A kind of slippery anti-fingerprint liquid and preparation method thereof

Abstract

The present application relates to the technical field of anti-fingerprint materials, and specifically provides a smooth anti-fingerprint liquid and a preparation method thereof. The smooth anti-fingerprint liquid, based on 100% by weight, is composed of 99-99.999% fluorine-containing diluent and 0.001-1% main agent; the main agent is composed of a perfluoropolyether silane coupling agent and a structure of Me3SiO(SiOMeR f ) a (SiOMeR 1 ) b (SiOMeR 2 ) c The polyfluorosiloxane of SiMe3 is composed of 5-100:1 by weight, wherein R f represents a perfluoropolyether segment or a C8-C20 perfluoroalkyl segment, R 1 is selected from C1-C12 alkyl, chlorine-substituted C3-C6 alkyl or C6-C12 aromatic group, R 2 The structure is ‑CH2CH2Si(OR 3 )3, R 3 The anti-fingerprint liquid of the present application has good slippery properties after forming a film on a substrate such as glass, and has little effect on anti-fingerprint and wear resistance.

Description

Technical Field

[0001] The present application relates to the technical field of anti-fingerprint materials, and in particular to a slippery anti-fingerprint liquid and a preparation method thereof. Background Art

[0002] In order to improve the anti-fingerprint and anti-fouling properties of materials such as glass, a nano-scale film is usually applied by spraying anti-fingerprint liquid. Anti-fingerprint liquid is generally composed of a long-chain fluoroalkyl silane coupling agent or a perfluoropolyether silane coupling agent as the main agent, and is diluted with a fluorine diluent. The largest application of anti-fingerprint liquid is mobile phone glass screens, mobile phone glass films, tablet computer glass screens, etc. The main performance indicators of anti-fingerprint liquid are: (1) extremely low surface tension, good hydrophobic and oleophobic effects, providing anti-fingerprint and anti-fouling effects; (2) good wear resistance, long-lasting anti-fingerprint effect; (3) low dynamic friction coefficient, high smoothness, etc.

[0003] The prior art discloses the structures of various long-chain fluoroalkyl silane coupling agents or perfluoropolyether silane coupling agents, mainly adjusting the long-chain fluoroalkyl or perfluoropolyether structure to achieve better anti-fingerprint, smoothness and other properties. Another modification method is to introduce two or more alkoxysilyl structures into a long-chain fluoroalkyl silane coupling agent or perfluoropolyether silane coupling agent to improve adhesion to substrates such as glass.

[0004] Theoretically, when long-chain fluoroalkyl silane coupling agents or perfluoropolyether silane coupling agents are hydrolyzed and condensed on the surface of substrates such as glass, after the three alkoxy groups are hydrolyzed, one of the alkoxy groups is connected to the substrate, and the remaining two alkoxy groups are condensed with adjacent alkoxy groups, thereby forming a nano-scale film with a thickness of a single molecular layer. However, in reality, this situation is difficult to achieve, resulting in poor anti-fingerprint, wear resistance, and smoothness properties.

[0005] The inventors found that various anti-fingerprint liquids have been reported in the prior art, but they mainly focus on anti-fingerprint performance and pay less attention to smoothness. Summary of the Invention

[0006] In order to solve the technical problem of insufficient slipperiness of anti-fingerprint liquid in the prior art, the present application provides a slippery anti-fingerprint liquid and a preparation method thereof.

[0007] This application adopts the following technical solutions:

[0008] A slippery anti-fingerprint liquid, which is composed of 99-99.999% fluorine-containing diluent and 0.001-1% main agent based on 100% by weight;

[0009] The main agent is composed of a perfluoropolyether silane coupling agent and a polyfluorosilicone represented by the following formula (1) in a weight ratio of 5-100:1.

[0010] Me3SiO(SiOMeR f ) a (SiOMeR 1 ) b (SiOMeR 2 ) c SiMe3(1)

[0011] Among them, R f represents a perfluoropolyether segment or a C8-C20 perfluoroalkyl segment, R 1 is selected from C1-C12 alkyl, chlorine-substituted C3-C6 alkyl or C6-C12 aromatic group, R 2 The structure is -CH2CH2Si(OR 3 )3, R 3 Selected from methyl or ethyl, Me represents methyl, a=10-100, b=3-10, c=3-8.

