Fluorine-free anti-fingerprint agent composition and anti-fingerprint coating

Abstract

The present application relates to the technical field of surface coating, in particular to a fluorine-free anti-fingerprint agent composition and anti-fingerprint coating. The fluorine-free anti-fingerprint agent composition provided by the present application comprises, in mass percentage: 1-10% of trimethoxysilane-terminated polydimethylsiloxane; 15-30% of a silane compound with multiple trimethoxy termini; 10-25% of a long-chain alkyl trimethoxysilane compound; and 50-65% of a solvent. By using the polysiloxane compound, other polysilane compound and silane coupling agent in combination, the fluorine-free anti-fingerprint film formed by vacuum evaporation or magnetron sputtering has good hydrophobic effect and wear resistance, and has a very wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, and in particular to a fluorine-free anti-fingerprint agent composition, its preparation method, and its application. Background Technology

[0002] Traditional perfluoropolyether anti-fingerprint coatings possess excellent hydrophobic, stain-resistant, and abrasion-resistant properties, making them widely used in touchscreen devices, electronic products, and various precision instrument surfaces. However, these compounds are expensive and decompose exceptionally slowly, easily accumulating in humans, animals, and the environment over time. Therefore, developing environmentally friendly, fluorine-free alternatives has become an urgent industry need.

[0003] Currently, there are many literature reports on fluorine-free anti-fingerprint coatings. For example, patent CN108504269B uses acrylic / acrylate monomers containing double bonds, which are cured under ultraviolet light or sunlight to obtain a fluorine-free anti-fouling coating, thereby avoiding the use of fluorine-containing materials or solvents. However, this method has high requirements for the light source, and the double bond energy of the acrylic compounds used is low and easily oxidized, the preparation steps are complicated, and the reaction conditions are harsh. Patent CN111363428A uses polydimethylsiloxane-modified polyacrylate as the matrix and trimethylolpropane tri[3] as the substrate. (2 Using methylaziridine propionate as a crosslinking agent and dysprosium-doped nano-titanium oxide / strontium titanate core-shell material as a reinforcing filler can achieve fingerprint and stain resistance, but the preparation process involves high-temperature calcination, which is not conducive to industrial production. Patent CN121319622A uses a combination of polysiloxane compounds and silane coupling agents to obtain a fluorine-free anti-fingerprint film by forming a hybrid with polysiloxane compounds of specific molecular weight and / or specific structure. However, this technology has an initial water contact angle of 100-102°, which is difficult to achieve good antifouling performance.

[0004] Therefore, there is an urgent need to develop a new type of fluorine-free anti-fingerprint coating that, while maintaining its environmental advantages, can match the initial hydrophobicity, abrasion resistance and overall durability of traditional fluorine-containing products. Summary of the Invention

[0005] To address the aforementioned technical problems and shortcomings in the field, the present invention aims to provide a fluorine-free anti-fingerprint agent composition and its preparation method. It does not use fluorine-containing compounds, is low-cost, environmentally friendly, and non-toxic; it also exhibits good thermal stability; and the preparation method is simple, convenient, easy to implement, safe, and environmentally friendly. By depositing the fluorine-free anti-fingerprint agent prepared according to the present invention onto the surface of a substrate through vacuum evaporation or magnetron sputtering, a dense fluorine-free anti-fingerprint film with excellent anti-fingerprint properties is obtained.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A fluorine-free anti-fingerprint agent composition and its preparation method are disclosed, comprising 1%~10% of a trimethoxy-terminated polydimethylsiloxane; 15%~35% of a silane compound having multiple trimethoxy-terminated ends; 10%~25% of a long-chain alkyltrimethoxysilane compound; and 50%~65% of a solvent.

[0007] The trimethoxy-terminated polydimethylsiloxane is prepared by reacting trimethoxysilane with a single-terminated hydrogen-containing silicone oil, wherein the single-terminated hydrogen-containing silicone oil has a molecular weight of 2000-10000 g / mol.

[0008] In some preferred embodiments, the method for preparing the trimethoxy-terminated polydimethylsiloxane is as follows: Hydrogen-containing silicone oil, trimethoxysilane, caster catalyst, and solvent were added to the reaction vessel, and the vessel was purged with inert gas three times. The reaction was carried out at 65-90℃ for 1-24 h, and the degree of reaction was determined by infrared detection of the Si-H peak. The molar ratio of the single-ended hydrogen-containing silicone oil to trimethoxysilane is 1:1.0~1.5; the cassette catalyst is 0.5‰~1% of the system weight; the solvent is a common organic solvent such as esters, ketones, and benzenes; the molecular weight of the single-ended hydrogen-containing silicone oil is 2000-10000 g / mol.

