A light pink anti-fouling car cover film

Abstract

This invention discloses a light pink anti-fouling car wrap film, belonging to the field of automotive film technology. The light pink anti-fouling car wrap film is configured from the inside out as an adhesive layer, a flexible substrate, a coloring layer, and an anti-fouling protective layer. The adhesive layer raw materials include: 50-60 parts deionized water, 50-60 parts soft monomers, 15-25 parts hard monomers, 3-9 parts functional monomers, 1-3 parts pH adjuster, 0.8-1.2 parts additives, 0.3-0.9 parts emulsifier, and 0.1-0.8 parts initiator. The car wrap film of this invention not only has bright colors, is not easy to fade, and has high durability, but also has hydrophobic and self-cleaning properties. The additives containing hindered phenolic and benzimidazole structures chemically interact with the soft, hard, and functional monomers in the adhesive layer. Therefore, the additives can exist stably and persistently in the adhesive layer and fully exert their effects, giving the adhesive layer of this invention a highly efficient and durable anti-aging effect and adhesion capability.

Description

Technical Field

[0001] This invention belongs to the field of automotive film technology, specifically, it relates to a light pink anti-fouling car wrap film. Background Technology

[0002] With the increasing popularity of cars, more and more families are choosing to travel by car, and people's demand for personalized car services is also growing. Car wrapping is a protective film applied to the car's paint surface. It not only effectively prevents scratches and sand damage, but also protects the paint from acid rain, oil stains, bird droppings, and other corrosive substances. Furthermore, it retains the original color and gloss of the car's paint after removal.

[0003] Traditional colored car wraps typically use a flexible transparent substrate. Colored pigments are added during the substrate molding process, and the substrate is extruded and cast to form a colored substrate, which is then further processed to create the colored car wrap. Some methods achieve color by adding a color-changing layer to the car wrap film. Patent CN 112940634A, "A TPU Effect Color-Changing Car Wrap and its Preparation Process," describes this by adding a multi-layer effect color-changing layer composed of a PU ink system to a transparent base layer. Patent CN116333618A, "A Color-Changing Car Wrap and its Preparation Method," describes this by adding a water-based acrylic-polyurethane-based colored pigment layer to the base layer to achieve color changing. However, the coloring methods of the above-mentioned color-changing car wraps all use chemical pigments, which are prone to low color brightness, poor durability, and fading after prolonged exposure to sunlight. Furthermore, since the car wrap itself does not have a self-cleaning function, dirt can easily penetrate into the film, causing damage and shortening its lifespan.

[0004] In addition, due to the long-term exposure of cars to wind and sun, the adhesive layer of car wrap film is prone to aging, yellowing, hardening and cracking, which affects its use. Therefore, in the field of car wrap, the requirements for the aging resistance of the adhesive layer and its adhesion to the substrate are relatively high. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a light pink anti-fouling car wrap film.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A light pink anti-fouling car wrap film is composed of an adhesive layer, a flexible base, a coloring layer, and an anti-fouling protective layer from the inside out.

[0008] Furthermore, the thickness of the adhesive layer is 20-70 μm.

[0009] Further, the adhesive layer comprises the following raw materials in parts by weight: 50-60 parts deionized water, 50-60 parts soft monomer, 15-25 parts hard monomer, 3-9 parts functional monomer, 1-3 parts pH adjuster, 0.8-1.2 parts additives, 0.3-0.9 parts emulsifier, and 0.1-0.8 parts initiator.

[0010] Furthermore, the soft monomer is one or more of ethyl acrylate, n-butyl acrylate, isooctyl acrylate, dodecyl acrylate, and n-propyl acrylate.

[0011] Furthermore, the hard monomer is one or more of methyl acrylate, methyl methacrylate, vinyl acetate, butyl methacrylate, and isobornyl methacrylate.

[0012] Furthermore, the functional monomer is one or more of acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, glycidyl methacrylate, 2-hydroxyethyl methacrylate, and N-hydroxymethylacrylamide.

[0013] Furthermore, the pH adjuster is ammonia.

