Environmentally friendly optical coating material composition for low contamination and high transmission functional recovery and method for preparing the same

Abstract

Disclosed are an environmentally friendly optical coating material composition for functional recovery with low pollution and high transmission, and a method for preparing the same. The environmentally friendly optical coating material composition for functional recovery with low pollution and high transmission comprises, based on 100 parts by weight of the optical coating material composition, 1 to 30 parts by weight of a silane binder using an alkoxysilane as a binder; 0.05 to 20 parts by weight of an aqueous condensate of the alkoxysilane and a fluorine-based alkoxysilane; 50 to 95 parts by weight of a low-boiling point solvent; 0.01 to 30 parts by weight of a high-boiling point solvent; and 0.05 to 5 parts by weight of a catalyst.

Description

Technical Field

[0001] This invention relates to an environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration, and more specifically, to an AR (Anti-Reflective)-ASS (Anti-Static & Soiling) composite (integrated) functional optical coating composition for forming a coating film on a protective substrate of a solar cell module. This composition reduces the refractive index and reflectivity of the protective substrate of the solar cell module, increases the efficiency of optical properties, and provides anti-static and anti-fouling properties against static electricity generated on the protective substrate. Background Technology

[0002] Information regarding support for the research and development of this invention is as follows:

[0003] [Project Number] P20230039

[0004] [Department Name] Gyeonggi Province

[0005] [Research Management Agency] (Finance) Gyeonggi Provincial Economic Science Promotion Institute

[0006] [Research Title] Firm Dominance in General

[0007] [Research Topic Title] Development of Environmentally Friendly Optical Materials and Process Technologies for Improving the Pollution Resistance and Functionality of Solar Modules in the Field

[0008] [Contribution Rate] 100%

[0009] [Sponsoring Research Institution] RESOL Co., Ltd.

[0010] [Research Period] August 1, 2023 – July 31, 2024.

[0011] Climate change is becoming a major focus for countries worldwide. In response, current energy policies centered on fossil fuels are shifting towards low-carbon economic structures based on new and renewable energy sources, while the Green New Deal, aimed at increasing employment and investment, seeks to achieve "carbon neutrality" by reducing carbon emissions to "zero" by 2050. However, South Korea ranks last among OECD countries in terms of the share of new and renewable energy generation at 8.3%, with a still high proportion of coal-fired power plants, making carbon neutrality a distant prospect.

[0012] In addition, with the recent increase in environmental problems, hydropower, wind power, and solar power have attracted much attention as green energy sources. Among them, solar power, which utilizes solar energy, is a clean energy source that can help prevent global warming, and various studies are underway.

[0013] Photovoltaic (PV) power generation is a method of generating electricity by using solar cells to produce electricity through the photoelectric effect. It converts light energy into electrical energy and consists of elements such as solar cell modules, PCS (power conversion system), and energy storage devices.

[0014] In solar cell modules using semiconductors such as monocrystalline silicon, polycrystalline silicon, and amorphous silicon, silicon, gallium-arsenic, and copper-indium-selenide solar cell elements are protected by an upper transparent protective material (upper protective substrate) and a lower protective material (lower protective substrate), and the solar cell elements and protective substrate are fixed with adhesive.

[0015] Currently, in solar cell modules, the upper protective substrate (hereinafter referred to as "solar panel") is usually made of glass. However, because glass reflects sunlight, the power generation efficiency of the solar cell module is low. As a countermeasure, attempts have been made to apply anti-reflective films to solar panels. However, traditional anti-reflective films have the disadvantage that the power generation efficiency is reduced due to the decrease in anti-reflective properties.

[0016] In addition, solar cell modules suffer from reduced light transmittance due to electrostatic discharge (ESD) generated by the solar panels and soiling from external environmental contaminants (sand, dust, bird droppings, etc.), resulting in decreased power generation. According to a report by the International Energy Agency, this reduced light transmittance from solar panel soiling causes an average daily power loss of approximately 0.47%.