[0009] The silane compound with multiple trimethoxy-terminated ends is the product of the reaction of a compound containing multiple hydroxyl groups, a compound containing multiple amino groups, or a compound containing both hydroxyl and amino groups with isocyanate-propyltrimethoxysilane.

[0010] The compound containing multiple hydroxyl groups or multiple amino groups or multiple compounds containing both hydroxyl and amino groups are selected from at least one of pentaerythritol, dipentaerythritol, polyester polyol, polyethyleneimine, tris(hydroxymethyl)aminomethane, serine, 1,3-diamino-2-hydroxypropane, and 1,3-bis[tris(hydroxymethyl)methylamino]propane, or are products of the reaction of the above compounds with diisocyanates or polycyanates.

[0011] The molar ratio of the compound containing multiple hydroxyl groups or multiple amino groups or multiple compounds containing both hydroxyl and amino groups to isocyanate-propyltrimethoxysilane is 1:3~10; the reaction temperature is 60-120℃.

[0012] In some preferred embodiments, the method for preparing the silane compound having multiple trimethoxyl-terminated ends is as follows: Compounds containing multiple hydroxyl groups, multiple amino groups, or multiple hydroxyl and amino groups in their molecules are added to DMF, a catalyst is added, and the mixture is purged with an inert gas three times before the temperature is increased to ensure uniform dissolution. Subsequently, a DMF solution of isocyanate-propyltrimethoxysilane is slowly added dropwise through a dropping funnel.

[0013] The reaction temperature is 60-120℃; the molar ratio of the two reactants is 1:3.9~4.2; the compound containing multiple hydroxyl groups or multiple amino groups or multiple hydroxyl and amino groups is at least one of pentaerythritol, dipentaerythritol, polyester polyol, polyethyleneimine, tris(hydroxymethyl)aminomethane, serinel, 1,3-diamino-2-hydroxypropane, and 1,3-bis[tris(hydroxymethyl)methylamino]propane; the catalyst is at least one of dibutyltin dilaurate, dioctyltin dilaurate, and stannous octoate.

[0014] The long-chain alkyltrimethoxysilane compound is dodecyltrimethoxysilane or higher. Preferably, the long-chain alkyltrimethoxysilane compound is hexadecyltrimethoxysilane.

[0015] Another technical solution of the present invention is to provide the application of the fluorine-free anti-fingerprint composition in the preparation of an anti-fingerprint coating, characterized in that the composition is coated on the surface of a substrate and cured to form an anti-fingerprint coating.

[0016] The curing method is thermal curing; the thermal curing temperature is 80-150℃, the time is 20-60 min, and the substrate is glass, metal, ceramic or plastic.

[0017] The fluorine-free anti-fingerprint agent is deposited on a substrate by vacuum evaporation or magnetron sputtering to form a fluorine-free anti-fingerprint coating, which is then cured at high temperature to obtain a fluorine-free anti-fingerprint film. Further, the curing conditions for the fluorine-free anti-fingerprint film are: baking at 120–180°C for 20 minutes. 45 minutes.

[0018] The key technical feature of this invention is the introduction of silane compounds with multiple trimethoxy end groups, which have better waterproof, oil-proof, and wear-resistant effects compared with single or double end groups. Detailed Implementation

[0019] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0020] Synthesis example 1 10 mmol of hydrogen-containing silicone oil, 12 mmol of trimethoxysilane, 0.1 g of caster catalyst, and 30 g of ethyl acetate were added to a reaction vessel. The mixture was purged three times with an inert gas and reacted at 65 °C for 18 h. The reaction was stopped after the disappearance of Si-H by infrared detection. Activated carbon was added for adsorption, and the mixture was then passed through diatomaceous earth. After rotary evaporation of the solvent, a trimethoxy-terminated polysiloxane was obtained. The reaction formula is as follows: .

[0021] Synthesis example 2 3.814 g (15 mmol) of dipentaerythritol, 80 g of DMF, and 3 drops of DBTDL catalyst were added to a reaction flask. The mixture was evacuated and protected with nitrogen, then heated to 80 °C to completely dissolve the catalyst. Subsequently, 18.48 g (90 mmol) of 3-isocyanopropyltrimethoxysilane diluted with 20 g of DMF was slowly added dropwise. After the addition was complete, the reaction was allowed to proceed for 24 h. Infrared spectroscopy showed the absence of isocyanate groups, indicating the reaction had stopped. The silane was adsorbed onto activated carbon and passed through diatomaceous earth. After rotary evaporation, several trimethoxy-terminated silane compounds A were obtained. The reaction formula is as follows: .