[0012] Preferably, the fluorine-containing diluent is selected from one or a combination of perfluorohexane, perfluoroheptane, perfluorooctane, hexafluoropropylene trimer, methyl nonafluorobutyl ether, ethyl nonafluorobutyl ether, perfluoropentane, perfluorohexane, ethyl perfluorobutyl ether and ethyl nonafluorobutyl ether.

[0013] Preferably, the perfluoropolyether silane coupling agent is selected from PFPECH2OCH2CH2CH2Si(OCH3)3, PFPECH2OCH2CH2CH[CH2CH2Si(OCH3)3]2, PFPECH2OCH[CH2CH2Si(OCH3)3]2 or PFPECH2OCH2CH2OCH2CH2CH2Si(OCH3)3, wherein PFPE represents a perfluoropolyether segment.

[0014] Preferably, the weight ratio of the perfluoropolyether silane coupling agent to the polyfluorosiloxane is 10-100:1.

[0015] Preferably, the structure of the perfluoropolyether segment is selected from one of a D-type perfluoropolyether segment, a Z-type perfluoropolyether segment, a K-type perfluoropolyether segment and a Y-type perfluoropolyether segment.

[0016] Preferably, the structure of the C8-C20 perfluoroalkyl segment is CF3(CF2) n CH2CH2-, n=5-17.

[0017] Preferably, the values of a, b, and c satisfy: 0.7≤a / (a+b+c)≤0.9.

[0018] Preferably, the values of a, b, and c satisfy: 0.05≤b / (a+b+c)≤0.2.

[0019] Preferably, the values of a, b, and c satisfy: 0.03≤c / (a+b+c)≤0.1.

[0020] The method for preparing the slippery anti-fingerprint liquid according to any of the above technical solutions comprises adding the perfluoropolyether silane coupling agent and the polyfluorosiloxane to the fluorine-containing diluent and stirring and mixing them uniformly;

[0021] or,

[0022] The perfluoropolyether silane coupling agent and the polyfluorosilicone are added to a portion of the fluorine-containing diluent, mixed evenly, and then mixed evenly with the remaining fluorine-containing diluent before use.

[0023] In summary, this application has the following beneficial effects:

[0024] 1. Polysiloxane has better slip properties than perfluoropolyether, but its anti-fingerprint performance is worse than perfluoropolyether. This application adds polyfluorosiloxane to the anti-fingerprint liquid. By designing the polyfluorosiloxane structure, the anti-fingerprint liquid obtained has good anti-fingerprint performance, slipperiness, and wear resistance.

[0025] 2. The polyfluorosiloxane structure of this application contains a fluoroalkyl structure or a fluoroether structure, an organic group, and an alkoxysilyl group. The fluoroalkyl structure or the fluoroether structure provides good compatibility with the perfluoropolyether silane coupling agent and anti-fingerprint properties, the organic group provides good slip properties, and the alkoxysilyl group provides good adhesion to the substrate. Therefore, the slippery anti-fingerprint liquid of this application has better slip properties than good anti-fingerprint performance, while having little effect on wear resistance. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below.

[0027] Throughout this specification, unless otherwise specified, the terms used herein should be understood as having the same meaning as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the event of any conflict, the present specification shall take precedence.

[0028] In one aspect, the present application provides a slippery anti-fingerprint liquid, which is composed of 99-99.999% fluorine-containing diluent and 0.001-1% main agent, based on 100% by weight;

[0029] The main agent is composed of a perfluoropolyether silane coupling agent and a polyfluorosilicone represented by the following formula (1) in a weight ratio of 5-100:1.

[0030] Me3SiO(SiOMeR f) a (SiOMeR 1 ) b (SiOMeR 2 ) c SiMe3(1)

[0031] Among them, R f represents a perfluoropolyether segment or a C8-C20 perfluoroalkyl segment, R 1 is selected from C1-C12 alkyl, chlorine-substituted C3-C6 alkyl or C6-C12 aromatic group, R 2 The structure is -CH2CH2Si(OR 3 )3, R 3 Selected from methyl or ethyl, Me represents methyl, a=10-100, b=3-10, c=3-8.