[0014] Furthermore, the auxiliary agent is prepared by the following steps:

[0015] S1. Under nitrogen protection, trimethylolpropane triacrylate, DBU (1,8-diazobisspirocyclic [5.4.0]undec-7-ene) and 1,4-dioxane were added to a three-necked flask and stirred until homogeneous. Then, a mixed solution of 7-bromo-1H-benzimidazole-5-amine and 1,4-dioxane was slowly added. After the addition was complete, the temperature was raised to 60℃ and the reaction was carried out for 48 hours. After the reaction was completed, the mixture was distilled under reduced pressure to obtain intermediate 1. The ratio of trimethylolpropane triacrylate, 7-bromo-1H-benzimidazole-5-amine, DBU and 1,4-dioxane was 21.6 mL:18.3 g:2.4 mL:120 mL.

[0016] Under the catalysis of DBU, with the molar ratio of trimethylolpropane triacrylate and 7-bromo-1H-benzimidazole-5-amine controlled at 1:1.05-1.1, trimethylolpropane triacrylate undergoes a Michael addition reaction with 7-bromo-1H-benzimidazole-5-amine. The reaction process is shown below:

[0017]

[0018] S2. Under nitrogen protection, intermediate 1 and DMF (N,N-dimethylformamide) were added to a dry three-necked flask and stirred thoroughly until completely dissolved. Then, a mixed solution of 3,5-di(tert-butyl)-4-hydroxyphenylpropionic acid, 3-hydroxy-2,2-bis(hydroxymethyl)propyl ester and DMF was slowly added. The temperature was then raised to 50°C and the reaction was stirred for 3 hours. During the entire reaction, the pH of the system was adjusted to 7 using 10 wt% sodium carbonate solution. After the reaction was completed, the mixture was cooled to room temperature, washed three times with deionized water by centrifugation, and then washed three times with anhydrous ethanol by centrifugation. Finally, it was dried at 80°C for 12 hours to obtain the auxiliary agent. The ratio of 3,5-di(tert-butyl)-4-hydroxyphenylpropionic acid, 3-hydroxy-2,2-bis(hydroxymethyl)propyl ester, intermediate 1 and DMF was 23.8 g: 32.6 g: 200 mL.

[0019] Under heating conditions, with the molar ratio of 3,5-di(tert-butyl)-4-hydroxyphenylpropionic acid, 3-hydroxy-2,2-bis(hydroxymethyl)propyl ester, and intermediate 1 controlled at 1:1.05-1.1, a substitution reaction occurs between the -OH group of 3,5-di(tert-butyl)-4-hydroxyphenylpropionic acid, 3-hydroxy-2,2-bis(hydroxymethyl)propyl ester, and the -Br group of intermediate 1. The reaction process is shown below:

[0020]

[0021] The additive contains a hindered phenolic structure, which can provide hydrogen atoms to free radicals to terminate the chain reaction, or directly combine with active free radicals to form new relatively stable free radicals, thereby disrupting any step in the free radical reaction process, playing a protective role, and maintaining the stability of the appearance and mechanical properties of the adhesive layer. Therefore, the additive solves the problems of fading, yellowing, hardening and cracking of the adhesive layer, extends its service life, and enables it to continue to play an adhesive role.

[0022] The additive contains a benzimidazole structure, which has conjugated π bonds that can form stable coordination bonds with metal ions such as iron, copper, and zinc. Therefore, adding the additive to the adhesive layer can enhance the adhesion between the adhesive layer and the substrate. Furthermore, the benzimidazole structure...

[0023] The additive contains multiple hydroxyl groups and acrylate groups. The hydroxyl groups can form hydrogen bonds with water, which increases the compatibility of the additive. The acrylate groups can react chemically with the double bonds in soft monomers, hard monomers and functional monomers under the action of the initiator. Therefore, the compatibility of the additive is further increased. At the same time, the additive can exist stably in the adhesive layer and is not easy to migrate or fall out. Thus, the additive can play its role to the maximum extent, so that the adhesive layer has a highly efficient and long-lasting anti-aging effect and adhesion ability.

[0024] Furthermore, the emulsifier is one or more of sodium sulfosuccinate, sodium ethoxylated alkyl sulfate, sodium dodecyl sulfonate, and sodium dodecylbenzene sulfonate.