[0022] Synthesis example 3 3.030 g (25 mmol) of tris(hydroxymethyl)aminomethane, 80 g of DMF, and 3 drops of DBTDL catalyst were added to a reaction flask. The mixture was evacuated and protected with nitrogen, then heated to 80 °C to completely dissolve the catalyst. Subsequently, 20.530 g (100 mmol) of 3-isocyanopropyltrimethoxysilane diluted with 25 g of DMF was slowly added dropwise. After the addition was complete, the reaction was allowed to proceed for 24 h. Infrared spectroscopy showed the absence of isocyanate groups, indicating the reaction had stopped. The silane was adsorbed onto activated carbon and passed through diatomaceous earth. After rotary evaporation, several trimethoxy-terminated silane compounds B were obtained. The reaction equation is as follows: .

[0023] Synthesis example 4 3.4 g (25 mmol) pentaerythritol, 100 g DMF, and 3 drops of DBTDL catalyst were added to a reaction flask. The mixture was evacuated and protected with nitrogen, then heated to 90 °C to completely dissolve the catalyst. Subsequently, 20.530 g (100 mmol) of 3-isocyanopropyltrimethoxysilane diluted with 25 g DMF was slowly added dropwise. After the addition was complete, the reaction was allowed to proceed for 24 h. Infrared spectroscopy showed no isocyanate residue, indicating the reaction had stopped. The silane was adsorbed onto activated carbon and passed through diatomaceous earth. After rotary evaporation, several trimethoxy-terminated silane compounds C were obtained. The reaction equations are as follows: .

[0024] Synthesis example 5 2.7 g (30 mmol) of 1,3-diamino-2-hydroxypropane, 30 g of DMF, and 3 drops of DBTDL catalyst were added to a reaction flask. The mixture was evacuated and protected with nitrogen, then heated to 80 °C to completely dissolve the catalyst. Subsequently, 18.45 g (90 mmol) of 3-isocyanopropyltrimethoxysilane diluted with 50 g of DMF was slowly added dropwise. After the addition was complete, the reaction was allowed to proceed for 24 h. Infrared spectroscopy showed the absence of isocyanate groups, indicating the reaction had stopped. The silane was adsorbed onto activated carbon and passed through diatomaceous earth. After rotary evaporation, several trimethoxy-terminated silane compounds D were obtained. The reaction equations are as follows: .

[0025] Synthesis example 6 3.2 g (20 mmol) of N-(3-aminopropyl)diethanolamine, 30 g of DMF, and 3 drops of DBTDL catalyst were added to a reaction flask. The mixture was evacuated and protected with nitrogen, then heated to 80 °C to completely dissolve the catalyst. Subsequently, 12.32 g (60 mmol) of 3-isocyanopropyltrimethoxysilane diluted with 15 g of DMF was slowly added dropwise. After the addition was complete, the reaction was allowed to proceed for 24 h. Infrared spectroscopy showed the absence of isocyanate groups, indicating the reaction had stopped. The silanes were adsorbed onto activated carbon and passed through diatomaceous earth. After rotary evaporation, several trimethoxy-terminated silane compounds E were obtained. The reaction equations are as follows: .

[0026] Synthesis Example 7 20.53 g (100 mmol) of 3-isocyanopropyltrimethoxysilane was diluted 1 / 2 with EA, and 3 drops of DBTDL catalyst were added. 22.137 g (100 mmol) of aminopropyltriethoxysilane was diluted 1 / 2 with EA and added dropwise. The reaction was carried out at room temperature for 24 h under nitrogen protection. The reaction was stopped when infrared spectroscopy showed no isocyanate groups. The solvent was evaporated to obtain silane compound F. The reaction equation is as follows: .

[0027] Synthesis example 8 3.1 g (50 mmol) of ethylene glycol was diluted 1 / 2 with EA, and 3 drops of DBTDL catalyst were added. 20.53 g (100 mmol) of 3-isocyanopropyltrimethoxysilane was diluted 1 / 2 with EA and added dropwise. The reaction was carried out at room temperature for 24 h under nitrogen protection. The reaction was stopped when infrared spectroscopy showed no isocyanate groups. The solvent was evaporated to obtain silane compound G. The reaction equation is as follows: .