[0017] The amount of waste solar modules generated in South Korea is projected to increase exponentially, from 9,665 tons in 2023 to 17,531 tons in 2030 and 115,250 tons in 2050. However, the technology for widespread recycling of waste module materials is still under development. Even when recycling is implemented, it only involves dismantling the waste solar modules, recovering and separating some useful metals, while the majority is disposed of in landfills. This not only increases economic losses such as landfill costs but also has a severe impact on the environment.

[0018] To address the issues of reduced light transmittance and obsolete modules caused by solar panel contamination, a cleaning service to remove solar panel contamination (soiling) is being implemented.

[0019] However, the cleaning service can cause secondary problems such as reduced power generation efficiency and shortened solar panel lifespan due to scratches and increased reflectivity on the solar panel surface during cleaning.

[0020] It is understood that, due to the aforementioned cleaning services, the power generation of solar panels typically decreases by 0.3% to 0.8% annually.

[0021] Relatedly, the manufacturer guarantees 80% solar panel efficiency over 25 years, but based on the results of tests estimating the output loss of the solar panels after cleaning services, the reflectivity of the solar panels before cleaning services is about 4.4% to 5.8%, but after 500 cleaning services, the reflectivity of the solar panels increases to about 7.1% to 7.7%.

[0022] As a result, the increased reflectivity of the solar panel leads to a decrease in the power generation efficiency of the solar cell module, thus shortening the lifespan of the solar cell module that requires regular cleaning services to less than 10 to 20 years.

[0023] Existing technical documents

[0024] Patent documents

[0025] Patent Document 1: Korean Patent No. 10-2171739 Summary of the Invention

[0026] The technical problem to be solved

[0027] The present invention is proposed to solve the above-mentioned problems. The purpose of the present invention is to provide an environmentally friendly optical coating material composition for functional restoration of solar panels with low pollution and high transmission, which can reduce the refractive index and reflectivity of solar panels.

[0028] Another object of the present invention is to provide an environmentally friendly optical coating material composition for functional recovery with low pollution and high transmission, which can improve the anti-static function against electrostatic discharge (ESD) generated on solar panels.

[0029] Another object of the present invention is to provide an environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration, which can maximize the anti-fouling properties against pollutants that may originate from the external environment.

[0030] This invention aims to contribute to the construction of a green industrial innovation ecosystem that activates sustainable new and renewable energy industries and utilizes resources by using innovative energy materials technologies that can improve energy efficiency.

[0031] This invention provides an energy efficiency solution that prevents or minimizes adsorption contamination at its source to prevent energy efficiency degradation.

[0032] The shortened lifespan of solar modules (10-15 years in South Korea, 25 years in Germany, and 30 years in the United States) has caused economic problems due to the high unit price of solar power generation (according to Bourberg NEF, the cost of solar power generation in South Korea in 2020 was $106 per MWh, twice as high as $44 in the United States and $33 in China). This invention aims to contribute to the construction of green engineering (Ecological and Economical, E2) by extending the efficiency and lifespan of solar power generation to reduce the unit price of power generation, and further reducing the amount of solar waste generated and the cost of disposal (according to the Ministry of Environment, the amount of solar waste generated in 2023 was approximately 9,665 tons, with a reuse unit price of 727 won / kg and a recycling unit price of 94 won / kg).

[0033] Technical solutions to solve technical problems

[0034] To achieve the above objectives, this invention discloses an environmentally friendly optical coating material composition for low-pollution and high-transmission functional restoration. The composition, calculated as 100% by weight, comprises: 1-30% by weight of a silane binder; 0.05-20% by weight of a hydrated condensate of alkoxysilane and fluoroalkoxysilane; 50-95% by weight of a low-boiling-point solvent; 0.01-30% by weight of a high-boiling-point solvent; and 0.05-5% by weight of an acidic catalyst.

[0035] The silane adhesive may be composed of alkoxysilanes.

