min, 1150 r / min, 1160 r / min, 1170 r / min, 1180 r / min, 1190 r / min or 1200 r / min.

[0071] The third stirring time can be 60 min, 65 min, 70 min, 75 min, 80 min, 85 min, or 90 min.

[0072] The speed of the fourth stirrer can be 1000 r / min, 1010 r / min, 1020 r / min, 1030 r / min, 1040 r / min, 1050 r / min, 1060 r / min, 1070 r / min, 1080 r / min, 1090 r / min, 1100 r / min, 1110 r / min, 1110 r / min, 1120 r / min, 1130 r / min, 1140 r / min, 1150 r / min, 1160 r / min, 1170 r / min, 1180 r / min, 1190 r / min or 1200 r / min.

[0073] The fourth stirring time can be 10 min, 11 min, 12 min, 13 min, 14 min, or 15 min.

[0074] Figure 2 An exemplary schematic diagram of a method for preparing a wear-resistant and corrosion-resistant coating according to an embodiment of this application is shown; Based on a general inventive concept, such as Figure 2 As shown in the embodiment of this application, a method for preparing a wear-resistant and corrosion-resistant coating is provided. The preparation method is as follows: S1. The surface of the steel substrate is pretreated to obtain a pretreated steel substrate; S2. Spray water-based primer onto the surface of the pretreated steel substrate to obtain a primer layer; S3. The primer layer is subjected to impurity removal treatment to obtain a pretreated primer layer; S4. Spray the wear-resistant and anti-corrosion coating onto the surface of the pretreated primer layer to obtain a rough surface coating; S5. Dry the rough surface coating to obtain a wear-resistant and corrosion-resistant coating.

[0075] This method is for preparing the above-mentioned wear-resistant and anti-corrosion coating. The specific composition of the wear-resistant and anti-corrosion coating can be referred to the above embodiments. Since this method adopts some or all of the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0076] It should be noted that this pretreatment can use existing steel shot blasting pretreatment processes, and the steel substrate after pretreatment can achieve the Sa2 standard specified in GB / T8923.1. 1 / 2 Grade 1 standard, which means the surface roughness of the steel substrate is in the range of 50μm to 100μm.

[0077] It should be noted that the primer can be a solderable water-based shop primer.

[0078] It should be noted that this impurity removal treatment can be a combination of dust removal and oil removal, or it can be a whole-process spray cleaning process.

[0079] It should be noted that this spraying can be performed using high-pressure airless spraying.

[0080] It should be noted that the drying process can be either oven drying at 50℃ to 70℃ or natural air drying.

[0081] Based on a general inventive concept, this application provides a wear-resistant and corrosion-resistant coating prepared by the aforementioned preparation method. This wear-resistant and corrosion-resistant coating is achieved based on the above-described preparation method, the specific steps of which can be referred to in the above embodiments. Since this wear-resistant and corrosion-resistant coating adopts some or all of the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0082] In some optional embodiments, the wear-resistant and corrosion-resistant coating includes a primer layer and a surface coating, wherein the thickness of the primer layer is 10 μm to 20 μm and the thickness of the surface coating is ≥200 μm; In these embodiments, a primer layer with a thickness of 10 μm to 20 μm and a surface coating with a thickness of ≥200 μm can promote a wear-resistant and corrosion-resistant coating with sufficient thickness, which can effectively improve its wear resistance and corrosion resistance.

[0083] The present application is further illustrated below with reference to specific embodiments. Experimental methods in the following embodiments that do not specify specific conditions are generally determined according to national / industry standards; if there is no corresponding national / industry standard, they are performed according to general international standards, conventional conditions, or conditions recommended by the manufacturer.

[0084] Example 1 A wear-resistant and anti-corrosion coating, wherein 1000g of the raw materials of the wear-resistant and anti-corrosion coating satisfy the following conditions: First silane-modified hybrid polymer: 25 parts, second silane-modified hybrid polymer: 15 parts, extender filler: 20 parts, functional filler: 5 parts, silane coupling agent KH560: 1 part, rheology modifier: 1 part, benzotriazole polymer Chiguard 5530: 1 part, modified polyurethane dispersant EFKA 4010: 1 part, pigment: 10 parts, anti-rust pigment: 10 parts, 10% dibutyltin dilaurate: 0.5 parts, silicon-based polymer BKY 085: 0.5 parts, and alkyl glycidyl ether AGE: 10 parts. The first silane-modified hybrid polymer has a highly branched molecular structure, and the second silane-modified hybrid polymer has greater elasticity than the first silane-modified hybrid polymer.

[0085] The first silane-modified hybrid polymer is silane-modified hybrid polymer HP 211; The second silane-modified hybrid polymer is silane-modified hybrid polymer HP 201.

[0086] Types of extender fillers include silica micropowder; Functional fillers include glass powder; Rheology modifiers include hydrogenated castor oil-modified polyamide waxes.

