Super-scratch-resistant quick-drying passenger car cabin paint and preparation method thereof

Abstract

The invention relates to super-scratch-resistant quick-drying passenger car cabin paint and a preparation method thereof. The super-scratch-resistant quick-drying passenger car cabin paint comprises a component A and a component B, the component A is prepared from the following raw materials in parts by mass: 40 to 50 parts of epoxy resin, 30 to 45 parts of pigment filler, 2.0 to 4.0 parts of scratch-resistant additive, 0.2 to 0.3 part of flatting agent and 10 to 25 parts of first solvent; and the component B comprises the following raw materials in parts by mass: 40-50 parts of an amine curing agent, 5-10 parts of a drier and 45-50 parts of a second solvent. On one hand, a solution is provided for the super scratch resistance of the paint surface of the passenger car cabin. Meanwhile, the quick-drying property of the coating also provides a solution for improving the production rhythm of passenger car body coating and reducing energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and particularly relates to a super scratch-resistant and fast-drying bus cabin paint and a preparation method thereof. Background Art

[0002] With the rapid development of the economy, the rapid improvement of people's material living standards, and the increasing demand for tourism consumption, the tourism bus market has grown rapidly. Bus manufacturers are under increasing pressure to ship, and they put forward diverse, fast, efficient, and high-quality spraying requirements to coating enterprises in terms of production rhythm.

[0003] During the production process of bus manufacturers, the welded body enters the assembly line, goes through electrophoresis, painting, and general assembly, and the finished vehicle comes off the line. When painting the inner cabin, on the one hand, there is a requirement for a fast rhythm, and it can dry quickly by itself without baking and enter the next process. On the other hand, the cabin paint surface faces friction from the luggage wheels during use, and the paint surface is required to have extremely strong scratch resistance. However, the current bus cabin paints cannot meet the above requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a super scratch-resistant and fast-drying bus cabin paint and a preparation method thereof to overcome at least one of the defects existing in the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] One of the purposes of the present invention is a super scratch-resistant and fast-drying bus cabin paint, which comprises component A and component B;

[0007] Component A comprises the following raw materials in parts by mass: 40 - 50 parts of epoxy resin, 30 - 45 parts of pigment and filler, 2.0 - 4.0 parts of scratch-resistant auxiliary agent, 0.2 - 0.3 parts of leveling agent, and 10 - 25 parts of the first solvent;

[0008] Component B comprises the following raw materials in parts by mass: 40 - 50 parts of amine curing agent, 5 - 10 parts of drier, and 45 - 50 parts of the second solvent.

[0009] Furthermore, the epoxy resin is E-20 bisphenol A epoxy resin with an epoxy value of 0.18 - 0.22. Further preferably, the epoxy resin includes commercially available Yuanbang YPE-011X75. Among them, under the action of the curing agent, the E-20 bisphenol A epoxy resin can undergo a crosslinking curing reaction to form a polymer with a three-dimensional network structure. In this process, the epoxy groups in the epoxy resin molecules chemically react with the active groups in the curing agent to form crosslinking points, and these crosslinking points gradually connect together to form a tight three-dimensional network structure. This three-dimensional network structure endows the coating with good mechanical properties such as hardness and impact resistance, enabling the coating to withstand various external forces and not be easily damaged; in addition, due to the very tight three-dimensional network structure formed after curing, the coating has excellent denseness. This denseness can effectively block the penetration and erosion of moisture, oxygen, chemical substances, etc. in the external environment, thereby protecting the surface of the coated object from the influence of the external environment and improving the corrosion resistance and durability of the coated object.

[0010] Furthermore, the pigment extender includes one or more of rutile titanium dioxide, carbon black, and precipitated barium sulfate. Among them, the pigment extender can be selected from commercially available general industrial products.