[0036] At this time, the alkoxysilane and the fluoroalkoxysilane can be mixed and reacted in a weight ratio of 50:50 to 99:1.

[0037] In addition, the alkoxysilane may be one or more selected from the group consisting of tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), methyltrimethoxysilane (MTMS), and methyltrimethoxysilane (MTES).

[0038] In addition, the fluoroalkoxysilane may be one or more selected from the group consisting of trifluoropropyltrimethoxysilane, perfluorooctyltriethoxysilane, trimethoxy(1H,1H,2H,2Hheptadecafluorodecyl)silane, and heptadecafluorodecyltriisopropoxysilane.

[0039] In addition, the low-boiling-point solvent can be one or more selected from the group consisting of methanol, ethanol, and isopropanol.

[0040] In addition, the high-boiling-point solvent may be one or more selected from the group consisting of propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, butanol, lauryl alcohol, nonanol, undecyl alcohol, diacetyl alcohol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, hexyl cellosolve, and dodecane.

[0041] In addition, the catalyst can be used with any one or more inorganic acids selected from phosphoric acid, hydrofluoric acid, nitric acid, hydrochloric acid, sulfuric acid, etc., or with any one or more organic acids selected from acetic acid, formic acid, citric acid, oxalic acid, dibutyltin dilaurate, etc., or a mixture of any one or more organic acids and any one or more inorganic acids.

[0042] Additionally, the silane adhesive may include alkoxysilanes.

[0043] In addition, the silane adhesive can be prepared by mixing 46% by weight of ethanol, 10% by weight of tetraethoxysilane, 8% by weight of water, and 0.05% by weight of hydrochloric acid.

[0044] Additionally, the fluoroalkoxysilane can be from 0.05% by weight to 20% by weight relative to the total weight of silane.

[0045] As another example of achieving the stated purpose, a method for preparing an environmentally friendly optical coating material composition for functional restoration with low pollution and high transmission is disclosed, characterized in that the hydrated condensate of the alkoxysilane and the fluoroalkoxysilane is prepared by mixing after oligomerization via a sol-gel reaction.

[0046] At this time, the sol-gel reaction is carried out with a composition including the alkoxysilane, the fluoroalkoxysilane, the catalyst, water and organic solvent, the reaction temperature is above 30°C and below 80°C, and the reaction time can be above 3 hours and below 5 hours.

[0047] Invention Effects

[0048] The effects of the present invention obtained through the above technical solution are as follows.

[0049] First, in this invention, a single-layer coating film is formed on the surface of the solar panel to reduce the refractive index and reflectivity, thereby increasing the efficiency of optical properties (transmittance and haze, etc.).

[0050] Secondly, in this invention, a single-layer coating film is formed on the surface of the solar panel to improve the anti-static function and anti-fouling properties against pollutants, thereby minimizing the adsorption of pollutants on the solar panel and making it easy to remove even if pollutants are adsorbed on the solar panel.

[0051] Furthermore, in this invention, even after prolonged use, the light transmittance will not decrease due to interference from pollution sources, thereby improving the power generation efficiency of the solar cell module.

[0052] Third, in this invention, a single-layer coating film is formed on the surface of the solar panel, which has excellent pollution resistance and weather resistance.

[0053] In particular, this invention does not disassemble or discard old modules that have reached the end of their service life. Instead, it extends the life of the modules by restoring their functionality at the site where they have been installed, allowing for reuse and recycling. Therefore, it is more environmentally friendly. Attached Figure Description

[0054] Figure 1 This is a graph illustrating how the transmittance of a sample glass is improved by using the composite functional optical coating material composition of the first and second embodiments of the present invention.

[0055] Figure 2 This is a diagram illustrating the state of improving the contact angle of a sample glass by using the composite functional optical coating material composition of the first embodiment of the present invention.

[0056] Figure 3 This is a photograph showing the superior pen-erasability of the composite functional coating material composition of the first embodiment of the present invention compared to the sample glass. Detailed Implementation

[0057] The following, with reference to the accompanying drawings, provides a more detailed description of an environmentally friendly optical coating material composition for low-pollution and high-transmission functional restoration, and its preparation method.

