Aerosol type automobile cavity anti-rust wax and its preparation method and application

Abstract

The present application relates to an aerosol-type automotive cavity anti-rust wax, its preparation method, and application. The aerosol-type automotive cavity anti-rust wax comprises, by mass percentage, 15% to 25% calcium petroleum sulfonate, 2% to 8% wax, 1% to 5% thixotropic agent, 40% to 65% organic solvent, and 15% to 25% propellant. The organic solvent comprises a volatile alkane solvent with a boiling point less than 80°C and a solvent oil with a boiling point greater than or equal to 80°C. The above-mentioned aerosol-type automotive cavity anti-rust wax, through the combination of specific components of solvent oil, volatile alkane solvent, and propellant, can produce an aerosol-type automotive cavity anti-rust wax with excellent storage stability and no settling. Even after long-term storage, it can still be sprayed smoothly and evenly, is easy to use, and has a stable effect. Furthermore, after spraying, as the volatile alkane solvent and propellant evaporate, the content of the other components of the system increases, enhancing the anti-sagging properties of the anti-rust film and forming a uniform and fine film.

Description

Technical Field

[0001] The present application relates to the field of automobile anti-corrosion, and in particular to an aerosol-type automobile cavity anti-rust wax and a preparation method and application thereof. Background Art

[0002] Automotive cavities are a weak point in vehicle corrosion protection. Currently, automotive cavity anti-rust wax is commonly used to address this corrosion problem. However, commercially available cavity anti-rust wax is typically packaged as a barreled liquid, requiring specialized intracavity wax injection techniques. This is difficult for consumers to operate and hinders self-maintenance. Furthermore, because the wax injection openings in automotive cavities are generally small, operators struggle to observe the internal coating during application. Therefore, traditional wax injection methods often add an excessive amount of wax to avoid blind spots. This excess wax can then flow downward, resulting in uneven film formation within the cavity. Summary of the Invention

[0003] Based on this, it is necessary to provide an aerosol type automobile cavity anti-rust wax and its preparation method and application to overcome the problems of inconvenience in use and uneven film formation of traditional automobile cavity anti-rust wax.

[0004] In a first aspect of the present application, an aerosol-type automobile cavity anti-rust wax is provided.

[0005] An aerosol type automobile cavity anti-rust wax comprises the following raw materials in percentage by mass:

[0006] Calcium petroleum sulfonate 15%~25%,

[0007] Wax 2%~8%,

[0008] Thixotropic agent 1%~5%,

[0009] Organic solvent 40%~65%, and

[0010] Propellant 15%~25%;

[0011] The organic solvent includes a volatile alkane solvent and solvent oil, the boiling point of the volatile alkane solvent is less than 80°C, and the boiling point of the solvent oil is greater than or equal to 80°C.

[0012] In some embodiments, the mass ratio of the volatile alkane solvent to the solvent oil is 1:(1.5~4); in terms of mass percentage, the content of the volatile alkane solvent is 8%~26%, and the content of the solvent oil is 24%~52%.

[0013] In some embodiments, the volatile alkane solvent includes one or more of n-pentane, n-hexane, isohexane, and cyclopentane.

[0014] In some embodiments, the solvent oil includes one or more of D80, D90, limonene and n-heptane.

[0015] In some embodiments, the thixotropic agent includes fumed silica.

[0016] In some embodiments, the wax comprises microcrystalline wax.

[0017] In some embodiments, the aerosol type automobile cavity anti-rust wax further comprises 4% to 10% of a filler, as a percentage by mass of the aerosol type automobile cavity anti-rust wax; the filler comprises one or both of calcium carbonate and talc.

[0018] In some embodiments, the aerosol type automobile cavity anti-rust wax comprises, by weight percentage, 15% to 20% of the petroleum calcium sulfonate, 3% to 5% of the wax, 2% to 4% of the thixotropic agent, 35% to 40% of the solvent oil, 10% to 15% of the volatile alkane solvent, 15% to 20% of the propellant, and 6% to 8% of the filler.

[0019] In a second aspect of the present application, a method for preparing the above-mentioned aerosol-type automobile cavity anti-rust wax is provided.

