CN116376424B - UV anti-fog coating for solar cell light-transmitting sheet - Google Patents

UV anti-fog coating for solar cell light-transmitting sheet Download PDF

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CN116376424B
CN116376424B CN202310209148.5A CN202310209148A CN116376424B CN 116376424 B CN116376424 B CN 116376424B CN 202310209148 A CN202310209148 A CN 202310209148A CN 116376424 B CN116376424 B CN 116376424B
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coating
acrylic resin
fog
hydrophilic
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CN116376424A (en
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邓书春
彭健华
吴勇
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Guangdong Xigui UV Curing Materials Co Ltd
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Guangdong Xigui UV Curing Materials 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
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    • H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
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    • H01L31/02168—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells the coatings being antireflective or having enhancing optical properties for the solar cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
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Abstract

The invention provides a UV anti-fog coating for a solar cell light-transmitting sheet, and relates to the technical field of coatings; the coating comprises the following components in parts by weight: 20-40 parts of hydrophilic polyurethane acrylic resin; 10-20 parts of hydrophilic amino acrylic resin; 3-10 parts of acrylic acid monomer; 5-10 parts of composite filler; 1-5 parts of a photoinitiator; 1-2 parts of an auxiliary agent; 25-45 parts of solvent. According to the UV anti-fog coating for the solar light-transmitting sheet, hydrophilic polyurethane acrylic resin and hydrophilic amino acrylic resin are used for introducing hydrophilic groups into a system, so that the spreadability of water drops on the surface of a coating film forming substance is guaranteed, and therefore the anti-fog effect is improved.

Description

UV anti-fog coating for solar cell light-transmitting sheet
Technical Field
The invention relates to the technical field of coatings, in particular to a UV anti-fog coating for a solar cell light-transmitting sheet.
Background
Because the solar energy and the photovoltaic power generation accord with the environmental protection concept of energy conservation and emission reduction and greenhouse gas reduction, the solar energy and photovoltaic power generation technology is widely applied.
The existing solar battery pack is covered with a light-transmitting sheet, and because the use sites are all outdoor, the light-transmitting sheet is easy to generate a fog phenomenon due to the difference of outdoor environment temperature and humidity.
After the fog is formed on the light-transmitting sheet, the small water drops forming the fog can enable incident light to be reflected, scattered, diffracted and the like, so that the light transmitted to the surface of the solar cell can be reduced, and the conversion efficiency of the solar cell is reduced.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problem that a solar cell transparent sheet is easy to fog in the prior art, the invention provides the UV anti-fog coating for the solar cell transparent sheet, which can solve the problem that the solar cell transparent sheet is easy to fog after being coated on the transparent sheet, so that solar light can be transmitted to the surface of the solar cell to the maximum extent, and the conversion efficiency of the solar cell is improved.
The technical scheme adopted for solving the technical problems is as follows:
the UV anti-fog coating for the solar cell light-transmitting sheet comprises the following components in parts by weight:
optionally, the hydrophilic urethane acrylic resin is prepared according to the following method:
s1: dissolving hydroxyethyl methacrylate and N, N-dimethylacrylamide in dioxane to obtain a first solution;
s2: dissolving 2-acrylamide-2-methylpropanesulfonic acid in an N, N-dimethylformamide solvent, and adding a polymerization inhibitor p-hydroxyanisole to obtain a second solution;
s3: adding the first solution and the second solution into a three-necked bottle provided with a mechanical stirring, a reflux condenser pipe and a nitrogen inlet, adding azodiisobutyronitrile, stirring uniformly, introducing nitrogen for 10min, heating to 70 ℃, continuously introducing nitrogen, stirring, cooling and refluxing, and reacting to obtain a copolymer A solution;
s4: mixing isophorone diisocyanate, dibutyltin dilaurate and para-hydroxyanisole, heating to 40 ℃, dropwise adding pentaerythritol triacrylate, adding butanone, and stopping the reaction when the concentration of-NCO is unchanged by sampling to obtain an IPDI-PETA semi-addition product B;
s5: and heating the copolymer A solution to 60 ℃, dropwise adding the IPDI-PETA semi-addition product B, stopping the reaction when the sampling test-NCO concentration is less than 0.2%, and distilling the residual solvent to obtain the hydrophilic polyurethane acrylic resin.
