A kind of organic silicon coating adhesive used in new energy vehicles and its preparation method

Abstract

The present application relates to the technical field of organic silicone coating adhesives, and more specifically, to an organic silicone coating adhesive used in new energy vehicles and a preparation method thereof. The organic silicone coating adhesive is prepared from the following raw materials in parts by weight: 30-40 parts of methylphenyl silicone resin, 10-20 parts of hydroxyl-terminated polydimethylsiloxane, 20-30 parts of organic silicone-modified epoxy resin, 2-4 parts of leveling agent, 0.2-0.5 parts of cross-linking catalyst and 1-2 parts of cross-linking agent. By adopting the above formula, the organic silicone coating adhesive used in new energy vehicles is prepared, which has good electrical insulation properties, mechanical properties, corrosion resistance, flexibility, weather resistance and adhesion, and does not require the addition of solvents, which greatly shortens the curing time. The surface of the coating is smooth and flat after curing, and defects such as pinholes and bubbles in the coating are effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of organic silicon coating adhesives, and more specifically, to an organic silicon coating adhesive for use in new energy vehicles and a preparation method thereof. Background Art

[0002] At present, the coating adhesives mainly include polyurethane coating adhesive, acrylic coating adhesive, epoxy resin coating adhesive and silicone coating adhesive. Among them, silicone coating adhesive has good electrical properties, insulation, high and low temperature resistance, mechanical properties and flexibility, which makes it widely used in the field of new energy vehicles.

[0003] At present, silicone coating adhesives are mainly made of silicone resins, which often have high viscosity, which limits its processability and application range to a certain extent. By adding solvents, the overall viscosity of silicone coating adhesives can be reduced, making the coating adhesives easier to construct and improving operability and coating quality. However, the volatilization of solvents takes a certain amount of time, which will prolong the curing time of the coating adhesive. At the same time, incomplete or too fast volatilization of solvents may cause defects in the coating, such as pinholes and bubbles, which affect the use of silicone coating adhesives, so improvements are needed. Summary of the invention

[0004] In order to solve the problems that solvents prolong the curing time of silicone coating adhesive and may cause defects in the coating, such as pinholes and bubbles, etc., the present application provides a silicone coating adhesive for new energy vehicles and a preparation method thereof.

[0005] In the first aspect, the present application provides a silicone coating adhesive for new energy vehicles, which adopts the following technical solution:

[0006] An organic silicon coating adhesive for new energy vehicles is prepared from the following raw materials in parts by weight:

[0007] 30-40 parts of methylphenyl silicone resin

[0008] Hydroxyl-terminated polydimethylsiloxane 10-20 parts

[0009] 20-30 parts of silicone modified epoxy resin

[0010] 2-4 parts of leveling agent

[0011] Cross-linking catalyst 0.2-0.5 parts

[0012] 1-2 parts of crosslinking agent.

[0013] By adopting the above technical scheme, the prepared silicone coating adhesive for new energy vehicles has good electrical insulation properties, mechanical properties, corrosion resistance, flexibility, weather resistance and adhesion, and no solvent needs to be added, which can greatly shorten the curing time. At the same time, defects such as pinholes and bubbles in the coating are avoided, and the surface of the coating is smooth and flat after curing.

[0014] The viscosity of the silicone-modified epoxy resin in the present application is relatively low, and the viscosity between the hydroxyl-terminated polydimethylsiloxane and the methylphenyl silicone resin can be reconciled, reducing the use of solvents, thereby improving the fluidity of the silicone coating adhesive used in new energy vehicles, and facilitating the coating of the silicone coating adhesive used in new energy vehicles. In the present application, the methylphenyl silicone resin, the hydroxyl-terminated polydimethylsiloxane, and the silicone-modified epoxy resin undergo a cross-linking reaction under the action of a cross-linking agent to form a three-dimensional network structure, thereby improving the electrical insulation properties, mechanical properties, corrosion resistance, flexibility, weather resistance, and adhesion of the silicone coating adhesive used in new energy vehicles.

