CN114539915A - Low-shrinkage high-hardness flexible fingerprint hardening prevention coating and preparation method thereof - Google Patents

Low-shrinkage high-hardness flexible fingerprint hardening prevention coating and preparation method thereof Download PDF

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CN114539915A
CN114539915A CN202210116118.5A CN202210116118A CN114539915A CN 114539915 A CN114539915 A CN 114539915A CN 202210116118 A CN202210116118 A CN 202210116118A CN 114539915 A CN114539915 A CN 114539915A
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fingerprint
coating
polysilsesquioxane
slurry
epoxy
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卢岳
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Xiamen Sandesen Technology Co ltd
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Xiamen Sandesen Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20—Diluents or solvents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic

Abstract

The hardened coating is mainly prepared from polysilsesquioxane containing epoxy functional groups, an epoxy monomer, an anti-fingerprint modifier, a photoinitiator and a solvent, wherein the epoxy monomer is selected from at least one of 3-ethyl-3-epoxypropane methanol and 3,3' - (oxydimethylene) bis (3-ethyl) oxetane. The invention introduces the epoxy monomer and the anti-fingerprint modifier into the hardened coating, the epoxy monomer can be used as the reactive diluent of polysilsesquioxane with epoxy functional groups and the good solvent of the anti-fingerprint modifier, the key point that the anti-fingerprint modifier can be added into the formula of the hardened coating and can react with the main components of the hardened coating for curing in one step is realized, the hardened coating has the characteristic of anti-fingerprint, and the process complexity that the hardened coating needs to be subjected to anti-fingerprint modification by adopting a vacuum plasma treatment process in the traditional technology is solved.

Description

Low-shrinkage high-hardness flexible fingerprint hardening prevention coating and preparation method thereof
Technical Field
The invention relates to the field of screen protection, in particular to a low-shrinkage high-hardness flexible fingerprint hardening prevention coating and a preparation method thereof.
Background
The outermost cover plate of the flexible display screen (folding screen, scroll screen, etc.) is usually made of plastic: colorless Polyimide (CPI), polyethylene terephthalate (PET), and the like, are not directly used because they have low hardness, poor scratch resistance, and no fingerprint resistance. Therefore, the industry usually applies a colorless and transparent Hardening Coating (HC) on the surface of the plastic cover plate to meet the use requirement of the flexible screen.
The main component of a common hardened coating is Ultraviolet (UV) curable organic resin (usually acrylate), which can solve the above problems, but the shrinkage rate of the acrylate resin after UV curing is too large, so that the coating cannot be thick (usually less than 10 μm), the plastic substrate and the Optical Clear Adhesive (OCA) of the lower layer cannot be sufficiently protected, the plastic substrate or the OCA is always damaged during a pencil hardness test, and the overall pencil hardness of the cover plate is low. Moreover, the pencil hardness of the hardened coating per se is only 4-7H (JIS K5400), the pencil hardness of the whole hardened coating coated on CPI or PET is only 4H at most, which is far lower than the hardness (9H) of glass, and the scratch resistance and the touch feel also have great promotion space.
On the other hand, in the prior art, the anti-fingerprint performance of the hardened coating is modified by coating the hardened coating and then carrying out anti-fingerprint treatment on the surface of the hardened coating, and the anti-fingerprint treatment method usually needs a vacuum plasma treatment process, cannot carry out roll-to-roll construction and is not suitable for large-scale industrial production.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a low-shrinkage, high-hardness, flexible and fingerprint hardening prevention coating with simple process and a preparation method thereof.
The first technical scheme provided by the invention is as follows:
the hardened coating is mainly prepared from polysilsesquioxane containing epoxy functional groups, an epoxy monomer, an anti-fingerprint modifier, a photoinitiator and a solvent, wherein the epoxy monomer is selected from at least one of 3-ethyl-3-epoxypropane methanol and 3,3' - (oxydimethylene) bis (3-ethyl) oxetane. The epoxy monomer can be used as a good solvent for an active diluent and an anti-fingerprint modifier of polysilsesquioxane with epoxy functional groups, and is a key point for realizing that the anti-fingerprint modifier can be added into a hardened coating formula and can react with a main component of the hardened coating in one step for curing; meanwhile, the epoxy monomer also has the effect of further reducing the curing shrinkage rate.
