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A kind of adhesive composition and solar cell back film

A composition and adhesive technology, applied in the field of solar cells, can solve the problems such as the loss of toughness and bonding performance of the adhesive, the inability to meet the low temperature resistance of the back film, and the inability to meet the low temperature resistance, so as to broaden the temperature adaptation range and improve the The effect of hydrolysis resistance and good mechanical properties

Active Publication Date: 2016-08-24
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

When the temperature is lower than -40°C, the adhesive used in the back film will become brittle and lose its toughness and bonding performance, which cannot meet the low temperature resistance, especially the environment of -70°C.
[0003] The commonly used adhesive for the back film of solar cells is a two-component polyurethane adhesive. The main agent mainly includes two types: polyester polyol or acrylic polyol. The low temperature resistance of the two types of polyols is poor, which cannot meet the long-term low temperature resistance requirements of the back film

Method used

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  • A kind of adhesive composition and solar cell back film
  • A kind of adhesive composition and solar cell back film
  • A kind of adhesive composition and solar cell back film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Adhesive formulation 1, consisting of 5g-2-hydroxypropyl acrylate, 55g ethyl acrylate, 15g ethyl methacrylate, 10g isobutyl methacrylate, 10g acryltrimethoxysilane, 5g γ-methacryloyl Silicone-modified acrylate polyol a1 formed by copolymerization of oxysilane at 70°C under the catalysis of 2g of azobisisobutyronitrile for 2 hours, with a molecular weight of 8000 and a weighed mass of 15g; Under the catalysis of 2.5g of oleum, the polymerization reaction is initiated by 2g of propylene glycol at -5°C, and after static layering, neutralization, filtration, vacuuming and other processes, polyether polyol a2 with a molecular weight of 6000 is obtained , weighed 3.5g; 33.6g of 1,6-diisocyanate hexane and 9g of 1,4 butanediol were catalyzed by 0.5ml of dibutyltin dilaurate, and reacted at 60°C for 4h to prepare isocyanate b. According to silicone modified acrylate polyol a1, the molar ratio of the hydroxyl group in polyether polyol a2 and the isocyanate group in isocyanate b ...

Embodiment 2

[0046] Adhesive formulation 2, composed of 8g-2-hydroxyethyl acrylate, 45g ethyl acrylate, 20g methyl acrylate, 15g isobutyl methacrylate and 12g vinyltrimethoxysilane at 80°C, 1.6g azobis Under the catalysis of isobutyronitrile, the organosilicon-modified acrylate polyol a1 with a molecular weight of 10,000 and a molecular weight of 10,000 obtained by reacting for 2.5 hours, weighed 18 g; 68 g of tetrahydrofuran monomer and 58 g of propylene oxide were catalyzed by 2.3 g of Lewis acid 1.6g of propylene glycol was used as an initiator to react for 3 hours at -5°C, and after static layering, neutralization, filtration, and vacuuming, a polyether polyol a2 with a molecular weight of 8000 was obtained, which was called Get 5g; Antioxidant is triphenyl phosphite, and quality is 0.5g, and anti-hydrolysis stabilizer is monomer carbodiimide, and content is 0.8g, and solvent is butyl acetate, acetone, and quality is 70.1g, by 33.6g of 1,6-diisocyanate hexane and 9g of 1,4 butanediol, ...

Embodiment 3

[0048] Adhesive formula 3, by 7g-2-hydroxyethyl acrylate, 50g ethyl acrylate, 18 methyl acrylate, 10 isobutyl methacrylate and 5g ethoxy polydimethylsiloxane, in 1.4g Initiated by ammonium sulfate, 80°C, copolymerization reaction for 3 hours to obtain silicone-modified acrylate polyol a1 with a molecular weight of 12,000, weighing 21g; Under the condition of 1.3g propylene glycol initiates the polymerization reaction, after static layering, neutralization, filtration, vacuumizing and other processes, the polyether polyol a2 with a molecular weight of 10000 is obtained, and 6.5g is weighed; the antioxidant is 2 , 6-di-tert-butyl, p-cresol phosphite triester, the mass is 1.4g, the hydrolysis stabilizer is silane coupling agent KH-570, the content is 1g, the solvent is the mixed solution of ethyl acetate and acetone, the mass is 64.2g; from 42g of 1,6-diisocyanato-2,2,4-trimethylhexane and 9g of chain extender 1,4-butanediol, at 60°C, from 0.5ml of dilaurel Dibutyltin acid catal...

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Abstract

The invention provides an adhesive composition. The adhesive composition comprises organic silicone-modified acrylic polyol, polyether polyol, isocyanate, an antioxidant and a solvent, wherein the percentage mass content of organic silicone-modified acrylic polyol is 15-25%, the percentage mass content of polyether polyol is 3.5-8.5%, the molar ratio of hydroxyl groups in organic silicone-modified acrylic polyol and polyether polyol to the isocyanate groups in isocyanate is (0.8-1.3):1, the percentage mass content of the antioxidant is 0.2-2% and the percentage mass content of the solvent is 60-78%. The low-temperature-resistant backsheet prepared from the adhesive composition can be applied in an environment of -70 DEG C for a long term and can be used for effectively protecting cell elements in solar cell modules.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a low-temperature-resistant adhesive composition and a solar cell back film. Background technique [0002] The solar cell back film is a composite film obtained by bonding multi-layer films with an adhesive, and can withstand a low temperature environment of -40°C. With the continuous deterioration of the earth's environment, extreme weather is coming frequently. The United States, Europe, Russia, Canada and other countries often experience -50°C, and some areas can reach -70°C. When the temperature is lower than -40°C, the adhesive used in the back film will become brittle and lose its toughness and bonding performance, which cannot meet the low temperature resistance, especially the environment of -70°C. [0003] The commonly used adhesive for the back film of solar cells is a two-component polyurethane adhesive. The main agent mainly includes two types: polyester polyol o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J11/06C08G18/66C08G18/48C08G18/62H01L31/049
CPCY02E10/50
Inventor 顾丽争许亮张艳田勇
Owner 乐凯胶片股份有限公司
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