[0058] In describing the embodiments disclosed in this specification, detailed descriptions of relevant prior art will be omitted if it is believed that such descriptions may obscure the spirit of the embodiments disclosed in this specification.

[0059] The accompanying drawings are provided only to facilitate a better understanding of the embodiments disclosed in this specification, and are not intended to limit the technical ideas disclosed in this specification. They should be understood to include all modifications, equivalents, and substitutions included within the scope of the present invention.

[0060] In the following description, the singular expression includes multiple expressions unless the context clearly distinguishes them.

[0061] In this application, terms such as “comprising” or “having” should be understood as specifying the presence of features, figures, steps, actions, constituent elements, components, or combinations described in the specification, and not as excluding the presence or additional possibilities of one or more other features, figures, steps, actions, constituent elements, components, or combinations.

[0062] Hereinafter, the embodiments of the present invention are divided into the first embodiment to the third embodiment, with reference to the appendix. Figure 1 ~Attached Figure 3 This describes an environmentally friendly optical coating material composition for functional restoration with low pollution and high transmission (hereinafter referred to as the "coating material composition").

[0063] The coating material composition comprises a hydrated condensate of a silane binder and a fluoroalkoxysilane, a silane binder, a low-boiling-point solvent, a high-boiling-point solvent, and a catalyst.

[0064] The coating material composition of the present invention is characterized in that it comprises 1 to 30 wt% of a silane binder, 0.05 to 20 wt% of a hydrated condensate of alkoxysilane and fluoroalkoxysilane, 50 to 95 wt% of a low-boiling-point solvent, 0.01 to 30 wt% of a high-boiling-point solvent, and 0.05% to 5 wt% of an acidic catalyst.

[0065] In this invention, alkoxysilanes are used as adhesives to achieve basic mechanical properties and to impart strength to coatings suitable for the surface of solar panels. Preferably, tetrafunctional silane compounds, trifunctional silane compounds, etc.

[0066] Furthermore, the preferred content of the alkoxysilane binder is 1 to 30% by weight. When the content of alkoxysilane is less than 1% by weight, the hardness of the coating film cannot be maintained. When it exceeds 30% by weight, although the mechanical properties of the coating film are improved, the function of the mixed fluorine oligomers in the coating material composition is ultimately reduced, thereby reducing the antifouling effect.

[0067] The alkoxysilane may be one or more selected from the group consisting of tetraethoxyorthosilicate (TEOS), tetramethoxyorthosilicate (TMOS), methyltrimethoxysilane (MTMS), and methyltriethoxysilane (MTES).

[0068] This invention is applicable to the surface of solar panels. In order to impart low reflection, stain resistance and anti-static function, fluoroalkoxysilane is used. The water droplet contact angle of the coating film containing a certain amount of the fluoroalkoxysilane is greater than 110°, exhibiting basic hydrophobic properties and playing a role in improving the stain resistance to fingerprints, dust and other contaminants.

[0069] In the coating material composition of this invention, the hydrated condensate of alkoxysilane and fluoroalkoxysilane is preferably prepared by a sol-gel reaction. To maintain suitable hardness, improve the anti-reflective effect of the solar panel surface, and easily prevent dust and organic matter from contaminating the coating film, the hydrated condensate is preferably reacted by mixing the alkoxysilane and fluoroalkoxysilane in a weight ratio of 50:50 to 99:1, but is not limited thereto.

[0070] The sol-gel reaction can be carried out using methods commonly used in the relevant technical field, preferably with a composition comprising alkoxysilane, fluoroalkoxysilane, catalyst, water and organic solvent, at a reaction temperature of 30°C to 80°C for 3 to 5 hours, but not limited thereto.