Further, the polysilsesquioxane containing epoxy functional groups is at least one selected from the group consisting of epoxycyclohexyl-cage polysilsesquioxane, glycidoxypropyl-cage polysilsesquioxane, epoxycyclohexyl-ladder polysilsesquioxane and glycidoxypropyl-ladder polysilsesquioxane. The polysilsesquioxane containing epoxy functional groups is selected as a main material, epoxy groups in the polysilsesquioxane containing epoxy functional groups are subjected to cationic UV curing reaction, the shrinkage rate of the polysilsesquioxane is much lower than that of carbon-carbon double bond free radical polymerization of an acrylate hardened coating, and therefore, a thicker (> 20 mu m) coating can be prepared without cracking and warping.
Further, the anti-fingerprint modifier is epoxy perfluoroalkane, such as 3- (perfluoro-n-octyl) propylene oxide, 3- (perfluoro-n-hexyl) propylene oxide, 3- (perfluoro-n-decyl) propylene oxide and the like. The anti-fingerprint modifier containing the epoxy functional group can participate in the UV curing reaction of polysilsesquioxane and epoxy monomer containing the epoxy functional group, and due to the characteristic of low surface tension, the anti-fingerprint modifier is enriched and hardened on the surface of the coating and plays a role in anti-fingerprint modification. The longer the carbon chain of the epoxy perfluoroalkane is, the more the number of fluorine atoms is, the more obvious the anti-fingerprint modification effect is, and the higher the water contact angle is. The anti-fingerprint modifier is reacted and cured to form firm chemical bond connection with the main resin, so that the wear-resistant steel wool has good wear resistance, the surface of 0000# steel wool has no scratch after 3000 times of wear resistance test (1000 g weight), and the water contact angle after grinding is more than 100 degrees.
Further, the photoinitiator is selected from at least one of onium salt type initiators, metallo-organic type initiators, and organosilane type initiators, such as diaryliodonium salt, triarylsulfonium salt, and η 6-cumeneiron (II) hexafluorophosphate.
Further, the solvent is at least one selected from 2-butanone, ethyl acetate and butyl acetate.
Furthermore, the weight of the polysilsesquioxane containing the epoxy functional group accounts for 20 wt% -80wt% of the total weight of the raw materials, the mass ratio of the epoxy monomer to the polysilsesquioxane containing the epoxy functional group is 2:8-5:5, the mass ratio of the fingerprint-resistant modifier to the sum of the polysilsesquioxane containing the epoxy functional group and the epoxy monomer is 1:100-5:100, the mass ratio of the photoinitiator to the sum of the polysilsesquioxane containing the epoxy functional group and the epoxy monomer is 1:100-5:100, and the balance is a solvent.
Furthermore, because the anti-fingerprint modifier is incompatible with the polysilsesquioxane and only compatible with the epoxy monomer, the mass ratio of the epoxy monomer to the anti-fingerprint modifier in the whole formula is not less than 5:1, and the uniformly mixed and non-whitish hardened coating slurry can be finally obtained.
The second technical scheme provided by the invention is as follows:
a preparation method of a low-shrinkage high-hardness flexible fingerprint hardening prevention coating comprises the following steps:
(1) adding polysilsesquioxane containing epoxy functional groups into a solvent, and uniformly stirring to obtain slurry A;
adding the anti-fingerprint modifier into the epoxy monomer, and uniformly stirring to obtain slurry B;
uniformly mixing the slurry A and the slurry B, and adding a photoinitiator to obtain HC slurry;
(2) and coating the HC slurry on the surface of the base material, drying the solvent, and carrying out UV curing to form a low-shrinkage, high-hardness, flexible and fingerprint-hardening-prevention coating on the surface of the base material.
In the preparation method, preferably, in the step (2), the drying temperature is 60-130 ℃; the UV curing is carried out in a nitrogen environment, and the radiation dose of the UV curing is 1000-2。
In the above production method, in the step (2), the coating method preferably includes any one of a roll coating method, a knife coating method, a dip coating method, a roll coating method, a spin coating method, and a slit coating method.