[0020] A method for preparing the above-mentioned aerosol-type automobile cavity anti-rust wax comprises the following steps:

[0021] mixing the wax, the calcium petroleum sulfonate and the solvent oil, heating and melting them to form a precursor solution;

[0022] mixing the thixotropic agent and the precursor solution to form a dispersed phase;

[0023] mixing the volatile alkane solvent with the dispersed phase and sealing;

[0024] Fill with the propellant and mix.

[0025] In a third aspect of the present application, there is provided a use of the above-mentioned aerosol-type automobile cavity anti-rust wax in automobile cavity rust prevention.

[0026] This application utilizes a specific combination of solvent oil, a volatile alkane solvent, and a propellant to create an aerosol-type automotive cavity anti-rust wax with excellent storage stability and no settling. This aerosol allows for smooth and even spraying even after long-term storage, offering convenient use and stable results. Furthermore, after spraying, as the volatile alkane solvent and propellant evaporate, the levels of the other components in the system increase, enhancing the anti-sagging properties of the anti-rust film and ensuring a uniform and smooth film formation. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined. In this application, "at least one" means more than one, such as one, two, or more than two. "Multiple" or "several" means at least two, such as two, three, etc.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe a feature or characteristic, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein are understood to include any and all subranges subsumed therein.

[0031] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0032] In this application, “above” or “below” includes the number itself. For example, “1 below” includes 1.

[0033] Unless otherwise specified, the temperature parameters in this application allow for both constant temperature treatment and temperature fluctuations within a certain temperature range. It should be understood that the constant temperature treatment allows for temperature fluctuations within the accuracy range of instrument control. Fluctuations within ranges such as ±5°C, ±4°C, ±3°C, ±2°C, and ±1°C are permitted.

[0034] Metal corrosion is one of the main causes of metal material loss and can significantly impact the safety of metal substrates. During the automotive design process, cathodic electrophoretic coating is often used to enhance the vehicle's corrosion resistance. However, automobiles often contain unique cavities, such as those found in door sills, side sills, and pillars, often designed to enhance structural stability. Within these cavities, the shielding effect of the metal weakens the electrophoretic effect, reducing the thickness of the electrophoretic coating to typically only 30% to 50% of the normal coating thickness. In areas such as weld seams, interlayers, and voids, the coating is virtually absent, with only a 2μm to 4μm phosphate film remaining. Furthermore, due to poor air circulation within these cavities, any ingress of water can lead to prolonged dampness. These factors make automotive cavities highly susceptible to corrosion, and even severe corrosion penetration, posing a threat to driving safety.

[0035] In order to solve the above problems, automobile cavity anti-rust wax came into being. By injecting automobile cavity anti-rust wax into the cavity, the fluid liquid cavity anti-rust wax covers the cavity surface and forms a solidified film, thereby protecting the metal from corrosion.

[0036] However, traditional automotive cavity anti-rust wax has the following issues: 1. Inconvenient application. Application requires specialized intracavity wax injection methods, including an additional guide tube to assist with wax injection, making it difficult for consumers to apply the wax themselves. 2. Uneven film formation. The wax injection openings in automotive cavities are generally small, making it difficult to monitor the internal coating during application. To ensure a complete coating, overfilling of the wax is often necessary, which not only wastes the anti-rust wax but also causes excess wax to accumulate at the bottom of the cavity, negatively impacting the curing process.

[0037] To address the above-mentioned issues, one embodiment of the present application provides an aerosol-type anti-rust cavity wax for automobiles. This aerosol-type anti-rust cavity wax for automobiles is characterized by easy application and uniform spraying, and is widely applicable both in industrial production and in daily consumer use, as well as in subsequent automobile repair and maintenance.

[0038] An aerosol type automobile cavity anti-rust wax comprises the following raw materials in percentage by mass:

[0039] Calcium petroleum sulfonate 15%~25%,

[0040] Wax 2%~8%,

[0041] Thixotropic agent 1%~5%,

[0042] Organic solvent 40%~65%, and

[0043] Propellant 15%~25%;

[0044] The organic solvent includes a volatile alkane solvent and solvent oil. The boiling point of the volatile alkane solvent is less than 80°C, and the boiling point of the solvent oil is greater than or equal to 80°C.

[0045] In some embodiments, the boiling point of the volatile alkane solvent is greater than or equal to 30°C, and the boiling point of the solvent naphtha is less than or equal to 300°C.