[0011] Furthermore, the scratch-resistant additive is polytetrafluoroethylene wax powder with a melting point of 120 - 128 °C. Further preferably, the scratch-resistant additive includes commercially available Nanjing Tianshi polytetrafluoroethylene wax powder PEW-677F. Specifically, polytetrafluoroethylene wax powder has an extremely low coefficient of friction and excellent wear resistance. After adding this wax powder to coatings and inks, its particles will be evenly dispersed in the coating or film. When the coating is rubbed, the polytetrafluoroethylene wax powder particles can play a lubricating role, reducing the frictional resistance, thereby significantly improving the wear resistance of the coating. In addition, due to the moderate hardness and good flexibility of polytetrafluoroethylene wax powder, when the surface of the coating or ink layer is scratched by external forces, the polytetrafluoroethylene wax powder particles can form a protective film at the scratched area, filling and repairing the scratched part, thereby effectively reducing the visibility of the scratch and enhancing the scratch resistance of the coating.

[0012] Furthermore, the leveling agent is low molecular weight polysiloxane. Further preferably, the leveling agent is commercially available BYK306 from BYK-Chemie.

[0013] Furthermore, the compositions of the first solvent and the second solvent are the same, both being S-100# solvent oil and n-butanol with a mass ratio of (3 - 5):1. Further preferably, the weight ratio of S-100# solvent oil to butanol is 4:1.

[0014] Furthermore, the amine curing agent is polyamide resin. Further preferably, the polyamide resin includes commercially available 650 from Sanmu Chemical Industry.

[0015] Furthermore, the drier is an epoxy active monomer. More preferably, the epoxy active monomer includes commercially available Sumiki Chemical DMP30. Among them, in the epoxy coating system, DMP30 can not only significantly accelerate the cross-linking reaction rate between epoxy resin and curing agent; DMP30 can also promote rapid cross-linking reaction, contributing to the formation of a denser three-dimensional network structure coating. This dense structure enhances the intermolecular force of the coating, thus significantly improving the hardness of the coating.

[0016] The second object of the present invention lies in a preparation method of the super scratch-resistant and quick-drying bus cabin paint as described above, including the following steps:

[0017] S1. Add epoxy resin into a container, and sequentially add a scratch-resistant aid, a leveling agent, a pigment filler, and a first solvent while stirring, keep stirring at a constant speed until uniform, and grind until the dispersion fineness is less than 25 μm to obtain component A;

[0018] S2. Add polyamide resin, a drier, and a second solvent into a container, and stir evenly to obtain component B.

[0019] Furthermore, in S1, the stirring speed is 1500 - 2000 rpm, and keep stirring at a constant speed for at least 30 min; in S2, the stirring speed is 500 - 800 rpm, and the stirring time is 5 - 10 min.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] (1) The present invention provides a super scratch-resistant and quick-drying bus cabin paint, which on the one hand provides a solution for the super scratch-resistant performance of the bus cabin paint surface. At the same time, its quick-drying property also provides a solution for improving the production rhythm of bus body painting and reducing energy consumption.

[0022] (2) When the prior art solves the problems of scratch resistance and quick drying of bus cabin paint, it mostly adopts the baking method, which not only increases the energy consumption of production equipment, but also has to solve the problems of the huge operating space and site of the bus body. And the scratch resistance of this application is achieved by adding polytetrafluoroethylene wax and using an epoxy active monomer as a drier, which greatly improves the reaction speed and can achieve the effect of curing during the transfer process without baking for a short time;

[0023] (3) The product of the present invention has the characteristics of quick drying and super scratch resistance. During the bus body paint coating process, it can significantly reduce the curing energy consumption while greatly improving the production efficiency. Specific Embodiments

[0024] The following is a detailed description of the embodiments of the present invention. These embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0025] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Those not specifying specific conditions shall be carried out under conventional conditions or conditions recommended by the manufacturer. Those reagents or instruments not indicating the manufacturer can be obtained as conventional products through commercial purchase.

[0026] In the ranges disclosed in the present invention, the endpoints and any values are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed in the present invention.

