Oil-proof anti-pollution cabin display screen protective film and preparation method thereof
By adding additives rich in fluorine and quaternary ammonium salt structure to the outer membrane layer of the vehicle cockpit display protective film, the problem of easy attachment of the display screen by dirt is solved, and the effects of anti-oil, anti-bacterial and anti-static are achieved, and the service life is extended.
Patent Information
- Application Number
- CN202510062615.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-04-29
AI Technical Summary
After long-term use, the car cockpit display is easily adhered to fingerprints, sweat stains, dust and other dirt, which affects the service life and visual effect.
A protective film of oil-resistant and anti-fouling cockpit display screen was designed. By adding additives rich in fluorine-containing elements and quaternary ammonium salt structures to the outer membrane layer, and chemically interacting with epoxy acrylate resin, a stable outer membrane layer is formed to reduce dirt adhesion and improve antibacterial and antistatic properties.
Effectively prevent fingerprints, sweat stains, dust and other dirt from adhering, extend the service life of the display protective film, and have excellent antibacterial and antistatic properties.
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Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of protective films, and in particular, relates to an oil-proof and anti-fouling cockpit display screen protective film and a preparation method thereof. Background Art
[0002] With the rapid development of electronic product technology, electronic products will be used in more and more occasions. Protective film can beautify electronic products and extend the life of electronic products.
[0003] The car cockpit display is a commonly used electronic product. Long-term use is prone to many unavoidable problems: the touch screen panel is easily attached with fingerprints, sweat stains, dust and other dirt, and it is not easy to wipe off, which seriously affects the service life and visual effect. Therefore, it is urgent to design and prepare an oil-proof and anti-fouling cockpit display protective film to meet market demand. Summary of the invention
[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an oil-proof and anti-fouling cockpit display screen protective film and a preparation method thereof.
[0005] The purpose of the present invention can be achieved through the following technical solutions: An oil-proof and anti-fouling cockpit display screen protective film is sequentially arranged from the outside to the inside as an outer film layer, an adhesive layer, and an inner film layer.
[0006] Furthermore, the outer film layer is prepared by the following steps: 80-90 parts of polyethylene terephthalate resin, 25-35 parts of polyimide resin, 10-20 parts of epoxy acrylate resin, 5-10 parts of auxiliary agent, 2-4 parts of compatibilizer, 1-3 parts of dispersant and 0.01-0.1 parts of catalyst are weighed and mixed evenly by weight, and then put into a twin-screw granulator for extrusion, granulation and blow molding to obtain an outer film layer.
[0007] Furthermore, the auxiliary agent is prepared by the following steps: S1. Add diallylamine and chloroform to a dry three-necked flask, stir evenly and heat to 65°C, then slowly add 3-(perfluorooctyl)-1,2-propylene oxide under nitrogen protection, keep warm for 3 hours after the addition is complete, cool to room temperature after the reaction is complete, distill under reduced pressure, purify by column chromatography (a mixed solvent of benzene and ether is selected as the eluent, and the volume ratio of benzene and ether is 6:4), and distill under reduced pressure to obtain intermediate 1; the amount ratio of diallylamine, 3-(perfluorooctyl)-1,2-propylene oxide and chloroform is 14.4mL:28mL:200mL; Under heating conditions, the molar ratio of diallylamine and 3-(perfluoro-n-octyl)-1,2-epoxypropylene is controlled to be 1.1-1.2:1, and the -NH- of diallylamine reacts with the epoxy group of 3-(perfluoro-n-octyl)-1,2-epoxypropylene. The reaction process is as follows:
[0008] S2. Under nitrogen protection, add intermediate 1, triethylamine and dimethyl sulfoxide to a dry three-necked flask, stir to dissolve, then heat to 70°C, slowly add tetradecyl chloride, and continue to react at 70°C for 4 hours after the addition is completed. After the reaction is completed, cool to room temperature, and distill under reduced pressure to obtain an auxiliary agent; the amount ratio of intermediate 1, tetradecyl chloride, triethylamine and dimethyl sulfoxide is 34g:17.4mL:10mL:220mL.