[0025] Furthermore, the initiator is one or more of potassium persulfate, ammonium persulfate, sodium persulfate, benzoyl peroxide, and azobisisobutyronitrile.

[0026] Furthermore, the flexible substrate is one of polyurethane substrate, polyvinyl chloride substrate, and polyimide substrate, with a thickness of 300-600μm.

[0027] Furthermore, the coloring layer is composed of a composite film layer consisting of three thin films.

[0028] The three-layer composite coloring layer design formed on a flexible substrate can effectively improve the color intensity, increase its weather resistance and service life, while increasing the adhesion to the substrate and improving the overall tensile strength of the car cover.

[0029] Furthermore, the composite film layer consists of a carbon film, a low-refractive-index dielectric film, and a high-refractive-index dielectric film from the inside out.

[0030] Furthermore, the carbon film is a black diamond-like film with a thickness of 1-2 μm.

[0031] Furthermore, the low refractive index dielectric film is AlO. X N Y Thin film with an X / Y value of 1.1-1.4, a refractive index range of 1.7-1.9, and a thickness of 90-150 nm.

[0032] Furthermore, the high refractive index dielectric film is AlO. X N Y Thin film with an X / Y value of 0.2-0.5, a refractive index range of 2.0-2.2, and a thickness of 180-240 nm.

[0033] Furthermore, the anti-fouling protective layer is a fluorine-free silica sol with a thickness of 60-150 nm.

[0034] Furthermore, the fluorine-free silica sol comprises the following raw materials in weight percentages: 40% anhydrous ethanol, 10-20% isopropanol, 3-10% hexamethylcyclotrisilazane, 1-10% polyethylene glycol, 4-6% tetraethyl orthosilicate, and the balance being deionized water.

[0035] Furthermore, the molecular weight of the polyethylene glycol is 1000-6000 g / mol.

[0036] The outermost layer uses a non-fluorinated antifouling protective layer, which can not only effectively reduce surface energy and improve hydrophobicity to achieve surface antifouling effect, but also greatly reduce corrosion compared to traditional fluorinated materials.

[0037] The beneficial effects of this invention are:

[0038] 1. When the light pink anti-fouling car wrap film of the present invention is pasted on the outer surface of a car, the chromatic coordinate value of the reflected structural color is: L when observed from the upper surface of the film along the normal direction. * The value is 53.2-57.1, a * The value is 35.0-38.2, b * The contact angle of the car cover is ≥140°, and the roll-off angle is ≤15°. Therefore, the light pink anti-fouling car cover film of the present invention not only has the advantages of bright color, not easy to fade, and high durability, but also has hydrophobic and self-cleaning functions.

[0039] 2. The adhesive layer of the car wrap film of the present invention contains additives with hindered phenolic structure and benzimidazole structure, and the additives have chemical interactions with the soft monomers, hard monomers and functional monomers in the adhesive layer. Therefore, the additives can exist stably in the adhesive layer for a long time and play a full role, so that the adhesive layer of the present invention has a highly efficient and long-lasting anti-aging effect and adhesion ability. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] The specific steps for preparing the auxiliary agent are as follows:

[0043] S1. Under nitrogen protection, 21.6 mL of trimethylolpropane triacrylate, 2.4 mL of LdBU and 80 mL of 1,4-dioxane were added to a 250 mL three-necked flask. After stirring evenly, 18.3 g of a mixed solution of 7-bromo-1H-benzimidazole-5-amine and 40 mL of 1,4-dioxane were slowly added. After the addition was complete, the temperature was raised to 60 °C and the reaction was carried out for 48 h. After the reaction was completed, the mixture was distilled under reduced pressure to obtain intermediate 1.

[0044] S2. Under nitrogen protection, 32.6 g of intermediate 1 and 150 mL of LDMF were added to a 250 mL dry three-necked flask and stirred thoroughly until completely dissolved. Then, a mixed solution of 23.8 g of 3,5-di(tert-butyl)-4-hydroxyphenylpropionic acid, 3-hydroxy-2,2-bis(hydroxymethyl)propyl ester and 50 mL of LDMF was slowly added. The temperature was then raised to 50 °C and the reaction was stirred for 3 h. During the entire reaction, the pH of the system was adjusted to 7 using 10 wt% sodium carbonate solution. After the reaction was completed, the mixture was cooled to room temperature, washed three times with deionized water by centrifugation, and then washed three times with anhydrous ethanol by centrifugation. Finally, it was dried at 80 °C for 12 h to obtain the auxiliary agent.

