Aerosol type automobile cavity rust-proof wax as well as preparation method and application thereof

Abstract

The invention relates to aerosol type automobile cavity rust-proof wax as well as a preparation method and application thereof. The aerosol type automobile cavity antirust wax comprises the following components in percentage by mass: 15%-25% of petroleum calcium sulfonate, 2%-8% of wax, 1%-5% of a thixotropic agent, 40%-65% of an organic solvent and 15%-25% of a propellant, wherein the organic solvent comprises a volatile alkane solvent of which the boiling point is less than 80 DEG C and solvent oil of which the boiling point is greater than or equal to 80 DEG C. According to the aerosol type automobile cavity rust-proof wax, through the combination of the solvent oil, the volatile alkane solvent and the propellant with specific components, the aerosol type automobile cavity rust-proof wax which is good in storage stability and free of coagulation can be obtained, the aerosol type automobile cavity rust-proof wax can still be smoothly and uniformly sprayed after being stored for a long time, and the aerosol type automobile cavity rust-proof wax is convenient to use and stable in effect. Meanwhile, after spraying, along with volatilization of the volatile alkane solvent and the propellant, the content of other components in the system is increased, so that the anti-sagging property of the anti-rust film is enhanced, and the formed film is uniform and fine.

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] The car cavity is the weak point of the whole vehicle's anti-corrosion. At present, car cavity anti-rust wax is usually used to solve the corrosion problem of the car cavity. However, the cavity anti-rust wax on the market is usually in the form of barreled liquid, and special internal cavity wax injection methods are required during construction, which is difficult for consumers to operate and not conducive to self-maintenance. In addition, since the wax injection port of the car cavity is generally small, it is difficult for operators to observe the internal coating during construction. Therefore, traditional wax injection usually adds excessive wax liquid to avoid the existence of coating blind spots, and a large amount of wax liquid will flow downward, resulting in uneven film formation in the cavity. Summary of the invention

[0003] Based on this, it is necessary to provide an aerosol type automobile cavity anti-rust wax and a preparation method and application thereof, so as 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, measured by mass percentage 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 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, and forming 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 in 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] The present application can obtain an aerosol-type automobile cavity anti-rust wax with good storage stability and no condensation through the combination of solvent oil, volatile alkane solvent and propellant of specific components. It can still be sprayed smoothly and evenly after long-term storage, is easy to use and has stable effect. At the same time, after spraying, as the volatile alkane solvent and the propellant evaporate, the content of other components of the system will increase, so that the anti-sagging property of the anti-rust film is enhanced, and the film is formed evenly and finely. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In this application, "at least one" means more than one, such as one, two and 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 those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] When a numerical range is disclosed herein, the above range is considered to be 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 features or characteristics, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all subranges included 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 also 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] The temperature parameters in this application, unless otherwise specified, are allowed to be either constant temperature treatment or to vary within a certain temperature range. It should be understood that the constant temperature treatment allows the temperature to fluctuate within the accuracy range controlled by the instrument. Fluctuations within the range of ±5°C, ±4°C, ±3°C, ±2°C, and ±1°C are allowed.

[0034] Metal corrosion is one of the main reasons for the loss of metal materials, which will have a great impact on the safety of metal substrates. In the design process of automobiles, cathodic electrophoretic coating is usually used to improve the corrosion resistance of the whole vehicle. However, there are also some special cavity structures in the structure of the car, such as the door edge, lower beam, pillar and other places, which are usually set with cavities to improve the structural stability. In these cavity structures, the electrophoretic effect is weakened due to the shielding effect of the metal, which makes the thickness of the electrophoretic coating thinner, generally only reaching 30%~50% of the normal coating thickness. Even in the gaps, interlayers and gaps formed by welding, there is almost no coating, only 2μm~4μm phosphate film. Moreover, due to the poor air circulation in the cavity, once water enters, the cavity will be in a humid state for a long time. Combining the above factors, the cavity of the car is very prone to corrosion, and even serious corrosion penetration occurs, which endangers 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 car cavity anti-rust wax still has the following problems: 1. Inconvenient construction. Special inner cavity wax injection means are required during construction, and additional guide air pipes are required to assist in wax injection, which makes it difficult for consumers to inject wax by themselves. 2. Uneven film formation. The wax injection port of the car cavity is generally small, and it is difficult to observe the internal coating during construction. In order to ensure complete coating, it is usually necessary to over-fill the wax liquid, which not only causes a waste of anti-rust wax, but also the excess anti-rust wax easily gathers at the bottom of the cavity, which has an adverse effect on the curing process.

[0037] In view of the above problems, an embodiment of the present application provides an aerosol type automobile anti-rust cavity wax. The aerosol type automobile anti-rust cavity wax has the characteristics of convenient construction and uniform spraying, and can be widely used in industrial production and daily use by consumers, and can also be widely used in later 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 oil is less than or equal to 300°C.

[0046] In some of the embodiments, the mass percentage of wax in the aerosol type 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 of the embodiments, the mass percentage of calcium petroleum sulfonate in the aerosol type 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 of the embodiments, the mass percentage of the thixotropic agent in the aerosol type 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 of the embodiments, the mass percentage of the organic solvent in the aerosol type 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 the present application, the aerosol type automobile cavity anti-rust wax uses petroleum calcium sulfonate and wax as the main anti-rust ingredients. Metal surfaces are prone to rust and corrosion when exposed to air, moisture and some corrosive media. After the petroleum calcium sulfonate is coated on the metal surface, the petroleum calcium sulfonate can be adsorbed on the metal surface and form a layer of corrosion protection film, which inhibits the corrosion process of the metal by isolating the external corrosive medium. At the same time, the wax also has good film-forming properties, and the wax film has the characteristics of being continuous and dense. The compound use of petroleum calcium sulfonate and wax can form a corrosion protection film on the metal surface that has both strength and corrosion protection effect.