[0071] In the hydrated condensation products of alkoxysilanes and fluoroalkoxysilanes, the alkoxysilane may be one or more selected from the group consisting of tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), methyltrimethoxysilane (MTMS), and methyltriethoxysilane (MTES).

[0072] Furthermore, in this invention, the fluoroalkoxysilane is preferably oligomerized and then mixed using a sol-gel method to impart stability and universality to the adhesive, but is not limited thereto. The fluoroalkoxysilane is preferably from 0.05% to 20% by weight of the total silane. If the fluoroalkoxysilane is less than 0.05% by weight of the total silane, it is difficult to ensure the stain resistance of the coating film; if it exceeds 20% by weight, the strength of the coating film will decrease. Here, "total silane" refers to the sum of the weights of the silane adhesive, the alkoxysilane, and the fluoroalkoxysilane.

[0073] The fluoroalkoxysilane may be selected from one or more of the group consisting of trifluoropropyltrimethoxysilane, perfluorooctyltriethoxysilane, trimethoxy(1H,1H,2H,2H-heptadecafluorodecyl)silane, and heptadecafluorodecyltriisopropoxysilane.

[0074] In the coating material composition of the preferred embodiment of the present invention, the low-boiling-point solvent imparts compatibility between the substances mixed in the coating liquid, thereby enabling rapid drying and faster curing of the coating film during its formation.

[0075] The low-boiling-point solvent is characterized in that it is selected from one or more of the group consisting of methanol, ethanol, and isopropanol.

[0076] In the preferred embodiment of the coating material composition of the present invention, the high-boiling-point solvent acts as a coolant for stabilizing the reaction under the heat applied during the hydration condensate reaction, and also contributes to the final formation of a uniform coating film. The high-boiling-point solvent is preferably 0.01% to 30% by weight per 100% of the coating material composition.

[0077] At this point, if the high-boiling-point solvent is less than 0.01% by weight (based on 100% by weight) in the coating material composition, the formation of a uniform coating film in the final coating film will be reduced; if it exceeds 30% by weight, the reaction of the hydrated condensate will be delayed, and the durability of the final coating film based on curing during coating film formation will decrease.

[0078] The high-boiling-point solvent may be one or more selected from the group consisting of propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, butanol, lauryl alcohol, nonanol, undecyl alcohol, diacetyl alcohol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, hexyl cellosolve, and dodecane.

[0079] The catalyst plays a role in inducing the formation of functional oligomers during the reaction, promoting the curing of the adhesive and affecting the viscosity when mixed with other raw materials, and ultimately promoting the reaction during the formation of the coating film to reduce the curing temperature.

[0080] As examples of catalysts that can be used in this invention, inorganic acids selected from phosphoric acid, hydrofluoric acid, nitric acid, hydrochloric acid, sulfuric acid, etc., or organic acids selected from acetic acid, formic acid, citric acid, oxalic acid, dibutyltin dilaurate, etc., can be used. Furthermore, organic and inorganic acids can be mixed. Of course, the catalysts are not limited to those described above.

[0081] The content of the catalyst can be appropriately adjusted taking into account the transparency of the coating film and the stability of the solution. Preferably, it is added from 0.05% to 5% by weight, based on 100% of the total coating material composition. If the added catalyst content is less than 0.05% by weight, it cannot function properly as a binder and reaction catalyst. If the added catalyst content exceeds 5% by weight, it may induce over-reaction, causing an increase in the viscosity of the coating material composition solution. With increased solution viscosity, the coating film may become uneven, and its stability during long-term storage may decrease.

[0082] [Example 1]

[0083] The glass substrate used to form the coating film is cleaned with ethanol to remove dust and organic contaminants present on the glass substrate.

[0084] Solution 1 [Sol1] is prepared by mixing 100% by weight of ethanol (low-boiling solvent), 1% by weight of hydrochloric acid (catalyst), and 12% by weight of water and stirring for about 15 minutes. Solution 2 [Sol2] is prepared by mixing 176% by weight of ethanol (low-boiling solvent), 1% by weight of ethyl cellosolve (high-boiling solvent), 11.3% by weight of heptadecafluorodecyltrimethoxysilane (fluoroalkoxysilane), and 20.1% by weight of tetraethoxysilane (silane binder) in another container and stirring for about 15 minutes.