[0015] Leveling can reduce the surface tension of the entire system, making the silicone coating adhesive used in new energy vehicles flow more smoothly, reducing the generation of bubbles and defects, and helping the silicone coating adhesive used in new energy vehicles to form a uniform and defect-free adhesive layer on the surface of the adherend, thereby improving the bonding effect.

[0016] The cross-linking catalyst further accelerates the reaction of methylphenyl silicone resin, hydroxyl-terminated polydimethylsiloxane and silicone-modified epoxy resin, thereby increasing the curing speed of silicone coating adhesive used in new energy vehicles.

[0017] Preferably, the organosilicon-modified epoxy resin is prepared by the following method:

[0018] A: Under the protection of inert gas, mix catalyst A, heat to 60-80℃ and then add alkaline solution to react to obtain epoxy resin liquid;

[0019] B: Mix the organosilicon monomer and the organic solvent at 90-100°C, then add dilute hydrochloric acid and react for 2-3 hours to obtain an organosilicon monomer liquid;

[0020] C: mixing the epoxy resin liquid and the organosilicon monomer liquid, heating to 100-110° C., adding catalyst B for reaction, reacting for 3-5 hours, removing the organic solvent and water, and obtaining an organosilicon-modified epoxy resin;

[0021] The catalyst 1 is one of ammonium hydroxide, sodium hydroxide or potassium hydroxide;

[0022] The catalyst 2 is at least one of dibutyltin diacetate, dibutyltin dilaurate or dioctyltin dilaurate.

[0023] By adopting the above technical scheme, the prepared organosilicon-modified epoxy resin has low viscosity and is used to prepare organosilicon coating adhesives for new energy vehicles. It can greatly shorten the curing time of organosilicon coating adhesives for new energy vehicles, and at the same time improve the electrical insulation performance, mechanical properties, corrosion resistance, flexibility, weather resistance and adhesion of organosilicon coating adhesives for new energy vehicles. In step A, catalyst A and alkaline solution are used to further promote the ring-opening reaction to generate epoxy resin liquid with a higher molecular weight, which is beneficial to subsequent reactions; in step B, the organosilicon monomer is mixed with an organic solvent and heated at 90-100°C, so that the organosilicon monomer can be better dissolved in the solvent, which is convenient for subsequent reactions. At the same time, after adding dilute hydrochloric acid, the organosilicon monomer may undergo a condensation reaction to generate a compound with a silicon-oxygen-silicon bond; in step S3, catalyst B is used to promote the reaction between the epoxy group of the epoxy resin and the silicon-hydroxyl or silicon-alkoxy group of the organosilicon compound to form a new chemical bond, thereby realizing the modification of the epoxy resin by organosilicon.

[0024] Preferably, the weight parts of the raw materials used to prepare the organosilicon-modified epoxy resin are as follows: 20-30 parts

[0025] Catalyst A 0.5-1 part

[0026] 1-3 parts alkaline solution

[0027] 4-8 parts of silicone monomer

[0028] 0.5-1 part dilute hydrochloric acid

[0029] 10-15 parts of organic solvent

[0030] Catalyst B1-2 parts.

[0031] By adopting the above technical scheme, the amount of raw materials for preparing silicone-modified epoxy resin is optimized, so that aliphatic epoxy resin and silicone monomer can fully react and combine to obtain silicone-modified resin, further shortening the curing time of silicone coating adhesive used in new energy vehicles, and improving the electrical insulation properties, mechanical properties, corrosion resistance, flexibility, weather resistance and adhesion of silicone coating adhesive used in new energy vehicles.

[0032] Preferably, the epoxy equivalent is 80-110 g / eq, and the viscosity at 25° C. is 2000-4000 mPa.s.

[0033] Preferably, the organosilicon monomer is at least one of methylvinylchlorosilane, ethyltrichlorosilane, propyltrichlorosilane, vinyltrichlorosilane, γ-chloropropyltrichlorosilane, phenyldimethoxysilane and diphenyldiethoxysilane.

