Cold-resistant anticorrosive and antirust self-spraying particle elastic glue and preparation method thereof

Abstract

The application discloses a cold-resistant anticorrosive and antirust self-spraying granular elastic glue and a preparation method thereof. The elastic glue comprises the following components in percentage by mass: 15-35% of epoxy resin, 7.5-17.5% of amino resin, 9-25% of anticorrosive functional powder, 0.1-0.8% of silane coupling agent, 3-5% of elastic modifier, 1-3% of granular carrier, 0.3-0.8% of surfactant, 15-35% of diethylene glycol butyl ether, 5-10% of acetone and 4-6% of antifreeze. The self-spraying auxiliary agent and the antifreeze are compounded in the elastic glue, so that the tank pressure is sufficient and the viscosity is low at low temperature, the technical problem of difficult spraying at low temperature is solved, the elastic glue can be directly sprayed on a metal structure, a concrete surface or a pretreated anticorrosive layer, the sprayed mist is quickly solidified to form a uniform and continuous elastic protective layer at low temperature, water and salt mist penetration and small impact absorption are prevented, and the durability of the structure is improved.

Description

Technical Field

[0001] This invention relates to the field of protective materials, and in particular to a cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive and its preparation method. Background Technology

[0002] Metal structures are widely used in aerospace, automotive, shipbuilding, and chemical industries. During their service life, they are exposed to various environmental conditions for extended periods, making them highly susceptible to corrosion and rust, leading to material performance degradation and structural failure. The embrittlement of metallic materials is particularly pronounced in cold regions or low-temperature environments, placing stringent demands on protective materials.

[0003] Traditional anti-corrosion coatings, such as epoxy resins and polyurethanes, offer good protection at room temperature, but often face significant technical bottlenecks in low-temperature environments. Specifically, when the ambient temperature drops below -20°C, the molecular chain movement of most organic coating materials becomes restricted, resulting in a sharp decrease in elasticity. The coating becomes brittle and loses its inherent flexibility. Simultaneously, the adhesion between the coating and the metal substrate is significantly reduced, making it prone to peeling and cracking, leading to protective layer failure and an inability to effectively prevent corrosive media from eroding the metal substrate.

[0004] To address the aforementioned problems, several technical solutions have been proposed. For example, US Patent 8597724B2 discloses an anti-corrosion coating achieved using cold spraying technology. This technology involves impacting the substrate surface with metal powder at supersonic speeds, causing the particles to undergo plastic deformation and form a dense protective layer. The coating formed on the substrate surface by this method has excellent density and bonding strength, and can improve the corrosion resistance of metals to a certain extent. However, the cold spraying process requires specialized equipment, such as high-pressure gas systems and spray guns, making operation complex. Furthermore, the resulting coating is primarily a metal layer with limited elasticity. In environments with large temperature differences, the difference in thermal expansion coefficients may lead to internal stress concentration, inducing coating cracking or peeling. Japanese Patent JP2016172836A5 discloses an adhesive with excellent cold resistance and low hardness. This adhesive, through its special formulation design, can remain flexible and not easily become brittle in low-temperature environments, making it suitable for sealing or bonding applications under cold conditions. However, it mainly focuses on sealing or bonding functions and has not been specifically optimized for rust and corrosion prevention. Furthermore, its formulation does not take into account the needs of self-spraying applications, making it difficult to achieve large-area coverage quickly and conveniently.

[0005] In recent years, some self-spraying granular rust inhibitors have appeared on the market, such as self-spraying quick-drying rust-preventing and sound-insulating adhesives for automotive chassis armor. These products are packaged in pressurized cans, allowing users to spray them directly. They are easy to apply, cure quickly, and are suitable for rapid protection of metal parts such as automotive chassis. However, currently available self-spraying granular adhesives generally have the following shortcomings: First, their cold resistance is limited; they easily harden and become brittle at low temperatures, losing their buffering and protective function against the substrate. Second, their elastic recovery ability is insufficient; after repeated stress or temperature cycles, they are prone to permanent deformation or cracking, affecting the durability of the protective effect. Third, their rust and corrosion prevention performance mainly relies on the barrier function of the coating itself and is not specifically designed for corrosion mechanisms in low-temperature environments, thus the protective effect needs further improvement.