[0087] Dispersants include polycarboxylic acid ester type dispersants; Pigments include titanium dioxide; Types of rust-preventive pigments include aluminum tripolyphosphate; like Figure 1 As shown, a method for preparing a wear-resistant and anti-corrosion coating includes: S1. The first silane-modified hybrid polymer, the second silane-modified hybrid polymer, and the dispersant are subjected to a first stirring to obtain a first mixture; S2. The rheology modifier and the first mixture are stirred for a second time to obtain a second mixture; S3. The pigment, anti-rust pigment, functional filler, extender filler and the second mixture are stirred in a third stirring process to obtain a third mixture; S4. The silane coupling agent, dibutyltin dilaurate, benzotriazole polymer, silicon-based polymer, alkyl glycidyl ether and the third mixture are stirred in a fourth step to obtain a wear-resistant and anti-corrosion coating.

[0088] The first stirring speed is 1000 r / min, and the first stirring time is 5 min; The second stirring speed is 1000 r / min, and the second stirring time is 10 min; The third stirring speed is 1200 r / min, and the third stirring time is 60 min; The fourth stirring speed is 1000 r / min, and the fourth stirring time is 15 min.

[0089] Example 2 Compared to Example 1, the differences in this example are as follows, while the rest are the same: First silane-modified hybrid polymer: 28 parts, second silane-modified hybrid polymer: 12 parts, extender filler: 20 parts, functional filler: 5 parts, silane coupling agent KH560: 1 part, rheology modifier: 1 part, benzotriazole polymer Chiguard 5530: 1 part, modified polyurethane dispersant EFKA 4010: 1 part, pigment: 10 parts, anti-rust pigment: 10 parts, dibutyltin dilaurate: 0.5 parts, silicon-based polymer BKY 085: 0.5 parts, and alkyl glycidyl ether AGE: 10 parts.

[0090] Example 3 Based on the content disclosed in Example 1, the following modifications are made: First silane-modified hybrid polymer: 35 parts, second silane-modified hybrid polymer: 5 parts, extender filler: 20 parts, functional filler: 5 parts, silane coupling agent KH560: 1 part, rheology modifier: 1 part, benzotriazole polymer Chiguard 5530: 1 part, modified polyurethane dispersant EFKA 4010: 1 part, pigment: 10 parts, anti-rust pigment: 10 parts, dibutyltin dilaurate: 0.5 parts, silicon-based polymer BKY 085: 0.5 parts, and alkyl glycidyl ether AGE: 10 parts.

[0091] Comparative Example 1 Based on the content disclosed in Example 1, the following modifications are made: The first silane-modified hybrid polymer is used directly without the addition of the second silane-modified hybrid polymer, and its weight is 40 parts.

[0092] Comparative Example 2 Based on the content disclosed in Example 1, the following modifications are made: The second silane-modified hybrid polymer is used directly without adding the first silane-modified hybrid polymer, and its weight is 40 parts.

[0093] Comparative Example 3 Based on the content disclosed in Example 1, the following modifications are made: The WP 1 type silane-modified polymer from the GENIOSIL series was used in a weight ratio of 28 parts, and the XB 502 type silane-modified polymer was used in a weight ratio of 12 parts.

[0094] Relevant experimental and effect data: The performance of the wear-resistant and anti-corrosion coatings obtained in each embodiment and comparative example is shown in Table 1.

[0095] Table 1. Performance results of wear-resistant and anti-corrosion coatings in each embodiment and comparative example.

[0096] As shown in Table 1, the wear-resistant and anti-corrosion coating provided in this application embodiment uses a first silane-modified hybrid polymer as the main resin, supplemented by a second silane-modified hybrid polymer. Furthermore, through the synergistic effect between the components, the wear-resistant and anti-corrosion coating can form a dense, uniform, and strongly adhesive protective coating. This protective coating can effectively resist the erosion of the external environment, thereby significantly improving the wear resistance and corrosion resistance of the protective coating. Specific advantages are as follows: (1) The wear-resistant and anti-corrosion coating has good comprehensive performance, with a certain degree of elasticity and excellent wear resistance and impact resistance. In addition, the wear-resistant and anti-corrosion coating has good adhesion, salt spray resistance, and low-temperature flexibility. The coating products formed by the wear-resistant and anti-corrosion coating have the following properties: wear resistance (750g / 500r) ≤20mg, impact resistance ≥1m, elongation at break ≥100%, low-temperature flexibility (no cracking when bent at 180° at -30℃), adhesion (pull-out method) ≥5MPa, salt spray resistance (all passed 1000h test) and aging resistance (all passed 1000h test).

[0097] (2) The coating formed by the wear-resistant and anti-corrosion coating also has a certain self-cleaning effect. The contact angle between the coating and water is ≥90°. In the case of transporting powdered goods, the powdered goods are not easy to stick to the surface of the coating.

[0098] (3) The wear-resistant and anti-corrosion coating has excellent permeability and can be applied directly to old paint films and substrates containing rust. (4) Wear-resistant and anti-corrosion coatings have green and environmentally friendly characteristics. The solid content of wear-resistant and anti-corrosion coatings is as high as 95%, while the content of volatile organic compounds (VOCs) does not exceed 60g / L, which meets the requirements of solvent-free coatings in GB / T38597-2020 "Technical Requirements for Coatings with Low Volatile Organic Compound Content".