[0032] In the prior art, the main agent of the anti-fingerprint liquid (the component remaining after the diluent evaporates and exerts the anti-fingerprint effect) generally contains a perfluoropolyether silane coupling agent. However, since the slipperiness of the perfluoropolyether structure is not high enough, the slipperiness of the anti-fingerprint coating is not enough. Polysiloxane has better slipperiness than perfluoropolyether, but directly adding polysiloxane to the anti-fingerprint liquid will lead to deterioration of the anti-fingerprint performance, wear resistance, etc. The present application designs the polysiloxane structure and introduces a perfluoropolyether segment and an alkoxysilyl group into the side chain. The perfluoropolyether segment provides compatibility and anti-fingerprint properties with the perfluoropolyether silane coupling agent, and the alkoxysilyl group provides good bonding with the substrate. Therefore, the anti-fingerprint liquid of the present application has better slipperiness and better wear resistance while maintaining good anti-fingerprint performance.

[0033] In the present application, the polyfluorosilicone represented by formula (1) can be prepared from hydrogen-containing silicone oil Me3SiO(SiOMeH) a+b+c SiMe3 and R f The corresponding perfluoropolyether olefin group, R 1 The corresponding olefin, substituted olefin or aromatic hydrocarbon, R 2 The corresponding CH2=CH(OR 3 Alternatively, polyfluorosilicone can be obtained by reacting hydrogenated silicone oil Me3SiO(SiOMeH) a+c (SiOMeR 1 ) b SiMe3 and R f The corresponding perfluoropolyether olefin group, R 2 The corresponding CH2=CH(OR 3 )3 is obtained by hydrosilylation reaction.

[0034] In the present application, further, the slippery anti-fingerprint liquid is composed of 99.2-99.99% fluorine-containing diluent and 0.01-0.8% main agent, and further composed of 99.4-99.9% fluorine-containing diluent and 0.1-0.6% main agent, and for example, the weight percentage of the main agent can be any value among 0.1%, 0.12%, 0.15%, 0.18%, 0.2%, 0.22%, 0.25%, 0.27%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, etc. If the concentration of the main agent is too low, the anti-fingerprint effect cannot be exerted or the anti-fingerprint performance is poor. If the concentration of the main agent is too high, the cost is too high and the performance improvement is not obvious.

[0035] The fluorinated diluent can be used to dilute the main agent and also protect the main agent from premature reaction with moisture, which may cause the main agent to fail. In a preferred embodiment of the present application, the fluorinated diluent is not particularly limited and can be selected from one or a combination of perfluorohexane, perfluoroheptane, perfluorooctane, hexafluoropropylene trimer, methyl nonafluorobutyl ether, ethyl nonafluorobutyl ether, perfluoropentane, perfluorohexane, ethyl perfluorobutyl ether, and ethyl nonafluorobutyl ether. It can also be selected from perfluorocyclic ethers, such as FC-77.

[0036] In this application, the perfluoropolyether silane coupling agent is one of the main components of the main agent, which imparts good anti-fingerprint performance, wear resistance and certain smoothness. In the present application, the perfluoropolyether silane coupling agent is not particularly limited and can be any one in the prior art, for example, it can be an existing commercially available product, such as Shin-Etsu's X-71-197, Daikin UD509, etc., or it can also be selected from PFPECH2OCH2CH2CH2Si(OCH3)3, PFPECH2OCH2CH2CH[CH2CH2Si(OCH3)3]2, PFPECH2OCH[CH2CH2Si(OCH3)3]2 or PFPECH2OCH2CH2OCH2CH2CH2Si(OCH3)3, wherein PFPE represents a perfluoropolyether segment, for example, it can be any one of a D-type perfluoropolyether segment, a Z-type perfluoropolyether segment, a K-type perfluoropolyether segment and a Y-type perfluoropolyether segment, or a perfluoropolyether segment of other structures, and the average molecular weight of the perfluoropolyether segment can be 500-2000. The structure of the D-type perfluoropolyether segment can be CF3CF2CF2O (CF2CF2CF2O) m CF2CF2-, the structure of the Z-type perfluoropolyether segment can be CF3(C2F4O) x (CF2O) y The structure of CF2-, K-type perfluoropolyether segment can be CF3CF2CF2O (CF(CF3)CF2O) nCF(CF3)-, the structure of the Y-type perfluoropolyether segment can be CF3O(C3F6O) p (CF2O) q CF2-.