[0085] Subsequently, solution 1 [Sol 1] was slowly added to solution 2 [Sol 2] and mixed, and a sol-gel reaction was carried out at a reaction temperature of 50°C for 5 hours. After the sol-gel reaction was completed, the mixed solution containing solution 1 and solution 2 was cooled to room temperature, and a pre-prepared silane binder was mixed into the mixed solution and stirred for 1 hour to prepare the coating material composition of Example 1.

[0086] The silane adhesive was prepared by mixing 46% by weight of ethanol, 10% by weight of tetraethoxysilane, 8% by weight of water, and 0.05% by weight of hydrochloric acid and stirring for 7 hours.

[0087] Subsequently, the coating material composition is applied to the glass substrate by a spin coating method to form a coating.

[0088] [Example 2]

[0089] After mixing 100% by weight of ethanol, 1% by weight of hydrochloric acid, and 12% by weight of water, stir for about 15 minutes to prepare solution 1 [Sol1]. In another container, mix 176% by weight of ethanol, 5% by weight of ethyl cellulase, 8% by weight of heptadecafluorodecyltrimethoxysilane, and 20.1% by weight of tetramethoxysilane, and stir for about 15 minutes to prepare solution 2 [Sol2].

[0090] Subsequently, solution 1 [Sol 1] was slowly added to solution 2 [Sol 2] and mixed, and a sol-gel reaction was carried out at a reaction temperature of 50°C for 3 hours. After the sol-gel reaction was completed, the mixed solution containing solution 1 and solution 2 was cooled to room temperature, and the pre-prepared silane binder was mixed into the mixed solution and stirred for 1 hour.

[0091] The silane adhesive was prepared by mixing 46% by weight of ethanol, 10% by weight of tetramethoxysilane, 8% by weight of water, and 0.05% by weight of hydrochloric acid and stirring for 7 hours.

[0092] [Example 3]

[0093] Except for replacing the fluorosilane with perfluorooctyltriethoxysilane, the preparation was carried out using the same method as in Example 1.

[0094] [Comparative Example 1]

[0095] Except that fluorinated oligomers are not used when preparing the coating material composition, it is prepared in the same manner as in Example 1.

[0096] [Comparative Example 2]

[0097] Except that 1 mol of methyltrimethoxysilane was used instead of fluorosilane when preparing the coating material composition, the preparation was carried out in the same manner as in Example 1.

[0098] [Comparative Example 3]

[0099] Except that 1 mol of octyltriethoxysilane was used instead of fluorosilane when preparing the coating material composition, the preparation was carried out in the same manner as in Example 1.

[0100] [Comparative Example 4]

[0101] Except that 1 mol of TTIP was used instead of fluorosilane when preparing the coating composition, the preparation was carried out in the same manner as in Example 1.

[0102] [Comparative Example 5]

[0103] The coating composition was prepared using the same method as in Example 1, except that 0.75 mol of TTIP was used instead of fluorosilane.

[0104] [evaluate]

[0105] The physical properties of the samples prepared by the examples and comparative examples are measured below.

[0106] 1. Substrate: Clear glass (90mm×90mm×3.2T). The transmittance of the substrate is 91.3%.

[0107] 2. Coating test specimens: 2g of the coating material composition solution prepared in each example and comparative example was dropped onto the substrate surface, and the substrate was rotated at 1200rpm for 10 seconds using a spin coater to coat the substrate. The coating was then cured on a hot plate at 150°C for 30 minutes to prepare the coating test specimens.

[0108] [Transmittance]

[0109] The transmittance of the coated samples was measured using a transmittance meter (Lambda 1050 (Perkin Elmer)).

