CN115806757A - Black high-reflection fluorocarbon two-component coating, preparation and application thereof to photovoltaic panel - Google Patents
Black high-reflection fluorocarbon two-component coating, preparation and application thereof to photovoltaic panel Download PDFInfo
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- CN115806757A CN115806757A CN202211632321.4A CN202211632321A CN115806757A CN 115806757 A CN115806757 A CN 115806757A CN 202211632321 A CN202211632321 A CN 202211632321A CN 115806757 A CN115806757 A CN 115806757A
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Abstract
The invention relates to the technical field of fluorocarbon two-component coatings, in particular to a black high-reflection fluorocarbon two-component coating, a preparation method and an application thereof in a photovoltaic panel. The coating consists of a component A and a component B according to the following mass percentage, wherein the component A is black coating, and the component B is isocyanate curing agent; the component A comprises the following components in percentage by weight: 40-45% of FEVE fluorocarbon resin; 15-20% of a solvent; 30-35% of dark green metal oxide mixed-phase pigment; 2-4% of high-weatherability red pigment; 0.5 to 1 percent of coupling agent; 0.3 to 0.5 percent of dispersant; 0.3 to 0.5 percent of flatting agent; 0.2 to 0.3 percent of defoaming agent; 0.5 to 1 percent of anti-settling agent; the component B comprises the following components in percentage by weight: 55-65% of isocyanate curing agent; 35-45% of a solvent; 0.02-0.04% of drier. On the premise of keeping the color of the fluorocarbon coating black (the values of L, a and b in a visible light region of 380nm-760nm are basically consistent), the reflectivity of a near infrared region (760 nm-1200 nm) is improved. 2) Solves the problems of color bleeding and migration of the organic black pigment.
Description
Technical Field
The invention relates to the technical field of fluorocarbon two-component coatings, in particular to a black high-reflection fluorocarbon two-component coating, a preparation method and an application thereof in a photovoltaic panel.
Background
The photovoltaic back plate is an important component of the solar cell module, and the photovoltaic back plate and the solar silicon wafer are firmly bonded into a whole through EVA glue to play a role in protecting the cell, so the photovoltaic back plate is required to be sealed, insulated, waterproof and ageing-resistant, and is used for enhancing the ageing-resistant and corrosion-resistant performances of the photovoltaic module and prolonging the service life of the photovoltaic module.
According to scientific research, the solar radiation energy is mainly distributed in an ultraviolet region (with the wavelength less than 380 nm) accounting for about 7 percent, a visible light region (with the wavelength of 380nm-760 nm) accounting for about 50 percent and an infrared region (with the wavelength more than 760 nm) accounting for about 43 percent, wherein the solar radiation energy dense region comprises the visible light region and a near infrared region (with the wavelength of 380nm-1200 nm), the total energy density accounts for more than 90 percent of the total solar radiation, at present, most photovoltaic back panels are pure white, the color contrast between a white photovoltaic back panel and a black solar silicon wafer is too large, the light pollution is easily caused by light reflection, the photovoltaic back panels are not suitable for certain specific occasions, and the optimal color matching can be achieved by using the black photovoltaic back panel, the full-black photovoltaic silicon wafer and components, and the solar photovoltaic back panel is mainly applied to a distributed photovoltaic system of roofs and facades.
At present, inorganic metal mixed-phase pigments such as copper-chromium black, iron-chromium black and the like are mainly used for a black fluorocarbon coating used on a photovoltaic back plate, and the black fluorocarbon coating has excellent outdoor aging resistance, light resistance, high temperature resistance, no color bleeding and no migration, but due to the inherent high sunlight absorption and low reflection of the black pigment, the temperature of the back plate is increased violently when solar radiation is strong, so that the risk of thermal runaway of electronic components in a back controller of the back plate is caused. The organic high-reflection black pigment P32 black is adopted to replace copper chromium black and iron chromium black pigments, the organic black pigment has high reflection performance in a near infrared region and can effectively reduce the temperature of a black back plate, but in an outdoor aging resistance test, the pigment is found to have bleeding and migration, and the pigment migrates into EVA (ethylene vinyl acetate) glue bonded with the pigment.
