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Modified hydrotalcite and solar battery back panel

A technology for solar cells and modified water, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of reducing the aging resistance of coatings, coating cracks, coating residues, etc., and achieve improved hydrolysis resistance and adhesion The effect of good performance and excellent flame retardancy

Active Publication Date: 2017-09-15
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the easy hydrolysis of polyurethane, the coating is used for the adhesive layer of the back sheet. After heat and humidity aging, the cross-linking density of the coating is destroyed, and the adhesion with the packaging film EVA drops sharply, and the coating is prone to residues on the surface. On EVA; Chinese patent document CN101792639A discloses a wear-resistant and scratch-resistant polyurethane coating, which is made of hydroxyacrylic acid, fluorocarbon resin, and polyester resin as the main resin, filled with nano-scale inorganic fillers, and cured with isocyanate. Coating, the introduction of its polyester resin reduces the aging resistance of the coating, and the difficulty in dispersing the nanoscale filler and the main resin causes the disadvantages of cracking of the coating

Method used

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  • Modified hydrotalcite and solar battery back panel
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Examples

Experimental program
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preparation example Construction

[0031] The preparation process of modified hydrotalcite is:

[0032] Dissolve a certain amount of modifier in ethanol, pour it into a three-necked flask, then dissolve Mg(NO3)2·6H2O in deionized water to obtain A solution (2mol·L-1), and Al(NO3)3· 9H2O was dissolved in deionized water to obtain B solution (3mol·L-1). Under magnetic stirring and N2 protection, solution A and solution B were slowly added dropwise to the three-necked flask respectively, and 2mol L-1NaOH solution was added dropwise at the same time, so that the pH of the reaction system was maintained at 10, reacted at room temperature for 48h, and the product was filtered , and dried in an oven after washing to obtain modified hydrotalcite.

[0033] The reagents for preparing hydrotalcite are all known commercially available products.

[0034] The preparation process of fluorine-containing coatings:

[0035] Add fluorocarbon resin, PUA resin, ethyl acetate, modified hydrotalcite (self-made) into a wide-mouth c...

Embodiment 1

[0048] Take 75.8mL of ethylene glycol methacrylate acetoacetate and dissolve it in 50mL of ethanol. As for the three-necked flask, add 25.8g of Mg(NO 3 ) 2 ·6H 2 O was dissolved in 40mL deionized water to obtain A solution (2mol L -1 ), 66.17g Al(NO 3 ) 3 9H 2 O was dissolved in 30mL deionized water to obtain B solution (3mol L -1 ). Under magnetic stirring and N 2 Under protection, slowly drop 37.5mL of solution A and 12.5mL of solution B into the three-necked flask, and at the same time add 2mol·L -1 NaOH solution to keep the pH of the reaction system at 10, and react at room temperature for 48 hours. The product was filtered, washed and dried in an oven to obtain ethylene glycol methacrylate acetoacetate modified hydrotalcite.

[0049] Add 200g fluorocarbon resin GK 570 (manufactured by Daikin Fluorochemical Co., Ltd., OH value 60mgKOH / g, solid content 60%), 36g PUA resin UV-2032 (Dongguan Inoue Chemical Technology Co., Ltd.), 195g acetic acid in a wide mouth contai...

Embodiment 2

[0052] Take 75.8mL of diacetone acrylamide and dissolve it in 50mL of ethanol. As for the three-necked flask, add 25.8g of Mg(NO 3 ) 2 ·6H 2 O was dissolved in 40mL deionized water to obtain A solution (2mol L -1 ), 66.17g Al(NO 3 ) 3 9H 2 O was dissolved in 30mL deionized water to obtain B solution (3mol L -1 ). Under magnetic stirring and N 2 Under protection, slowly drop 35mL of solution A and 23mL of solution B into the three-necked flask, and at the same time add 2mol·L -1 NaOH solution to keep the pH of the reaction system at 10, and react at room temperature for 48 hours. The product was filtered, washed and dried in an oven to obtain diacetoneacrylamide-modified hydrotalcite.

[0053] In a wide mouth container, add 200g fluorocarbon resin ETERFLON4101 (manufactured by Changxing Chemical Industry Co., Ltd., OH value is 56mgKOH / g, solid content 60%), 24g PUA resin JZ-302 (Nanjing Jiazhong Chemical Technology Co., Ltd.), 156g butyl acetate, 67g diacetone acrylami...

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Abstract

The invention provides preparation of an organic modified hydrotalcite and application of the organic modified hydrotalcite to a solar battery back panel. The solar battery back panel is excellent in hydrothermal aging resistance, fire resistance and barrier performance. The solar battery back panel is composed of a weather-resisting layer, an insulating layer and a fluorine-containing bonding coating, wherein the fluorine-containing bonding coating is formed by coating a fluorine-containing paint, which is prepared from fluorocarbon resin, the organic modified hydrotalcite, polyurethane acrylate (PUA) and isocyanate. By means of the modified hydrotalcite applied in the fluorine-containing bonding coating, the solar battery back panel is good in EVA (ethylene-vinyl acetate copolymer) initial bonding performance and hydrothermal-aged bonding performance and obtains excellent fire resistance, weather resistance and water vapor barrier property.

Description

technical field [0001] The invention relates to the modification of a hydrotalcite and its application on a solar battery backboard, in particular to a solar battery backboard with high adhesion to EVA, high weather resistance and high flame retardancy. Background technique [0002] Hydrotalcite, as a kind of layered double metal hydroxide with acid-base bifunctionality, can be modified inorganically or organically due to the exchangeability of anions between layers. It is widely used in flame retardant materials, catalysis, medicine and adsorption etc. A series of high-efficiency flame-retardant and smoke-suppressing new flame retardants can be prepared through the ion exchange of inorganic anions, such as borate or phosphate intercalation modified hydrotalcite; through the modification of organic anions, it is mainly concentrated in the application of drug carriers, such as water Cyclic acid, amino acids, captopril, ibuprofen, alkyl glycosides and other drug molecules are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J127/22C09J11/04C09J11/06C09J7/02C09D127/12C09D133/00C09D175/04C09D167/00C09D5/25H01L31/049
CPCC09D5/00C09D127/12C09D133/00C09D167/00C09D175/04C09J11/04C09J11/06C09J127/22C09J2203/322C09J2301/122C09J2301/414C09J2427/00C09J2429/00C09J2433/00C09J2467/006C09J2475/00H01L31/049C08L75/14C08K9/04C08K7/00Y02E10/50
Inventor 刘芳杨辉田勇董丽荣张伊玮邸喜强王莉李华锋柳青
Owner 乐凯胶片股份有限公司
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