[0045] Example 2

[0046] The specific steps for preparing a light pink stain-resistant car wrap film are as follows:

[0047] (1) Select a polyurethane substrate with a thickness of 300μm;

[0048] (2) A black diamond-like carbon film with a thickness of 1 μm was prepared on a polyurethane substrate with a thickness of 300 μm by using a vacuum roll-to-roll magnetron sputtering coating equipment and a DC radio frequency coupling sputtering process.

[0049] (3) A low refractive index dielectric film (AlO2) with a thickness of 90 nm and a refractive index range of 1.9 was prepared on a carbon film using a vacuum roll-to-roll magnetron sputtering equipment and a medium-frequency reactive sputtering process. X N Y Thin film (X / Y ratio 1.1);

[0050] (4) Using a vacuum roll-to-roll magnetron sputtering coating equipment and a medium-frequency reactive sputtering process, a high-refractive-index dielectric film (AlO2) with a thickness of 240 nm and a refractive index range of 2.0 is prepared on the surface of a low-refractive-index dielectric film. X N Y Thin film (X / Y value 0.5);

[0051] (5) Mix 40% anhydrous ethanol, 20% isopropanol, 3% hexamethylcyclotrisilazane, 10% polyethylene glycol (molecular weight 1000 g / mol), 4% tetraethyl orthosilicate and 23% deionized water by weight to prepare a fluorine-free silica sol, then transfer it to a roll-to-roll slot coating equipment, and then use the slot coating process to prepare a 60 nm thick anti-fouling protective layer on the surface of a high refractive index dielectric film.

[0052] (6) Add 22.5 parts of deionized water and 0.21 parts of sodium sulfosuccinate to an emulsification tank and stir and disperse for 20 min. Then add 50 parts of dodecyl acrylate, 15 parts of methyl methacrylate, 3 parts of hydroxyethyl acrylate, and 0.8 parts of the additives prepared in Example 1. Stir and disperse rapidly for 1 h to obtain a pre-emulsion. Dissolve 0.1 parts of azobisisobutyronitrile in 0.5 parts of deionized water to obtain an initiator solution. Add 27 parts of deionized water and 0.2 parts of sodium sulfosuccinate to a reaction vessel, stir and heat to 80°C, then add 5% of the pre-emulsion and 70% of the initiator solution. After reacting for 12 minutes, the remaining pre-emulsion and initiator solution were added dropwise over 5 hours, with the reaction temperature controlled at 90°C. The reaction was then maintained at this temperature for 1 hour after the addition was complete. The temperature was lowered to below 50°C, and 1 part ammonia was added. The mixture was stirred until homogeneous, and the pH was adjusted to 8. The mixture was then filtered through a 200-mesh filter cloth and discharged to obtain an emulsion. The resulting emulsion was coated onto a PET release film using a scraping process to obtain a 70 μm thick adhesive layer. After the adhesive layer was semi-dry, it was directly laminated onto the other side of a 300 μm thick polyurethane substrate at room temperature. The film was then dried at 70°C to obtain a light pink anti-fouling car wrap film.

[0053] Example 3

[0054] The specific steps for preparing a light pink stain-resistant car wrap film are as follows:

[0055] (1) Select a polyvinyl chloride substrate with a thickness of 450μm;

[0056] (2) A black diamond-like carbon film with a thickness of 1.5 μm was prepared on a polyvinyl chloride substrate with a thickness of 450 μm by using a vacuum roll-to-roll magnetron sputtering coating equipment and a DC radio frequency coupled sputtering process.