[0034] By adopting the above technical solution, the epoxy equivalent and viscosity of the aliphatic epoxy resin are optimized, and the types of the silicone monomers are optimized, which is conducive to the reaction between the aliphatic epoxy resin and the silicone monomer.

[0035] Preferably, the viscosity of the methylphenyl silicone resin at 25° C. is 10-300 mPa.s.

[0036] By adopting the above technical solution, the viscosity of methylphenyl silicone resin is optimized, the viscosity of the silicone coating adhesive used in new energy vehicles is further adjusted, and its fluidity is increased, which is beneficial to the coating of the silicone coating adhesive used in new energy vehicles.

[0037] Preferably, each portion of the leveling agent is obtained by mixing a silicone leveling agent and an acrylic leveling agent in a weight ratio of (4-6):3.

[0038] By adopting the above technical solution, the surface tension of the silicone coating adhesive used in new energy vehicles is further reduced, making it easier to wet the surface of the adherend and form a uniform, defect-free adhesive layer on the surface of the adherend. The silicone leveling agent significantly improves its wettability on the surface of the adherend by reducing the surface tension of the silicone coating adhesive, which helps the silicone coating adhesive to better penetrate into the surface of the substrate and form a tighter coating; the acrylic leveling agent can be oriented inside the coating, adjust the local surface tension identity, and further promote the uniform leveling of the coating. When used in conjunction with the silicone leveling agent, it can improve the adhesion, flatness and smoothness of the entire coating.

[0039] Preferably, the crosslinking agent includes at least one of vinyl triisopropenoxy silane, methyl trimethoxy silane, phenyl triisopropenoxy silane, vinyl trimethoxy silane, vinyl triisopropoxy silane, vinyl triethoxy silane and tetraisopropoxy silane.

[0040] By adopting the above technical scheme, the cross-linking effect between methylphenyl silicone resin, hydroxyl-terminated polydimethylsiloxane and silicone-modified epoxy resin is further improved, so that the coating formed by the silicone coating adhesive used in new energy vehicles has good adhesion, electrical insulation, high and low temperature resistance, moisture resistance, corrosion resistance, flexibility and elasticity.

[0041] Preferably, the cross-linking catalyst includes one of dibutyltin dilaurate, dibutyltin di(2-ethylhexanoate), dibutyltin diacetate and 1,1,3,3-tetramethyl-2-[3-(methoxysilylpropylpropyl)]guanidine.

[0042] By adopting the above technical solution, the curing of the silicone coating adhesive used in new energy vehicles can be further accelerated. At the same time, through the action of the above catalyst, the silicone coating adhesive used in new energy vehicles can form a stable structure after curing, and has better high and low temperature resistance, electrical insulation performance and weather resistance.

[0043] In the second aspect, the present application provides a method for preparing an organic silicon coating adhesive for new energy vehicles, using the following technical solution:

[0044] A method for preparing an organic silicon coating adhesive for new energy vehicles comprises the following preparation steps:

[0045] S1. Mix methylphenyl silicone resin, hydroxyl-terminated polydimethylsiloxane, silicone-modified epoxy resin and leveling agent evenly, and then heat to 60-80° C. under vacuum conditions and stir and disperse for 40-60 minutes;

[0046] S2. Cool down to 30-35°C, add the cross-linking agent under normal pressure and disperse for 10-20 minutes, then evacuate and continue stirring for 5-10 minutes; S3. Add the catalyst and stir for 10-15 minutes, then stir at high speed for 30-40 minutes under vacuum conditions, and then discharge the material to obtain the silicone coating adhesive used in new energy vehicles.

[0047] By adopting the above technical scheme, a silicone coating adhesive for new energy vehicles with good fluidity and easy coating is prepared. In step 1, methylphenyl silicone resin, silicone-modified epoxy resin, and silicone-modified epoxy resin can be evenly mixed to obtain a mixture with good fluidity and prevent bubbles from being generated in the system; adding the cross-linking agent first and then the catalyst is to ensure that the catalyst is evenly distributed in the mixture when the cross-linking reaction occurs, thereby more effectively promoting the curing reaction and obtaining a silicone coating adhesive with stable and uniform performance. If the catalyst is added first and then the cross-linking agent is added, the cross-linking reaction may occur rapidly under the action of the catalyst, but the cross-linking agent has not yet been fully dispersed, resulting in uneven curing or poor performance.