In the above production method, preferably, in the step (2), the substrate is at least one selected from a transparent polyimide substrate, a polyethylene terephthalate substrate, and polymethyl methacrylate.
Compared with the prior art, the invention has the advantages that:
(1) the invention introduces the epoxy monomer and the anti-fingerprint modifier into the hardened coating, the epoxy monomer can be used as the reactive diluent of polysilsesquioxane containing epoxy functional groups and the good solvent of the anti-fingerprint modifier, the key point that the anti-fingerprint modifier can be added into the formula of the hardened coating and can react with the main components of the hardened coating for curing in one step is realized, the hardened coating has the characteristic of anti-fingerprint, and the process complexity that the hardened coating needs to be subjected to anti-fingerprint modification by adopting a vacuum plasma treatment process in the traditional technology is solved.
(2) The UV curing type hardened coating obtained by taking polysilsesquioxane containing epoxy functional groups as a main body in the hardened coating has the characteristics of low shrinkage, high hardness and flexibility; meanwhile, the anti-fingerprint modifier is introduced into the hardened coating, so that the hardened coating has the characteristic of anti-fingerprint.
(3) The low-shrinkage high-hardness flexible fingerprint-resistant hardened coating disclosed by the invention is simple in preparation process, and the fingerprint-resistant modifier can be added into a hardened coating formula and reacts with the main components of the hardened coating in one step for curing, so that the production efficiency is greatly improved.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully and in detail with reference to the preferred embodiments, but the scope of the invention is not limited to the specific embodiments described below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
The test methods in the following examples were all tested according to the following test methods:
measurement of degree of warpage: cutting an HC-CPI film sample into a square of 10 multiplied by 10cm, placing the square on a marble platform without electrostatic adsorption influence, and measuring the highest distance between 4 corners of the sample and the platform by using a ruler, wherein the requirement of the industry standard is generally less than or equal to 8 mm.
Measuring pencil hardness: based on GB/T6739-. When scratches exceeding 3mm are found, the test is repeated with the pencil hardness lowered, and finally the pencil hardness of the sample is recorded as the maximum hardness that passes the test.
Measurement of Water contact Angle: based on the GB/T30693-2014 standard, the test is carried out by using a water contact angle measuring instrument.
Measurement of dynamic neck-in Performance: an HC-CPI film was cut into a rectangular sample of 20mm × 120mm, the sample was attached to a dynamic bending tester, an appropriate bending radius (1.5-3 mm) was selected, the HC side of the sample was folded inward in half, a dynamic bending test of 180 ° was performed 10 ten thousand times, whether or not a crack or fracture occurred in a bent portion was checked, and the evaluation was (good) if no crack or fracture occurred in the bent portion, and was (x) if crack or fracture occurred in the bent portion.
Example 1:
the low shrinkage, high hardness, flexible, anti-fingerprint hardening coating of this example was prepared primarily from 60% epoxycyclohexylethyl-caged polysilsesquioxane, 15% 3,3' - (oxybismethylene) bis (3-ethyl) oxetane, 3% 3- (perfluoro-n-octyl) propylene oxide, 2% triphenylhexafluoroantimonate, and 20% 2-butanone.
The preparation method of the low shrinkage, high hardness, flexible and fingerprint hardening prevention coating of the embodiment comprises the following steps:
(1) adding epoxy cyclohexyl ethyl-cage polysilsesquioxane into 2-butanone, and uniformly stirring to obtain slurry A;
adding 3- (perfluoro-n-octyl) epoxypropane into 3,3' - (oxybis-methylene) bis (3-ethyl) oxetane, and uniformly stirring to obtain slurry B;
uniformly mixing the slurry A and the slurry B, and adding a photoinitiator triphenyl hexafluoroantimonate to obtain HC slurry;
(2) the HC slurry was coated on a CPI film (available from Kolon Co., Kolon, Korea) having a thickness of 50 μm, and the HC slurry was coatedThe film after being charged is put into an oven at 80 ℃ for drying for 5 minutes and then is dried at 1500mJ/cm in a nitrogen environment2Photocuring was carried out under a UV lamp at a radiation dose to give a cured coating thickness of 25 μm for HC-CPI films.