Disclosure of Invention
The invention aims to provide a black high-reflection fluorocarbon two-component coating, a preparation method and an application thereof on a photovoltaic panel, and 1) the reflectivity of a near infrared region (760 nm-1200 nm) is improved on the premise of keeping the color of the fluorocarbon coating black (the values of a and b are basically consistent in a visible light region L of 380nm-760 nm). 2) Solves the problems of color bleeding and migration of the organic black pigment.
In order to solve the technical problems, the invention provides a black high-reflection fluorocarbon two-component coating which comprises a component A and a component B in percentage by mass, wherein the component A is a black coating, and the component B is an isocyanate curing agent;
the component A comprises the following components in percentage by weight: 40-45% of FEVE fluorocarbon resin; 15-20% of a solvent; 30-35% of dark green metal oxide mixed-phase pigment; 2-4% of high-weatherability red pigment; 0.5 to 1 percent of coupling agent; 0.3 to 0.5 percent of dispersant; 0.3 to 0.5 percent of flatting agent; 0.2 to 0.3 percent of defoaming agent; 0.5 to 1 percent of anti-settling agent;
the component B comprises the following components in percentage by weight: 55-65% of isocyanate curing agent; 35-45% of a solvent; 0.02-0.04% of drier.
Preferably, the FEVE fluorocarbon resin is solvent type polyether fluorocarbon resin, mainly comprises a random copolymer of chlorotrifluoroethylene or tetrafluoroethylene and other vinyl ether monomers, wherein the fluorine content is more than or equal to 25 percent, the solid content is more than or equal to 50 percent, the hydroxyl content of the liquid resin is 25 +/-3 mgkoH/g, and the acid value is 1.5 +/-0.5 mgkoH/g.
Preferably, the solvent is one or a mixture of butyl acetate, propylene glycol methyl ether acetate and xylene.
Preferably, the dark green metal oxide mixed-phase pigment is an environment-friendly, non-toxic and high-temperature-resistant high-performance inorganic pigment which is generated by high-temperature sintering and curing reaction of a plurality of metal oxides such as cobalt oxide, silicon dioxide, aluminum oxide or zinc oxide.
Preferably, the high weather resistance red pigment is one or a mixture of two of perylene bright purple red and 122 quinacridone red.
Preferably, the coupling agent is an organosilane coupling agent, the dispersing agent is a copolymer solution of a polyhydroxy acid polymer and polysiloxane, the leveling agent is an acrylate copolymer solution, the defoaming agent is a fluorine modified silicone copolymer solution, and the anti-settling agent is a polyamide wax anti-settling agent.
Preferably, the isocyanate curing agent is a diisocyanate or a trimer of a polyisocyanate, and the drier is dibutyltin dilaurate (T-12).
The invention also provides the following technical scheme: a preparation method of a black high-reflection fluorocarbon two-component coating comprises the following steps:
(1) Preparing a coating A component: preparing raw materials according to the formula amount of the component A, adding FEVE fluorocarbon resin into a container, respectively adding an anti-settling agent, a defoaming agent, a dispersing agent, a coupling agent and a solvent under the condition of stirring at a low speed of 600r/min, uniformly dispersing, then adding a high-weather-resistance red pigment and a dark green metal oxide miscible pigment, uniformly stirring and mixing, grinding by a sand mill until the fineness is less than or equal to 10 mu m, and discharging to serve as the component A for later use;
(2) Preparing a coating B component: preparing raw materials according to the formula amount of the component B, adding a solvent and a drier into an isocyanate curing agent, and uniformly stirring to obtain the component B of the coating for later use.
The invention also provides the following technical scheme: the black photovoltaic back plate is prepared by coating the black high-reflection fluorocarbon two-component coating on two sides of a photovoltaic back plate substrate.
Preferably, the preparation of the black photovoltaic back sheet comprises the following steps:
(1) Preparing a component A and a component B of the black high-reflection fluorocarbon two-component coating;
(2) The photovoltaic backboard substrate is a polyethylene terephthalate film (PET film);
(3) Uniformly mixing the component A and the component B according to a mass ratio of 8-10, then blade-coating the mixture on a photovoltaic backboard substrate, forcibly drying and curing the mixture through a temperature gradient tunnel oven at 60-150 ℃, cooling and rolling the mixture;
(4) And after one side of the photovoltaic backboard substrate is coated, the other side is scraped according to the same operation steps, and the black photovoltaic backboard with double-side coating is obtained.