[0037] In a preferred embodiment of the present application, the weight ratio of the perfluoropolyether silane coupling agent to the polyfluorosilicone is 10-100:1. Further, the weight ratio can be 10-50:1. For example, the weight ratio can be any value of 10:1, 15:1, 18:1, 20:1, 23:1, 25:1, 27:1, 30:1, 33:1, 35:1, 40:1, 45:1, 50:1, etc.

[0038] In a preferred embodiment of the present application, the structure of the perfluoropolyether segment is selected from one of a D-type perfluoropolyether segment, a Z-type perfluoropolyether segment, a K-type perfluoropolyether segment, and a Y-type perfluoropolyether segment, or a perfluoropolyether segment of another structure. The structures of the D-type perfluoropolyether segment, the Z-type perfluoropolyether segment, the K-type perfluoropolyether segment, and the Y-type perfluoropolyether segment are as described above, respectively.

[0039] In a preferred embodiment of the present application, the structure of the C8-C20 perfluoroalkyl segment is CF3(CF2) n CH2CH2-, n = 5-17. The straight-chain perfluoroalkyl segment has better anti-fingerprint performance.

[0040] In a preferred embodiment of the present application, the values of a, b, and c satisfy the following: 0.7 ≤ a / (a+b+c) ≤ 0.9. When the values of a, b, and c fall within this range, the anti-fingerprint performance of the anti-fingerprint liquid is substantially unaffected. Specifically, the value of a / (a+b+c) can be any of 0.7, 0.72, 0.74, 0.75, 0.76, 0.77, 0.78, 0.8, 0.82, 0.83, 0.84, 0.86, 0.88, and 0.9, among others.

[0041] In a preferred embodiment of the present application, the values of a, b, and c satisfy the following: 0.05 ≤ b / (a+b+c) ≤ 0.2. When the values of a, b, and c fall within this range, the anti-fingerprint liquid's slippery properties are significantly improved. Specifically, the value of b / (a+b+c) can be any of 0.05, 0.07, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, and 0.2.

[0042] In a preferred embodiment of the present application, the values of a, b, and c satisfy the following: 0.03 ≤ c / (a+b+c) ≤ 0.1. When the values of a, b, and c fall within the above ranges, the wear resistance of the anti-fingerprint liquid is minimally affected or substantially unaffected. Specifically, the value of c / (a+b+c) can be any of 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, 0.06, 0.065, 0.07, 0.075, 0.08, 0.085, 0.09, 0.095, 0.1, and the like.

[0043] On the other hand, the present application provides a method for preparing the slippery anti-fingerprint liquid according to any of the above technical solutions, comprising adding a perfluoropolyether silane coupling agent and a polyfluorosiloxane to a fluorine-containing diluent and stirring and mixing them uniformly;

[0044] or,

[0045] Add perfluoropolyether silane coupling agent and polyfluorosilicone to part of the fluorine-containing diluent, mix evenly, and then mix evenly with the remaining fluorine-containing diluent before use.

[0046] The technical solution of the present application is described in detail below with reference to preparation examples, embodiments and comparative examples.

[0047] Preparation Example 1-4 Preparation of polyfluorosilicone

[0048] Preparation Example 1

[0049] 0.01 mol hydrogenated silicone oil Me3SiO(SiOMeH) 35.8 (SiOMe2) 4.1 SiMe3 and 0.33 mol perfluoropolyether allyl ether F(CFCF3CF2O) n CFCF3CH2OCH2CH=CH2 (average molecular weight 2700) was added to the reaction vessel, the temperature was raised to 90°C under nitrogen protection, Karstedt catalyst (15 ppm based on Pt amount) was added, the reaction was maintained at 130-135°C for 5 hours, 0.04 mol of vinyltrimethoxysilane was continued to be added, the reaction was continued at a constant temperature for 3 hours, the pressure was reduced to below -0.099 MPa to remove low boiling points, and the temperature was lowered to obtain polyfluorosilicone.