[0046] In some embodiments, the mass percentage of wax in the aerosol automobile cavity anti-rust wax can be, but is not limited to, 2%, 3%, 4%, 5%, 6%, 7%, 8% or other values ​​within the range of 2% to 8%.

[0047] In some embodiments, the mass percentage of calcium petroleum sulfonate in the aerosol automobile cavity anti-rust wax can be, but is not limited to, 15%, 20%, 25%, or other values ​​within the range of 15% to 25%.

[0048] In some embodiments, the mass percentage of the thixotropic agent in the aerosol automobile cavity anti-rust wax can be, but is not limited to, 1%, 2%, 3%, 4%, 5%, or other values ​​within the range of 1% to 5%.

[0049] In some embodiments, the mass percentage of the organic solvent in the aerosol automobile cavity anti-rust wax can be, but is not limited to, 10%, 15%, 20%, 25% or other values ​​within the range of 40% to 65%.

[0050] In this application, an aerosol-type automotive cavity anti-rust wax uses calcium petroleum sulfonate and wax as its primary anti-rust ingredients. Metal surfaces are susceptible to rust and corrosion when exposed to air, moisture, and some corrosive media. When calcium petroleum sulfonate is applied to a metal surface, it adsorbs and forms a corrosion protection film, which inhibits the metal's corrosion by isolating it from external corrosive media. Furthermore, wax has excellent film-forming properties, resulting in a continuous, dense wax film. Combining calcium petroleum sulfonate and wax creates a corrosion protection film on the metal surface that combines strength with corrosion protection.

[0051] In the present application, the organic solvent includes a volatile alkane solvent and a solvent oil. Among them, the boiling point of the volatile alkane solvent is less than 80°C and it is relatively volatile at room temperature. The boiling point of the solvent oil is greater than or equal to 80°C and is relatively non-volatile at room temperature. Both the alkane solvent and the solvent oil have good solubility with wax, which is beneficial to improve the stability of the system in the liquid phase to avoid the problem of phase separation after long-term storage. On the other hand, when the aerosol type automobile cavity anti-rust wax is sprayed and used, the volatile alkane solvent will evaporate from the components at a relatively faster rate, thereby increasing the content of other components in the uncured wax film hanging on the cavity, which is beneficial to improve the anti-sagging performance and anti-corrosion ability of the wax film. According to experimental tests, when sprayed, the components of the aerosol-type automobile cavity anti-rust wax will come into contact with the air in the form of tiny droplets. The contact area is large, and the volatilization process of the solvent is generally fast. By controlling the boiling point of the volatile alkane solvent to be less than 80°C, the anti-sagging performance of the aerosol can be improved while improving the liquid phase storage stability, and finally a wax film with uniform film formation and strong anti-corrosion ability is obtained. However, if the solvent volatilization rate in the system is too fast, the curing rate of the wax film will be too fast. Especially for the surface of the wax film, too fast surface curing will hinder the volatilization of other solvents inside the wax film, resulting in incomplete curing or pinholes on the surface, affecting the anti-corrosion ability after the final film formation. For this reason, the present application can also ensure that the curing speed of the system is not too fast by formulating a high-boiling point solvent oil, so as to obtain an aerosol-type automobile cavity anti-rust wax with both anti-sagging performance and anti-corrosion ability.

[0052] In some embodiments, the mass ratio of the volatile alkane solvent to the solvent oil is 1:(1.5-4). In terms of mass percentage, the content of the volatile alkane solvent is 8%-26%, and the content of the solvent oil is 24%-52%. The mass ratio of the volatile alkane solvent to the solvent oil can be, but is not limited to, 1:1.5, 1:2, 1:2.5, 1:3, 1:3.5, 1:4, or other values ​​within the range of 1:(1.5-4).

[0053] In some embodiments, the volatile alkane solvent includes one or more of n-pentane, n-hexane, isohexane, and cyclopentane.

[0054] In some embodiments, the solvent naphtha includes one or more of D80, D90, limonene, and n-heptane.