Example 2:
the low shrinkage, high hardness, flexible, anti-fingerprint hardening coating of this example was prepared from 60% glycidoxypropyl cage polysilsesquioxane, 15% 3,3' - (oxybismethylene) bis (3-ethyl) oxetane, 3% 3- (perfluoro-n-octyl) propylene oxide, 2% triphenylhexafluoroantimonate, and 20% 2-butanone.
The preparation method of the low shrinkage, high hardness, flexible and fingerprint hardening prevention coating of the embodiment comprises the following steps:
(1) adding glycidyl ether oxypropyl-cage polysilsesquioxane into 2-butanone, and uniformly stirring to obtain slurry A;
adding 3- (perfluoro-n-octyl) epoxypropane into 3,3' - (oxybismethylene) bis (3-ethyl) oxetane, and uniformly stirring to obtain slurry B;
uniformly mixing the slurry A and the slurry B, and adding a photoinitiator triphenyl hexafluoroantimonate to obtain HC slurry;
(2) the HC slurry was applied to a CPI film (available from Kolon Co., Kolon, Korea) having a thickness of 50 μm, and the HC slurry-applied film was dried in an oven at 130 ℃ for 5 minutes and then placed at 1500mJ/cm in a nitrogen atmosphere2Photocuring was carried out under a UV lamp at a radiation dose to give a cured coating thickness of 25 μm for HC-CPI films.
Example 3:
the low shrinkage, high hardness, flexible, anti-fingerprint hardening coating of this example was prepared primarily from 60% epoxycyclohexylethyl-ladder polysilsesquioxane, 15% 3,3' - (oxybismethylene) bis (3-ethyl) oxetane, 3% 3- (perfluoro-n-octyl) propylene oxide, 2% triphenylhexafluoroantimonate, and 20% 2-butanone.
The preparation method of the low shrinkage, high hardness, flexible and fingerprint hardening prevention coating of the embodiment comprises the following steps:
(1) adding epoxy cyclohexyl ethyl-trapezoidal polysilsesquioxane into 2-butanone, and uniformly stirring to obtain slurry A;
adding 3- (perfluoro-n-octyl) epoxypropane into 3,3' - (oxybismethylene) bis (3-ethyl) oxetane, and uniformly stirring to obtain slurry B;
uniformly mixing the slurry A and the slurry B, and adding a photoinitiator triphenyl hexafluoroantimonate to obtain HC slurry;
(2) the HC slurry was applied to a CPI film (available from Kolon Co., Kolon, Korea) having a thickness of 50 μm, and the HC slurry-applied film was dried in an oven at 80 ℃ for 5 minutes and then placed at 1500mJ/cm in a nitrogen atmosphere2Photocuring was carried out under a UV lamp at a radiation dose to give a cured coating thickness of 25 μm for HC-CPI films.
Example 4:
the low shrinkage, high hardness, flexible, anti-fingerprint hardening coating of this example was prepared mainly from 60% epoxycyclohexylethyl-ladder polysilsesquioxane, 15% 3,3' - (oxybis-methylene) bis (3-ethyl) oxetane, 3% 3- (perfluoro-n-hexyl) propylene oxide, 2% triphenylhexafluoroantimonate, and 20% 2-butanone.
The preparation method of the low shrinkage, high hardness, flexible and fingerprint hardening prevention coating of the embodiment comprises the following steps:
(1) adding epoxy cyclohexyl ethyl-trapezoidal polysilsesquioxane into 2-butanone, and uniformly stirring to obtain slurry A;
adding 3- (perfluoro-n-hexyl) epoxypropane into 3,3' - (oxybis-methylene) bis (3-ethyl) oxetane, and uniformly stirring to obtain slurry B;
uniformly mixing the slurry A and the slurry B, and adding a photoinitiator triphenyl hexafluoroantimonate to obtain HC slurry;
(2) the HC slurry was applied to a CPI film (available from Kolon, Korea) having a thickness of 50 μm, and the HC slurry-applied film was dried in an oven at 80 ℃ for 5 minutes and then placed at 1500mJ/cm in a nitrogen atmosphere2Photocuring was carried out under a UV lamp at a radiation dose to give a cured coating thickness of 25 μm for HC-CPI films.