[0006] In summary, although existing technologies each have their own focus, none of them can simultaneously meet the composite requirements of cold resistance, corrosion and rust prevention, and self-spraying capability in low-temperature environments. Summary of the Invention

[0007] The main objective of this invention is to provide a cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive and its preparation method, aiming to solve the problems of existing self-spraying granular adhesives being difficult to spray at low temperatures, having poor adhesion, being easily cracked in coating, and having insufficient corrosion resistance.

[0008] The technical solution of this invention is:

[0009] A cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive comprises the following components in weight percentage: epoxy resin 15%–35%, amino resin 7.5%–17.5%, anti-corrosion functional powder 9%–25%, silane coupling agent 0.1%–0.8%, elastic modifier 3%–5%, granular carrier 1%–3%, surfactant 0.3%–0.8%, diethylene glycol butyl ether 15%–35%, acetone 5%–10%, and antifreeze agent 4%–6%.

[0010] In this invention, epoxy resin is used as the main film-forming substance, providing excellent adhesion, hardness and corrosion resistance. It can be bisphenol A type epoxy resin (such as E-51, E-44), which has high bonding strength and chemical resistance; or bisphenol F type epoxy resin, which has lower viscosity and is more conducive to low-temperature construction; amino resin has good compatibility with epoxy resin, and the two can form a dense cross-linked network when combined.

[0011] The present invention also incorporates an elastic modifier with strong low-temperature plasticity to improve the elastic modulus of the cured adhesive layer and maintain low hardness, so that it can expand and contract with the substrate without cracking, thereby improving corrosion resistance and protection durability.

[0012] The surfactant of this invention is nonionic, which ensures uniform dispersion of each component and prevents sedimentation; the self-spraying additive includes the solvent and propellant of the system, which can not only fully dissolve or disperse the solid resin, but also has a suitable vapor pressure, so that it can be smoothly sprayed and well atomized at low temperature.

[0013] This invention utilizes a compound system of diethylene glycol butyl ether and acetone in its self-spraying additive. These two components complement each other during the spraying process: Acetone, a low-boiling-point strong solvent (approximately 56°C), works synergistically with the propellant within the spray can to establish a suitable vapor pressure, rapidly vaporizing upon spraying and imparting excellent atomization capability to the adhesive, forming fine and uniform mist particles; Diethylene glycol butyl ether, a high-boiling-point solvent (approximately 230°C), has a moderate evaporation rate, delaying solvent evaporation after the atomized particles impact the substrate, providing sufficient leveling time, and ensuring uniform particle carrier distribution and continuous, complete film formation. This synergistic effect avoids both dry spraying and uneven particle texture caused by excessively rapid evaporation, and sagging and delayed curing caused by excessively slow evaporation, thus balancing atomization efficiency and film quality even under low-temperature application conditions.

[0014] The self-spraying additive includes diethylene glycol butyl ether and acetone, wherein diethylene glycol butyl ether accounts for 15% to 35% of the total mass of the self-spraying granular elastic adhesive, and acetone accounts for 5% to 10% of the total mass of the self-spraying granular elastic adhesive. Self-spraying additives within the above range can better ensure construction results under low-temperature construction conditions.

[0015] Building upon this foundation, the present invention introduces an antifreeze agent (such as anhydrous ethanol, ethylene glycol, etc.), whose hydroxyl groups form a hydrogen bond network with the solvent system, further lowering the freezing point of the mixed solvent and suppressing resin separation or a sudden increase in viscosity at low temperatures. The antifreeze agent, in synergy with high vapor pressure acetone, maintains stable pressure within the tank, while in synergy with diethylene glycol butyl ether, it improves low-temperature fluidity. The combination of these three agents ensures that the system maintains low viscosity and high atomization even below -20°C, guaranteeing smooth spraying and rapid curing of the adhesive in extremely cold environments. This fundamentally solves the technical problems of existing self-spraying granular adhesives, such as difficulty in spraying at low temperatures and poor atomization.

