Coating for solar cell back plates

A technology of solar cells and coatings, applied in the field of coatings, can solve the problems of incompatibility of weather resistance and adhesion of fluorine coatings, and achieve the effects of solving the incompatibility of weather resistance and adhesion, simplifying the process, and excellent adhesion

Active Publication Date: 2019-05-10
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

[0005] In order to solve the above problems, the present invention provides a kind of coating for solar battery back sheet, the back sheet made by said coating has good ultraviolet resistance performance, especially after heat and humidity aging, it can still maintain a good level of cohesive force, which solves the problem of fluorine The problem that the weather resistance and adhesion of the coating cannot be balanced

Method used

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  • Coating for solar cell back plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The synthetic method of acrylic resin: 11.4g methyl acrylate, 81g butyl acrylate, 0.3g hydroxyethyl methacrylate, 4.3g glycidyl methacrylate, 100g toluene, add to a cooling tube, stirring device, thermometer nitrogen Into the four-necked flask with the introduction tube, add 0.08 g of the initiator azobisisobutyronitrile to react for 6 hours. Then add 0.03g of hydroquinone, 0.8g of dimethylbenzylamine, and 2.2g of acrylic acid, and stir at 100°C for 15h until the acid value is as low as 0.1mgKOH / g. Finally obtain acrylic resin with hydroxyl and double bonds, wherein the molar ratio of side chains containing carbon-carbon double bonds in the resin segment to the total side chains is 0.03, the hydroxyl value is 1mgKOH / g, the molecular weight of acrylic resin is 6000, and the solid content is 50 % acrylic resin solution.

[0029] Fluorocarbon coating for solar backplane, consisting of 22g GK570 solution, 7.3g of the above-mentioned acrylic resin solution, 21.7g of titaniu...

Embodiment 2

[0032] The preparation method of acrylic resin: 15.4g methyl acrylate, 76.8g butyl acrylate, 2.7g hydroxyethyl acrylate, 2.8g glycidyl methacrylate, 100g toluene, add to the tank with cooling tube, stirring device, thermometer nitrogen introduction Into the four-neck flask of the tube, add initiator azobisisobutyronitrile 0.08g to react for 4h. Then add 0.03 g of hydroquinone, 0.8 g of dimethylbenzylamine, and 1.5 g of acrylic acid, and stir at 100° C. for 15 h. Finally obtain acrylic resin with hydroxyl and double bonds, wherein the molar ratio of side chains containing carbon-carbon double bonds in the resin segment to the total side chains is 0.02, the hydroxyl value is 13 mg KOH / g, the molecular weight of acrylic resin is 9000, and the solid content is 50 % acrylic resin solution.

[0033]Fluorocarbon coatings for solar back panels, consisting of 24g Changxing 41011 resin solution, 7.2g of the above-mentioned acrylic resin solution, 22.5g of titanium dioxide R706, 0.1g of...

Embodiment 3

[0036] Preparation of acrylic resin: 12.7g methyl methacrylate, 79.2g butyl methacrylate, 5.8g hydroxypropyl acrylate, 1.5g glycidyl methacrylate, 100g toluene, add to a cooling tube, stirring device, Azobisisobutyronitrile was added into a four-necked flask with a nitrogen introduction tube for a thermometer to react for 4 hours. Then add 0.03g of hydroquinone, 0.8g of dimethylbenzylamine, and 0.8g of acrylic acid, stir at 100°C for 15h, and finally obtain an acrylic resin with hydroxyl and double bonds. The molar ratio of side chains containing carbon-carbon double bonds in the total side chains in the resin segment is 0.02, the hydroxyl value is 20 mg KOH / g, the molecular weight of the acrylic resin is 12000, and the acrylic resin solution has a solid content of 50%.

[0037] Fluorocarbon coating for solar backplane, consisting of 19g of GK570 solution, 8.2g of the above-mentioned acrylic resin solution, 20.5 of titanium dioxide R706, 0.4g of leveling agent BYK310, 0.4g of ...

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Abstract

The invention relates to coating for solar cell back plates. The coating comprises, by mass percentage, 9.2-14.4% of fluorocarbon resin, 3.6-9.2% of acrylic resin, 20.5-25.3% of pigment, 37.6-48.1% ofsolvent, 0.6-1% of auxiliaries and an isocyanate curing agent, wherein the mole ratio of hydroxyl in the fluorocarbon resin and the acrylic resin to the isocyanate in the curing agent is 0.8-1.6, andthe total mass percentage of the components is 100%. The coating has the advantages that the coating is good in interlayer performance, a coating layer after hydrothermal aging is good in bonding force with EVA, and the problem that fluorocoating cannot give consideration to both weather resistance and cohesiveness is solved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to coatings for solar back panels. Background technique [0002] Solar energy is widely used due to its clean and renewable advantages, among which the most widely used is solar cell power generation. The structure of the solar cell is glass-EVA-cell-back sheet. The back sheet is located on the outermost layer of the back of the solar cell and is the most important part of the solar cell. It not only plays the role of packaging, but also protects the solar cell from damage Affected by water vapor, oxygen and ultraviolet rays in the environment, the backsheet must have good resistance to ultraviolet rays, heat and humidity, corrosion, cold and heat, and high temperature. [0003] The backplane is mainly composed of a three-layer structure, which is a weather-resistant layer, an insulating layer, and an adhesive layer from outside to inside. As battery manufacturers have higher and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D127/18C09D7/61C08F220/14C08F220/18C08F220/20C08F220/32C08F220/06C08G18/62C08J7/04H01L31/049
CPCY02E10/50
Inventor 顾丽争柳青李华锋王小记杨辉胡亚召
Owner 乐凯胶片股份有限公司
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