Adhesive for solar battery back sheets

A technology for solar cells and adhesives, applied in the direction of adhesive types, polyurea/polyurethane adhesives, adhesives, etc., to achieve the effects of improving initial tack, excellent durability, and excellent productivity

Active Publication Date: 2014-08-27
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Therefore, it is important that the adhesive for solar battery back sheets has not only sufficient hydrolysis resistance but also higher adhesion to film substrates and sufficient adhesion even at high temperature, while Patent Documents 1 to 3 Adhesives may not meet the above properties

Method used

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  • Adhesive for solar battery back sheets
  • Adhesive for solar battery back sheets
  • Adhesive for solar battery back sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0177]

[0178] As shown in Table 3, 83.1 g of Polymer 1 [208 g of an ethyl acetate solution of Polymer 1 (solid content: 40.0% by weight)] and 16.9 g of SUMIDULE N3300 manufactured by Sumika Bayer Urethane Co., Ltd. ( trade name), and then mixed to prepare a binder solution. Using the solution thus prepared as an adhesive for solar cell back sheets, the following tests were performed.

[0179]

[0180] First, the adhesive for solar battery back sheets of Example 1 was applied to a transparent polyethylene terephthalate (PET) sheet (manufactured by Mitsubishi Polyester Film Corporation, trade name O300EW36), so that the The weight of solid components is 10g / m 2 , and then dried at 80° C. for 10 minutes to obtain an adhesive-coated PET sheet 1 .

[0181] Then, a surface-treated transparent polyolefin film (linear low-density polyethylene film manufactured by Futamura Chemical Co., Ltd., trade name LL-XUMN #30) was placed on the adhesive side of the adhesive-coated PET she...

Embodiment 2 to 12 and comparative example 1 to 3

[0211] In the same manner as in Example 1, adhesives for solar cell back sheets were prepared according to the compositions shown in Tables 3 and 4, and then evaluated. The evaluation results are shown in Tables 3 and 4.

[0212] table 3

[0213]

[0214] Table 4

[0215]

[0216] As shown in Tables 1 to 4, since the adhesives for solar battery back sheets of Examples 1 to 12 contain polyurethane resins obtainable by reacting acrylic polyols with isocyanate compounds, and can be obtained by making hydroxyalkyl (meth)acrylates Acrylic esters are polymerized with monomers including acrylonitrile and (meth)acrylic esters as polymerizable monomers for the synthesis of acrylic polyols, and thus the resulting adhesive has excellent initial resistance to film upon coating. Tack, initial tack after cure, and high temperature adhesion, also has excellent hydrolysis resistance, and has a satisfactory overall balance. Therefore, the adhesives of Examples are suitable as adhesive...

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Abstract

An object of the present invention is to provide a urethane adhesive for solar battery back sheets, which has satisfactory initial adhesion to a film in the production of a solar battery back sheet, satisfactory initial adhesive property after curing and high adhesive property at high temperature, and also has a sufficient hydrolysis resistance over the long term and is excellent in overall balance; a solar battery back sheet which is obtainable by using the adhesive; and a solar battery module. Disclosed is an adhesive for solar battery back sheets, including a urethane resin obtainable by the reaction of an acrylic polyol with an isocyanate compound, wherein the acrylic polyol is obtainable by polymerizing polymerizable monomers, the polymerizable monomers include a monomer having a hydroxyl group and other monomers, the monomer having a hydroxyl group includes a hydroxyalkyl (meth)acrylate, and the other monomers include acrylonitrile and (meth)acrylic ester(s).

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Japanese Patent Application No. 2011-257268 filed on November 25, 2011 under the Paris Convention, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to an adhesive for solar cell back sheets. More particularly, the present invention relates to a solar cell back sheet obtainable by using the adhesive, and a solar cell module obtainable by using the solar cell back sheet. Background technique [0004] Progress has been made in the practical application of solar cells as a useful energy source. Solar cells include various types, and silicon-based solar cells, inorganic compound-based solar cells, organic solar cells, and the like are known typical solar cells. [0005] In these solar cells, a surface protection sheet is generally provided on a surface irradiated with sunlight to protect the surface. A back protection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/62C09J175/04H01L31/049
CPCC08G18/6262C08G18/6229H01L31/0487C09J175/14H01L31/0481C08G18/6254C09J175/04C08G18/6237H01L31/049Y02E10/50
Inventor 伊藤祥子
Owner HENKEL KGAA
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