[0016] After stirring at -10°C for 30 minutes, the above formula is poured into a spray can and sprayed directly onto metal structures, concrete surfaces, or under pre-treated anti-corrosion layers using a 0.8mm nozzle in an environment between -20°C and 10°C. It cures rapidly within 5 minutes, forming a uniform and continuous elastic protective layer with a thickness of approximately 0.3mm. This layer can prevent moisture and salt spray penetration and absorb minor impacts, thereby improving the durability of the structure.

[0017] Furthermore, the anti-corrosion functional powder comprises graphite powder, calcium carbonate, and molybdate, wherein the graphite powder accounts for 1% to 5% of the total mass of the self-spraying granular elastic adhesive, the calcium carbonate accounts for 7% to 15% of the total mass of the self-spraying granular elastic adhesive, and the molybdate accounts for 1% to 5% of the total mass of the self-spraying granular elastic adhesive. On the one hand, the flake graphite powder is layered in the coating film, and the high conductivity, high strength, and high thermal stability of the graphite powder provide a strong guarantee for rust prevention; the synergistic effect of molybdate and carbonate forms a dense passivation layer on the metal surface, significantly reducing the corrosion rate, and is environmentally friendly and non-toxic, meeting the protection requirements of marine and salt spray environments; the three components work synergistically to significantly extend the penetration path of corrosive media; on the other hand, calcium carbonate also enhances the impact resistance of the coating formed by the elastic adhesive, and strengthens its mechanical properties and durability.

[0018] Preferably, the graphite powder has a particle size of 0.1~10μm and the calcium carbonate has a particle size of 1250 mesh; powders within the above range are more effective.

[0019] Furthermore, the elastic modifier is a polysiloxane or a polyether polyol. Polysiloxanes can significantly improve low-temperature elasticity; polyether polyols have better compatibility with epoxy resins.

[0020] Furthermore, the particulate carrier is a ceramic microsphere with a particle size of 30-80 μm. The particulate carrier consists of uniformly dispersed fine ceramic / polymer particles with a particle size of 30-80 μm, possessing both flowability and atomization effects from spray formation. The ceramic microspheres are spherical particles of inorganic ceramic materials, which can be hollow or solid; the material is alumina, silicon oxide, silicon carbide, zirconium oxide, etc. More preferably, the ceramic microspheres are made of SiC material, which has better wear resistance. Controlling the particle size within the range of 30-80 μm avoids excessive refinement that would cause the particle texture to disappear, while also controlling the settling velocity to ensure mechanical properties and stability.

[0021] Furthermore, the cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive also includes a corrosion inhibitor, which is a benzotriazole corrosion inhibitor. The corrosion inhibitor benzotriazole is specific to certain metals and has a synergistic anti-corrosion effect with molybdates.

[0022] Furthermore, the antifreeze agent is one or more of anhydrous ethanol, ethylene glycol, propylene glycol, methanol, and isopropanol. It can significantly lower the freezing point of liquid mixtures, improving the feasibility of spraying at -40℃. Without antifreeze, the thinner alone cannot achieve a synergistic effect, directly leading to nozzle clogging at low temperatures. This indicates that without antifreeze assistance, precipitation easily occurs at low temperatures, resulting in low atomization, poor spraying effect, insufficient hiding power, difficulty in pressure adjustment, and a tendency to drip or clog valves and nozzles, leading to poor workability.

[0023] This invention also provides a method for preparing a cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive, comprising the following steps:

[0024] S1. The epoxy resin, amino resin and graphite powder are mixed at -10℃ to 0℃;

[0025] S2. Add the molybdate and calcium carbonate to disperse and form a suspension;

[0026] S3. Add the elastic modifier, diethylene glycol butyl ether, acetone and antifreeze, and stir until the particles are completely coated;

[0027] S4. Add the surfactant and particulate carrier, and continue stirring until evenly dispersed to obtain the cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive.