[0057] (3) A low refractive index dielectric film (AlO2) with a thickness of 120 nm and a refractive index range of 1.8 was prepared on a carbon film using a vacuum roll-to-roll magnetron sputtering coating equipment and a medium-frequency reactive sputtering process. X N Y Thin film (X / Y ratio 1.2);

[0058] (4) Using a vacuum roll-to-roll magnetron sputtering coating equipment and a medium-frequency reactive sputtering process, a high-refractive-index dielectric film (AlO2) with a thickness of 210 nm and a refractive index range of 2.1 was prepared on the surface of a low-refractive-index dielectric film. X N Y Thin film (X / Y value 0.4);

[0059] (5) Mix 40% anhydrous ethanol, 15% isopropanol, 6% hexamethylcyclotrisilazane, 5% polyethylene glycol (molecular weight 4000 g / mol), 5% tetraethyl orthosilicate and 29% deionized water by weight to prepare a fluorine-free silica sol, then transfer it to a roll-to-roll slot coating equipment, and then use the slot coating process to prepare a 120 nm thick anti-fouling protective layer on the surface of a high refractive index dielectric film.

[0060] (6) Add 24 parts of deionized water and 0.4 parts of sodium dodecylbenzenesulfonate to an emulsifying tank and stir and disperse for 20 min. Then add 58 parts of n-butyl acrylate, 21 parts of methyl methacrylate, 7 parts of glycidyl methacrylate and 1.1 parts of the additive prepared in Example 1, and stir and disperse rapidly for 1 h to obtain a pre-emulsion. Add 0.3 parts of potassium persulfate and 0.3 parts of benzoyl peroxide to 0.55 parts of deionized water to dissolve and obtain an initiator solution. Add 30.45 parts of deionized water and 0.3 parts of sodium dodecylbenzenesulfonate to a reaction vessel, stir and heat to 80°C, and add 5% of the pre-emulsion and 7 parts of sodium dodecylbenzenesulfonate. 0% initiator solution, react for 12 min, then start adding the remaining pre-emulsion and initiator solution dropwise over 5 h, controlling the reaction temperature at 90℃, and keep the reaction at this temperature for 1 h after the addition is complete; cool down to below 50℃, add 2 parts ammonia water, stir evenly, adjust the pH to 8, filter with a 200-mesh filter cloth, and discharge to obtain an emulsion; apply the obtained emulsion to a PET release film using a scraping process to obtain an adhesive layer with a thickness of 50 μm, and after the adhesive layer is semi-dry, directly laminate it to the other side of a 450 μm thick polyvinyl chloride base using a room temperature lamination method, and dry at 70℃ to obtain a light pink anti-fouling car wrap film.

[0061] Example 4

[0062] The specific steps for preparing a light pink stain-resistant car wrap film are as follows:

[0063] (1) Select a polyimide substrate with a thickness of 600 μm;

[0064] (2) A black diamond-like carbon film with a thickness of 2 μm was prepared on a polyimide substrate with a thickness of 600 μm by using a vacuum roll-to-roll magnetron sputtering coating equipment and a DC radio frequency coupling sputtering process.

[0065] (3) A low refractive index dielectric film (AlO2) with a thickness of 150 nm and a refractive index range of 1.7 was prepared on a carbon film using a vacuum roll-to-roll magnetron sputtering equipment and a medium-frequency reactive sputtering process. X N Y Thin film (X / Y value 1.4);

[0066] (4) Using a vacuum roll-to-roll magnetron sputtering coating equipment and a medium-frequency reactive sputtering process, a high-refractive-index dielectric film (AlO2) with a thickness of 180 nm and a refractive index range of 2.2 is prepared on the surface of a low-refractive-index dielectric film. X N Y Thin film (X / Y value 0.2);

[0067] (5) Mix 40% anhydrous ethanol, 10% isopropanol, 10% hexamethylcyclotrisilazane, 1% polyethylene glycol (molecular weight 6000 g / mol), 6% tetraethyl orthosilicate and 33% deionized water by weight to prepare a fluorine-free silica sol, then transfer it to a roll-to-roll slot coating equipment, and then use the slot coating process to prepare a 150 nm thick anti-fouling protective layer on the surface of a high refractive index dielectric film.