Optionally, the mass ratio of the hydroxyethyl methacrylate, the N, N-dimethylacrylamide, the 2-acrylamide-2-methylpropanesulfonic acid, the isophorone diisocyanate and the pentaerythritol triacrylate is 13:10:21:22.5:30.
Optionally, the hydrophilic amino acrylic resin is a methylated amino acrylic resin.
Optionally, the acrylic monomer is hydrophilic tetra-functional ethoxylated pentaerythritol tetraacrylate.
Optionally, the composite filler comprises silica hollow microspheres and zinc oxide.
Optionally, in the composite filler, the mass ratio of the silica hollow microspheres to the zinc oxide is 2:1.
Optionally, the particle size of the silica hollow microspheres is 10-100 μm; the particle size of the zinc oxide is 20-30nm.
Optionally, the auxiliary agent is a hydrophilic organosilicon auxiliary agent.
Optionally, the photoinitiator is Irgacure 2959; the solvent is at least one selected from ethyl acetate and butyl acetate.
The beneficial effects of the invention are as follows:
according to the UV anti-fog coating for the solar light-transmitting sheet, hydrophilic polyurethane acrylic resin and hydrophilic amino acrylic resin are used for introducing hydrophilic groups into a system, so that the spreadability of water drops on the surface of a coating film forming substance is guaranteed, the anti-fog effect is improved, the fog of the light-transmitting sheet is avoided after the UV anti-fog coating is coated on the solar light-transmitting sheet, solar light can be transmitted to the surface of a solar cell to the greatest extent, and the conversion efficiency of the solar cell is improved; further, through the synergistic effect of the hydrophilic polyurethane acrylic resin, the hydrophilic amino acrylic resin, the acrylic monomer and the composite filler, the coating prepared by the UV coating has excellent adhesive force, weather resistance and surface hardness with the battery piece, and the durability of the anti-fog effect is improved.
Detailed Description
The present invention will now be described in further detail. The embodiments described below are exemplary and intended to illustrate the invention and should not be construed as limiting the invention, as all other embodiments, based on which a person of ordinary skill in the art would obtain without inventive faculty, are within the scope of the invention.
In order to solve the problem that a solar cell transparent sheet is easy to fog in the prior art, the invention provides a UV anti-fog coating for the solar cell transparent sheet, which comprises the following components in parts by weight:
according to the UV anti-fog coating for the solar light-transmitting sheet, hydrophilic polyurethane acrylic resin and hydrophilic amino acrylic resin are used for introducing hydrophilic groups into a system, so that the spreadability of water drops on the surface of a coating film forming substance is guaranteed, the anti-fog effect is improved, the fog of the light-transmitting sheet is avoided after the UV anti-fog coating is coated on the solar light-transmitting sheet, solar light can be transmitted to the surface of a solar cell to the greatest extent, and the conversion efficiency of the solar cell is improved; further, through the synergistic effect of the hydrophilic polyurethane acrylic resin, the hydrophilic amino acrylic resin, the acrylic monomer and the composite filler, the coating prepared by the UV coating has excellent adhesive force, weather resistance and surface hardness with the battery piece, and the durability of the anti-fog effect is improved.
The hydrophilic urethane acrylic resin of the present invention is preferably a trifunctional hydrophilic urethane acrylic resin, and further preferably the hydrophilic urethane acrylic resin is prepared as follows:
s1: dissolving hydroxyethyl methacrylate and N, N-dimethylacrylamide in dioxane to obtain a first solution;
s2: dissolving 2-acrylamide-2-methylpropanesulfonic acid in N, N-Dimethylformamide (DMF) solvent, and adding a polymerization inhibitor p-hydroxyanisole to obtain a second solution;
s3: adding the first solution and the second solution into a three-necked bottle provided with a mechanical stirring, a reflux condenser and a nitrogen inlet, adding Azodiisobutyronitrile (AIBN), stirring uniformly, introducing nitrogen for 10min, heating to 70 ℃, continuously introducing nitrogen, stirring, cooling and refluxing to react to obtain a copolymer A solution;
s4: mixing isophorone diisocyanate (IPDI), dibutyltin dilaurate and para-hydroxyanisole, heating to 40 ℃, dropwise adding pentaerythritol triacrylate (PETA), adding butanone, and stopping the reaction when the concentration of-NCO is unchanged by sampling to obtain an IPDI-PETA semi-addition product B;
s5: and (3) heating the copolymer A solution to 60 ℃, dropwise adding the IPDI-PETA semi-addition product B, stopping the reaction when the sampling test-NCO concentration is less than 0.2%, and distilling the residual solvent to obtain the hydrophilic polyurethane acrylic resin, namely the trifunctional hydrophilic polyurethane acrylic resin.
