Two-component water-based environment-friendly self-adaptive coating aerosol as well as preparation method and use method thereof

Abstract

The invention discloses a double-component water-based environment-friendly self-adaptive coating aerosol as well as a preparation method and a use method thereof. The double-component water-based environment-friendly self-adaptive coating aerosol comprises a component A, a component B and an auxiliary propellant, wherein the component A and the component B are contained in a double-cavity aerosol can; the mass ratio of the component A to the component B to the auxiliary propellant is (1-3): 1: (1-2). The component A comprises 30%-60% of water-based fluorocarbon acrylic resin, 5%-25% of functional filler dispersion, 0.1%-1% of a defoaming agent, 0.1%-2% of a flatting agent, 0.1%-1% of a catalyst, 1%-3% of a compatilizer and the balance of deionized water; and the component B comprises 30-70% of an isocyanate curing agent and the balance of a diluent. The A / B components are subpackaged through the double-cavity aerosol can, the mixing valve is opened before spraying, then the double-cavity aerosol can is shaken, the A / B components are fully mixed, then the coating is sprayed, on-site mixing is not needed, the performance problem caused by inaccurate matching is avoided, meanwhile, the construction process is simplified, the construction efficiency is improved, and the construction cost is reduced. And meanwhile, a coating formed by curing has excellent mechanical properties.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paint, in particular to a two-component water-based environment-friendly self-adaptive paint aerosol and a preparation method thereof. BACKGROUND

[0002] Two-component curing paint refers to a paint including independent main agent and curing agent, the main agent containing resin base, and the main agent and the curing agent being mixed in a specific ratio during use, so that the main agent can react with the curing agent to form a three-dimensional network structure of the cured coating. Since high-temperature curing is not required, the two-component curing paint is widely used in various fields, such as automobile repair, industrial maintenance, building field, and even aviation and military field.

[0003] In the prior art, most two-component curing paints contain a large amount of volatile organic compounds (VOC), which release harmful gases during construction, causing harm to the environment and human health. With the increasingly stringent environmental regulations, water-based paint has become a development trend in the industry due to its low VOC characteristics. For example, a two-component water-based polyurethane composite paint disclosed in Chinese Patent No. CN117377746A contains a low amount of VOC, and has a low impact on the environment during construction. However, the existing water-based paint still has deficiencies in terms of construction convenience and coating performance, especially the two-component water-based paint, which usually needs to be mixed on site, and the operation is complex and the final performance is easily affected by the mixing error.

[0004] In view of this, the present application provides a two-component water-based environment-friendly self-adaptive paint aerosol and a preparation method thereof to solve the above problems. SUMMARY

[0005] In order to overcome the deficiencies of the above-mentioned technology, the present application provides a two-component water-based environment-friendly self-adaptive paint aerosol, which does not need to be mixed with A component and B component during construction, and can be sprayed and used immediately, effectively improving the coating operation time.

[0006] A two-component water-based environment-friendly self-adaptive paint aerosol includes A component and B component stored in a double-chamber aerosol can, the double-chamber aerosol can including a first storage chamber and a second storage chamber; the A component and an auxiliary propellant are stored in the first storage chamber, and the B component is stored in the second storage chamber; the mass ratio between the A component, the B component and the auxiliary propellant is 1-3:1:1-2.

[0007] Preferably, the A component includes the following raw materials in mass percentage: 30%-60% water-based fluorocarbon acrylic resin, 5%-25% functional filler dispersion, 0.1%-1% defoaming agent, 0.1%-2% leveling agent, 0.1%-1% catalyst, 1%-3% compatibilizer, and the balance is deionized water; the B component includes the following raw materials in mass percentage: 30%-70% isocyanate curing agent, and the balance is diluent.

[0008] Preferably, the acid value of the waterborne fluorocarbon acrylic resin is 50~80 mgKOH / g.

[0009] Preferably, the functional filler dispersion includes at least one of aqueous nano-sized silica, aqueous nano-sized titanium dioxide dispersion, aqueous graphene dispersion, and aqueous nano-sized zinc oxide dispersion.

[0010] Preferably, the isocyanate curing agent includes at least one of hexamethylene diisocyanate and HDI trimer.