[0110] [Contact Angle]

[0111] A droplet is dropped onto the coating sample, and the contact angle formed at the interface between the droplet and the coating sample is measured using a contact angle meter (Phoenix300, SEO).

[0112] [Haze]

[0113] The haze of the coated samples was measured using a haze meter (COH-5500, Nippon Denshoku) based on ASTM D 1003 specifications.

[0114] [Erasable]

[0115] After contaminating the surface of the coating sample with an oil-based signature pen (MONAMI), wipe it five times with a small squeegee (YUHANKIMBERLY), and then visually inspect it according to the following criteria.

[0116] Good: ○ (Completely erased)

[0117] General: △ (leaves a blurry trace)

[0118] Bad: × (Completely cannot be erased)

[0119] [Dust Removal Performance]

[0120] The surface of the coated sample was placed in the same environment for one week to allow it to be contaminated with household dust. After blowing it with air five times using a hair dryer, visual observation was performed according to the following criteria.

[0121] Good: ○ (Completely removed)

[0122] Bad: × (Not easily removed)

[0123] [Table 1]

[0124] Ordinary glass 91.32 - 0.06 44.97 × × Example 1 94.34 3.3％↑ 0.03 110.72 ○ ○ Example 2 94.26 3.2％↑ 0.04 111.56 ○ ○ Example 3 93.61 2.5％↑ 0.02 108.84 ○ ○ Comparative Example 1 92.07 0.8％↑ 0.05 55.5 × × Comparative Example 2 93.03 1.8％↑ 0.03 72.53 × × Comparative Example 3 92.85 1.53％ 0.06 97.66 △ × Comparative Example 4 89.58 1.9％↓ 1.1 57.82 × × Comparative Example 5 92.12 0.87％↑ 0.3 33.61 × ×

[0125] As shown in Table 1 above, it can be confirmed that the coating samples prepared by Examples 1 and 2, such as Figure 1 As shown, compared with ordinary glass substrates (bare glass), the transmittance through the cross-section coating increased from 91.32% to 94.34%.

[0126] Furthermore, it can be confirmed that the contact angle of the coated sample prepared by Example 1 of the present invention is 110° or more, such as Figure 2 As shown.

[0127] Furthermore, it can be confirmed that the pen-wipeability and dust removal properties of the coating sample prepared by Example 1 of the present invention yield satisfactory results, such as... Figure 3 As shown.

[0128] Conversely, as shown in Table 1, compared with Example 1 of the present invention, Comparative Examples 1 to 5 show that the increase in transmittance is lower or the transmittance is reduced, and the pen erasure and dust removal properties are not removed at all or are not easily removed.

[0129] The above description is merely exemplary, and various modifications can be made by those skilled in the art without departing from the scope and technical concept of the described embodiments. The above embodiments can be implemented individually or in any combination.

Claims

1. An environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration, comprising: Silane adhesives using alkoxysilanes as binders; The hydrated condensate of the alkoxysilane and fluoroalkoxysilane; Low-boiling-point solvents with lower boiling points relative to the following high-boiling-point solvents; High-boiling-point solvents with higher boiling points relative to the low-boiling-point solvents; and catalyst, The low-boiling-point solvent is selected from one or more of the group consisting of methanol, ethanol, and isopropanol. The high-boiling-point solvent is selected from one or more of the group consisting of propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, butanol, lauryl alcohol, nonanol, undecyl alcohol, diacetyl alcohol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, hexyl cellosolve, and dodecane. The optical coating material composition is prepared by a method comprising the following steps: The step of preparing solution 1 comprising the low-boiling-point solvent, the catalyst, and water; The step of preparing solution 2 by mixing the low-boiling-point solvent, the high-boiling-point solvent, and the hydrated condensate of the alkoxysilane and the fluoroalkoxysilane; The step of preparing a silane binder comprising the low-boiling-point solvent, the alkoxysilane, the catalyst, and water; The raw material solution preparation step involves mixing solution 1 and solution 2 and conducting a sol-gel reaction at a reaction temperature above 30°C and below 80°C for at least 3 hours and at least 5 hours to obtain the raw material solution; and The coating material composition preparation step involves adding the silane binder to the raw material solution to prepare the final composition. in, Based on 100% by weight, the optical coating material composition comprises: 1 to 30% by weight of a silane adhesive using the alkoxysilane as a binder; 0.05–20% by weight of the hydrated condensate of the alkoxysilane and fluoroalkoxysilane; 50–95% by weight of the low-boiling-point solvent; 0.01 to 30% by weight of the high-boiling-point solvent; and 0.05–5% by weight of catalyst, and The fluoroalkoxysilane has a content of 0.05% to 20% by weight relative to the total weight of silane.