Compared with the existing black coating, the black high-reflection fluorocarbon coating has the following beneficial effects on the premise of keeping the color appearance, the physical and mechanical properties and the environmental adaptability of the original black coating:
(1) The high reflectivity of the black fluorocarbon coating in a near-infrared band (760 nm-1200 nm) is realized, the near-infrared reflection factor is more than 60 and far exceeds the near-infrared reflection factor of the existing coating which is less than or equal to 20, the absorptivity of the black coating in the near-infrared band under solar radiation can be effectively reduced, and the surface temperature is reduced.
(2) Compared with a black coating adopting a high-reflection organic black pigment, the black high-reflection coating has small difference of near-infrared reflection factors, but solves the problems of color bleeding and pigment migration of the coating and EVA glue after the coating is aged artificially and accelerated.
Drawings
FIG. 1 is a graph of spectral reflectance for examples 1-3 of the present invention and comparative examples 1-2; in the figure, (1) shows example 1, (2) shows example 2, (3) shows example 3, (4) shows comparative example 1, and (5) shows comparative example 2.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example 1:
the embodiment provides a black high-reflection fluorocarbon two-component coating, which adopts the raw materials and formula shown in table 1, wherein FEVE fluorocarbon resin is JF-3X resin of Shanghai Dong fluorine chemical engineering Co., ltd; the solvent is a mixture of butyl acetate, propylene glycol monomethyl ether acetate and xylene in a mass ratio of 1; the dark green metal oxide miscible pigment adopts 410 dark green of Xue Te of the United states; the red high-weatherability pigment adopts Kelain perylene brilliant purple L3920 and Kelain 122 quinacridone red; the coupling agent is Kh550 organosilane; the dispersant is BYK-P-104s of BYK company; the leveling agent is BYK358N of BYK company; the defoaming agent is BYK066N of BYK company; the isocyanate curing agent is Cosichu HDI tripolymer N3390; the drier is dibutyltin dilaurate, and the supplier is Jiangsu Runfeng synthetic science and technology limited company; the anti-settling agent is Haimax 229 polyamide wax.
In this example, preparation of component a: preparing raw materials according to the formula of table 1, adding fluorocarbon resin into a container, respectively adding an anti-settling agent, a defoaming agent, a leveling agent, a dispersing agent, a coupling agent and a solvent under the condition of slow stirring (600 r/min), adding a high-weather-resistance red pigment and a dark green metal oxide miscible pigment after uniform dispersion, grinding the mixture by a sand mill until the fineness is less than or equal to 10 mu m after uniform stirring, and discharging the mixture to be used as a component A for later use. Preparation of component B in this example: according to the formula shown in the table 1, a solvent and a drier are added into an isocyanate curing agent N3390, and the mixture is uniformly stirred to obtain a coating B component for later use.
The preparation method of the black photovoltaic back plate in the embodiment comprises the following steps:
(1) Preparing a component A and a component B of the high-reflection fluorocarbon two-component coating;
(2) The back plate substrate is a polyethylene terephthalate film (PET film);
(3) Uniformly mixing the component A and the component B according to a mass ratio of 10 to 1, then blade-coating the mixture on a back plate substrate, controlling the thickness of a wet film to be about 10 mu m and the thickness of a dry film to be about 5 mu m, forcibly drying and curing the mixture through a temperature gradient tunnel oven at 60-150 ℃, cooling and rolling the mixture.
And after one side of the photovoltaic back plate is coated, the other side is scraped according to the same operation steps, and the black photovoltaic back plate with double-side coating is obtained.
Example 2:
the embodiment provides a black high-reflection fluorocarbon two-component coating, and the adopted raw materials and the formula are shown in table 1. The dark green metal oxide miscible pigment adopts Jiangyin Aidida 6214-3; the red weather-resistant pigment adopts red 179 and 122-003 of Aidi in the river-yin;
the preparation methods of other raw materials and coatings and the preparation method of the black photovoltaic back plate are the same as those in example 1.
