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A kind of coating for solar battery backplane

A technology for solar cells and back sheets, applied in the field of coatings, can solve the problems of high energy consumption, poor adhesion and UV resistance, and inability to directly apply back sheets, etc., and achieves good initial adhesion and good adhesion.

Active Publication Date: 2021-08-17
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

[0003] At present, the outer coating of the solar battery backplane is generally cured by fluorocarbon coating. The initial curing of the fluorocarbon coating needs to be baked at a high temperature above 150°C for about 1 minute, which is not only time-consuming, but also consumes a lot of energy.
UV coating is a fast-curing coating, but its adhesion and UV resistance after humid heat aging are poor, so it cannot be directly applied to the backplane

Method used

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  • A kind of coating for solar battery backplane
  • A kind of coating for solar battery backplane
  • A kind of coating for solar battery backplane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The A component used in the present invention includes 10g of polyurethane acrylic resin, 25g of butyl acrylate, hydroxyethyl methacrylate, 1,4-butanediol diacrylate, 25g of trifluoro FEVE resin, 20g of titanium dioxide R706, catalyst dilaurel Dibutyl tin acid 0.02g, leveling agent BYK310 0.3g, wetting and dispersing agent BYK-2000 0.5g, photoinitiator 1173 0.38g, butyl ester, ethyl ester 18.8g; take the above A component, B component is N3390, According to the molar ratio of NCO and hydroxyl group being 0.6, 3 g was weighed and prepared into a coating.

[0055]The coating is also used for the repair paint of the solar back panel. Apply the coating to the scratched part of the vinylidene fluoride film on the weather-resistant surface of the back panel, and irradiate it with a UV lamp with a power of 1000W for 15 seconds. After fast surface drying and curing, Place it naturally at room temperature until it is completely cured to obtain a backplane repair coating.

Embodiment 2

[0057] The A component used in the present invention includes 15g of epoxy acrylic resin, 20g of isodecyl acrylate, tetrahydrofuryl methyl methacrylate, 20g of hydroxyethyl methacrylate, 22g of trifluoro FEVE resin, 25g of titanium dioxide R706, catalyst dilaurate di 0.02g of butyl tin, 0.2g of leveling agent Tego Glide 450, 0.6g of wetting and dispersing agent BYK-2000, 1840.38g of photoinitiator, 16.8g of ethyl ester and xylene solvent. Take the above-mentioned A component, B component is E3370, weigh 5g according to the molar ratio of NCO and hydroxyl group is 0.8, and prepare solar backboard coating.

[0058] The coating is coated on the PET base material for solar backsheets, irradiated with a 1000W UV lamp for 20 seconds, and is quickly surface-dried. After curing and molding, it is placed at 55°C for 3 days. After curing is complete, the coating of the backsheet is obtained.

Embodiment 3

[0060] The polyurethane acrylic resin 20g that the present invention uses, isooctyl acrylate, hydroxyethyl methacrylate, diethylene glycol diacrylate 20g, tetrafluoro FEVE resin 17g, titanium dioxide R706 31g, ethyl ester, toluene 10.5g, catalyst Dibutyltin dilaurate 0.02g, leveling agent BYK310 0.38g, wetting and dispersing agent BYK-2009 0.7g, photoinitiator 1173 0.4g. Take the above-mentioned component A, and component B is E3370, weigh 5.6g according to the molar ratio of NCO and hydroxyl group of 1.2, and prepare the coating for solar backboard.

[0061] The coating is coated on the substrate PET for the back sheet, irradiated with a UV lamp for 25 seconds, quickly surface-dried, cured and formed, and placed naturally at room temperature. After curing is complete, the back sheet coating is obtained.

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Abstract

The invention discloses a coating for a solar battery back plate, which is composed of A component and B component, the composition and mass percentage of the A component are: 10-30% of acrylic resin, active diluent for photocuring 10‑25%, 10‑25% fluorine-containing copolymer, 20‑35% pigment, 10.5‑18.8% solvent, 1.1‑1.5% additive; the B component is an isocyanate curing agent, and the NCO group in the B component The molar ratio to the OH group in component A is 0.6‑1.2. The coating formed by the coating of the invention can be quickly surface-dried, which meets the requirement of quick-drying of the coating at normal temperature, and the fully cured coating has good adhesion and weather resistance to the back plate base material.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a coating for solar battery back plates. 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. Most solar cell backsheets adopt a three-layer structure, the middle layer is a support PET substrate, the inner adhesive layer is a polyolefin film or coating, and the outer layer is a fluorine film or coating. [0003] At present, the outer coating of the solar battery backplane is generally cured by fluorocarbon coating, and the initial curing of the fluorocarbon coating needs to be baked at a high temperature above 150° C. for about 1 minute, which is not only time-consuming, but also consumes a lot of energy. UV coating is a fast-curing coating, but its adhesion and UV resistance after humid heat aging are poor, so it ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D163/10C09D133/04C09D127/12C09D127/18C08J7/043H01L31/049C08L67/02
CPCC09D175/14C09D133/04C09D127/12H01L31/049C08J2367/02C08J2475/14C08J2463/10C08J2433/04C08J2427/12C08J2427/18C08K2003/2241C08J7/0427C08L75/14C08K3/22C08L27/18C08L63/10Y02E10/50
Inventor 顾丽争杨辉胡亚召刘芳李华锋柳青
Owner 乐凯胶片股份有限公司
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