[0011] Preferably, the auxiliary propellant is dimethyl ether.

[0012] Preferably, the catalyst is dibutyltin dilaurate.

[0013] Preferably, the diluent is an alcohol ether or ester solvent.

[0014] Preferably, the compatibilizer is a nonionic surfactant.

[0015] To achieve the above objectives, the present invention further provides a method for preparing a two-component water-based environmentally friendly adaptive coating aerosol, comprising the following steps: Step 1: Add waterborne fluorocarbon acrylic resin, functional filler dispersion, defoamer, leveling agent, catalyst, compatibilizer, and deionized water to a disperser and stir evenly. Filter to obtain component A. Step 2: Add the isocyanate curing agent and diluent to a disperser and stir evenly to obtain component B; Step 3: Add component A to the first storage chamber of the dual-chamber aerosol can and component B to the second storage chamber. Then fill the first storage chamber with auxiliary propellant to make the overall air pressure in the first storage chamber reach 0.5~0.7MPa. Seal the chamber to obtain a two-component water-based environmentally friendly adaptive coating aerosol.

[0016] To achieve the above objectives, the present invention also provides a method for using a two-component water-based environmentally friendly adaptive coating aerosol, comprising the following steps: loading the two-component water-based environmentally friendly adaptive coating aerosol into a dual-chamber aerosol can, the dual-chamber aerosol can comprising a can body, the can body comprising a top surface and a bottom surface, a partition provided inside the can body, a spray valve assembly provided on the top surface, a first storage chamber between the top surface and the partition, and a second storage chamber between the partition and the bottom surface. A mixing valve is provided on the partition, and a retractable ejector pin is provided on the partition, the top of the ejector pin facing the mixing valve; First, component A is added to the first storage chamber, component B is added to the second storage chamber, and the auxiliary propellant is added to the first storage chamber. The chamber is then sealed to obtain a two-component water-based environmentally friendly adaptive coating aerosol product. Next, the pin of the dual-chamber aerosol can is pressed to open the mixing valve, connecting the first and second storage chambers. The dual-chamber aerosol can is then shaken to mix components A and B. Finally, the nozzle of the spray valve assembly is pressed to spray the mixed components A and B onto the surface of the object.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a dual-chamber aerosol can to dispense components A and B. Before spraying, simply open the mixing valve between the first and second storage chambers, shake the dual-chamber aerosol can to ensure that components A and B are fully mixed, and then spray the coating. No on-site mixing is required, which avoids performance problems caused by inaccurate proportions, simplifies the construction process, and improves construction efficiency.

[0018] 2. The present invention uses dimethyl ether as a propellant, which is stored in the first storage chamber. The dimethyl ether can dissolve in the diluents of components A and B. When the mixing valve is opened, the dimethyl ether in the two storage chambers can help components A and B to mix fully during the mixing process.

[0019] 3. The functional filler dispersion in component A is modified to be soluble in deionized water, just like the waterborne fluorocarbon acrylic resin, reducing the use of organic solvents in the coating. The compatibilizer improves the compatibility between raw materials and results in a more uniform and stable coating performance.

[0020] 4. The waterborne fluorocarbon acrylic resin in component A contains hydroxyl groups, which can react with the isocyanate groups of the isocyanate curing agent in component B to form urethane bonds, creating a three-dimensional cross-linked network coating. The functional filler dispersion is embedded in the coating, improving its overall hardness and abrasion resistance. Furthermore, using waterborne fluorocarbon acrylic resin as the substrate, with its high carbon-fluorine bond energy, allows for UV absorption, resulting in a coating with better weather resistance after curing. In summary, the combination of the waterborne fluorocarbon acrylic resin and the functional filler dispersion in component A enables the curing of a coating on the object surface that is adaptable to various environments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the invented dual-chamber aerosol can; The implementation, functional features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The following examples further illustrate the features and other related characteristics of the present invention to facilitate understanding by those skilled in the art: An embodiment of the present invention provides a two-component water-based environmentally friendly adaptive coating aerosol, comprising component A and component B contained in a dual-chamber aerosol can, the dual-chamber aerosol can comprising a first storage chamber and a second storage chamber; component A and auxiliary propellant are stored in the first storage chamber, and component B is stored in the second storage chamber; the mass ratio of component A, component B and auxiliary propellant is 1~3:1:1~2.