[0028] To prevent the layered filler graphite powder from agglomerating or depositing at the bottom, which would significantly reduce its electrical and thermal conductivity, this invention prioritizes mixing the graphite powder with the resin system. This allows the graphite powder to be fully dispersed and wetted in a low-viscosity resin solution, forming a uniform dispersion system. Mixing is carried out at a low temperature of -10℃ to 0℃ to avoid premature curing or uneven reaction. Then, water-soluble corrosion inhibitor molybdate and inorganic filler calcium carbonate are added for dispersion, breaking up agglomerates and forming a uniform suspension. This ensures that the particle surface can contact the corrosion inhibitor, providing a uniform foundation for subsequent coating processes. Subsequently, during the stirring process, the elastic modifier, diethylene glycol butyl ether, acetone, and antifreeze are added. The elastic modifier is adsorbed onto the surface of graphite powder, molybdate, and calcium carbonate, improving the interfacial bonding between the particles and the resin matrix. Then, it is dispersed and wetted by diethylene glycol butyl ether and acetone, and the antifreeze lowers the freezing point. Finally, the particle carrier and surfactant are introduced to prevent premature particle breakage and affect the particle texture. The surfactant is adsorbed on the surface of ceramic microspheres, reducing the solid-liquid interfacial tension and promoting dispersion. When no visible agglomeration is observed, the cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive is obtained.

[0029] When the user presses the nozzle, the pressure inside the can is released instantly, and the mixture of adhesive and solvent is sprayed out at high speed. Due to the low boiling point and high volatility of the self-spraying solvent, it rapidly vaporizes upon spraying, forming tiny mist-like particles. After reaching the substrate surface, the solvent further evaporates, and the resin aggregates. During this process, the particle carriers are uniformly arranged in the coating film, forming a microscopic rigid skeleton. Subsequently, the epoxy resin and amino resin undergo a cross-linking and curing reaction, forming a three-dimensional network structure, while the elastic modifier is embedded within it as a flexible segment, ultimately forming a granular coating film that is hard inside and tough outside, corrosion-resistant, rust-proof, and has an elastic feel.

[0030] Furthermore, after step S4, the method further includes:

[0031] S5. The cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive is first filtered, then degassed under vacuum, and then filled into the self-spraying tank.

[0032] S6. Add glass beads to the spray can and install a valve;

[0033] S7. Fill with propellant, and control the pressure at room temperature to not exceed 0.6 MPa to obtain the cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive after canning.

[0034] First, filter out undispersed agglomerates from the cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive to prevent nozzle clogging. Then, perform vacuum degassing to remove air bubbles and prevent pinholes during spraying. Next, add glass beads to the self-spraying can so that they tumble when shaken, promoting material mixing. Finally, add propellant and control the pressure to not exceed 0.6 MPa to ensure spraying effect.

[0035] Furthermore, the propellant includes one or more of dimethyl ether, nitrogen, and carbon dioxide.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] (1) Significantly improved low-temperature construction performance: The self-spraying adhesive of the present invention can maintain suitable viscosity and can pressure in environments of -20℃ and below, with uniform atomization and no nozzle clogging, and the coating is continuous and complete after curing. Compared with similar products on the market, which are prone to problems such as difficult spraying, poor atomization, sagging or dry spraying at low temperatures, the present invention achieves stable construction of self-spraying granular adhesive under extremely cold conditions.

[0038] (2) Synergistic enhancement of anti-corrosion and anti-rust performance: Comparative studies show that the combination of molybdate and calcium carbonate is significantly better than the combination of phosphate and calcium carbonate in terms of salt spray resistance, increasing the salt spray resistance time from 480h to more than 700h. Furthermore, the combination with benzotriazole corrosion inhibitors can further enhance the synergistic anti-rust effect.

[0039] (3) Simultaneous optimization of low-temperature mechanical properties and adhesion: This invention uses polysiloxane or polyether polyol as an elastic modifier to introduce flexible segments into the epoxy-amino crosslinking network, so that the coating maintains good flexibility and impact resistance below -20℃, avoiding low-temperature brittleness. At the same time, the introduction of silane coupling agent enhances the interfacial bonding force between the resin and the metal substrate, and the adhesion grade can reach 0.

[0040] (4) Construction efficiency and applicability are greatly improved: The present invention adopts self-spraying can packaging, and the granular carrier and self-spraying additive work together to achieve rapid and uniform coverage. The construction efficiency is 2 to 3 times higher than the traditional brushing and spraying process, and it is suitable for large-area or complex-shaped on-site operations. Attached Figure Description

[0041] Figure 1 This is a construction effect diagram of spraying in an environment of -20℃ according to Embodiment 7 of the present invention;

[0042] Figure 2 This is a construction effect diagram of spraying in an environment of -40℃ according to Embodiment 7 of the present invention;

[0043] Figure 3 This is a diagram showing the application effect of spraying in Comparative Example 1 of the present invention at -20℃.