[0009] Triethylamine is used as an acid binding agent, and the molar ratio of intermediate 1 to tetradecane chloride is controlled to be 1:1.05-1.1. Then, intermediate 1 and tetradecane chloride undergo a substitution reaction under heating, and the reaction process is as follows:
[0010] There is a large amount of fluorine in the additives. Fluorine is the most electronegative non-metallic element and has a strong electron affinity, which makes it difficult for fluorine atoms to be polarized in compounds. When additives containing fluorine are added to the outer film layer, the surface free energy of the outer film layer can be significantly reduced, thereby reducing the contact ability of the outer film layer with other substances, making the outer film layer effectively waterproof and oil-proof.
[0011] There is a quaternary ammonium salt structure (side alkyl chain contains 14 carbon atoms) in the auxiliary agent, and the quaternary ammonium salt structure is antibacterial by destroying cell membrane structure, denaturing protein, interfering with enzyme system, changing cell membrane permeability, interfering with nucleic acid and protein synthesis. The strength of the antibacterial activity of the quaternary ammonium salt structure is mainly determined by the chain length of the alkyl chain on its N atom. The quaternary ammonium salt structure with a length of alkyl chain greater than 10 carbon atoms or less than 16 carbon atoms has the best antibacterial activity, and when the carbon number is 14, the antibacterial property is the best. And the length of the alkyl chain in the quaternary ammonium salt structure of the auxiliary agent of the present invention is 14 carbon atoms, therefore, the auxiliary agent of the present invention has excellent antibacterial property, and can effectively improve the antifouling and antibacterial property of the outer film layer. In addition, as a kind of cationic surfactant, quaternary ammonium salt can effectively absorb moisture in the air due to its special chemical structure and property, thereby showing excellent antistatic effect, and then the outer film layer of the present invention also possesses antistatic effect.
[0012] The additive contains a terminal carbon-carbon double bond, which can react chemically with the carbon-carbon double bond at the end of the epoxy acrylate resin under the action of a trace catalyst, and then the additive is grafted onto the macromolecular chain of the epoxy acrylate resin. The additive is not easy to migrate and fall out, and can continue to play an oil-proof and waterproof, antibacterial and antistatic role, and protect the outer film layer for a long time, making the display screen protective film not easy to be attached by fingerprints, sweat stains, dust and other dirt, greatly extending the service life of the display screen protective film.
[0013] Furthermore, the compatibilizer is one or more of 1,6-hexanediol diacrylate, ethylene glycol monoethyl ether, and propyl acetate.
[0014] Furthermore, the dispersant is one or more of ethyl cellulose, cellulose acetate, cellulose acetate propionate, and cellulose acetate butyrate.
[0015] Furthermore, the catalyst is one or more of N,N-dimethylbenzylamine, trimethylbenzyl ammonium chloride, benzoyl peroxide, diisopropylbenzene peroxide, and azobisisobutyronitrile.
[0016] Furthermore, the adhesive layer is one of silicone glue, acrylic glue, polyurethane glue and pressure-sensitive adhesive.
[0017] Furthermore, the inner film layer is one of a polyethylene film, a polypropylene film, a polyvinyl chloride film, and a polyethylene terephthalate film.
[0018] A method for preparing an oil-proof and anti-fouling cockpit display screen protective film comprises the following steps: The raw material of the adhesive layer is coated on the inner film layer to form the adhesive layer, and then the outer film layer is attached to the adhesive layer to obtain the oil-proof and anti-fouling cockpit display screen protective film.
[0019] The beneficial effects of the present invention are as follows: the auxiliary agent of the present invention contains abundant fluorine elements and quaternary ammonium salt structures (the side alkyl chain contains 14 carbon atoms), and there is a chemical reaction between the auxiliary agent and the epoxy acrylate resin, so the auxiliary agent can stably exist in the outer film layer and is not easy to migrate and fall out. Therefore, the display screen protective film of the present invention is not easy to be attached by fingerprints, sweat stains, dust and other dirt, and the service life is greatly extended. DETAILED DESCRIPTION
[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] Example 1, preparation of auxiliary agent, the specific steps are as follows: S1. Add 14.4 mL of diallylamine and 200 mL of chloroform into a 500 mL dry three-necked flask, stir evenly and heat to 65°C, then slowly add 28 mL of 3-(perfluoro-n-octyl)-1,2-propylene oxide under nitrogen protection, keep warm for 3 h after the addition is complete, cool to room temperature after the reaction is complete, distill under reduced pressure, purify by column chromatography (a mixed solvent of benzene and ether is selected as the eluent, and the volume ratio of benzene and ether is 6:4), and distill under reduced pressure to obtain intermediate 1; S2. Under nitrogen protection, add 34 g of intermediate 1, 10 mL of triethylamine and 220 mL of dimethyl sulfoxide into a 500 mL dry three-necked flask, stir to dissolve and then heat to 70°C, then slowly add 17.4 mL of tetradecyl chloride. After the addition is completed, continue to keep the temperature at 70°C for 4 hours. After the reaction is completed, cool to room temperature and distill under reduced pressure to obtain an auxiliary agent.
