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Adhesive composition used for solar energy and preparation method thereof

A composition and solar backsheet technology, applied in the field of solar cells, can solve the problems of not being able to cooperate well, the adhesion of the polyester film, and insufficient adhesion, etc., to achieve good environmental erosion resistance and improve photoelectric conversion efficiency , The effect of short process

Active Publication Date: 2017-05-17
苏州瀚海新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General polyester adhesives have insufficient adhesion to PVF (polyvinyl fluoride) and EVA (ethylene-vinyl acetate copolymer) films, and acrylic resins have good adhesion to PVF (polyvinyl fluoride) films and EVA films, but However, the adhesion to polyester film is average, and the compatibility between general polyester adhesive and acrylic resin is poor, so it cannot be used well.

Method used

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  • Adhesive composition used for solar energy and preparation method thereof

Examples

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Effect test

example 1

[0020] 1) Preparation of polyester modified acrylic resin:

[0021] Dissolve 3.64kg of 2-methylene-1,3-dioxepane, 3.9kg of butyl methacrylate, 7.22kg of trifluoroethyl methacrylate and 16g of initiator azobisisobutyronitrile in 50L of toluene , added to the reactor, mixed evenly, and then under the protection of nitrogen, the temperature was raised to 60-70 ° C for 2 hours. Precipitate and purify with n-hexane, and dry in vacuum to obtain a polyester-modified acrylic resin.

[0022] 2), the preparation of polyester resin:

[0023] Put 1.66kg of terephthalic acid, 4.15kg of isophthalic acid, 12.2kg of azelaic acid, 3.4kg of ethylene glycol, 8.8kg of 1,6-hexanediol, and 4.4g of isopropyl titanate into the reactor. Replace the exhausted air with nitrogen, stir and raise the temperature to 220-255°C for reaction. When the by-product reaches the theoretical value, the temperature is raised to keep the reaction temperature between 250-280°C, and the polymerization is reduced unde...

example 2

[0026] 1) Preparation of polyester modified acrylic resin:

[0027] 4.56 kg 2-methylene-1,3-dioxepane, 2.52 kg trifluoroethyl methacrylate, 6.36 kg lauryl methacrylate, 4.17 kg isobornyl acrylate and 16 g initiator azo Dissolve diisobutyronitrile in 50L of toluene, add it into the reaction kettle, mix well, and then raise the temperature to 60-70°C for 2 hours under the protection of nitrogen. Precipitate and purify with n-hexane, and dry in vacuum to obtain a polyester-modified acrylic resin.

[0028] 2), the preparation of polyester resin:

[0029] Put 2.49kg terephthalic acid, 2.58kg 1,4-cyclohexanedicarboxylic acid, 10.2kg adipic acid, 3.7kg ethylene glycol, 7.3kg neopentyl glycol, 4.4g isopropyl titanate into the reactor middle. Replace the exhausted air with nitrogen, stir and raise the temperature to 220-255°C for reaction. When the by-product reaches the theoretical value, the temperature is raised to keep the reaction temperature between 250-280°C, and the polymer...

example 3

[0032] 1) Preparation of polyester modified acrylic resin:

[0033] 5.13kg2-methylene-1,3-dioxepane, 3.1kg butyl methacrylate, 3.6kg lauryl acrylate, 4.17kg isobornyl acrylate and 16g initiator azobisisobutyronitrile, Dissolve it in 50L of toluene, add it to the reaction kettle, mix well, and then raise the temperature to 60-70°C for 2 hours under the protection of nitrogen. Precipitate and purify with n-hexane, and dry in vacuum to obtain a polyester-modified acrylic resin.

[0034] 2), the preparation of polyester resin:

[0035] Put 1.66kg of terephthalic acid, 5.8kg of isophthalic acid, 10.3kg of azelaic acid, 3.7kg of ethylene glycol, 7.3kg of neopentyl glycol, and 5.6g of dibutyltin oxide into the reaction kettle. Replace the exhausted air with nitrogen, stir and raise the temperature to 220-255°C for reaction. When the by-product reaches the theoretical value, raise the temperature to keep the reaction temperature between 250-280°C, reduce the pressure and compress, ...

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Abstract

The invention provides an adhesive composition used for a solar backboard. The adhesive composition is prepared from the following components in percentage by weight: 30% to 50% of polyester modified acrylic resin, 30% to 45% of polyester resin and 5% to 40% of an isocyanate curing agent. 2-methylene-1,3-dioxocycloheptane is used for being reacted with an acrylic monomer, so that modified acrylic resin of which a main chain contains more ester bonds is obtained; the modified acrylic resin can be preferably compatible with polyester, the modified acrylic resin and the polyester are cooperatively used, and the adhesive force of the adhesive for PET films, PVF films or EVA films simultaneously can be greatly improved, so that the using performance of the backboard adhesive is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to an adhesive composition for solar back panels and a preparation method thereof. Background technique [0002] In solar cells, the back protection sheet (back sheet) is usually placed on the back of the solar cell to protect and support the solar cell unit, and has weather resistance, water resistance, heat resistance, moisture barrier and gas barrier properties And other excellent physical properties, effectively prevent the influence of media, especially water, oxygen, corrosive gas and liquid, etc. on solar cells, thereby reducing the degree of degradation of solar cell performance and prolonging the life of solar cells. [0003] Currently commonly used backplane structures include TPT structure and TPE structure, among which, TPT structure refers to PVF (polyvinyl fluoride) film / PET (polyethylene terephthalate) film / PVF (polyvinyl fluoride) film structure The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/16C09J133/10C09J129/10C09J167/02C08F220/22C08F220/18C08F216/16C08G63/183C08G63/199H01L31/048
CPCC08F216/16C08F220/18C08F220/1812C08F220/22C08G63/183C08G63/199C08L2203/204C08L2203/206C09J129/10C09J133/10C09J133/16H01L31/0481C08L67/02C08F220/1804Y02E10/50
Inventor 许峰黄志远付静刘义
Owner 苏州瀚海新材料有限公司
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