[0048] In summary, this application has the following beneficial effects:

[0049] 1. In the present application, methylphenyl silicone resin, hydroxyl-terminated polydimethylsiloxane, silicone-modified epoxy resin, leveling agent, cross-linking catalyst and cross-linking agent are prepared for use in new energy vehicle silicone coating adhesive, wherein methylphenyl silicone resin, hydroxyl-terminated polydimethylsiloxane and silicone-modified epoxy resin undergo cross-linking and curing reaction under the action of cross-linking catalyst and cross-linking agent, and can quickly form a three-dimensional network structure, thereby improving the electrical insulation properties, mechanical properties, corrosion resistance, flexibility, weather resistance and adhesion of the silicone coating adhesive used in new energy vehicles, and at the same time, the surface of the coating is smooth and flat after curing, without defects such as pinholes and bubbles.

[0050] 2. This application prepares modified silicone-modified epoxy resin by utilizing catalyst A, alkaline solution, silicone monomer, dilute hydrochloric acid, organic solvent and catalyst B, which is used to prepare silicone coating adhesive for new energy vehicles. The curing time of the silicone coating adhesive for new energy vehicles can be greatly shortened, while the electrical insulation properties, mechanical properties, corrosion resistance, flexibility, weather resistance and adhesion of the silicone coating adhesive for new energy vehicles can be improved. DETAILED DESCRIPTION

[0051] Example

[0052] The silicone leveling agent was purchased from Tianjin Ruike Chemical Trading Co., Ltd., model number is RF-7465.

[0053] The acrylic leveling agent was purchased from Shanghai Ziyi Chemical Co., Ltd., model number is ZY-1853.

[0054] Example 1

[0055] An organic silicon coating adhesive for new energy vehicles is prepared by the following method:

[0056] S1. Mix 100 g of methylphenyl silicone resin, 100 g of hydroxyl-terminated polydimethylsiloxane, 200 g of silicone-modified epoxy resin and 20 g of leveling agent, and then heat to 60° C. under vacuum and stir and disperse for 40 min.

[0057] S2, cooling to 30°C, adding 10 g of cross-linking agent under normal pressure and dispersing for 10 min, then vacuuming and stirring for 5 min;

[0058] S3. Add 2 g of a cross-linking catalyst and stir for 10 minutes, then stir at a high speed for 30-40 minutes under vacuum conditions, and then discharge the material to obtain an organic silicone coating adhesive for new energy vehicles.

[0059] Silicone-modified epoxy resin was purchased from Hubei Xinyuhong Biopharmaceutical Technology Co., Ltd. with the product number S112850512.

[0060] Hydroxyl-terminated polydimethylsiloxane was purchased from Hubei Kewode Chemical Co., Ltd. with a CAS number of 63148-60-7.

[0061] The methylphenyl silicone resin was purchased from Hubei Longsheng Sihai New Materials Co., Ltd. The viscosity of the methylphenyl silicone resin at 25°C is 10mPa.s, and the brand is SH-9603.

[0062] The difference between Example 2-3 and Example 1 is that the types, amounts and experimental parameters of some raw materials used to prepare the organic silicon coating adhesive for new energy vehicles are different. The specific differences are shown in Table 1:

[0063] Table 1 Types, amounts and experimental parameters of raw materials for preparing organic silicon coating adhesives for new energy vehicles in Examples 1-3

[0064]

[0065]

[0066] Example 4

[0067] A silicone coating adhesive for new energy vehicles, the difference between this embodiment and the embodiment is that the silicone-modified epoxy resin is prepared by the following method:

[0068] A: Under the protection of inert gas, mix 200g of A and 5g of catalyst A (ammonium hydroxide), heat to 60°C, and then add 10g of alkaline solution (15% by mass sodium hydroxide solution) to react to obtain epoxy resin liquid;

[0069] B: 40 g of organosilicon monomer (methylvinyl chlorosilane) and 100 g of organic solvent () were mixed at 90°C, and then 5 g of dilute hydrochloric acid (mass fraction 10%) was added and reacted for 2 h to obtain organosilicon monomer liquid;

[0070] C: The epoxy resin liquid and the organosilicon monomer liquid were mixed, the temperature was raised to 100° C., 10 g of catalyst B (dibutyltin diacetate) was added to react for 3 h, and the organic solvent and water were removed to obtain organosilicon-modified epoxy resin.