[0055] In some embodiments, the thixotropic agent includes fumed silica. When the fumed silica is dispersed in the medium, hydrogen bonding occurs between the silica particles through the silanol groups on their surfaces, forming a three-dimensional silica network, which limits the fluidity of the system, increases the viscosity, and plays a thickening role. When subjected to shear force, the hydrogen bonds are destroyed, causing the viscosity of the system to decrease, resulting in a thixotropic effect. Once the shear force disappears, the hydrogen bonds will be re-formed, and the viscosity of the system will gradually rise, thereby reflecting thixotropy. Adding a certain amount of fumed silica to aerosol type automobile cavity anti-rust wax can improve the shortcoming of aerosol type automobile cavity anti-rust wax being easy to flow, and is conducive to obtaining a uniform and stable wax film in the cavity.

[0056] In some embodiments, the wax includes microcrystalline wax. Microcrystalline wax has the characteristics of high film strength and fine film formation, but the solubility of microcrystalline wax is relatively poor and it is not easy to add too much.

[0057] In some embodiments, the aerosol-type automobile cavity anti-rust wax further comprises 4% to 10% filler, measured as a percentage by mass of the aerosol-type automobile cavity anti-rust wax. The mass percentage of the filler in the aerosol-type automobile cavity anti-rust wax may be, but is not limited to, 4%, 5%, 6%, 7%, 8%, 9%, 10%, or other values ​​within the range of 4% to 10%. Optionally, the filler comprises one or both of calcium carbonate and talc. Adding fillers can enhance the vibration damping effect of the coating and reduce the noise conduction efficiency of the cavity structure.

[0058] In some embodiments, the aerosol type automobile cavity anti-rust wax comprises, by weight percentage, 15% to 20% of the petroleum calcium sulfonate, 3% to 5% of the wax, 2% to 4% of the thixotropic agent, 35% to 40% of the solvent oil, 10% to 15% of the volatile alkane solvent, 15% to 20% of the propellant, and 6% to 8% of the filler.

[0059] In some embodiments, the propellant comprises liquefied petroleum gas. Optionally, the liquefied petroleum gas comprises one or both of propane and butane.

[0060] Another embodiment of the present application provides a method for preparing the above-mentioned aerosol-type automobile cavity anti-rust wax.

[0061] The preparation method of the aerosol type automobile cavity anti-rust wax comprises the following steps:

[0062] Mix wax, petroleum calcium sulfonate and solvent oil, heat and melt to form a precursor solution;

[0063] mixing the thixotropic agent and the precursor solution to form a dispersed phase;

[0064] A volatile alkane solvent is mixed with the dispersed phase and sealed;

[0065] Charge propellant and mix.

[0066] In some embodiments, the thixotropic agent, filler, and precursor solution are mixed to form a dispersed phase.

[0067] It is understood that in the preparation method of the aerosol-type automobile cavity anti-rust wax of this embodiment, the mass percentages of wax, petroleum calcium sulfonate, solvent oil, thixotropic agent, filler, volatile alkane solvent and propellant can be selected accordingly above and will not be repeated here.

[0068] In some embodiments, when the wax is added to the solvent oil, the system is heated to 70° C. to 90° C. until the wax is completely dissolved to form a precursor solution.

[0069] In some embodiments, after forming the precursor solution and before mixing the thixotropic agent, filler, and precursor solution, the system is cooled to 40° C. to 60° C.

[0070] In some embodiments, the thixotropic agent, filler, and precursor solution are mixed and stirred at 1000 rpm to 1500 rpm for 5 to 20 minutes to form a dispersed phase.

[0071] In some embodiments, after the volatile alkane solvent is mixed with the dispersed phase, the mixture is stirred at 1000 r / min to 1500 r / min for 3 min to 10 min.

[0072] Another embodiment of the present application provides a use of the above-mentioned aerosol automobile cavity anti-rust wax in automobile cavity rust prevention.

[0073] In some embodiments, a container containing the aforementioned aerosol-type automotive cavity anti-rust wax is equipped with a suitable spray assembly. After cleaning the area to be anti-rusted, press the spray nozzle at a distance of 10 to 20 cm from the surface of the area to be anti-rusted for 2 to 10 seconds, and allow it to dry naturally.

[0074] It is understood that aerosol car cavity anti-rust wax can be prepared directly in an aerosol can. At this time, just clean the area to be anti-rusted, press the nozzle at a distance of 10cm to 20cm from the surface of the anti-rusted area for 2s to 10s, and wait for it to dry naturally.