[0027] During the production process of bus manufacturers, the welded body enters the assembly line, undergoes electrophoresis, painting, and final assembly, and the finished vehicle is produced when it comes off the line. When painting the inner cabin, on the one hand, there is a requirement for a fast rhythm, and it can dry quickly by itself without baking and enter the next process. On the other hand, the cabin paint surface faces the friction of the luggage wheels during use, and it is required that the paint surface has extremely strong scratch resistance, while the current bus cabin paint cannot meet the above requirements. For this reason, the present invention proposes a super scratch-resistant fast-drying bus cabin paint, which includes component A and component B;

[0028] Component A includes the following raw materials in parts by mass: 40 - 50 parts of epoxy resin, 30 - 45 parts of pigment and filler, 2.0 - 4.0 parts of scratch-resistant additive, 0.2 - 0.3 parts of leveling agent, and 10 - 25 parts of the first solvent;

[0029] Component B includes the following raw materials in parts by mass: 40 - 50 parts of amine curing agent, 5 - 10 parts of drying accelerator, and 45 - 50 parts of the second solvent.

[0030] In some embodiments of the present invention, the epoxy resin is E-20 bisphenol A epoxy resin with an epoxy value of 0.18 - 0.22. Further preferably, the epoxy resin includes commercially available Yuanbang YPE-011X75. Among them, under the action of a curing agent, the E-20 bisphenol A epoxy resin can undergo a crosslinking curing reaction to form a polymer with a three-dimensional network structure. In this process, the epoxy groups in the epoxy resin molecules chemically react with the active groups in the curing agent to form crosslinking points, and these crosslinking points are gradually connected together to form a tight three-dimensional network structure. This three-dimensional network structure endows the coating with good mechanical properties such as hardness, abrasion resistance, impact resistance, etc., enabling the coating to withstand various external forces and not be easily damaged; in addition, due to the very tight three-dimensional network structure formed after curing, the coating has excellent denseness. This denseness can effectively block the penetration and erosion of moisture, oxygen, chemical substances, etc. in the external environment, thereby protecting the surface of the coated object from the influence of the external environment and improving the corrosion resistance and durability of the coated object.

[0031] In some embodiments of the present invention, the pigment extender includes one or more of rutile titanium dioxide, carbon black, and precipitated barium sulfate. Among them, the pigment extender can be selected from commercially available general industrial products.

[0032] In some embodiments of the present invention, the scratch resistance aid is polytetrafluoroethylene wax powder with a melting point of 120 - 128 °C. Further preferably, the scratch resistance aid includes commercially available Nanjing Tianshi polytetrafluoroethylene wax powder PEW-677F. Specifically, polytetrafluoroethylene wax powder has an extremely low coefficient of friction and excellent abrasion resistance. After adding this wax powder to coatings and inks, its particles will be evenly dispersed in the coating or the coating layer. When the coating is rubbed, the polytetrafluoroethylene wax powder particles can play a lubricating role, reducing the frictional resistance, thereby significantly improving the abrasion resistance of the coating. In addition, due to the moderate hardness and good flexibility of polytetrafluoroethylene wax powder, when the surface of the coating or ink layer is scratched by an external force, the polytetrafluoroethylene wax powder particles can form a protective film at the scratched area, filling and repairing the scratched part, thereby effectively reducing the visibility of the scratch and enhancing the scratch resistance of the coating.

[0033] In some embodiments of the present invention, the leveling agent is low molecular weight polysiloxane. Further preferably, the leveling agent is commercially available BYK306 from BYK Chemie.

[0034] In some embodiments of the present invention, the compositions of the first solvent and the second solvent are the same, both being S-100# solvent oil and n-butanol with a mass ratio of (3 - 5):1. Further preferably, the weight ratio of S-100# solvent oil to butanol is 4:1.

[0035] In some embodiments of the present invention, the amine curing agent is a polyamide resin. Further preferably, the polyamide resin includes commercially available Sumiki Chemical 650.

[0036] In some embodiments of the present invention, the drier is an epoxy active monomer. Further preferably, the epoxy active monomer includes commercially available Sumiki Chemical DMP30. Among them, in the epoxy coating system, DMP30 can not only significantly accelerate the cross-linking reaction rate between epoxy resin and curing agent; DMP30 can also promote rapid cross-linking reaction, contributing to the formation of a denser three-dimensional network structure coating. This dense structure enhances the intermolecular force of the coating, thereby significantly improving the hardness of the coating.