Example 3:
the embodiment provides a black high-reflection fluorocarbon two-component coating, and the adopted raw materials and the formula are shown in table 1. The dark green metal oxide mixed-phase pigment adopts Shanghai praise YS418; the red high-weatherability pigment adopts Jiangyin Aidi 122-004 mauve.
The preparation methods of other raw materials and coatings and the preparation method of the black photovoltaic back plate in the embodiment are the same as those in embodiment 1.
Comparative example 1:
the comparative example provides a black fluorocarbon two-component coating, and the adopted raw materials and the formula are shown in table 1. The pigment of this comparative example was an iron chromium black pigment which is conventional in the market at present, unlike examples 1, 2 and 3.
The preparation methods of other raw materials and the coating of the comparative example and the preparation method of the black photovoltaic back plate are the same as those of example 1.
Comparative example 2:
the comparative example provides a black fluorocarbon two-component coating, and the adopted raw materials and the formula are shown in table 1. The pigment of this comparative example was an organic black high reflective P32 black pigment, unlike examples 1, 2 and 3.
The preparation method of other raw materials and the coating of the comparative example is the same as that of example 1, and the component A in the preparation of the black photovoltaic back panel is as follows: the component B is 8:1, and the other preparation methods are the same as example 1.
Table 1: raw material formulation tables of examples 1 to 3 and comparative examples 1 to 2
Table 2: performance test Table for related items of the black photovoltaic back sheets of examples 1 to 3 and comparative examples 1 to 2
The test data of the above examples and comparative examples show that the coating color is substantially consistent to black (L value is in the range of 26 + -1,a value is in the range of 0 + -1,b value is in the range of 0 + -1), the near infrared reflection factor of examples 1, 2 and 3 is > 60, and the coating does not bleed and migrate, thus achieving the purpose of the invention.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. The black high-reflection fluorocarbon double-component coating is characterized by comprising a component A and a component B according to the following mass percentage, wherein the component A is black coating, and the component B is isocyanate curing agent;
the component A comprises the following components in percentage by weight: 40-45% of FEVE fluorocarbon resin; 15-20% of a solvent; 30-35% of dark green metal oxide mixed-phase pigment; 2-4% of high-weather-resistance red pigment; 0.5 to 1 percent of coupling agent; 0.3 to 0.5 percent of dispersant; 0.3 to 0.5 percent of flatting agent; 0.2 to 0.3 percent of defoaming agent; 0.5 to 1 percent of anti-settling agent;
the component B comprises the following components in percentage by weight: 55-65% of isocyanate curing agent; 35-45% of a solvent; 0.02-0.04% of drier.
2. The black high-reflective fluorocarbon two-component coating according to claim 1, wherein the FEVE fluorocarbon resin is solvent type polyether fluorocarbon resin, mainly comprising chlorotrifluoroethylene or tetrafluoroethylene and random copolymer of other vinyl ether monomers, fluorine content is not less than 25%, solid content is not less than 50%, hydroxyl content of liquid resin is 25 ± 3mgkoH/g, acid value is 1.5 ± 0.5mgkoH/g.
3. The black high-reflection fluorocarbon two-component coating as claimed in claim 1, wherein the solvent is one or a mixture of butyl acetate, propylene glycol methyl ether acetate and xylene.
4. The black highly reflective fluorocarbon two-component coating according to claim 1, wherein the dark green metal oxide mixed phase pigment is an environment-friendly, non-toxic, high temperature resistant, high performance inorganic pigment produced by high temperature sintering and curing reaction of a plurality of metal oxides of cobalt oxide, silicon dioxide, aluminum oxide or zinc oxide.
5. The black highly reflective fluorocarbon two-component coating of claim 1, wherein the highly weatherable red pigment is one or a mixture of perylene bright purple red and 122 quinacridone red.
6. The black highly reflective fluorocarbon two-component coating according to claim 1, wherein the coupling agent is an organosilane coupling agent, the dispersing agent is a solution of a polycarboxylic acid polymer and a polysiloxane copolymer, the leveling agent is an acrylate copolymer solution, the defoaming agent is a fluorine modified silicone copolymer solution, and the anti-settling agent is a polyamide wax anti-settling agent.