[0028] Synthesis example 9 3.05 g (50 mmol) of ethanolamine was diluted 1 / 2 with EA, and 3 drops of DBTDL catalyst were added. 20.53 g (100 mmol) of 3-isocyanopropyltrimethoxysilane was diluted 1 / 2 with EA and added dropwise. The reaction was carried out at room temperature for 24 h under nitrogen protection. The reaction was stopped when infrared spectroscopy showed the absence of isocyanate groups. The solvent was evaporated to obtain silane compound H. The reaction equation is as follows: .

[0029] Example 1 Two parts (by mass, the same below) of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), ten parts of the multiple trimethoxy-terminated silane compounds A obtained in Synthesis Example (2), five parts of hexadecyltrimethoxysilane, and 23 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5 g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was deposited on a glass substrate by vacuum evaporation to form a coating, and then baked at 150°C for 30 min to cure and obtain a fluorine-free anti-fingerprint coating.

[0030] Example 2 Two parts (by weight, the same below) of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), ten parts of the multiple trimethoxy-terminated silane compounds A1 obtained in Synthesis Example (2), and 28 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5 g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was deposited on a glass substrate by vacuum evaporation to form a coating, and then baked at 150°C for 30 min to cure and obtain a fluorine-free anti-fingerprint coating.

[0031] Example 3 Two parts of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), ten parts of the multiple trimethoxy-terminated silane compounds B obtained in Synthesis Example (3), five parts of hexadecyltrimethoxysilane, and 23 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was deposited on a glass substrate by vacuum evaporation to form a coating, and then baked at 150°C for 30 minutes to cure and obtain a fluorine-free anti-fingerprint coating.

[0032] Example 4 Two parts of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), ten parts of the multiple trimethoxy-terminated silane compounds C1 obtained in Synthesis Example (4), five parts of hexadecyltrimethoxysilane, and 23 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was deposited on a glass substrate by vacuum evaporation to form a coating, and then baked at 150°C for 30 minutes to cure and obtain a fluorine-free anti-fingerprint coating.

[0033] Example 5 Two parts of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), ten parts of the multiple trimethoxy-terminated silane compounds D1 obtained in Synthesis Example (5), five parts of hexadecyltrimethoxysilane, and 23 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was deposited on a glass substrate by vacuum evaporation to form a coating, and then cured by baking at 150°C for 30 minutes to obtain a fluorine-free anti-fingerprint coating.

[0034] Example 6 Two parts of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), 10 parts of the multiple trimethoxy-terminated silane compounds E obtained in Synthesis Example (6), 5 parts of hexadecyltrimethoxysilane, and 23 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was then deposited on a glass substrate by vacuum evaporation to form a coating, and then cured by baking at 150°C for 30 minutes to obtain a fluorine-free anti-fingerprint coating.

[0035] Comparative Example 1 Two parts (by weight, the same below) of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), 10 parts of the silane compound F obtained in Synthesis Example (7), 5 parts of hexadecyltrimethoxysilane, and 23 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was deposited on a glass substrate by vacuum evaporation to form a coating, and then baked at 150°C for 30min to cure and obtain a fluorine-free anti-fingerprint coating.

[0036] Comparative Example 2 Two parts of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), 10 parts of the multiple trimethoxy-terminated silane compounds G obtained in Synthesis Example (8), 5 parts of hexadecyltrimethoxysilane, and 23 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was deposited on a glass substrate by vacuum evaporation to form a coating, and then baked at 150°C for 30 minutes to cure and obtain a fluorine-free anti-fingerprint coating.

[0037] Comparative Example 3 Two parts of the trimethoxy-terminated polysiloxane obtained in Synthesis Example (1), 10 parts of the silane compound H obtained in Synthesis Example (9), 5 parts of hexadecyltrimethoxysilane, and 23 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was then deposited on a glass substrate by vacuum evaporation to form a coating, and then baked at 150°C for 30min to cure, thus obtaining a fluorine-free anti-fingerprint coating.

[0038] Comparative Example 4 Take 10 parts of silane compound A obtained in synthesis example (2), 5 parts of hexadecyltrimethoxysilane, and 25 parts of ethyl acetate and mix them evenly to obtain a fluorine-free anti-fingerprint agent. Take 0.5g of the fluorine-free anti-fingerprint agent prepared above and add it dropwise into a crucible to prepare a pill. Deposit the pill onto a glass substrate by vacuum evaporation to form a coating, and then bake it at 150°C for 30min to cure it to obtain a fluorine-free anti-fingerprint coating.