[0071] The epoxy equivalent is 80g / eq and the viscosity is 2000mPa.s at 25℃

[0072] Example 5

[0073] A silicone coating adhesive for new energy vehicles, the difference between this embodiment and the embodiment is that the silicone-modified epoxy resin is prepared by the following method:

[0074] A: Under the protection of inert gas, mix 300g of A and 10g of catalyst A (sodium hydroxide), heat to 80°C, and then add 30g of alkaline solution (10% by mass sodium hydroxide solution) to react to obtain epoxy resin liquid;

[0075] B: 80 g of organosilicon monomer (phenyldimethoxysilane) and 150 g of organic solvent () were mixed at 90°C, and then 10 g of dilute hydrochloric acid (mass fraction 15%) was added and reacted for 3 hours to obtain organosilicon monomer liquid;

[0076] C: The epoxy resin liquid and the organosilicon monomer liquid were mixed, the temperature was raised to 110° C., 20 g of catalyst B (dibutyltin dilaurate) was added to react for 5 h, and the organic solvent and water were removed to obtain an organosilicon-modified epoxy resin.

[0077] The epoxy equivalent is 110 g / eq and the viscosity is 4000 mPa.s at 25°C.

[0078] Example 6

[0079] A silicone coating adhesive for new energy vehicles. The difference between this embodiment and Example 4 is that bisphenol A epoxy resin is used instead of an aliphatic epoxy resin of equal mass, and the remaining raw material types, amounts and experimental parameters are consistent with those of Example 4.

[0080] Bisphenol A epoxy resin was purchased from Hubei Langbowan Biopharmaceutical Co., Ltd., model NPEL-128.

[0081] Example 7

[0082] A silicone coating adhesive for new energy vehicles. The difference between this embodiment and embodiment 4 is that no alkaline solution is added in step A, and the remaining raw material types, amounts and experimental parameters are consistent with those in embodiment 4.

[0083] Example 8

[0084] A silicone coating adhesive used in new energy vehicles, which is different from Example 1 in that: the leveling agent is obtained by mixing 11.4g of silicone leveling agent and 8.6g of acrylic leveling agent in a weight ratio of 4:3, and the remaining raw material types, amounts and experimental parameters are consistent with Example 1.

[0085] Example 9

[0086] A silicone coating adhesive used in new energy vehicles, which is different from Example 4 in that: the leveling agent is obtained by mixing 13.3g of a silicone leveling agent and 6.7g of an acrylic leveling agent in a weight ratio of 6:3, and the remaining raw material types, amounts and experimental parameters are consistent with Example 4.

[0087] Example 10

[0088] A silicone coating adhesive used in new energy vehicles, which is different from Example 1 in that: the methylphenyl silicone resin is purchased from Hubei Longsheng Sihai New Materials Co., Ltd., the viscosity of the methylphenyl silicone resin at 25°C is 300mPa.s, and the brand is SH-9603.

[0089] Comparative Example

[0090] Comparative Example 1

[0091] A silicone coating adhesive for new energy vehicles. The difference between this comparative example and Example 1 is that methyl silicone resin is used instead of methylphenyl silicone resin of equal mass, and the remaining raw material types, amounts and experimental parameters are consistent with Example 1.

[0092] The methyl silicone resin was purchased from Anhui Mingyi Silicon Industry Co., Ltd. The viscosity at 25°C was 10 mPa.s and the model was MY950.

[0093] Comparative Example 2

[0094] A silicone coating adhesive for new energy vehicles. The difference between this comparative example and Example 1 is that toluene is used instead of an equal mass of silicone-modified epoxy resin, and the remaining raw material types, amounts and experimental parameters are consistent with those in Example 1.