The hydrophilic polyurethane acrylic resin is synthesized by raw materials such as hydroxyethyl methacrylate, dimethylacrylamide, 2-acrylamide-2-methylpropanesulfonic acid and the like with hydrophilic groups, so that a large amount of hydrophilic groups can be introduced into the system, and the anti-fog effect is improved.
In order to achieve the anti-fog effect, the adhesive force, the weather resistance and the mechanical property of the coating, the mass ratio of hydroxyethyl methacrylate, N-dimethylacrylamide, 2-acrylamide-2-methylpropanesulfonic acid, isophorone diisocyanate and pentaerythritol triacrylate is preferably 13:10:21:22.5:30.
Furthermore, the hydrophilic amino acrylic resin is preferably a methylated amino acrylic resin, and is particularly preferably Jiangsu Sanmu chemical 6117; preferably, the acrylic monomer is a hydrophilic tetra-functional ethoxylated pentaerythritol tetraacrylate.
The preferable composite filler comprises the silicon dioxide hollow microspheres and zinc oxide, so that the anti-fog effect of the micro-nano structure coating at a lower temperature is realized through the heat preservation effect of the hollow microspheres while the anti-fog effect of the foundation is ensured by the hydrophilic amino acrylic ester and the hydrophilic high-functional monomer, and the lasting anti-fog effect is realized; and the adhesive force and the hardness of the coating are improved through the silicon dioxide hollow microspheres and the zinc oxide.
In the preferable composite filler, the mass ratio of the silicon dioxide hollow microspheres to the zinc oxide is 2:1; and further preferably the silica hollow microspheres have a particle size of 10 to 100 μm; the particle size of the zinc oxide is 20-30nm.
Preferred adjuvants of the present invention are hydrophilic silicone adjuvants, and particularly preferred is TEGO 410; the preferred photoinitiator is Irgacure 2959; the solvent is at least one selected from ethyl acetate and butyl acetate.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of embodiments of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The hydrophilic urethane acrylic resins in the respective examples of the present invention and comparative examples were prepared as follows, without particular explanation:
s1: 13g of hydroxyethyl methacrylate and 10g of N, N-dimethylacrylamide are weighed and dissolved in 50g of dioxane to obtain a first solution;
s2: 21g of 2-acrylamide-2-methylpropanesulfonic acid is weighed and dissolved in 50g of DMF solvent, and 0.01g of polymerization inhibitor p-hydroxyanisole is added to obtain a second solution;
s3: adding the first solution and the second solution into a 500mL three-necked bottle provided with a mechanical stirring, a reflux condenser and a nitrogen inlet, adding 0.2g of AIBN, stirring uniformly, introducing nitrogen for 10min, heating to 70 ℃, continuously introducing nitrogen, stirring, cooling and refluxing to react to obtain a copolymer A solution;
s4: taking 22.5g of IPDI, 0.01g of dibutyltin dilaurate and 0.01g of para-hydroxyanisole in a 200Ml three-neck flask, heating to 40 ℃, dropwise adding 30g of pentaerythritol triacrylate for 2 hours, adding 50mL of butanone, and stopping the reaction when the concentration of-NCO is unchanged by sampling and determining to obtain an IPDI-PETA semi-addition product B;
s5: and (3) taking the copolymer A solution in a 500mL three-neck flask, heating to 60 ℃, dropwise adding the IPDI-PETA semi-addition product B, stopping the reaction when the sample test-NCO concentration is less than 0.2%, and distilling the residual solvent to obtain hydrophilic polyurethane acrylic resin, which is marked as self-made resin I.