[0039] Comparative Example 5 Two parts of the trimethoxy-terminated polysiloxane obtained in synthesis example (1), five parts of hexadecyltrimethoxysilane, and 33 parts of ethyl acetate were mixed evenly to obtain a fluorine-free anti-fingerprint agent. 0.5 g of the fluorine-free anti-fingerprint agent prepared above was added dropwise to a crucible to prepare a pellet. The pellet was then deposited onto a glass substrate by vacuum evaporation to form a coating, which was then cured at 150°C for 30 min to obtain a fluorine-free anti-fingerprint coating. The performance of the fluorine-free anti-fingerprint coatings prepared in the above examples and comparative examples was measured using the following methods, and the results are shown in Table 1 below.

[0040] (1) Contact angle test: The contact angle of the surface treatment layer with water was measured using a contact angle measuring instrument (XHS-CAZ1, Shenzhen Xinhengsen Instrument Equipment Co., Ltd.).

[0041] (2) Abrasion resistance test: The water contact angle of the surface treatment layer after abrasion was evaluated using a multi-functional abrasion tester (HG-9600, Dongguan Huaguo Precision Instrument Co., Ltd.) under the following conditions: (clean cloth, 1kg load, 1×1 grinding head, 1000 rounds). (3) Pencil hardness test (750g load) and marker line test. The marker line test is divided into four levels. A: Complete contraction; B: Partial contraction; C: Contraction; D: No contraction Table 1. Properties of the films formed after curing in Examples 1-6 and Comparative Examples 1-3

[0042] Table 1 illustrates that, compared to Comparative Examples 1-5, the polysiloxane segments in Examples 1-6 significantly improve the anti-fingerprint and anti-fouling properties of the coating. Multiple trimethoxy-terminated silane compounds enhance the pencil hardness of the coating, while long-chain alkylsiloxanes improve some abrasion resistance. These results demonstrate that the fluorine-free anti-fingerprint agent developed in this invention provides excellent waterproof, oil-proof, and abrasion-resistant properties for the coating.

[0043] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. A fluorine-free anti-fingerprint agent composition, characterized in that, The fluorine-free anti-fingerprint agent composition comprises, by weight percentage: 1% to 10% of a trimethoxy-terminated polydimethylsiloxane; 15% to 35% of a silane compound having multiple trimethoxy-terminated ends; 10% to 25% of a long-chain alkyltrimethoxysilane compound; and 50% to 65% of a solvent.

2. The fluorine-free anti-fingerprint agent composition and its preparation method according to claim 1, characterized in that, The trimethoxy-terminated polydimethylsiloxane is prepared by reacting trimethoxysilane with a single-terminated hydrogen-containing silicone oil, wherein the single-terminated hydrogen-containing silicone oil has a molecular weight of 2000-10000 g / mol.

3. The fluorine-free anti-fingerprint agent composition according to claim 1, characterized in that, The silane compound with multiple trimethoxy-terminated ends is the product of the reaction of a compound containing multiple hydroxyl groups, a compound containing multiple amino groups, or a compound containing both hydroxyl and amino groups with isocyanate-propyltrimethoxysilane.

4. The fluorine-free anti-fingerprint agent composition according to claim 3, characterized in that, The compound containing multiple hydroxyl groups or multiple amino groups or multiple compounds containing both hydroxyl and amino groups are selected from at least one of pentaerythritol, dipentaerythritol, polyester polyol, polyethyleneimine, tris(hydroxymethyl)aminomethane, serine, 1,3-diamino-2-hydroxypropane, and 1,3-bis[tris(hydroxymethyl)methylamino]propane, or are products of the reaction of the above compounds with diisocyanates or polycyanates.

5. The fluorine-free anti-fingerprint agent composition according to claim 4, characterized in that, The molar ratio of a compound containing multiple hydroxyl groups or multiple amino groups or multiple compounds containing both hydroxyl and amino groups to isocyanate-propyltrimethoxysilane is 1:3.0~10; the reaction temperature is 60-120℃.

6. The fluorine-free anti-fingerprint agent composition according to claim 1, characterized in that, The long-chain alkyltrimethoxysilane compound is dodecyltrimethoxysilane or higher long-chain trimethoxysilane compound.

7. The fluorine-free anti-fingerprint agent composition according to claim 1, characterized in that, The catalyst used in the reaction process is at least one of dibutyltin dilaurate, dioctyltin dilaurate, and stannous octoate.

8. The use of the fluorine-free anti-fingerprint composition according to any one of claims 1-7 in the preparation of an anti-fingerprint coating, characterized in that, The composition is coated onto the surface of a substrate and cured to form an anti-fingerprint coating.

9. The application according to claim 8, characterized in that, The curing method is heat curing; the heat curing temperature is 80-150℃, and the time is 20-60 min.

10. The application according to claim 8, characterized in that, The substrate can be any one of glass, metal, ceramic or plastic.

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