2. The environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration according to claim 1, characterized in that, The alkoxysilane and the fluoroalkoxysilane are mixed and reacted in a weight ratio of 50:50 to 99:

1.

3. The environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration according to claim 1, characterized in that, The alkoxysilane is selected from one or more of the group consisting of tetraethoxyorthosilicate (TEOS), tetramethoxyorthosilicate (TMOS), methyltrimethoxysilane (MTMS), and methyltrimethoxysilane (MTES).

4. The environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration according to claim 1, characterized in that, The fluoroalkoxysilane is selected from one or more of the group consisting of trifluoropropyltrimethoxysilane, perfluorooctyltriethoxysilane, trimethoxy(1H,1H,2H,2Hheptadecafluorodecyl)silane, and heptadecafluorodecyltriisopropoxysilane.

5. The environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration according to claim 1, characterized in that, The silane adhesive is an adhesive mixed with 46% by weight ethanol, 10% by weight tetraethoxysilane, 8% by weight water, and 0.05% by weight hydrochloric acid.

6. The environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration according to claim 1, characterized in that, The catalyst is used with one or more inorganic acids selected from phosphoric acid, hydrofluoric acid, nitric acid, hydrochloric acid, sulfuric acid, etc., or with one or more organic acids selected from acetic acid, formic acid, citric acid, oxalic acid, dibutyltin dilaurate, etc., or a mixture of one or more organic acids and one or more inorganic acids.

7. A method for preparing an environmentally friendly optical coating material composition for low-pollution and high-transmittance functional restoration. An optical coating material composition is prepared using the aforementioned preparation method. Based on 100% by weight, the optical coating material composition comprises: 1-30% by weight of silane adhesives using alkoxysilanes as binders; 0.05–20% by weight of the hydrated condensate of the alkoxysilane and fluoroalkoxysilane; 50–95% by weight of low-boiling-point solvents with lower boiling points than the following high-boiling-point solvents; 0.01 to 30% by weight of a high-boiling-point solvent with a boiling point higher than that of the low-boiling-point solvent; and Catalysts comprising more than 0.05% by weight and less than 5% by weight, The low-boiling-point solvent is selected from one or more of the group consisting of methanol, ethanol, and isopropanol. The high-boiling-point solvent is one or more solvents selected from the group consisting of propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, butanol, lauryl alcohol, nonanol, undecyl alcohol, diacetyl alcohol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, hexyl cellosolve, and dodecane. The fluoroalkoxysilane comprises from 0.05% to 20% by weight relative to the total weight of the silane. The preparation method includes: The step of preparing solution 1 comprising the low-boiling-point solvent, the catalyst, and water; The step of preparing solution 2 by mixing the low-boiling-point solvent, the high-boiling-point solvent, and the hydrated condensate of the alkoxysilane and the fluoroalkoxysilane; The step of preparing a silane binder comprising the low-boiling-point solvent, the alkoxysilane, the catalyst, and water; The raw material solution preparation step involves mixing solution 1 and solution 2 and conducting a sol-gel reaction at a reaction temperature above 30°C and below 80°C for at least 3 hours and at least 5 hours to obtain the raw material solution; and The coating material composition preparation step involves adding the silane binder to the raw material solution to prepare the final composition.

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