[0037] The present invention also provides a preparation method of the above-mentioned super scratch-resistant and quick-drying bus cabin paint, including the following steps:

[0038] S1. Add epoxy resin to a container, and while stirring, sequentially add scratch-resistant aids, leveling agents, pigments and fillers, and the first solvent. Keep stirring at a constant speed until uniform, and grind until the dispersion fineness is less than 25 μm to obtain Component A.

[0039] S2. Add polyamide resin, drier, and the second solvent to a container, and stir evenly to obtain Component B.

[0040] Among them, in S1, the stirring speed is 1500 - 2000 rpm, and keep stirring at a constant speed for at least 30 min; in S2, the stirring speed is 500 - 800 rpm, and the stirring time is 5 - 10 min.

[0041] The solvents mentioned in the following examples are all S-100# solvent oil and n-butanol with a mass ratio of 4:1.

[0042] Example 1

[0043] This example provides a super scratch-resistant and quick-drying bus cabin paint.

[0044] Component A weighs the following components in parts by mass:

[0045] Serial number Raw material Parts by mass 1 Epoxy resin YPE-011X75 45 2 Rutile titanium dioxide 5 3 Precipitated barium sulfate 30 4 Carbon black 2 5 Polytetrafluoroethylene wax powder PEW-677F 3 6 Leveling agent BYK306 0.2 7 Solvent 14.8

[0046] Component B weighs the following components in parts by mass:

[0047] Serial number Raw material Parts by mass 1 Polyamide resin 650 45 2 Epoxy active monomer DMP30 5 3 Solvent 50

[0048] Preparation steps:

[0049] Component A

[0050] (1) Add 45 parts of epoxy resin, and successively add 5 parts of rutile titanium dioxide, 30 parts of precipitated barium sulfate, 2 parts of carbon black, 3 parts of polytetrafluoroethylene wax powder, 0.2 part of leveling agent, and 14.8 parts of solvent under the mixer speed of 1500 - 2000 rpm. Keep the speed and stir for 30 minutes for dispersion.

[0051] (2) Feed into a sand mill, grind and disperse until the fineness is less than 25 μm and then discharge to obtain Component A.

[0052] Component B

[0053] (1) Add 45 parts of polyamide, 5 parts of epoxy active monomer resin, and 50 parts of solvent

[0054] (2) Stir at a mixer speed of 500 - 800 rpm for 5 - 10 minutes to obtain Component B.

[0055] Plate preparation and testing: Dilute according to the mass ratio (Component A: Component B: Solvent = 5:1:2), spray 40 - 60 μm on the electrophoresis plate, and after air-drying at room temperature for 2 hours, the test results are as follows:

[0056]

[0057]

[0058] Except for item 3, the rest are tested after air-drying for 168 hours.

[0059] Example 2

[0060] This example provides a super scratch-resistant and fast-drying paint for bus cabins.

[0061] Component A weighs the following parts by mass of components:

[0062] Serial number Raw material Parts by mass 1 Epoxy resin YPE-011X75 50 2 Rutile titanium dioxide 5 3 Precipitated barium sulfate 27.5 4 Carbon black 2 5 Polytetrafluoroethylene wax powder PEW-677F 3 6 Leveling agent BYK306 0.2 7 Solvent 12.3

[0063] Component B weighs the following parts by mass of components:

[0064] Serial number Raw material Parts by mass 1 Polyamide resin 650 50 2 Epoxy active monomer DMP30 5 3 Solvent 45

[0065] Preparation steps:

[0066] Component A

[0067] (1) Add 50 parts of epoxy resin, and successively add 5 parts of rutile titanium dioxide, 27.5 parts of precipitated barium sulfate, 2 parts of carbon black, 3 parts of polytetrafluoroethylene wax powder, 0.2 part of leveling agent, and 14.6 parts of solvent under the mixer speed of 1500 - 2000 rpm. Keep the speed and stir for 30 minutes for dispersion.

[0068] (2) Enter the sand mill, grind and disperse until the fineness is less than 25 μm, then discharge to obtain Component A.

[0069] Component B

[0070] (1) Add 50 parts of polyamide, 5 parts of epoxy active monomer resin, and 45 parts of solvent

[0071] (2) Stir at a mixer speed of 500 - 800 rpm for -105 minutes to obtain Component B.