[0022] Example 2, preparing the outer film layer, the specific steps are as follows: 80 parts of polyethylene terephthalate resin, 25 parts of polyimide resin, 10 parts of epoxy acrylate resin, 5 parts of the auxiliary agent prepared in Example 1, 2 parts of 1,6-hexanediol diacrylate, 1 part of ethyl cellulose, and 0.01 part of N,N-dimethylbenzylamine were weighed and mixed uniformly, and then put into a twin-screw granulator for extrusion, granulation, and blow molding to obtain an outer film layer.
[0023] Example 3, preparing the outer film layer, the specific steps are as follows: 88 parts of polyethylene terephthalate resin, 32 parts of polyimide resin, 17 parts of epoxy acrylate resin, 8 parts of the auxiliary agent prepared in Example 1, 1 part of ethylene glycol monoethyl ether, 1 part of ethyl cellulose, 1 part of cellulose acetate, and 0.05 part of benzoyl peroxide were weighed and mixed uniformly, and then put into a twin-screw granulator for extrusion, granulation, and blow molding to obtain an outer film layer.
[0024] Example 4, preparing the outer film layer, the specific steps are as follows: 90 parts of polyethylene terephthalate resin, 35 parts of polyimide resin, 20 parts of epoxy acrylate resin, 10 parts of the auxiliary agent prepared in Example 1, 4 parts of propyl acetate, 3 parts of cellulose acetate propionate, and 0.1 part of trimethylbenzyl ammonium chloride were weighed and mixed uniformly, and then put into a twin-screw granulator for extrusion, granulation, and blow molding to obtain an outer film layer.
[0025] Example 5, preparing an oil-proof and anti-fouling cockpit display screen protective film, the specific steps are as follows: The raw material of the adhesive layer is coated on the inner film layer of the polyvinyl chloride film to form a silicone adhesive layer, and then the outer film layer prepared in Example 2 is attached to the silicone adhesive layer to obtain an oil-proof and anti-fouling cockpit display screen protective film.
[0026] Example 6, preparing an oil-proof and anti-fouling cockpit display screen protective film, the specific steps are as follows: The raw material of the adhesive layer is coated on the inner film layer of the polypropylene film to form a polyurethane adhesive layer, and then the outer film layer prepared in Example 3 is attached to the polyurethane adhesive layer to obtain an oil-proof and anti-fouling cockpit display screen protective film.
[0027] Example 7, preparing an oil-proof and anti-fouling cockpit display screen protective film, the specific steps are as follows: The raw material of the adhesive layer is coated on the inner film layer of the polyethylene terephthalate film to form a pressure-sensitive adhesive layer, and then the outer film layer prepared in Example 4 is attached to the pressure-sensitive adhesive layer to obtain an oil-proof and anti-fouling cockpit display screen protective film.
[0028] Comparative Example 1, preparing the outer film layer, the specific steps are as follows: The remaining steps remain unchanged, only the auxiliary agent in Example 2 is removed to prepare the outer film layer.
[0029] Comparative Example 2, preparing the outer film layer, the specific steps are as follows: The remaining steps remained unchanged, except that the auxiliary agent in Example 2 was replaced by 2.5 parts of 3-(perfluorooctyl)-1,2-propylene oxide and 2.5 parts of didodecyldimethylammonium bromide to prepare the outer film layer.
[0030] Comparative Example 3: A cockpit display screen protective film is prepared, and the specific steps are as follows: The remaining steps remain unchanged, only the outer film layer of Example 5 is replaced by the outer film layer prepared in Comparative Example 1 to obtain a cockpit display screen protective film.
[0031] Comparative Example 4: A cockpit display screen protective film is prepared, and the specific steps are as follows: The remaining steps remain unchanged, only the outer film layer of Example 5 is replaced by the outer film layer prepared in Comparative Example 2 to obtain a cockpit display screen protective film.