[0099] In addition, the method for preparing a wear-resistant and corrosion-resistant coating provided in this application is fully compatible with the existing steel shot blasting pretreatment process and high-pressure airless spraying process for trucks, and the overall preparation method is easy to modify.

[0100] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed in this application.

Claims

1. A wear-resistant and corrosion-resistant coating, characterized in that, The raw materials of the wear-resistant and anti-corrosion coating, by weight, satisfy the following: The composite silane-modified hybrid polymer comprises 30 to 50 parts, extender filler 10 to 30 parts, functional filler 3 to 5 parts, silane coupling agent 1 to 2 parts, rheology modifier 0.5 to 2 parts, and auxiliary functional additives; wherein the composite silane-modified hybrid polymer includes a first silane-modified hybrid polymer and a second silane-modified hybrid polymer, the first silane-modified hybrid polymer having a highly branched molecular structure, and the second silane-modified hybrid polymer having greater elasticity than the first silane-modified hybrid polymer.

2. The wear-resistant and anti-corrosion coating according to claim 1, characterized in that, The first silane-modified hybrid polymer is present in an amount of 25 to 35 parts by weight, and the second silane-modified hybrid polymer is present in an amount of 5 to 15 parts by weight; and / or The viscosities of the first silane-modified hybrid polymer and the second silane-modified hybrid polymer are 0.5 Pa·S to 1.2 Pa·S, respectively.

3. The wear-resistant and anti-corrosion coating according to claim 1, characterized in that, The types of fillers include silica powder and / or barium sulfate; and / or The types of functional fillers include glass powder and / or ceramic powder; and / or The rheology modifiers include hydrogenated castor oil-modified polyamide waxes and / or fumed silica.

4. The wear-resistant and anti-corrosion coating according to claim 1, characterized in that, The auxiliary functional additives, by weight, comprise: Benztriazole polymer: 1 to 3 parts, dispersant: 0.5 to 2 parts, pigment: 3 to 20 parts, anti-rust pigment: 6 to 15 parts, dibutyltin dilaurate: 0 to 0.5 parts, silicon-based polymer: 0 to 0.5 parts, and alkyl glycidyl ether: 10 to 20 parts.

5. The wear-resistant and anti-corrosion coating according to claim 4, characterized in that, The dispersant includes polycarboxylic acid ester type dispersants and / or modified polyurethane type dispersants; and / or The types of pigments include titanium dioxide and / or carbon black; and / or The types of rust-preventive pigments include aluminum tripolyphosphate and / or zinc phosphate.

6. A method for preparing the wear-resistant and anti-corrosion coating according to any one of claims 1 to 5, characterized in that, The method includes: The first silane-modified hybrid polymer, the second silane-modified hybrid polymer, and the dispersant are subjected to a first stirring to obtain a first mixture; The rheology modifier and the first mixture are stirred a second time to obtain a second mixture; The pigment, anti-rust pigment, functional filler, extender filler, and the second mixture are stirred in a third manner to obtain a third mixture; The silane coupling agent, dibutyltin dilaurate, benzotriazole polymer, silicon-based polymer, alkyl glycidyl ether, and the third mixture are stirred in a fourth step to obtain a wear-resistant and anti-corrosion coating.

7. The method according to claim 6, characterized in that, The first stirring speed is 1000 r / min to 1200 r / min, and the first stirring time is 3 min to 5 min; and / or The second stirring speed is 1000 r / min to 1200 r / min, and the second stirring time is 10 min to 15 min; and / or The third stirring speed is 1000 r / min to 1200 r / min, and the third stirring time is 60 min to 90 min; and / or The fourth stirring speed is 1000 r / min to 1200 r / min, and the fourth stirring time is 10 min to 15 min.

8. A method for preparing a wear-resistant and corrosion-resistant coating, characterized in that, The preparation method is as follows: The surface of the steel substrate is pretreated to obtain a pretreated steel substrate; A water-based primer is sprayed onto the surface of the pretreated steel substrate to obtain a primer layer; The primer layer is subjected to impurity removal treatment to obtain a pretreated primer layer; The wear-resistant and anti-corrosion coating according to any one of claims 1 to 5 is sprayed onto the surface of the pretreated primer layer to obtain a rough surface coating. The rough surface coating is dried to obtain a wear-resistant and corrosion-resistant coating.

9. A wear-resistant and corrosion-resistant coating, characterized in that, The wear-resistant and corrosion-resistant coating is prepared by the preparation method described in claim 8.

10. The wear-resistant and corrosion-resistant coating according to claim 9, characterized in that, The wear-resistant and corrosion-resistant coating includes a primer layer and a surface coating. The thickness of the primer layer is 10 μm to 20 μm, and the thickness of the surface coating is ≥200 μm.

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