[0044] Figure 4 This is a diagram illustrating the application effect of spraying in Comparative Example 2 of the present invention at -20℃.

[0045] Figure 5 This is a diagram showing the application effect of spraying in Comparative Example 3 of the present invention at -20℃. Detailed Implementation

[0046] The present invention will be further described below with reference to specific embodiments. It should be noted that, without conflict, the technical features involved in the following embodiments or in each embodiment can be arbitrarily combined to form new embodiments. Unless otherwise specified, the raw materials, equipment, and test conditions used in the following embodiments can all be obtained through conventional means.

[0047] Examples 1-7

[0048] The formulation composition of Examples 1-7 is shown in Table 1:

[0049] Table 1:

[0050]

[0051] According to the formula in Table 1, the specific preparation steps of the cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesives in Examples 1-7 are as follows:

[0052] S1. Add amino resin, epoxy resin and graphite powder to the reactor at -10℃, turn on the stirrer, turn on the speed of 300r / min and stir for 60min to mix them evenly, then turn off the stirrer.

[0053] S2. Mix molybdate and corrosion inhibitor, turn on the mixer, adjust the speed to 800 r / min, disperse and stir for 30 min, then slowly add calcium carbonate, adjust the speed to 1000 r / min, and disperse in a high-speed shear machine to form a uniform suspension;

[0054] S3. Add polysiloxane elastic modifier, diethylene glycol butyl ether, acetone and antifreeze to step S2 in sequence and continue stirring for 20 minutes until the particles are completely coated.

[0055] S4. Add surfactant (nonionic) and ceramic microspheres (SiC) to step S3 in sequence and continue stirring for 60 minutes until the particles are completely and uniformly dispersed to obtain cold-resistant, corrosion-resistant and rust-proof self-spraying elastic granules.

[0056] The prepared elastic adhesive is filtered through a 200-mesh screen and poured into a Ø65×240 self-spraying can (nominal diameter of the can is 65mm and nominal height is 240mm) at a weight ratio of 430g±5g. Two glass beads are added to the can, a valve is inserted, and the can is sealed. Then, 100g±2g of dimethyl ether propellant and 0.8g±0.05g of nitrogen are added, and the pressure is controlled not to exceed 0.6MPa (25℃). The sealing performance and spray performance are checked, the button is installed, and the outer cap is closed to obtain the canned cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive.

[0057] Comparative Example 1

[0058] The difference from Example 7 is that the self-spraying granular elastic adhesive self-spraying additive in this comparative example uses ethyl acetate instead of diethylene glycol butyl ether, with the amount remaining the same, while the rest of the formulation and preparation method are the same.

[0059] Comparative Example 2

[0060] The difference from Example 7 is that xylene is used instead of acetone in the self-spraying granular elastic adhesive self-spraying additive of this comparative example, while the amount remains the same, and the rest of the formula and preparation method are the same.

[0061] Comparative Example 3

[0062] The difference from Example 7 is that the self-spraying granular elastic adhesive self-spraying additive in this comparative example uses 350g of diethylene glycol butyl ether alone, while the rest of the formulation and preparation method are the same.

[0063] Comparative Example 4

[0064] The difference from Example 7 is that the self-spraying elastic adhesive particle carrier in this comparative example uses nano-alumina powder, the amount of which remains the same, while the rest of the formula and preparation method are the same.

[0065] Comparative Example 5

[0066] The difference from Example 7 is that the rust inhibitor molybdate in this comparative example is replaced with phosphate, while the amount remains the same. The rest of the formulation and preparation method are the same.

[0067] Test case

[0068] Test samples: Cold-resistant, corrosion-resistant and rust-proof self-spraying granular elastic adhesives prepared in Examples 1-7 and self-spraying granular elastic adhesives prepared in Comparative Examples 1-5;

[0069] Test methods: see Table 2;

[0070] Test results: see Tables 3 and 4.