[0072] Plate preparation and testing: Dilute according to the mass ratio (Component A: Component B: Solvent = 5:1:3), spray 40 - 60 μm on the electrophoresis plate, and after air-drying at room temperature for 2 hours, the test results are as follows:

[0073]

[0074] Except for item 3, the rest are tested after air-drying for 168 hours.

[0075] Example 3

[0076] This example provides a super scratch-resistant and fast-drying paint for bus cabins.

[0077] Component A weighs the following parts by mass of components:

[0078] Serial number Raw material Parts by mass 1 Epoxy resin YPE-011X75 40 2 Rutile titanium dioxide 5 3 Precipitated barium sulfate 35 4 Carbon black 2 5 Polytetrafluoroethylene wax powder PEW-677F 3 6 Leveling agent BYK306 0.2 7 Solvent 14.8

[0079] Component B weighs the following parts by mass of components:

[0080] Serial number Raw material Parts by mass 1 Polyamide resin 650 40 2 Epoxy active monomer DMP30 5 3 Solvent 55

[0081] Preparation steps:

[0082] Component A

[0083] (1) Add 40 parts of epoxy resin, and successively add 5 parts of rutile titanium dioxide, 35 parts of precipitated barium sulfate, 2 parts of carbon black, 3 parts of polytetrafluoroethylene wax powder, 0.2 part of leveling agent, and 14.8 parts of solvent at a mixer speed of 1500 - 2000 rpm. Maintain the speed and stir and disperse for 30 minutes.

[0084] (2) Enter the sand mill, grind and disperse until the fineness is less than 25 μm, then discharge to obtain Component A.

[0085] Component B

[0086] (1) Add 40 parts of polyamide, 5 parts of epoxy active monomer resin, and 55 parts of solvent

[0087] (2) Stir at a mixer speed of 500 - 800 rpm for 5 - 10 minutes to obtain Component B.

[0088] Plate-making test: Dilute according to the mass ratio (Component A: Component B: Solvent = 5:1:1.5), spray 40 - 60 μm on the electrophoresis plate, and air-dry at room temperature for 2 hours. The test results are as follows:

[0089]

[0090] Except for item 3, the rest are tested after air-drying for 168 hours.

[0091] Example 4

[0092] This example provides a super scratch-resistant and fast-drying bus cabin paint, and the preparation method of this bus cabin paint is the same as that of Example 1.

[0093] Component A weighs the following components by mass:

[0094] Serial number Raw material Parts by mass 1 Epoxy resin YPE-011X75 40 2 Rutile titanium dioxide 5 3 Precipitated barium sulfate 30 4 Carbon black 2 5 Polytetrafluoroethylene wax powder PEW-677F 2 6 Leveling agent BYK306 0.2 7 Solvent 20.8

[0095] Component B weighs the following components by mass:

[0096] Serial number Raw material Parts by mass 1 Polyamide resin 650 50 2 Epoxy active monomer DMP30 5 3 Solvent 45

[0097] Example 5

[0098] This example provides a super scratch-resistant and fast-drying bus cabin paint, and the preparation method of this bus cabin paint is the same as that of Example 1.

[0099] Component A weighs the following components by mass:

[0100] Serial number Raw material Parts by mass 1 Epoxy resin YPE-011X75 50 2 Rutile titanium dioxide 5 3 Precipitated barium sulfate 25 4 Carbon black 2 5 Polytetrafluoroethylene wax powder PEW-677F 4 6 Leveling agent BYK306 0.3 7 Solvent 13.7

[0101] Component B weighs the following components by mass:

[0102]

[0103]

[0104] Comparative example 1

[0105] This comparative example provides a bus cabin paint:

[0106] Component A weighs the following components by mass:

[0107] Serial number Raw material Parts by mass 1 Epoxy resin YPE-011X75 45 2 Rutile titanium dioxide 5 3 Precipitated barium sulfate 30 4 Carbon black 2 5 Leveling agent BYK306 0.2 6 Solvent 17.8

[0108] Component B weighs the following components by mass:

[0109] Serial number Raw material Parts by mass 1 Polyamide resin 650 45 2 Solvent 55

[0110] Preparation steps:

[0111] Component A

[0112] (1) Add 45 parts of epoxy resin, and successively add 5 parts of rutile titanium dioxide, 30 parts of precipitated barium sulfate, 2 parts of carbon black, 0.2 part of leveling agent, and 17.8 parts of solvent under the mixer speed of 1500 - 2000 rpm. Keep the speed and stir for 30 minutes for dispersion.