Example 5:
the low shrinkage, high hardness, flexible, anti-fingerprint hardening coating of this example was prepared mainly from 60% epoxycyclohexylethyl-ladder polysilsesquioxane, 15% 3,3' - (oxybismethylene) bis (3-ethyl) oxetane, 3% 3- (perfluoron-decyl) propylene oxide, 2% triphenylhexafluoroantimonate, and 20% 2-butanone.
The preparation method of the low shrinkage, high hardness, flexible and fingerprint hardening prevention coating of the embodiment comprises the following steps:
(1) adding epoxy cyclohexyl ethyl-trapezoidal polysilsesquioxane into 2-butanone, and uniformly stirring to obtain slurry A;
adding 3- (perfluoro-n-decyl) epoxypropane into 3,3' - (oxybis-methylene) bis (3-ethyl) oxetane, and uniformly stirring to obtain slurry B;
uniformly mixing the slurry A and the slurry B, and adding a photoinitiator triphenyl hexafluoroantimonate to obtain HC slurry;
(2) the HC slurry was applied to a CPI film (available from Kolon Co., Kolon, Korea) having a thickness of 50 μm, and the HC slurry-applied film was dried in an oven at 80 ℃ for 5 minutes and then placed at 1500mJ/cm in a nitrogen atmosphere2Photocuring was carried out under a UV lamp at a radiation dose to give a cured coating thickness of 25 μm for HC-CPI films.
The HC-CPI films prepared in examples 1 to 5 were tested for warpage, pencil hardness and water contact angle, and the results are shown in Table 1, wherein the thickness of the hardened coating in the HC-CPI films prepared by the invention can reach 25 μm, and the films have low warpage, high hardness and good water resistance.
Table 1: properties of HC-CPI examples 1 to 5
Figure 892494DEST_PATH_IMAGE001
Example 6:
the HC slurry was applied to a CPI film (available from Kolon, Korea) having a thickness of 50 μm in accordance with the formulation of example 1, and the HC slurry-applied film was dried in an oven at 80 ℃ for 5 minutes and then placed at 1500mJ/cm in a nitrogen atmosphere2UV lamp irradiation of radiation doseAfter curing, HC-CPI films having HC thicknesses of 20 μm, 25 μm, 30 μm, 35 μm and 45 μm were obtained, and the warpage, pencil hardness and dynamic inner bending property were measured, and the results are shown in Table 2. When the highest hardness (9H) is required, the thickness of a hardening coating with the thickness of 45 microns is selected, the warping degree meets the industrial standard, the minimum dynamic inner bending radius of 2mm can meet the requirements of most application scenes, and the smaller bending radius (1.5 mm) is required for some special application scenes, so that the HC thickness of 25mm can be selected, the hardness reaches 5H, and the hardness is higher than that of the conventional product (4H) on the market.
Table 2: properties of HC-CPI of example 6
Figure 652639DEST_PATH_IMAGE002
Example 7:
the HC slurry was applied to a CPI film (available from Kolon, Korea) having a thickness of 50 μm in accordance with the formulation of example 1, and the HC slurry-applied film was dried in an oven at 80 ℃ for 5 minutes and then placed under a nitrogen atmosphere at 1000, 1200, 1500, 2000mJ/cm, respectively2After photocuring with a UV lamp at a radiation dose, HC-CPI films having a HC thickness of 40 μm were obtained and tested for pencil hardness and optical properties, the results of which are shown in Table 3. UV energy mainly affects hardness and b value, 2000mJ/cm2Has the highest hardness (9H), and the b value meets the display industry standard (b ≦ 1.0).