[0071] Table 2: Performance Test Methods for Cold-Resistant, Corrosion-Proof, and Rust-Proof Sprayed Granular Elastic Adhesive

[0072]

[0073] Table 3: Performance test results of the cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesives provided in Examples 1-7

[0074]

[0075] From Table 3 and Figures 1-2 The performance test results show that the 7 groups of cold-resistant, anti-corrosion, and rust-proof self-spraying granular elastic adhesives prepared by this invention have stable spray conditions, surface drying time of about 1 hour, strong impact resistance, pass low-temperature stability, are water-resistant and impermeable, have excellent rust prevention, good appearance, strong granular texture, and good construction performance at both -20℃ and -40℃. Among them, the cold-resistant, anti-corrosion, and rust-proof self-spraying granular elastic adhesive prepared in Example 7 has the best spraying effect, strong pressure, no bubbling or flying fibers, clear texture, and strong granular texture to the touch, meeting the product technical requirements.

[0076] Table 4: Performance test results of the self-spraying granular elastic adhesives provided in Comparative Examples 1-5

[0077]

[0078] As shown in Tables 3-4, the performance test results of the 7 groups of cold-resistant, corrosion-resistant, and rust-proof self-spraying granular adhesives prepared in this invention are compared with those of Comparative Examples 1-5. The cold-resistant, corrosion-resistant, and rust-proof self-spraying granular adhesives prepared in Examples 1-7 of this invention have high atomization properties, which can form effective particles to ensure rust prevention and durability, while the particles are not too large to clog the nozzle, resulting in better spraying effect and stable performance.

[0079] See attached document Figures 3-5 The self-spraying granular elastic adhesives prepared in Comparative Examples 1-5 exhibited poor overall performance. Comparative Examples 1, 2, and 3 all showed difficulties in low-temperature application, failing to form effective atomized particles, resulting in unsatisfactory spraying effects. Furthermore, insufficient pressure at low temperatures led to slightly lower adhesion levels. This demonstrates that the low-temperature solvents diethylene glycol butyl ether, acetone, and the antifreeze ethanol of this invention significantly improve the spraying performance of the paint film. In Comparative Example 4, replacing the particle carrier with nano-alumina powder significantly reduced impact resistance and resulted in insufficient low-temperature stability and smaller atomized particles. Comparative Example 5, using a mixture of calcium carbonate and phosphate, showed inferior salt spray resistance compared to the mixture of calcium carbonate and molybdate. Therefore, the comparative examples verified the crucial impact of the self-spraying additive formulation on application performance. Changing or replacing any single solvent alone leads to problems such as poor atomization at low temperatures, lack of granular texture, or nozzle clogging, proving that the self-spraying additive combination of this invention possesses irreplaceable synergistic advantages.

[0080] Finally, it should be noted that the above embodiments are merely illustrative of the principles, performance, and effects of the present invention, and are not intended to limit the present invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive, characterized in that, It comprises the following components by weight percentage: epoxy resin 15%–35%, amino resin 7.5%–17.5%, anti-corrosion functional powder 9%–25%, silane coupling agent 0.1%–0.8%, elastic modifier 3%–5%, particulate carrier 1%–3%, surfactant 0.3%–0.8%, diethylene glycol butyl ether 15%–35%, acetone 5%–10%, and antifreeze 4%–6%; The anti-corrosion functional powder includes graphite powder, calcium carbonate, and molybdate, wherein the graphite powder accounts for 1% to 5% of the total mass of the self-spraying granular elastic adhesive, the calcium carbonate accounts for 7% to 15% of the total mass of the self-spraying granular elastic adhesive, and the molybdate accounts for 1% to 5% of the total mass of the self-spraying granular elastic adhesive. The particulate carrier is a ceramic microsphere with a particle size of 30~80μm; The elastic modifier is a polysiloxane or a polyether polyol.

2. The cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive according to claim 1, characterized in that, The ceramic microspheres are made of SiC material.

3. The cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive according to claim 1, characterized in that, It also includes a preservative, which is a benzotriazole corrosion inhibitor.

4. The cold-resistant, corrosion-resistant, and rust-proof self-spraying granular elastic adhesive according to claim 1, characterized in that, The antifreeze is one or more of anhydrous ethanol, ethylene glycol, propylene glycol, methanol, and isopropanol.

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