[0095] Comparative Example 3

[0096] A silicone coating adhesive for new energy vehicles. The difference between this comparative example and Example 1 is that toluene is used instead of hydroxyl-terminated polydimethylsiloxane of equal mass, and the remaining raw material types, amounts and experimental parameters are consistent with Example 1.

[0097] Performance testing The organic silicone coating adhesives for new energy vehicles prepared in Examples 1-10 and Comparative Examples 1-3 were tested for surface drying time, hardness, tensile strength, elongation, peel strength, voltage breakdown strength, volume resistivity, corrosion resistance and aging tests.

[0098] Detection method / test method Surface drying time: refer to GB / T 13477.5-2003, the temperature is 100℃, observe whether there are defects such as pinholes and bubbles on the surface.

[0099] The performance test of the organic silicon coating adhesive for new energy vehicles prepared in Examples 1-10 was carried out, wherein the data of hardness, peel strength and insulation resistance were the hardness obtained by testing the product after curing for 7 days at 25±5°C and 55±10%Rh: GB / T 531-1999;

[0100] Tensile strength: GB / T 528-1998;

[0101] Elongation: GB / T 528-1998;

[0102] Peel strength: GB / T 13477.18-2003;

[0103] Voltage breakdown strength: ASTM D149-97a;

[0104] Volume resistivity: ASTM D257-2007.

[0105] Corrosion resistance test: The test is carried out according to GB / T10125-2012 artificial atmosphere corrosion test salt spray test.

[0106] Aging test: double 85 aging for 100h. The experimental data is shown in Table 2:

[0107] Table 2 Experimental data of Examples 1-10 and Comparative Examples 1-3

[0108]

[0109]

[0110] It can be seen from Examples 1-10 and Comparative Examples 1-3 in combination with Table 2 that the silicone coating adhesive used in new energy vehicles prepared by the formula in the present application has a good construction effect without using a solvent, and the curing time is short. The adhesive layer after curing has good hardness, tensile strength, adhesion, electrical properties, corrosion resistance and weather resistance.

[0111] Comparing Example 1 with Comparative Example 1, the curing time in Comparative Example 1 is longer, and the hardness, tensile strength, adhesion, electrical properties, corrosion resistance and weather resistance are not as good as those in Example 1;

[0112] Comparing Example 1 with Comparative Example 2, bubbles appeared in Comparative Example 2 during the surface drying time test;

[0113] Comparing Example 1 with Comparative Example 3, bubbles appeared in Comparative Example 3 during the surface drying time test;

[0114] From Example 1 and Comparative Examples 1-3, it can be seen that in the present application, by using methylphenyl silicone resin together with hydroxyl-terminated polydimethylsiloxane and silicone-modified epoxy resin, the curing time of the silicone coating adhesive used in new energy vehicles can be shortened, and the hardness, tensile strength, adhesion, electrical properties, corrosion resistance and weather resistance of the silicone coating adhesive used in new energy vehicles can be improved. At the same time, the surface of the silicone coating adhesive used in new energy vehicles is flat and smooth after curing.

[0115] By comparing the embodiment with embodiment 4-5, the curing time of embodiment 4-5 is further shortened, and the hardness, tensile strength, adhesion and electrical properties are improved;

[0116] Comparing Example 4 with Examples 6-7, Examples 6-7 have a long curing time, and their hardness, tensile strength, adhesion and electrical properties are not as good as those of Example 4;

[0117] It can be seen from Example 1 and Examples 4-7 that the silicone-modified epoxy resin prepared by the present application is used to prepare silicone coating adhesives for new energy vehicles, which can greatly shorten the curing time of silicone coating adhesives for new energy vehicles. At the same time, it can also improve the hardness, tensile strength, adhesion and electrical properties of the silicone coating adhesives for new energy vehicles.