Table 3: properties of HC-CPI of example 7
Figure DEST_PATH_IMAGE003
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The low-shrinkage, high-hardness, flexible and fingerprint-resistant hardened coating is characterized by being mainly prepared from polysilsesquioxane containing epoxy functional groups, epoxy monomers, fingerprint-resistant modifier, photoinitiator and solvent, wherein the epoxy monomers are selected from at least one of 3-ethyl-3-epoxypropane methanol and 3,3' - (oxybis-methylene) bis (3-ethyl) oxetane.
2. The low shrinkage, high hardness, flexible, anti-fingerprint hardening coating of claim 1, wherein the epoxy functional group containing polysilsesquioxane is selected from at least one of epoxycyclohexyl-cage polysilsesquioxane, glycidoxypropyl-cage polysilsesquioxane, epoxycyclohexyl-ladder polysilsesquioxane, glycidoxypropyl-ladder polysilsesquioxane.
3. The low shrinkage, high hardness, flexible, anti-fingerprint hardening coating of claim 1, wherein the anti-fingerprint modifier is an epoxy perfluoroalkane.
4. The low shrinkage, high hardness, flexible, anti-fingerprint hardening coating of claim 1, wherein the photoinitiator is selected from at least one of onium salt type initiators, metal organic type initiators, and organosilane type initiators.
5. The low shrinkage, high hardness, flexible, fingerprint hardening resistant coating of claim 1, wherein said solvent is selected from at least one of 2-butanone, ethyl acetate, butyl acetate.
6. The low shrinkage, high hardness, flexible, fingerprint hardening prevention coating of any one of claims 1-5, wherein the weight of the epoxy functional group containing polysilsesquioxane is 20 wt% -80wt% of the total weight of the raw materials, the weight ratio of the epoxy monomer to the epoxy functional group containing polysilsesquioxane is 2:8-5:5, and the weight ratio of the fingerprint prevention modifier to the sum of the epoxy functional group containing polysilsesquioxane and the epoxy monomer is 1:100-5: 100.
7. A method of preparing a low shrinkage, high hardness, flexible, anti-fingerprint hardening coating according to any one of claims 1-6, comprising the steps of:
(1) adding polysilsesquioxane containing epoxy functional groups into a solvent, and uniformly stirring to obtain slurry A;
adding the anti-fingerprint modifier into the epoxy monomer, and uniformly stirring to obtain slurry B;
uniformly mixing the slurry A and the slurry B, and adding a photoinitiator to obtain HC slurry;
(2) and coating the HC slurry on the surface of the base material, drying the solvent, and carrying out UV curing to form a low-shrinkage, high-hardness, flexible and fingerprint hardening prevention coating on the surface of the base material.
8. The method according to claim 7, wherein in the step (2), the temperature for drying is 60-130 ℃; the UV curing is carried out in a nitrogen environment, and the radiation dose of the UV curing is 1000-2000mJ/cm2。
9. The method according to claim 7, wherein the step (2) comprises any one of a roll coating method, a knife coating method, a dip coating method, a roll coating method, a spin coating method, and a slit coating method.
10. The method according to claim 7, wherein in the step (2), the substrate is at least one selected from the group consisting of a transparent polyimide substrate, a polyethylene terephthalate substrate, and polymethyl methacrylate.
CN202210116118.5A 2022-02-07 2022-02-07 Low-shrinkage high-hardness flexible fingerprint hardening prevention coating and preparation method thereof Pending CN114539915A (en)

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CN117339857A (en) * 2023-10-31 2024-01-05 苏州鼎驰金属材料有限公司 Method for producing platinum processed product

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CN113088182A (en) * 2021-05-17 2021-07-09 新恒东薄膜材料（常州）有限公司 Formula and preparation method of fingerprint-resistant high-hardness bendable low-shrinkage UV hardening liquid
WO2021172200A1 (en) * 2020-02-25 2021-09-02 株式会社カネカ Silsesquioxane compound and method for producing same, hard coat composition, hard coat film, and methods for producing same

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US20040186216A1 (en) * 2001-03-21 2004-09-23 Kazuyuki Satoh Surface-treating agent comprising inorganic/organic composite material
WO2015053397A1 (en) * 2013-10-11 2015-04-16 関西ペイント株式会社 Cationically photocurable coating composition, method for forming coating film, and article coated with same
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