[0023] In some embodiments, component A comprises the following raw materials by mass percentage: 30%~60% waterborne fluorocarbon acrylic resin, 5%~25% functional filler dispersion, 0.1%~1% defoamer, 0.1%~2% leveling agent, 0.1%~1% catalyst, 1%~3% compatibilizer, and the balance being deionized water; component B comprises the following raw materials by mass percentage: 330%~70% isocyanate curing agent, and the balance being diluent.

[0024] In some embodiments, the acid value of the waterborne fluorocarbon acrylic resin is 50~80 mgKOH / g.

[0025] In some embodiments, the surface of the functional filler dispersion is modified by hydroxyl, carboxyl, or silane coupling agents to give it good compatibility with aqueous solvents.

[0026] In some embodiments, the functional filler dispersion includes aqueous nano-sized silica, which can improve the hardness and wear resistance of the cured coating.

[0027] In some embodiments, the functional filler dispersion includes an aqueous nano-sized titanium dioxide dispersion, which can improve the UV shielding performance of the cured coating.

[0028] In some embodiments, the functional filler dispersion includes an aqueous graphene dispersion, which can improve the antistatic and corrosion resistance properties of the coating.

[0029] In some embodiments, the functional filler dispersion includes an aqueous nanoscale zinc oxide dispersion, which can improve the UV shielding performance of the cured coating.

[0030] In some embodiments, the isocyanate curing agent includes at least one of hexamethylene diisocyanate and HDI trimer. The isocyanate curing agent can react with the hydroxyl and carboxyl groups of the waterborne fluorocarbon acrylic resin to form a three-dimensional cross-linked network coating.

[0031] In some embodiments, the auxiliary propellant is dimethyl ether, which is soluble in deionized water under pressure.

[0032] In some embodiments, the compatibilizer is a nonionic surfactant, such as polyoxyethylene ether or fatty acid ester. The compatibilizer can improve the compatibility between raw materials, not only ensuring thorough mixing of components A and B and increasing the curing speed, but also resulting in a more uniform and stable coating.

[0033] Since isocyanate curing agents react with water, in order to ensure that the isocyanate curing agents can be stored stably, in some embodiments, the diluent is an alcohol ether or ester solvent, such as propylene glycol methyl ether, dipropylene glycol methyl ether, ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, which is also miscible with liquefied dimethyl ether.

[0034] In some embodiments, the catalyst is dibutyltin dilaurate, which is soluble in deionized water and can accelerate the curing speed of the coating.

[0035] In some embodiments, the defoamer is a silicone-based defoamer, such as BYK-024, which promptly eliminates foam in the coating and ensures the smoothness of the coating.

[0036] In some embodiments, the leveling agent is an acrylate leveling agent, such as EFKA-3780.

[0037] like Figure 1 As shown, the dual-chamber aerosol can includes a can body 1, which includes a top surface 11 and a bottom surface 12. A partition 13 is provided inside the can body 1. A spray valve assembly 2 is provided on the top surface 11. A first storage chamber 14 is located between the top surface and the partition 13, and a second storage chamber 15 is located between the partition and the bottom surface. A mixing valve 17 is provided on the partition 13, and a retractable ejector pin 16 is also provided on the partition 13. The top of the ejector pin 16 faces the mixing valve 17. Pressing the ejector pin 16 forcefully pushes the mixing valve 17 upwards, connecting the first storage chamber 14 and the second storage chamber 15, allowing components A and B to mix.

[0038] The auxiliary propellant of the present invention is stored in the first storage chamber, which can generate a certain pressure on the mixing valve 17 and enhance the sealing of the mixing valve 17.

[0039] In some embodiments, the waterborne fluorocarbon acrylic resin is prepared by polymerization, and the monomers in the polymerization reaction include fluorinated acrylate monomers and hydroxyl acrylates. After the monomers are thoroughly mixed with the initiator and emulsifier, the reaction is carried out at a controlled temperature.

[0040] In some embodiments, the monomers for the polymerization reaction also include acrylic acid monomers and fluorine-free acrylate monomers.