[0068] (6) Add 27 parts deionized water, 0.33 parts sodium ethoxylated alkyl sulfate, and 0.3 parts sodium dodecyl sulfate to an emulsifying tank and stir and disperse for 20 min. Then add 60 parts n-propyl acrylate, 15 parts vinyl acetate, 10 parts isobornyl methacrylate, 9 parts 2-hydroxyethyl methacrylate, and 1.2 parts of the additives prepared in Example 1, and stir and disperse rapidly for 1 h to obtain a pre-emulsion. Dissolve 0.8 parts sodium persulfate in 0.6 parts deionized water to obtain an initiator solution. Add 32.4 parts deionized water, 0.17 parts sodium ethoxylated alkyl sulfate, and 0.1 parts sodium dodecyl sulfate to a reaction vessel, stir, and heat to a certain temperature. At 80℃, add 5% pre-emulsion and 70% initiator solution, react for 12 minutes, then start adding the remaining pre-emulsion and initiator solution dropwise over 5 hours, controlling the reaction temperature at 90℃, and maintain the temperature for 1 hour after the addition is complete; cool down to below 50℃, add 3 parts ammonia water, stir evenly, adjust the pH to 8, filter with a 200-mesh filter cloth, and discharge to obtain an emulsion; apply the obtained emulsion to a PET release film using a scraping process to obtain an adhesive layer with a thickness of 20μm, and after the adhesive layer is semi-dry, directly laminate it to the other side of a 600μm thick polyimide substrate using a room temperature lamination method, and dry at 70℃ to obtain a light pink anti-fouling car wrap film.

[0069] Comparative Example 1

[0070] The specific steps for preparing car wrap film are as follows:

[0071] The remaining steps remain unchanged, except that the additives in step (6) of Example 4 are removed to prepare the car wrap film.

[0072] Comparative Example 2

[0073] The specific steps for preparing car wrap film are as follows:

[0074] The remaining steps remain unchanged, except that the additives in step (6) of Example 4 are replaced with 0.6 parts of antioxidant 1010 and 0.6 parts of 1,3-benzodiazepine to prepare the car wrap film.

[0075] Performance testing

[0076] The car wrap films prepared in Examples 2-4 were subjected to colorimetric tests (when light is incident perpendicularly from the upper surface of the film along the normal direction and then observed at a 0° angle in the opposite direction along the perpendicular incident direction, the color coordinate value L of the reflected structural color was recorded). * value, a * value and b * The following table shows the test results for all items, including the contact angle, roll-off angle, and contact value of the car cover surface.

[0077] Table 1

[0078] Test Project Example 2 Example 3 Example 4 <![CDATA[L * Value 53.2 55.0 57.1 <![CDATA[a * Value 35.0 36.1 38.2 <![CDATA[b * Value 3.3 12.5 16.1 Car cover surface contact angle / ° 140 145 143 Roll angle / ° 15 10 12

[0079] As shown in Table 1, the color coordinate values ​​of the reflective structural color of the car wrap film obtained in Examples 2-4 of this invention are: L * The value is 53.2-57.1, a * Values ​​are 35.0-38.2, b * The contact angle of the car cover surface is ≥140° and the roll-off angle is ≤15°. The light pink anti-fouling car cover film of the present invention not only has the advantages of bright color, not easy to fade and high durability, but also has hydrophobic and self-cleaning functions.

[0080] The 180° peel strength of the car wrap adhesive layer prepared in step (6) of Examples 2-4 and Comparative Examples 1-2 was tested according to GB / T 2792-2014; the residual adhesive of the car wrap adhesive layer prepared in step (6) of Examples 2-4 and Comparative Examples 1-2 was evaluated after peeling after aging in an environment of 100℃ and 90% humidity for 30 days; the holding power of the car wrap adhesive layer prepared in step (6) of Examples 2-4 and Comparative Examples 1-2 was tested with a 2kg weight at room temperature; the tensile strength of the car wrap prepared in Examples 2-4 and Comparative Examples 1-2 before and after aging at 110℃ for 48h was tested according to GB / T 30693-2014; the test results of all items are shown in Table 2 below:

[0081] Table 2

[0082]