7. The black high reflective fluorocarbon two-component coating of claim 1, wherein the isocyanate curing agent is a trimer of diisocyanate or polyisocyanate and the drier is dibutyltin dilaurate (T-12).
8. The preparation method of the black high-reflection fluorocarbon two-component coating according to any one of claims 1 to 7, comprising the following steps:
(1) Preparing a coating A component: preparing raw materials according to the formula amount of the component A, adding FEVE fluorocarbon resin into a container, respectively adding an anti-settling agent, a defoaming agent, a dispersing agent, a coupling agent and a solvent under the condition of stirring at a low speed of 600r/min, adding a high-weather-resistance red pigment and a dark green metal oxide miscible pigment after uniform dispersion, grinding the mixture by a sand mill until the fineness is less than or equal to 10 mu m after uniform stirring and mixing, and discharging the mixture to be used as the component A for later use;
(2) Preparing a coating B component: preparing raw materials according to the formula amount of the component B, adding a solvent and a drier into an isocyanate curing agent, and uniformly stirring to obtain the component B of the coating for later use.
9. The use of a black highly reflective fluorocarbon two-component coating according to any one of claims 1 to 7 in a photovoltaic panel, wherein the black photovoltaic back sheet is made by coating the black highly reflective fluorocarbon two-component coating on both sides of a photovoltaic back sheet substrate.
10. The application of the black high-reflection fluorocarbon two-component coating on the photovoltaic panel as claimed in claim 9, wherein the preparation of the black photovoltaic back panel comprises the following steps:
(1) Preparing a component A and a component B of the black high-reflection fluorocarbon two-component coating;
(2) The photovoltaic backboard substrate is a polyethylene terephthalate film (PET film);
(3) Uniformly mixing the component A and the component B according to a mass ratio of 8-10, then blade-coating the mixture on a photovoltaic backboard substrate, forcibly drying and curing the mixture through a temperature gradient tunnel oven at 60-150 ℃, cooling and rolling the mixture;
(4) And after one side of the photovoltaic backboard substrate is coated, the other side is scraped according to the same operation steps, and the black photovoltaic backboard with double-side coating is obtained.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116355451A (en) * | 2023-05-30 | 2023-06-30 | 苏州弘道新材料有限公司 | High-reflection coating liquid and preparation method thereof |
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| CN103923506A (en) * | 2014-04-12 | 2014-07-16 | 北京工业大学 | Black infrared reflection pigment and preparation method thereof |
| CN109713069A (en) * | 2018-12-21 | 2019-05-03 | 苏州赛伍应用技术股份有限公司 | A kind of black high reflection solar cell backboard and preparation method thereof |
| CN109983100A (en) * | 2016-11-22 | 2019-07-05 | 阿克伦大学 | For generating the self assembly melanin particle of color |
| CN111682083A (en) * | 2020-06-01 | 2020-09-18 | 苏州明冠新材料科技有限公司 | High-reflectivity black solar cell back plate and preparation method thereof |
| CN115477875A (en) * | 2022-10-10 | 2022-12-16 | 江苏中来新材科技有限公司 | Black radiation cooling functional coating, manufacturing method, back plate and application |
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- 2022-12-19 CN CN202211632321.4A patent/CN115806757A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103923506A (en) * | 2014-04-12 | 2014-07-16 | 北京工业大学 | Black infrared reflection pigment and preparation method thereof |
| CN109983100A (en) * | 2016-11-22 | 2019-07-05 | 阿克伦大学 | For generating the self assembly melanin particle of color |
| CN109713069A (en) * | 2018-12-21 | 2019-05-03 | 苏州赛伍应用技术股份有限公司 | A kind of black high reflection solar cell backboard and preparation method thereof |
| CN111682083A (en) * | 2020-06-01 | 2020-09-18 | 苏州明冠新材料科技有限公司 | High-reflectivity black solar cell back plate and preparation method thereof |
| CN115477875A (en) * | 2022-10-10 | 2022-12-16 | 江苏中来新材科技有限公司 | Black radiation cooling functional coating, manufacturing method, back plate and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116355451A (en) * | 2023-05-30 | 2023-06-30 | 苏州弘道新材料有限公司 | High-reflection coating liquid and preparation method thereof |
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