[0041] Embodiments of the present invention also provide a method for preparing a two-component water-based environmentally friendly adaptive coating aerosol, comprising the following steps: Step 1: Add waterborne fluorocarbon acrylic resin, functional filler dispersion, defoamer, leveling agent, catalyst, compatibilizer, and deionized water to a disperser and stir evenly. Filter to obtain component A. The viscosity of component A is 4 cups, 25-30 seconds.

[0042] Step 2: Add the isocyanate curing agent and diluent to a disperser and stir evenly to obtain component B; Step 3: Add component A to the first storage chamber of the dual-chamber aerosol can and component B to the second storage chamber. Then fill the first storage chamber with auxiliary propellant to make the overall air pressure in the first storage chamber reach 0.5~0.7MPa. Seal the chamber to obtain a two-component water-based environmentally friendly adaptive coating aerosol.

[0043] Example 1 Example 1 provides a two-component water-based environmentally friendly adaptive coating aerosol, the preparation method of which includes the following steps: Step 1: Weigh out 50% waterborne fluorocarbon acrylic resin (acid value 50~80mgKOH / g), 5% waterborne nano-sized silica, 5% waterborne nano-sized titanium dioxide dispersion, 2% waterborne graphene dispersion, 0.5% defoamer BYK-024, 0.5% leveling agent EFKA-3777, 0.8% dibutyltin dilaurate, 2% compatibilizer polyoxyethylene ether, and the remainder deionized water. Add these to a disperser and stir until homogeneous. Filter to obtain component A. The viscosity of component A is 4 cups, 25~30 seconds.

[0044] Step 2: Weigh 60% HDI trimer and 40% propylene glycol methyl ether by mass percentage and add them to a disperser for uniform mixing to obtain component B.

[0045] Step 3: Add component A to the first storage chamber of the dual-chamber aerosol can, add component B to the second storage chamber, and then fill the first storage chamber with dimethyl ether; so that the air pressure in the first storage chamber reaches 0.6 MPa, thus obtaining a two-component water-based environmentally friendly adaptive coating aerosol. The mass ratio of component A: component B: dimethyl ether is 2:1:1.25.

[0046] Examples 2-3 and Comparative Example 1 were prepared by changing the raw material formulation according to Table 1 and following the preparation method of Example 1. The two-component water-based environmentally friendly adaptive coating aerosols of Examples 2-3 and Comparative Example 1 were obtained.

[0047] Table 1. Formulations of Examples 1-3 and Comparative Examples 1-3 Compared with Example 1, the two-component waterborne environmentally friendly adaptive coating aerosol of Comparative Example 2 is the same as that of Example 1 except that the waterborne fluorocarbon acrylic resin is replaced with waterborne acrylic resin.

[0048] The coating aerosols prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to the following tests.

[0049] 1. According to the usage method: Press the pin of the dual-chamber aerosol can to open the mixing valve, so that the first and second storage chambers are connected, the A / B components are mixed, shake the dual-chamber aerosol can 5~7 times, keep the nozzle 15cm away from the substrate, spray a wet film coating with a thickness of 80-100μm, and record the surface drying time and the actual drying time.

[0050] 2. After the coating has dried, conduct a cross-cut adhesion test according to GB / T9286-1988 to test its adhesion.

[0051] 3. Perform a cross-cut test according to GB / T6739-1996 to test the hardness.

[0052] IV. Using a Taber abrasion tester with a CS-10 grinding wheel, a 500g load, and the coating rotating 1000 revolutions, the mass loss of the coating before and after wear is measured. The smaller the weight loss, the better the abrasion resistance.

[0053] V. Using a QUV accelerated aging test chamber, with UVB-313 lamps to simulate ultraviolet light, the test duration is 1000 hours. The gloss retention rate is calculated as (gloss after aging ÷ initial gloss) × 100%.

[0054] Table 2 Test results of Examples 1-3 and Comparative Examples 1-3 (1) As can be seen from the data in Table 2, the coating drying speeds of Examples 1-3 and Comparative Examples 1-2 are comparable. The coating drying speed is related to both the curing speed and the evaporation of the coating solvent. The more deionized water in the coating and the higher the content of waterborne fluorocarbon acrylic resin, the slower the drying speed. In order to accelerate the drying speed, the mass of the curing catalyst should be increased with the increase of waterborne fluorocarbon acrylic resin.