[0050] Preparation Example 2

[0051] 0.01 mol hydrogenated silicone oil Me3SiO(SiOMeH) 40.8SiMe3 and 0.33 mol of the perfluoropolyether allyl ether in Preparation Example 1 were added to a reaction vessel, the temperature was raised to 90°C under nitrogen protection, Karstedt catalyst (15 ppm based on the amount of Pt) was added, and the reaction was maintained at 130-135°C for 5 hours. 0.04 mol of 1-dodecene was continued to be added, and the reaction was continued at a constant temperature for 4 hours. 0.04 mol of vinyltrimethoxysilane and Karstedt catalyst (5 ppm based on the amount of Pt) were continued to be added, and the reaction was continued at a constant temperature for 3 hours. The pressure was reduced to below -0.099 MPa to remove low boiling points, and the temperature was lowered to obtain polyfluorosilicone.

[0052] Preparation Example 3

[0053] 0.01 mol hydrogenated silicone oil Me3SiO(SiOMeH) 36.5 (SiOMeR 4 ) 4.3 SiMe3(R 4 3-chloropropyl) and 0.33 mol of the perfluoropolyether allyl ether of Preparation Example 1 were added to a reaction vessel, the temperature was raised to 90° C. under nitrogen protection, Karstedt catalyst (based on the amount of Pt, the addition amount was 15 ppm) was added, and the reaction was maintained at 130-135° C. for 5 hours. 0.04 mol of vinyltrimethoxysilane was continuously added, and the reaction was kept at this temperature for 3 hours. The pressure was reduced to below -0.099 MPa to remove low boiling points, and the temperature was lowered to obtain polyfluorosiloxane.

[0054] Preparation Example 4

[0055] 0.01 mol hydrogenated silicone oil Me3SiO(SiOMeH) 63.2 (SiOMeR 5 ) 6.9 SiMe3(R 5 3-chloropropyl) and 0.56 mol of the perfluoropolyether allyl ether of Preparation Example 1 were added to a reaction vessel, the temperature was raised to 90° C. under nitrogen protection, Karstedt catalyst (based on the amount of Pt, the addition amount was 15 ppm), the temperature was maintained at 130-135° C. for 6 hours, 0.09 mol of vinyltrimethoxysilane was continuously added, the reaction was continued at a constant temperature for 3 hours, the pressure was reduced to below -0.099 MPa to remove low boiling points, and the temperature was lowered to obtain polyfluorosiloxane.

[0056] Example 1

[0057] Under nitrogen protection, 99.8 g of methyl nonafluorobutyl ether and 0.2 g of the main agent were mixed and stirred for 5 minutes to obtain an anti-fingerprint liquid.

[0058] The main agent is composed of perfluoropolyether silane coupling agent PFPECH2OCH2CH2CH2Si(OCH3)3 (average molecular weight 3640) and polyfluorosilicone prepared in Preparation Example 1 in a weight ratio of 20:1.

[0059] Example 2

[0060] The difference between Example 2 and Example 1 is that in Example 1, the polyfluorosilicone in Preparation Example 1 is replaced by an equal weight of polyfluorosilicone in Preparation Example 2. The remaining steps remain unchanged.

[0061] Example 3

[0062] The difference between Example 3 and Example 1 is that in Example 1, the polyfluorosilicone in Preparation Example 1 is replaced by an equal weight of polyfluorosilicone in Preparation Example 3. The remaining steps remain unchanged.

[0063] Example 4

[0064] The difference between Example 4 and Example 1 is that in Example 1, the polyfluorosilicone in Preparation Example 1 is replaced by an equal weight of polyfluorosilicone in Preparation Example 4. The remaining steps remain unchanged.

[0065] Example 5

[0066] The difference between Example 5 and Example 3 is that the main agent is composed of perfluoropolyether silane coupling agent and polyfluorosiloxane in a weight ratio of 20:1 adjusted to 10:1. The other steps remain unchanged.