Example 1
The embodiment provides a UV anti-fog coating for a solar light-transmitting sheet, which comprises the following components in parts by weight:
example 2
The embodiment provides a UV anti-fog coating for a solar light-transmitting sheet, which comprises the following components in parts by weight:
example 3
The embodiment provides a UV anti-fog coating for a solar light-transmitting sheet, which comprises the following components in parts by weight:
comparative example 1
The comparative example provides a UV anti-fog coating, which comprises the following components in parts by weight:
the commercial antifog resin in this comparative example was SW-868 in Sanwang chemical, guangzhou.
Comparative example 2
The difference between this comparative example and example 1 is that homemade resin II was used instead of homemade resin I in example 1, wherein homemade resin II was prepared as follows:
s1: 13g of hydroxyethyl methacrylate and 10g of N, N-dimethylacrylamide are weighed and dissolved in 50g of dioxane to obtain a first solution;
s2: 21g of 2-acrylamide-2-methylpropanesulfonic acid is weighed and dissolved in 50g of DMF solvent, and 0.01g of polymerization inhibitor p-hydroxyanisole is added to obtain a second solution;
s3: the first solution and the second solution are added into a 500mL three-necked bottle provided with a mechanical stirring, a reflux condenser and a nitrogen inlet, 0.2g of AIBN is added, after the stirring is uniform, nitrogen is introduced for 10min, the temperature is raised to 70 ℃, the nitrogen is continuously introduced, stirring and cooling reflux are carried out, the hydrophilic copolymer is obtained, and the self-made resin II is marked.
Comparative example 3
The comparative example provides a UV anti-fog coating for a solar light-transmitting sheet, which comprises the following components in parts by weight:
comparative example 4
The comparative example provides a UV anti-fog coating for a solar light-transmitting sheet, which comprises the following components in parts by weight:
comparative example 5
The comparative example provides a UV anti-fog coating, which comprises the following components in parts by weight:
the butylated amino resin (not hydrophilic) in this comparative example was 2600 of Guangdong constant photo new material.
Comparative example 6
The comparative example provides a UV anti-fog coating, which comprises the following components in parts by weight:
the epoxy resin in this comparative example was SM6104 in Jiangsu Sanmu chemical.
Comparative example 7
The comparative example provides a UV anti-fog coating, which comprises the following components in parts by weight:
the composite filler in the comparative example is a silica solid microsphere with the diameter of 10-100 mu m and zinc oxide with the diameter of 20-30nm according to the weight ratio of 2:1.
Comparative example 8
The comparative example provides a UV anti-fog coating, which comprises the following components in parts by weight:
the filler in this comparative example is a 10-100 μm hollow microsphere of silica.
Comparative example 9
The comparative example provides a UV anti-fog coating, which comprises the following components in parts by weight:
the filler in this comparative example was 20-30nm zinc oxide.
Comparative example 10
The comparative example provides a UV anti-fog coating, which comprises the following components in parts by weight:
after preparing the UV coating prepared in the above examples and comparative examples into a solution, coating the coating on PC coiled material by adopting a micro-concave coating mode, controlling the coating amount to be 5-8 g/square meter, drying the solvent at 60 ℃ and passing through the solution not lower than 400mj/cm 2 Different anti-fog coatings were obtained and their properties were tested according to the following method:
testing the adhesive force of soaking water: drawing a deep scratch on the surface of the anti-fog coating by using a sharp metal object, soaking in tap water for 10 minutes, immediately vertically scratching the surface of the anti-fog coating by using fingernails and the scratch after taking out, and judging that the adhesive force of the anti-fog coating is qualified if the anti-fog coating is not scratched by the fingernails; and if the test result is failed, marking the test result as NG.
Pencil hardness test: the weight is 750g according to GB/T6739-2006 standard test.
Adhesion test: tested according to GB9286-1998 standard.
Anti-fog performance test: the coating samples were evaluated by visual testing for atomization/light transmission by holding them on a thermostatic water bath at a temperature difference of 50 c for 15 s. If the coating is completely atomized and the transmittance is extremely low, the coating is judged to have no anti-fog function, and the evaluation is 1; if the coating is completely atomized, the visibility is zero, the light transmittance is weak, and the evaluation is 2; if the coating is partially atomized, the visibility is weak, and the evaluation is 4; if the coating is partially atomized, a discontinuous water film is formed, and the evaluation is 6; if the coating part forms a discontinuous water film, most of the coating part transmits light, and the coating part is evaluated as 8; if the coating is not atomized at all, keeping the coating transparent throughout, the anti-fog function of the coating is rated as 10.