[0118] Comparing Example 1 with Example 8, the curing time in Example 8 is shortened, and the hardness, tensile strength and adhesion are slightly improved, indicating that the use of silicone leveling agent and acrylic leveling agent together can help shorten the curing time of silicone-modified epoxy resin and improve the hardness, tensile strength and adhesion of silicone coating adhesive used in new energy vehicles.

[0119] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A silicone coating adhesive for new energy vehicles, characterized in that: Prepared from the following raw materials in parts by weight: 30-40 parts of methylphenyl silicone resin Hydroxyl-terminated polydimethylsiloxane 10-20 parts 20-30 parts of silicone modified epoxy resin 2-4 parts of leveling agent Cross-linking catalyst 0.2-0.5 parts 1-2 parts of cross-linking agent; The organosilicon-modified epoxy resin is prepared by the following method: A: Under the protection of inert gas, epoxy resin and catalyst A are mixed, the temperature is raised to 60-80°C, and then alkaline solution is added to react to obtain epoxy resin liquid; B: Mix the organosilicon monomer and the organic solvent at 90-100°C, then add dilute hydrochloric acid and react for 2-3 hours to obtain an organosilicon monomer liquid; C: mixing the epoxy resin liquid and the organosilicon monomer liquid, heating to 100-110° C., adding catalyst B for reaction, reacting for 3-5 hours, removing the organic solvent and water, and obtaining an organosilicon-modified epoxy resin; The catalyst A is one of ammonium hydroxide, sodium hydroxide or potassium hydroxide; The catalyst B is at least one of dibutyltin diacetate, dibutyltin dilaurate or dioctyltin dilaurate; The weight parts of the raw materials used to prepare the organosilicon-modified epoxy resin are as follows: Epoxy resin 20-30 parts Catalyst A 0.5-1 part 1-3 parts alkaline solution 4-8 parts of silicone monomer 0.5-1 part dilute hydrochloric acid 10-15 parts of organic solvent Catalyst B1-2 parts; The epoxy equivalent of the epoxy resin is 80-110 g / eq, and the viscosity at 25° C. is 2000-4000 mPa.s; The organosilicon monomer is at least one of methylvinyl chlorosilane, ethyltrichlorosilane, propyltrichlorosilane, vinyltrichlorosilane, γ-chloropropyltrichlorosilane, phenyldimethoxysilane and diphenyldiethoxysilane; The viscosity of the methylphenyl silicone resin at 25° C. is 10-300 mPa.s.

2. The organic silicon coating adhesive for new energy vehicles according to claim 1, characterized in that: Each portion of the leveling agent is obtained by mixing an organic silicon leveling agent and an acrylic leveling agent in a weight ratio of (4-6):

3.

3. The organic silicon coating adhesive for new energy vehicles according to claim 1, characterized in that: The crosslinking agent includes at least one of vinyl triisopropenoxy silane, methyl trimethoxy silane, phenyl triisopropenoxy silane, vinyl trimethoxy silane, vinyl triisopropoxy silane, vinyl triethoxy silane and tetraisopropoxy silane.

4. The organic silicon coating adhesive for new energy vehicles according to claim 1, characterized in that: The cross-linking catalyst includes one of dibutyltin dilaurate, dibutyltin di(2-ethylhexanoate), dibutyltin diacetate and 1,1,3,3-tetramethyl-2-[3-(methoxysilylpropyl)]guanidine.

5. A method for preparing an organic silicon coating adhesive for new energy vehicles as claimed in any one of claims 1 to 4, characterized in that: The method comprises the following preparation steps: S1. Mix methylphenyl silicone resin, hydroxyl-terminated polydimethylsiloxane, silicone-modified epoxy resin and leveling agent evenly, and then heat to 60-80° C. under vacuum conditions and stir and disperse for 40-60 minutes; S2, cool down to 30-35°C, add crosslinking agent and disperse for 10-20 minutes under normal pressure, then evacuate and continue stirring for 5-10 minutes; S3, adding a cross-linking catalyst and stirring for 10-15 minutes, and then stirring at a high speed for 30-40 minutes under vacuum conditions, and then discharging the material to obtain an organic silicone coating adhesive for new energy vehicles.

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