[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 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 corrosion resistance of the wax film. According to experimental tests, when spraying, the components of the aerosol type automobile cavity anti-rust wax will contact 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 through the deployment of 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 to form 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, resulting in a decrease in the viscosity of the system and 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 automotive cavity anti-rust wax can improve the shortcoming of the aerosol-type automotive 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% of filler, as a percentage of the 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 talcum powder. Adding fillers can improve the vibration reduction effect of the coating and reduce the noise conduction efficiency of the cavity structure.

[0058] In some of the embodiments, 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.

[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 can be 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, the filler and the 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 r / min to 1500 r / min for 5 min to 20 min 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 type automobile cavity anti-rust wax in automobile cavity anti-rust.

[0073] In some embodiments, a container containing the above-mentioned aerosol type automobile cavity anti-rust wax is equipped with an adapted spray assembly. The part to be rust-proofed is cleaned, and the spray head is pressed at a distance of 10 cm to 20 cm from the surface of the part to be rust-proofed, and the spray is continuously sprayed for 2 seconds to 10 seconds, and then it is left to dry naturally.

[0074] It is understandable that the aerosol type car cavity anti-rust wax can be prepared directly in the aerosol can. At this time, just clean the part that needs to be rust-proofed, press the nozzle at a distance of 10cm~20cm from the surface of the rust-proof part, hold for 2s~10s, and wait for natural drying.

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

[0076] In the following specific embodiments 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] In terms of mass percentage, the raw materials of the aerosol type automobile cavity anti-rust wax of this embodiment are: petroleum calcium 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%; filler is calcium carbonate and talcum powder, with a content of calcium carbonate of 3% and a content of talcum powder of 3%; propellant is propane and butane, with propane being 6% and butane being 14%.

[0079] The preparation method of the aerosol type automobile cavity anti-rust wax of this embodiment is as follows: mix microcrystalline wax, petroleum calcium sulfonate and solvent oil D80, heat the system to 80°C, keep warm for 10 minutes, and form a precursor solution. Cool the system by 60°C, mix fumed silica, calcium carbonate, talcum powder and precursor solution, stir at 1200r / min for 20 minutes to form a dispersed phase. Mix isohexane with the dispersed phase, stir at 1200r / min for 10 minutes, and seal in a container with an air jet component. Fill with propane and butane to obtain an aerosol type automobile 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, and the content 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 talcum powder 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 content of D80 solvent oil is 25%; the content of propellant is 40%, of which propane is 12% and butane is 28%,

[0102] Test Case

[0103] Experimental steps: The aerosol type automobile cavity anti-rust wax of each embodiment and comparative example was placed in a 50°C oven for storage. It was taken out every 10 days, placed at room temperature, and the appearance of the aerosol type automobile cavity anti-rust wax was observed, and the leveling test and neutral salt spray test were performed. The test lasted for 90 days.

[0104] The experimental steps of the coating sag test are as follows: take a 20cm*50cm flat tinplate sheet and place it vertically on the wall, spray 3g of liquid on the tinplate sheet according to the normal use method, and collect the dripping liquid with an aluminum foil box under the tinplate. After the coating is dry, weigh the mass of the dripping liquid collected by the aluminum foil box and judge the sag performance. Less than 1g is excellent, 1g~2g is medium, and more than 2g is poor. At the same time, check the flatness of the coating after drying.

[0105] The experimental steps of the neutral salt spray test are as follows: the test is carried out according to the test method of GB / T10125-2012 for a total of 12 days, and the surface condition of the test sample is evaluated every day. If there is no rust spot by naked eye, it meets the anti-corrosion standard. The industry generally believes that resistance to neutral salt spray for 1 day is equivalent to having corrosion resistance without obvious corrosion at room temperature for 1 year.

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

[0107] Table 1

[0108]

[0109] From the test results of the above embodiments and comparative examples, it can be seen that the aerosol type automobile cavity anti-rust wax of embodiments 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 embodiments 1 and 2 has better performance and can still effectively protect metal after 12 days of salt spray test. It can be seen from the comparative example that 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 increased propellant content, compared with embodiment 1, there are different degrees of performance decline, which further shows that the component ratio of volatile alkane solvent and solvent oil in embodiment 1 is conducive to improving the performance of aerosol type automobile cavity anti-rust wax.

[0110] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims, and the description may be used to interpret the content of the claims.

Claims

1. An aerosol type automobile cavity anti-rust wax, characterized in that: The raw materials include 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 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.

2. The aerosol type automobile cavity anti-rust wax according to claim 1, characterized in that: 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%.

3. The aerosol type automobile cavity anti-rust wax according to claim 2, characterized in that: The volatile alkane solvent includes one or more of n-pentane, n-hexane, isohexane and cyclopentane.

4. The aerosol type automobile cavity anti-rust wax according to claim 2, characterized in that: The solvent oil includes one or more of D80, D90, limonene and n-heptane.

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

6. The aerosol type automobile cavity anti-rust wax according to claim 1, characterized in that: The wax includes microcrystalline wax.

7. 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 also includes 4% to 10% of filler; the filler includes one or two of calcium carbonate and talcum powder.

8. The aerosol type automobile cavity anti-rust wax according to claim 7, 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.

9. A method for preparing the aerosol type automobile cavity anti-rust wax according to any one of claims 1 to 8, characterized in that: The steps include: Mixing the wax, the calcium petroleum sulfonate and the solvent oil, heating and melting, and forming 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 in the propellant and mix.

10. Use of the aerosol type automobile cavity anti-rust wax according to any one of claims 1 to 8 in automobile cavity anti-rust.

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