[0067] Example 6

[0068] The difference between Example 6 and Example 3 is that the main agent is composed of perfluoropolyether silane coupling agent and polyfluorosiloxane in a weight ratio of 20:1 adjusted to 50:1. The other steps remain unchanged.

[0069] Example 7

[0070] The difference between Example 7 and Example 3 is that the main agent is composed of perfluoropolyether silane coupling agent and polyfluorosiloxane in a weight ratio of 20:1 adjusted to 90:1. The other steps remain unchanged.

[0071] Comparative Example 1

[0072] The difference between Comparative Example 1 and Example 1 is that in Example 1, the main agent is replaced by an equal weight of the polyfluorosilicone prepared in Preparation Example 3. The remaining steps remain unchanged.

[0073] Comparative Example 2

[0074] The difference between Comparative Example 2 and Example 1 is that in Example 1, the main agent is replaced by an equal weight of the polyfluorosilicone prepared in Preparation Example 4. The remaining steps remain unchanged.

[0075] Comparative Example 3

[0076] The difference between Comparative Example 3 and Example 1 is that in Example 1, the polyfluorosilicone in Preparation Example 1 is replaced by an equal weight of the perfluoropolyether silane coupling agent in Example 1. The remaining steps remain unchanged.

[0077] Example 8

[0078] Under nitrogen protection, 99.85 g of perfluorohexane and 0.15 g of the main agent were mixed and stirred for 5 minutes to obtain an anti-fingerprint liquid.

[0079] The main agent is composed of the perfluoropolyether silane coupling agent of Example 1 and the polyfluorosiloxane of Preparation Example 3 in a weight ratio of 25:1.

[0080] Example 9

[0081] Under nitrogen protection, 99.75 g of perfluorohexane and 0.25 g of the main agent were mixed and stirred for 5 minutes to obtain an anti-fingerprint liquid.

[0082] The main agent is composed of the perfluoropolyether silane coupling agent of Example 1 and the polyfluorosiloxane of Preparation Example 3 in a weight ratio of 25:1.

[0083] Comparative Example 4

[0084] The difference between Comparative Example 4 and Example 9 is that in Example 9, the main agent is replaced by an equal weight of the polyfluorosilicone prepared in Preparation Example 3. The remaining steps remain unchanged.

[0085] Comparative Example 5

[0086] The difference between Comparative Example 5 and Example 9 is that in Example 9, the main agent is replaced by an equal weight of the perfluoropolyether silane coupling agent of Example 1. The remaining steps remain unchanged.

[0087] Performance Testing

[0088] The anti-fingerprint liquids in Examples 1-9 and Comparative Examples 1-5 were directly sprayed onto a clean glass cover plate, heated in a 130° C. ring oven for 20 minutes, taken out, and placed at room temperature for 24 hours.

[0089] Oil repellency: Place a drop of n-hexadecane on the treated glass cover and measure the contact angle using a water drop angle meter. Test at five locations, including the center and periphery of the glass cover, and average the results. The higher the n-hexadecane contact angle, the better the oil repellency.

[0090] Anti-fingerprint level: Use your index finger to gently press the treated glass cover for 5 seconds, then remove your finger for 3 seconds to observe the fingerprint residue: Level 5 - no trace; Level 4 - slight trace, which can be easily wiped off with a finger; Level 3 - slight trace, which cannot be wiped off with a finger; Level 2 - obvious trace; Level 1 - very obvious trace.

[0091] Smoothness: Use a dynamic friction coefficient tester to test the dynamic friction coefficient of the treated glass cover surface. The lower the dynamic friction coefficient, the better the smoothness.

[0092] Abrasion resistance: Tested using an abrasion tester. 1 kg load, 0000# steel wool, contact area 10 mm x 10 mm, frequency 60 times / minute. After 3000 friction cycles, the test is considered passed if the water drop angle reaches 100° or above; otherwise, the test is considered failed.

[0093] The results are shown in Table 1.