[0032] Performance Testing (1) Light transmittance test: The outer film layers of Examples 2-4 and Comparative Examples 1-2 were cut into small pieces of 50 mm × 50 mm, placed in the test window of a light transmittance and haze tester at room temperature (25°C), and the light transmittance was tested three times, and the average value was taken; (2) Waterproof and oil-proof test: The contact angles of water and rapeseed oil on the outer film layers of Examples 2-4 and Comparative Examples 1-2 were used to test the water-proof and oil-proof effects of the protective film surfaces; (3) Antibacterial test: Gram-positive bacteria S. aureus and Gram-negative bacteria E. coli were selected to conduct antibacterial tests on the outer film layers of Examples 2-4 and Comparative Examples 1-2; (4) Antistatic test: The electrostatic surface density of the outer film layers of Examples 2-4 and Comparative Examples 1-2 was tested with reference to GB / T19082-2003; The test results of all items are shown in the following table:
[0033] “ / ” indicates no antibacterial effect.
[0034] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0035] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.
Claims
1. An oil-proof and anti-fouling cockpit display screen protective film, characterized in that: From the outside to the inside, they are arranged in sequence as an outer film layer, an adhesive layer, and an inner film layer, and the outer film layer is prepared by the following steps: 80-90 parts of polyethylene terephthalate resin, 25-35 parts of polyimide resin, 10-20 parts of epoxy acrylate resin, 5-10 parts of auxiliary agent, 2-4 parts of compatibilizer, 1-3 parts of dispersant and 0.01-0.1 parts of catalyst are weighed and mixed uniformly, and then put into a twin-screw granulator for extrusion, granulation and film blowing to obtain an outer film layer; Wherein, the auxiliary agent is prepared by the following steps: S1. Add diallylamine and chloroform into a flask, stir and heat to 65°C, add 3-(perfluorooctyl)-1,2-propylene oxide, react for 3 hours, cool, distill under reduced pressure, purify by column chromatography, and distill under reduced pressure to obtain intermediate 1; S2. Under nitrogen protection, add intermediate 1, triethylamine and dimethyl sulfoxide into a flask, stir and heat to 70°C, add tetradecyl chloride, react for 4 hours, cool, and distill under reduced pressure to obtain an auxiliary agent.
2. The oil-proof and anti-fouling cockpit display screen protective film according to claim 1, characterized in that: The usage ratio of diallylamine, 3-(perfluorooctyl)-1,2-propylene oxide and chloroform in step S1 is 14.4 mL:28 mL:200 mL.
3. The oil-proof and anti-fouling cockpit display screen protective film according to claim 1, characterized in that: The usage ratio of the intermediate 1, tetradecane chloride, triethylamine and dimethyl sulfoxide in step S2 is 34 g: 17.4 mL: 10 mL: 220 mL.
4. The oil-proof and anti-fouling cockpit display screen protective film according to claim 1, characterized in that: The compatibilizer is one or more of 1,6-hexanediol diacrylate, ethylene glycol monoethyl ether, and propyl acetate.
5. The oil-proof and anti-fouling cockpit display screen protective film according to claim 1, characterized in that: The dispersant is one or more of ethyl cellulose, cellulose acetate, cellulose acetate propionate, and cellulose acetate butyrate.
6. The oil-proof and anti-fouling cockpit display screen protective film according to claim 1, characterized in that: The catalyst is one or more of N,N-dimethylbenzylamine, trimethylbenzyl ammonium chloride, benzoyl peroxide, diisopropylbenzene peroxide and azobisisobutyronitrile.
7. The oil-proof and anti-fouling cockpit display screen protective film according to claim 1, characterized in that: The adhesive layer is one of silica gel, acrylic glue, polyurethane glue and pressure-sensitive adhesive.
8. The oil-proof and anti-fouling cockpit display screen protective film according to claim 1, characterized in that: The inner film layer is one of a polyethylene film, a polypropylene film, a polyvinyl chloride film, and a polyethylene terephthalate film.
9. The method for preparing an oil-proof and anti-fouling cockpit display screen protective film according to claim 1, characterized in that: The following steps are involved: The raw material of the adhesive layer is coated on the inner film layer to form the adhesive layer, and then the outer film layer is attached to the adhesive layer to obtain the oil-proof and anti-fouling cockpit display screen protective film.