[0055] (2) The adhesion of Examples 1-3 was all grade 0, and the hardness reached H-3H; the hardness of Comparative Example 1 was only B, and the adhesion was poor (grade 2). This is because nanomaterials such as water-based nano-sized silica, water-based nano-sized titanium dioxide dispersion, and water-based graphene dispersion can fill the tiny gaps between the coating and the substrate, enhancing the interfacial bonding and the overall hardness and wear resistance of the coating. At the same time, the water-based fluorocarbon acrylic resin itself also has good adhesion and can form strong chemical bonds or physical adsorption with the substrate, thereby ensuring that the coating is not easy to fall off.

[0056] Comparative Example 2 has a hardness of H and an adhesion level of 2. Compared with Comparative Example 2, Examples 1-3 show that after replacing the waterborne fluorocarbon acrylic resin with waterborne acrylic resin, although the waterborne acrylic resin also has a certain degree of adhesion, it may have a certain gap in compatibility with the substrate and bonding strength compared with the waterborne fluorocarbon acrylic resin, thus resulting in a decrease in adhesion.

[0057] (3) The gloss retention rate was 95% in Example 1, 90% in Example 2, and 97% in Example 3. This is mainly attributed to the excellent properties of the waterborne fluorocarbon acrylic resin. Fluorocarbon resin has extremely low surface energy and good chemical stability, which can resist the erosion and oxidation of ultraviolet rays, thereby maintaining the gloss of the coating. At the same time, the addition of nanomaterials may also enhance the weather resistance of the coating to a certain extent. They can absorb or scatter ultraviolet rays, reducing the damage of ultraviolet rays to the coating.

[0058] Comparative Example 1 exhibits a gloss retention rate of 60%, indicating poor weather resistance. Lacking various nanomaterials, Comparative Example 1 is prone to degradation and aging under ultraviolet light, leading to discoloration and loss of gloss. The lack of protective nanomaterials makes the coating more susceptible to UV damage, resulting in a significant decrease in weather resistance.

[0059] Comparative Example 2 had a gloss retention rate of 78%, and its weather resistance was between that of Examples 1-3 and Comparative Example 1. Replacing the waterborne fluorocarbon acrylic resin with a waterborne acrylic resin affected the coating's weather resistance. The UV resistance of the waterborne acrylic resin is inferior to that of the waterborne fluorocarbon acrylic resin; under prolonged UV exposure, the coating is more prone to aging, leading to a decrease in gloss retention.

[0060] (4) By comparing the relevant data of Examples 1-3 with Comparative Example 1, it can be found that the content of waterborne fluorocarbon acrylic resin, isocyanate curing agent, and functional filler dispersion in the coating formulation system has a significant impact on the mechanical properties of the cured coating. Specifically, when the content of these components increases, the coating performs better in terms of adhesion, hardness, abrasion resistance, and other mechanical properties. This is because the waterborne fluorocarbon acrylic resin, as a film-forming substance, provides the coating with basic strength and toughness; the isocyanate curing agent can react with the active groups in the resin to form a cross-linked structure, further enhancing the hardness and chemical resistance of the coating; while the functional filler dispersion, such as waterborne nano-sized silica and waterborne nano-sized titanium dioxide dispersion, is uniformly dispersed in the coating, playing a role in strengthening and toughening, effectively improving the abrasion resistance and impact resistance of the coating.

[0061] However, in practical applications, it is necessary to comprehensively consider the crucial factor of ensuring smooth spraying of the coating from the dual-chamber aerosol can. The viscosity of component A is an important indicator affecting the coating's spraying performance. Only when the viscosity of component A is within a suitable range can the coating be sprayed evenly and smoothly from the aerosol can under air pressure. Therefore, the content of waterborne fluorocarbon acrylic resin is not necessarily better the higher it is. If its content is too high, it will lead to excessive viscosity of component A, thereby affecting the coating's spraying effect and even causing problems such as nozzle clogging.