[0075] The present application is further described in detail below with reference to specific embodiments.

[0076] In the following specific examples and comparative examples, the raw materials used, unless otherwise specified, are all commercially available products; the instruments used, unless otherwise specified, are all commercially available products; and the processes used, unless otherwise specified, are all routinely selected by those skilled in the art.

[0077] Example 1

[0078] The raw materials of the aerosol-type automobile cavity anti-rust wax of this embodiment are, by mass percentage, as follows: calcium petroleum sulfonate, with a content of 20%; solvent oil is D80, with a content of 35%; volatile alkane solvent is isohexane, with a content of 10%; thixotropic agent is fumed silica, with a content of 4%; microcrystalline wax, with a content of 5%; fillers are calcium carbonate and talc, with a content of calcium carbonate of 3% and a content of talc of 3%; and propellants are propane and butane, with propane accounting for 6% and butane accounting for 14%.

[0079] The preparation method of the aerosol-type automotive cavity anti-rust wax of this embodiment is as follows: microcrystalline wax, calcium petroleum sulfonate, and solvent oil D80 are mixed, the system is heated to 80°C, and the temperature is maintained for 10 minutes to form a precursor solution. The system is cooled by 60°C, fumed silica, calcium carbonate, talc, and the precursor solution are mixed, and stirred at 1200 rpm for 20 minutes to form a dispersed phase. Isohexane is mixed with the dispersed phase, stirred at 1200 rpm for 10 minutes, and sealed in a container with an air injection component. Propane and butane are then added to obtain the aerosol-type automotive cavity anti-rust wax.

[0080] Example 2

[0081] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this embodiment are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that the content of petroleum calcium sulfonate is 25%; the solvent oil is D90, the content of which is 30%.

[0082] The preparation method of the aerosol type automobile cavity anti-rust wax of this embodiment is the same as the preparation method of the aerosol type automobile cavity anti-rust wax of Example 1.

[0083] Example 3

[0084] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this embodiment are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that: the content of calcium petroleum sulfonate is 15%; the volatile alkane solvent is cyclopentane, the content of which is 15%.

[0085] The preparation method of the aerosol type automobile cavity anti-rust wax of this embodiment is the same as the preparation method of the aerosol type automobile cavity anti-rust wax of Example 1.

[0086] Example 4

[0087] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this embodiment are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that the content of isohexane is 25% and the content of D80 is 25%.

[0088] Comparative Example 1

[0089] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this comparative example are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that the content of calcium petroleum sulfonate is 10% and the content of D80 is 45%.

[0090] Comparative Example 2

[0091] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this comparative example are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that: no fumed silica is added, the content of calcium carbonate is 5%, and the content of talc is 5%.

[0092] Comparative Example 3

[0093] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this comparative example are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that: no microcrystalline wax is added, and the content of petroleum calcium sulfonate is 25%.

[0094] Comparative Example 4

[0095] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this comparative example are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that the content of microcrystalline wax is 12%, the content of D80 is 30%, and the content of isohexane is 8%.

[0096] Comparative Example 5

[0097] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this comparative example are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that: no volatile alkane solvent is added, and the content of D80 is 45%.

[0098] Comparative Example 6

[0099] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this comparative example are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that: no solvent oil is added and the content of isohexane is 45%.

[0100] Comparative Example 7

[0101] The raw materials and preparation method of the aerosol type automobile cavity anti-rust wax of this comparative example are basically the same as those of the aerosol type automobile cavity anti-rust wax of Example 1, except that: no volatile alkane solvent is added, the D80 solvent oil content is 25%; the propellant content is 40%, of which propane is 12% and butane is 28%.

[0102] Test Case

[0103] Experimental Procedure: Each example and comparative example aerosol-type automotive cavity anti-rust wax was placed in a 50°C oven. The wax was removed every 10 days, allowed to cool to room temperature, and its appearance was observed. Leveling and neutral salt spray tests were also performed. This was continued for 90 days.

[0104] The experimental steps for testing coating sag are as follows: Place a flat 20cm x 50cm tinplate sheet vertically on a wall. Spray 3g of the coating solution onto the sheet as normal. Place an aluminum foil container underneath the sheet to collect any dripping liquid. After the coating dries, weigh the dripping liquid collected in the container and evaluate the sag performance. Less than 1g is considered excellent, 1g-2g is considered fair, and greater than 2g is considered poor. The smoothness of the coating after drying is also checked.