Antifogging property test at 10 ℃ or below: the samples were subjected to cold storage at a temperature of 10℃or below for 12 hours, taken out to simulate a rain test, and visually tested for fogging/light transmittance to evaluate the samples.
The light transmittance was measured using a split light transmittance tester DRTG-81.
The test results of directly testing the test specimen according to the above method are shown in table 1:
TABLE 1
Further performing xenon lamp aging test on the sample to simulate solar light irradiation; the xenon lamp aging test adopts GB/T2424.14-1995 test standard; the test results of the test sample after the aging test were shown in table 2, and the test sample was retested according to the test method described above.
TABLE 2
From the data, the UV anti-fog coating provided by the invention has excellent anti-fog effect after being used for a solar light-transmitting sheet, and can still have excellent anti-fog effect even in a low-temperature environment below 10 ℃; the coating has excellent adhesive force, blister resistance and hardness, and can avoid the falling of the coating; the solar cell has higher light transmittance, so that the arrangement of the coating does not reduce the light transmitted to the surface of the solar cell and the conversion efficiency of the solar cell; after an aging test is carried out, the coating prepared by the coating provided by the invention only has slightly reduced light transmittance, and the anti-fog performance, adhesive force and the like of the coating are not deteriorated, so that the light-transmitting sheet coated with the UV coating provided by the invention has lasting anti-fog effect.
Compared with the scheme provided in the example 1, the commercial anti-fog paint is used for replacing the self-made resin I in the invention, and after the prepared paint is used for a light-transmitting sheet, the light transmittance and the anti-fog performance of the paint are slightly reduced, and the hardness of the paint is obviously reduced; after the ageing test, the anti-fog performance and the light transmittance of the coating are further reduced, and the water-soaking resistance is obviously deteriorated.
Compared with the scheme provided in the example 2, the self-made resin II is used for replacing the self-made resin I in the invention, and after the prepared coating is used for a light-transmitting sheet, the adhesive force, the light transmittance and the anti-fog performance of the coating are slightly reduced, and the hardness and the water-soaking resistance of the coating are obviously reduced; after the aging test, the light transmittance and the antifogging property were further lowered.
Compared with the scheme provided in the example 1, the scheme provided in the comparative example 3 is that the prepared coating is slightly reduced in adhesive force and hardness after being used for a light-transmitting sheet without adding hydrophilic amino acrylic resin, and both the anti-fog performance and the water-soaking resistance are obviously deteriorated; after the aging test, the light transmittance and the antifogging property were further lowered.
Compared with the scheme provided in the example 1, the scheme provided in the comparative example 4 is that the prepared coating is used for a light-transmitting sheet without adding self-made resin I, so that the anti-fog performance of the coating is obviously reduced, and the blister resistance and hardness are obviously deteriorated; after the aging test, the light transmittance is obviously reduced, and the anti-fog performance is further reduced.
The scheme provided in comparative example 5 is that, compared with example 1, butyl etherified amino resin (not hydrophilic) is used for replacing hydrophilic amino acrylic resin, and after the prepared coating is used for a light-transmitting sheet, the anti-fog performance of the coating is reduced, and the anti-fog performance of the coating is obviously lower than that of the coating below 10 ℃; after the aging test, the antifogging property was further lowered.
Compared with the scheme provided in the example 1, the scheme provided in the comparative example 6 uses epoxy resin to replace hydrophilic amino acrylic resin, and after the prepared coating is used for a light-transmitting sheet, the adhesive force and the anti-fog performance of the coating are reduced; after the aging test, the light transmittance and the antifogging property are obviously deteriorated.
Compared with the scheme provided in the embodiment 1, the silica microspheres in the composite filler are solid microspheres, and after the prepared coating is used for a light-transmitting sheet, the anti-fog performance of the coating is reduced, and the anti-fog performance of the coating below 10 ℃ is obviously lower than that of the coating; meanwhile, the light transmittance is obviously reduced; after the aging test, the light transmittance was further lowered.