[0113] (2) Feed into a sand mill, grind and disperse until the fineness is less than 25 μm and then discharge to obtain Component A.

[0114] Component B

[0115] (1) Add 45 parts of polyamide and 55 parts of solvent

[0116] (2) Stir at the mixer speed of 500 - 800 rpm for 5 - 10 minutes to obtain Component B.

[0117] Plate making and testing: Dilute according to the mass ratio (Component A: Component B: Solvent = 5:1:2), spray 40 - 60 μm on the electrophoresis plate, and after air-drying at room temperature for 2 hours, the test results are as follows:

[0118]

[0119] Except for item 3, the rest are tested after air-drying for 168 hours.

[0120] It can be seen from Examples 1, 2, 3 and Comparative Example 1 that for the bus cabin paint provided by Comparative Example 1, under the condition of air-drying at room temperature for 2 hours, the hardness test result far fails to meet the standard requirements, and even after air-drying for 168 hours, its water resistance still fails to meet the standard requirements. For Examples 1, 2, and 3, under the condition of air-drying at room temperature for 2 hours, the hardness test results can fully meet the standard requirements, and after air-drying for 168 hours, all mechanical properties and physical and chemical properties also fully meet the requirements.

[0121] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A super scratch-resistant quick-drying passenger car cabin paint, characterized in that: It includes component A and component B; The component A comprises the following raw materials in parts by weight: 40-50 parts of epoxy resin, 30-45 parts of pigments and fillers, 2.0-4.0 parts of anti-scratch additives, 0.2-0.3 parts of leveling agents, and 10-25 parts of first solvents; The component B comprises the following raw materials in parts by weight: 40-50 parts of an amine curing agent, 5-10 parts of a drying agent, and 45-50 parts of a second solvent.

2. The super scratch-resistant quick-drying passenger car cabin paint according to claim 1, characterized in that: The epoxy resin is E-20 bisphenol A epoxy resin, and the epoxy value is 0.18-0.

22.

3. The super scratch-resistant quick-drying passenger car cabin paint according to claim 1, characterized in that: The pigment and filler include one or more of rutile titanium dioxide, carbon black and precipitated barium sulfate.

4. The super scratch-resistant quick-drying passenger car cabin paint according to claim 1, characterized in that: The anti-scratch auxiliary agent is polytetrafluoroethylene wax powder.

5. The super scratch-resistant quick-drying passenger car cabin paint according to claim 1, characterized in that: The leveling agent is low molecular weight polysiloxane.

6. The super scratch-resistant quick-drying passenger car cabin paint according to claim 1, characterized in that: The first solvent and the second solvent have the same composition, both of which are S-100# solvent oil and n-butanol in a mass ratio of (3-5):

1.

7. The super scratch-resistant quick-drying passenger car cabin paint according to claim 1, characterized in that: The amine curing agent is polyamide resin.

8. The super scratch-resistant quick-drying passenger car cabin paint according to claim 1, characterized in that: The drying agent is an epoxy active monomer.

9. A method for preparing the super scratch-resistant quick-drying passenger car cabin paint according to any one of claims 1 to 8, characterized in that: The steps include: S1. Add epoxy resin to a container, add anti-scratch agent, leveling agent, pigment and filler, and the first solvent in sequence while stirring, keep stirring until uniform, grind until the dispersion fineness is less than 25 μm, and obtain component A; S2. Add polyamide resin, drying agent and second solvent into a container and stir evenly to obtain component B.

10. The method for preparing a super scratch-resistant quick-drying passenger car cabin paint according to claim 9, characterized in that: In S1, the stirring speed is 1500-2000 rpm, and the stirring speed is maintained for at least 30 minutes; In S2, the stirring speed is 500-800 rpm, and the stirring time is 5-10 min.

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