[0094] Table 1

[0095] n-Hexadecane contact angle / ° Anti-fingerprint level Dynamic friction coefficient wear resistance Example 1 76 5 0.029 pass Example 2 71 5 0.027 pass Example 3 74 5 0.024 pass Example 4 76 5 0.023 pass Example 5 72 4 0.022 pass Example 6 76 5 0.027 pass Example 7 77 5 0.031 pass Comparative Example 1 63 3 0.021 Failed Comparative Example 2 65 3 0.020 Failed Comparative Example 3 78 5 0.033 pass Example 8 72 4 0.025 pass Example 9 76 5 0.026 pass Comparative Example 4 67 4 0.022 Failed Comparative Example 5 79 5 0.035 pass

[0096] From the results in Table 1, it can be seen that the anti-fingerprint liquid of the present application has a lower dynamic friction coefficient and better slippery performance. Moreover, although the contact angle of n-hexadecane is reduced to a certain extent, it has little effect on the anti-fingerprint performance.

[0097] 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 non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A smooth anti-fingerprint liquid, characterized in that: Based on 100% by weight, it is composed of 99.4-99.9% fluorine-containing diluent and 0.1-0.6% main agent; The main agent is composed of a perfluoropolyether silane coupling agent and a polyfluorosilicone represented by the following formula (1) in a weight ratio of 5-100:

1. Me3SiO(SiOMeR f ) a (SiOMeR 1 ) b (SiOMeR 2 ) c SiMe3 (1) Among them, R f represents a perfluoropolyether segment or a C8-C20 perfluoroalkyl segment, R 1 is selected from C1-C12 alkyl, chlorine-substituted C3-C6 alkyl or C6-C12 aromatic group, R 2 The structure is -CH2CH2Si(OR 3 )3, R 3 Selected from methyl or ethyl, Me represents methyl, a=10-100, b=3-10, c=3-8.

2. The slippery anti-fingerprint liquid according to claim 1, characterized in that: The fluorine-containing diluent is selected from one or a combination of perfluorohexane, perfluoroheptane, perfluorooctane, hexafluoropropylene trimer, methyl nonafluorobutyl ether, ethyl nonafluorobutyl ether, and perfluoropentane.

3. The slippery anti-fingerprint liquid according to claim 1, characterized in that: The perfluoropolyether silane coupling agent is selected from PFPECH2OCH2CH2CH2Si(OCH3)3, PFPECH2OCH2CH2CH[CH2CH2Si(OCH3)3]2, PFPECH2OCH[CH2CH2Si(OCH3)3]2 or PFPECH2OCH2CH2OCH2CH2CH2Si(OCH3)3, wherein PFPE represents a perfluoropolyether segment.

4. The slippery anti-fingerprint liquid according to claim 1, characterized in that: The weight ratio of the perfluoropolyether silane coupling agent to the polyfluorosiloxane is 10-100:

1.

5. The slippery anti-fingerprint liquid according to claim 1, characterized in that: The structure of the perfluoropolyether segment is selected from one of a D-type perfluoropolyether segment, a Z-type perfluoropolyether segment, a K-type perfluoropolyether segment and a Y-type perfluoropolyether segment.

6. The slippery anti-fingerprint liquid according to claim 1, characterized in that: The structure of the C8-C20 perfluoroalkyl segment is CF3(CF2) n CH2CH2-, n=5-17.

7. The slippery anti-fingerprint liquid according to claim 1, characterized in that: The values of a, b, and c satisfy: 0.7≤a / (a+b+c)≤0.

9.

8. The slippery anti-fingerprint liquid according to claim 1, characterized in that: The values of a, b, and c satisfy: 0.05≤b / (a+b+c)≤0.

2.

9. The slippery anti-fingerprint liquid according to claim 1, characterized in that: The values of a, b, and c satisfy: 0.03≤c / (a+b+c)≤0.

1.

10. The method for preparing the slippery anti-fingerprint liquid according to any one of claims 1 to 9, characterized in that: Adding the perfluoropolyether silane coupling agent and the polyfluorosiloxane into the fluorine-containing diluent, stirring and mixing uniformly; or, The perfluoropolyether silane coupling agent and the polyfluorosilicone are added to a portion of the fluorine-containing diluent, mixed evenly, and then mixed evenly with the remaining fluorine-containing diluent before use.