The scheme provided in comparative example 8 is that compared with example 1, the filler is only 10-100 μm of silica hollow microsphere, and the anti-fog performance of the coating is slightly reduced after the prepared coating is used in a light-transmitting sheet; after the aging test, the antifogging property is not changed obviously, but the light transmittance is reduced obviously.
Compared with the embodiment 1, the scheme provided by the comparative example 9 is that the filler is zinc oxide with the thickness of only 20-30nm, and after the prepared coating is used for a light-transmitting sheet, the anti-fog performance of the coating is reduced, and the anti-fog performance of the coating below 10 ℃ is obviously lower than that of the coating; after the aging test, the antifogging property is not changed obviously, but the light transmittance is reduced obviously.
Compared with the scheme provided in the example 1, pentaerythritol tetraacrylate is used for replacing ethoxylated pentaerythritol tetraacrylate, and after the prepared coating is used for a light-transmitting sheet, the antifogging property of the coating is reduced, and the antifogging property of the coating is obviously reduced below 10 ℃; after the aging test, the anti-fog performance is obviously reduced below 10 ℃, and the light transmittance is obviously reduced.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims (5)

1. The UV anti-fog coating for the solar cell light-transmitting sheet is characterized by comprising the following components in parts by weight:
20-40 parts of hydrophilic polyurethane acrylic resin;
10-20 parts of hydrophilic amino acrylic resin;
3-10 parts of acrylic acid monomer;
5-10 parts of composite filler;
1-5 parts of a photoinitiator;
1-2 parts of an auxiliary agent;
25-45 parts of a solvent;
the hydrophilic polyurethane acrylic resin is prepared according to the following method:
s1: dissolving hydroxyethyl methacrylate and N, N-dimethylacrylamide in dioxane to obtain a first solution;
s2: dissolving 2-acrylamide-2-methylpropanesulfonic acid in an N, N-dimethylformamide solvent, and adding a polymerization inhibitor p-hydroxyanisole to obtain a second solution;
s3: adding the first solution and the second solution into a three-necked bottle provided with a mechanical stirring, a reflux condenser pipe and a nitrogen inlet, adding azodiisobutyronitrile, stirring uniformly, introducing nitrogen for 10min, heating to 70 ℃, continuously introducing nitrogen, stirring, cooling and refluxing, and reacting to obtain a copolymer A solution;
s4: mixing isophorone diisocyanate, dibutyltin dilaurate and para-hydroxyanisole, heating to 40 ℃, dropwise adding pentaerythritol triacrylate, adding butanone, and stopping the reaction when the concentration of-NCO is unchanged by sampling to obtain an IPDI-PETA semi-addition product B;
s5: heating the copolymer A solution to 60 ℃, dropwise adding the IPDI-PETA semi-addition product B, stopping the reaction when the sampling test-NCO concentration is less than 0.2%, and distilling the residual solvent to obtain hydrophilic polyurethane acrylic resin;
hydroxyethyl methacrylate, N-dimethylacrylamide, 2-acrylamide-2-methylpropanesulfonic acid, isophorone diisocyanate and pentaerythritol triacrylate in a mass ratio of 13:10:21:22.5:30;
the hydrophilic amino acrylic resin is methylated amino acrylic resin;
the acrylic acid monomer is hydrophilic tetra-functional ethoxylated pentaerythritol tetraacrylate;
the composite filler comprises silica hollow microspheres and zinc oxide.
2. The UV anti-fog coating for a solar cell transparence sheet of claim 1 wherein the mass ratio of the silica hollow microspheres to the zinc oxide in the composite filler is 2:1.
3. The UV anti-fog coating for a solar cell light-transmitting sheet according to claim 1, wherein the silica hollow microspheres have a particle size of 10-100 μm; the particle size of the zinc oxide is 20-30nm.
4. The UV anti-fog coating for a solar cell transparence sheet of claim 1 wherein the auxiliary is a hydrophilic silicone auxiliary.
5. The UV anti-fog coating for a solar cell transparence sheet of claim 1 wherein the photoinitiator is Irgacure 2959; the solvent is at least one selected from ethyl acetate and butyl acetate.
CN202310209148.5A 2023-03-07 2023-03-07 UV anti-fog coating for solar cell light-transmitting sheet Active CN116376424B (en)

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