[0062] Furthermore, the dispersion of waterborne fluorocarbon acrylic resin and functional fillers is also crucial. If the content of these two components is too high, while the solvent content is relatively low, they will not be able to disperse sufficiently in the coating system, leading to agglomeration. This agglomeration not only reduces the quality stability of the coating but also affects the uniformity and density of the coating, thus adversely impacting its mechanical properties. Therefore, during the coating formulation design process, it is necessary to carefully adjust the content of each component to achieve the optimal balance between the coating's mechanical properties, sprayability, and dispersion stability.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A two-component water-based environmentally friendly adaptive coating aerosol, characterized in that, It includes component A, component B and auxiliary propellant contained in a dual-chamber aerosol can, which includes a first storage chamber and a second storage chamber; The A component and auxiliary propellant are stored in the first storage chamber, and the B component is stored in the second storage chamber; The mass ratio of component A, component B and auxiliary propellant is 1~3:1:1~2.

2. The two-component water-based environmentally friendly adaptive coating aerosol according to claim 1, characterized in that, Component A comprises the following raw materials by mass percentage: 30%~60% waterborne fluorocarbon acrylic resin, 5%~25% functional filler dispersion, 0.1%~1% defoamer, 0.1%~2% leveling agent, 0.1%~1% catalyst, 1%~3% compatibilizer, and the balance being deionized water; Component B comprises the following raw materials by mass percentage: 30%~70% isocyanate curing agent, and the balance being diluent.

3. The two-component water-based environmentally friendly adaptive coating aerosol according to claim 1, characterized in that, The acid value of the waterborne fluorocarbon acrylic resin is 50~80 mgKOH / g.

4. The two-component water-based environmentally friendly adaptive coating aerosol according to claim 1, characterized in that, The functional filler dispersion includes at least one of the following: aqueous nano-sized silica, aqueous nano-sized titanium dioxide dispersion, aqueous graphene dispersion, and aqueous nano-sized zinc oxide dispersion.

5. The two-component water-based environmentally friendly adaptive coating aerosol according to claim 1, characterized in that, The auxiliary propellant is dimethyl ether.

6. The two-component water-based environmentally friendly adaptive coating aerosol according to claim 1, characterized in that, The catalyst is dibutyltin dilaurate.

7. The two-component water-based environmentally friendly adaptive coating aerosol according to claim 1, characterized in that, The diluent is an alcohol ether or ester solvent.

8. The two-component water-based environmentally friendly adaptive coating aerosol according to claim 1, characterized in that, The compatibilizer is a nonionic surfactant.

9. A method for preparing a two-component water-based environmentally friendly adaptive coating aerosol as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Step 1: Add water-based fluorocarbon acrylic resin, functional filler dispersion, defoamer, leveling agent, catalyst, compatibilizer, and deionized water to a disperser and stir evenly. Filter to obtain component A. Step 2: Add the isocyanate curing agent and diluent to a disperser and stir evenly to obtain component B; Step 3: Add component A to the first storage chamber of the dual-chamber aerosol can, add component B to the second storage chamber, and then fill the first storage chamber with auxiliary propellant; This allows the overall air pressure inside the first storage chamber to reach 0.5~0.7MPa, which is then sealed to obtain a two-component water-based environmentally friendly adaptive coating aerosol.

10. A method for using a two-component water-based environmentally friendly adaptive coating aerosol, comprising the following steps: The two-component water-based environmentally friendly adaptive coating aerosol as described in claims 1-8 is loaded into a dual-chamber aerosol can. The dual-chamber aerosol can includes a can body, the can body includes a top surface and a bottom surface, a partition is provided inside the can body, a spray valve assembly is provided on the top surface, a first storage chamber is located between the top surface and the partition, and a second storage chamber is located between the partition and the bottom surface. A mixing valve is provided on the partition, and a retractable ejector pin is provided on the partition, with the top of the ejector pin facing the mixing valve. First, component A is added to the first storage chamber, component B is added to the second storage chamber, and the auxiliary propellant is added to the first storage chamber. The chamber is then sealed to obtain a two-component water-based environmentally friendly adaptive coating aerosol product. Next, the pin of the dual-chamber aerosol can is pressed to open the mixing valve, connecting the first and second storage chambers. The dual-chamber aerosol can is then shaken to mix components A and B. Finally, the nozzle of the spray valve assembly is pressed to spray the mixed components A and B onto the surface of the object.

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