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Environment-friendly fluorine coating for solar battery back plate

A technology for solar cells and fluorine coatings, applied in coatings, circuits, photovoltaic power generation, etc., can solve the problems of inability to balance the weather resistance and adhesion of fluorine coatings, and solve the problems of weather resistance and adhesion, increase weather resistance, Easy-to-use effects

Active Publication Date: 2018-03-09
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an environmentally friendly fluorine coating for solar battery backplanes. The fluorine coating has excellent adhesion to the substrate used in the backplane, no primer is needed, and the preparation process is simple. , which solves the problem that the weather resistance and adhesion of fluorine coatings cannot be balanced

Method used

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  • Environment-friendly fluorine coating for solar battery back plate

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preparation example Construction

[0027] The preparation method of the aqueous functionalized vinylidene fluoride emulsion is to add fluorine-containing acrylic acid monomer, vinyl monomer, and vinylidene fluoride gas-phase monomer into the autoclave by weight ratio, and add an initiator, such as peroxide Diisopropyl dicarbonate was reacted in ethyl acetate solvent at 40°C for 15 hours, cooled to room temperature to complete the reaction to obtain a functionalized vinylidene fluoride resin, which was added with a neutralizing agent such as triethylamine, deionized The water is stirred and emulsified at a high speed, and finally the solvent ethyl acetate is distilled off under reduced pressure to obtain a water-based functionalized vinylidene fluoride emulsion.

[0028] The fluorine coating provided by the present invention also includes a water-based curing agent, which is one or more selected from hydrophilic aliphatic polyisocyanates, such as Bayer curing agent XP-2700, Kangrui Easaqua XL600, the water-based ...

Embodiment 1

[0034] Aqueous functionalized vinylidene fluoride emulsion, composed of 10g vinylidene fluoride monomer, 20g hexafluoroisopropyl acrylate, 58g ethyl acrylate, 4.2g methyl methacrylate, 1.3g methacrylic acid, 6.5g hydroxymethacrylate Propyl ester monomers are copolymerized, of which vinylidene fluoride monomers account for 10% of the total mass of the resin, the fluorine content is 15%, the hydroxyl value is 25mgKOH / g, the acid value is 8mgKOH / g, and the solid content of the emulsion is 45%.

[0035]Weigh 50g of the above water-based functionalized vinylidene fluoride emulsion, 0.2g of wetting and dispersing agent BYK190, 0.2g of defoamer DC-650.2g, 22.5g of titanium dioxide R706, after high shear dispersion, then weigh 4.4g of curing agent XP-27000 , Bayer, Germany; deionized water 22.5g, leveling agent BYK 3455 0.2g to prepare fluorine coatings.

[0036] Coating the paint on both sides of the PET base material, and drying at 135° C., to obtain a solar battery back sheet.

Embodiment 2

[0038] Aqueous functionalized vinylidene fluoride emulsion, made by copolymerization of 18g vinylidene fluoride, 16g hexafluoroisopropyl acrylate, 50g butyl acrylate, 7.4g methyl methacrylate, 1.4g acrylic acid, 7.2g hydroxybutyl acrylate monomer The vinylidene fluoride monomer content accounts for 18% of the total mass of the resin, the fluorine content is 18%, the hydroxyl value is 28mgKOH / g, the acid value is 9mgKOH / g, and the solid content of the emulsion is 47%.

[0039] Weigh 50g of the above emulsion, 25.8g of titanium dioxide R706, 0.3g of wetting and dispersing agent BYK190, 50.2g of defoamer DC-6, after high shear dispersion, then weigh 5.6g of curing agent XP-2700, Bayer, Germany, deionized Water 17.8g, leveling agent BYK3455 0.3g to prepare fluorine coating.

[0040] The paint is coated on the PET substrate, dried at 135°C, and then the uncoated PET surface is compounded with PE with a polyurethane adhesive to obtain a solar battery back sheet.

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Abstract

The invention discloses an environment-friendly fluorine coating for a solar battery back plate. The environment-friendly fluorine coating comprises an aqueous functionalized vinylidene fluoride emulsion, wherein the aqueous functionalized vinylidene fluoride emulsion is prepared from a resin consisting of a vinylidene fluoride monomer, a fluorine-containing acrylic monomer and a vinyl monomer ina copolymerization manner. The environment-friendly fluorine coating disclosed by the invention is excellent in adhesive property with PET (Polyethylene Terephthalate), free of primer and simple in preparation process, and the problem that the weather resistance and the adhesive property of a fluorine coating cannot be both taken into account is solved.

Description

technical field [0001] The invention relates to a solar cell coating, in particular to an environment-friendly fluorine coating for a solar cell backboard. Background technique [0002] Solar cells have been widely used. Since the crystalline silicon wafers of solar cells are easily corroded by water vapor and oxygen, they need to be protected by solar cell backplanes. Solar battery backsheets coated with environmentally friendly coatings have become the focus of research in recent years due to their environmental protection advantages. [0003] The existing commercialized water-based PVDF, FEVE, and fluorine-containing acrylic coatings can be used in interior and exterior wall coatings, steel structure decoration and anti-corrosion coatings. Due to low adhesion to the substrate, they can only be used as topcoats. Due to the low hardness of the coating formed by the above paint, poor resistance to butanone wiping, and poor adhesion to the substrate PET for the back sheet, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D133/14C09D7/61C08F220/18C08F220/24C08F214/22C08F220/06C08F220/14C08F220/20C08F218/10C08F218/08B32B27/32B32B27/36B32B27/08B32B7/12B32B33/00H01L31/049C08L67/02
CPCB32B7/12B32B27/08B32B27/32B32B27/36B32B33/00B32B2255/10B32B2255/26C08F220/18C08J7/04C08J2367/02C08J2433/14C08F220/1804H01L31/049C08F220/24C08F214/22C08F220/06C08F220/14C08F220/20C08F218/10C08F218/08Y02E10/50
Inventor 顾丽争杨辉胡亚召刘芳李茜茜李华锋柳青
Owner 乐凯胶片股份有限公司
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