[0105] The neutral salt spray test procedure is as follows: Testing is conducted for a total of 12 days in accordance with the test method of GB / T10125-2012. The surface condition of the test sample is evaluated every day. Visual inspection of the sample indicates compliance with corrosion protection standards if no rust is observed. The industry generally considers one day of neutral salt spray resistance equivalent to one year of no noticeable corrosion at room temperature.

[0106] The test results of various embodiments and comparative examples are shown in Tables 1 and 2.

[0107] Table 1

[0108]

[0109] As can be seen from the test results of the above embodiments and comparative examples, the aerosol type automobile cavity anti-rust wax of Examples 1 to 4 has excellent storage stability, strong anti-sagging performance, and good neutral salt spray protection effect. Among them, the aerosol type automobile cavity anti-rust wax of Examples 1 and 2 has better performance and can still effectively protect metal after 12 days of salt spray test. As can be seen from the comparative examples, the addition of fumed silica can effectively improve the storage stability and anti-sagging performance of aerosol type automobile cavity anti-rust wax. And with the adjustment of the ratio of volatile alkane solvent and solvent oil, whether it is Comparative Example 5 without adding volatile alkane solvent, Comparative Example 6 without adding solvent oil, or Comparative Example 7 with increasing propellant content, all have different degrees of performance degradation compared to Example 1, further indicating that the component ratio of volatile alkane solvent and solvent oil in Example 1 is conducive to improving the performance of aerosol type automobile cavity anti-rust wax.

[0110] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0111] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present invention should be based on the appended claims, and the specification may be used to interpret the content of the claims.

Claims

1. An aerosol type automobile cavity anti-rust wax, characterized in that: The following raw materials are included in the following mass percentages: Calcium petroleum sulfonate 15%~25%, Wax 2%~8%, Thixotropic agent 1%~5%, Organic solvent 40%~65%, and Propellant 15%~25%; The organic solvent comprises a volatile alkane solvent and solvent oil, the boiling point of the volatile alkane solvent is less than 80°C, and the boiling point of the solvent oil is greater than or equal to 80°C; the mass ratio of the volatile alkane solvent to the solvent oil is 1:(1.5-4); in terms of the mass percentage of the aerosol-type automobile cavity anti-rust wax, the content of the volatile alkane solvent is 8%-26%, and the content of the solvent oil is 24%-52%; the volatile alkane solvent comprises one or more of n-pentane, n-hexane, isohexane and cyclopentane; the solvent oil comprises one or more of D80, D90, limonene and n-heptane; and the wax comprises microcrystalline wax.

2. The aerosol type automobile cavity anti-rust wax according to claim 1, characterized in that: The thixotropic agent includes fumed silica.

3. The aerosol type automobile cavity anti-rust wax according to claim 1, characterized in that: Calculated by mass percentage of the aerosol type automobile cavity anti-rust wax, the aerosol type automobile cavity anti-rust wax further comprises 4% to 10% of a filler; the filler comprises one or both of calcium carbonate and talc.

4. The aerosol type automobile cavity anti-rust wax according to claim 3, characterized in that: Calculated by mass percentage of the aerosol type automobile cavity anti-rust wax, the aerosol type automobile cavity anti-rust wax comprises 15% to 20% of the petroleum calcium sulfonate, 3% to 5% of the wax, 2% to 4% of the thixotropic agent, 35% to 40% of the solvent oil, 10% to 15% of the volatile alkane solvent, 15% to 20% of the propellant, and 6% to 8% of the filler.

5. A method for preparing the aerosol type automobile cavity anti-rust wax according to any one of claims 1 to 4, characterized in that: The steps include: mixing the wax, the calcium petroleum sulfonate and the solvent oil, heating and melting them to form a precursor solution; mixing the thixotropic agent and the precursor solution to form a dispersed phase; mixing the volatile alkane solvent with the dispersed phase and sealing; Fill with the propellant and mix.

6. Use of the aerosol type automobile cavity anti-rust wax according to any one of claims 1 to 4 in automobile cavity anti-rust.

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