[0083] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A light pink anti-fouling car film, characterized in that, The adhesive layer, the flexible substrate, the coloring layer and the anti-fouling protective layer are sequentially arranged from inside to outside; the adhesive layer has a thickness of 20-70 microns and comprises the following raw materials in parts by weight: 50-60 parts of deionized water, 50-60 parts of soft monomer, 15-25 parts of hard monomer, 3-9 parts of functional monomer, 1-3 parts of pH regulator, 0.8-1.2 parts of auxiliary agent, 0.3-0.9 parts of emulsifier and 0.1-0.8 parts of initiator; The auxiliary agent is prepared by the following steps: S1, under nitrogen protection, trimethylolpropane triacrylate, DBU and 1,4-dioxane are added into a flask, stirred, 7-bromo-1H-benzimidazole-5-amine and 1,4-dioxane are added, reacted at 60℃ for 48h, distilled under reduced pressure to obtain intermediate 1; the dosage ratio of trimethylolpropane triacrylate, 7-bromo-1H-benzimidazole-5-amine, DBU and 1,4-dioxane is 21.6mL:18.3g:2.4mL:120mL; S2, under nitrogen protection, intermediate 1 and DMF are added into a flask, stirred, 3,5-di(tert-butyl)-4-hydroxy-benzenepropionic acid, 3-hydroxy-2,2-bis(hydroxymethyl)propyl and DMF are added, reacted at 50℃ for 3h, the pH value of the system is adjusted to 7, cooled, washed and dried to obtain the auxiliary agent; the dosage ratio of 3,5-di(tert-butyl)-4-hydroxy-benzenepropionic acid, 3-hydroxy-2,2-bis(hydroxymethyl)propyl, intermediate 1 and DMF is 23.8g:32.6g:200mL.

2. The light pink anti-fouling car coat film according to claim 1, characterized in that, The soft monomer is one or more of ethyl acrylate, n-butyl acrylate, iso-octyl acrylate, dodecyl acrylate and n-propyl acrylate; the hard monomer is one or more of methyl acrylate, methyl methacrylate, vinyl acetate, butyl methacrylate and isobornyl methacrylate; the functional monomer is one or more of acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, glycidyl methacrylate, 2-hydroxyethyl methacrylate and N-hydroxymethyl acrylamide.

3. The light pink anti-fouling car coat film of claim 1, wherein, The pH regulator is ammonia water; the emulsifier is one or more of sodium sulfosuccinate, ethoxylated sodium alkyl sulfate, sodium dodecyl sulfonate and sodium dodecylbenzenesulfonate; the initiator is one or more of potassium persulfate, ammonium persulfate, sodium persulfate, dibenzoyl peroxide and azobisisobutyronitrile.

4. The light pink anti-fouling car coat film of claim 1, wherein, The flexible substrate is one of polyurethane substrate, polyvinyl chloride substrate and polyimide substrate, and has a thickness of 300-600 microns.

5. The light pink anti-fouling car coat film of claim 1, wherein, The coloring layer is composed of a composite film layer composed of three layers of film.

6. A light pink anti-fouling car coat film according to claim 5, characterized in that, The composite film layer sequentially comprises a carbon film, a low-refractive-index medium film and a high-refractive-index medium film from inside to outside.

7. The light pink anti-fouling car coat film according to claim 6, characterized in that, The carbon film is a black diamond-like carbon film with a thickness of 1-2 microns.

8. The light pink anti-fouling car coat film according to claim 6, characterized in that, The low refractive index dielectric film is AlO X N Y Thin film with X / Y value of 1.1-1.4, refractive index range of 1.7-1.9, and thickness of 90-150 nm; high refractive index dielectric film is AlO X N Y Thin film with X / Y value of 0.2-0.5, refractive index range of 2.0-2.2, and thickness of 180-240 nm.

9. The light pink anti-stain car coat film of claim 1, wherein, The anti-fouling protective layer is a fluorine-free silica sol with a thickness of 60-150 nanometers.

10. The light pink anti-fouling car coat film according to claim 9, characterized in that, The silicon sol without fluorine group comprises raw materials in the following weight percentages: anhydrous ethanol 40%, isopropyl alcohol 10-20%, hexamethylcyclotrisilazane 3-10%, polyethylene glycol 1-10%, tetraethyl orthosilicate 4-6%, and the rest is deionized water; the molecular weight of the polyethylene glycol is 1000-6000 g / mol.

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