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Coating material, coating film, solar-cell-module backsheet, and solar-cell module

A coating and film coating technology, which is applied to electrical components, polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor adhesion

Active Publication Date: 2014-07-30
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PVdF-based coating has poor adhesion to EVA alone as a sealing material because PVdF does not have functional groups.

Method used

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  • Coating material, coating film, solar-cell-module backsheet, and solar-cell module
  • Coating material, coating film, solar-cell-module backsheet, and solar-cell module
  • Coating material, coating film, solar-cell-module backsheet, and solar-cell module

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0154] Under stirring, 223.2 parts by mass of curable TFE-based copolymer (Zeffle GK570 manufactured by Daikin Industries, Ltd., 65% by mass of solid content, 60 mgKOH / g of hydroxyl value, solvent: butyl acetate), titanium dioxide (DuPont) as a white pigment, 250 parts by mass of Ti-Pure R960 manufactured by the company and 126.8 parts by mass of butyl acetate were premixed, and then 780 parts by mass of glass beads with a diameter of 1.2 mm were charged and dispersed at 1500 rpm for 1 hour using a pigment disperser. Thereafter, glass beads were sieved with #80 mesh, and 269.2 parts by mass of a curable TFE-based copolymer (Zeffle GK570) was added to the solution to prepare a white paint.

[0155] In 100 parts by mass of the white paint, 20.8 parts by mass of a curing agent (Duranate K6000, manufactured by Asahi Kasei Chemical Co., Ltd., active methylene compound-blocked isocyanate of HDI) (with respect to the curable functional group in the curable TFE-based copolymer) was mix...

Embodiment 1

[0157] About the paint 1 obtained in the preparation example 1, the pot life was measured by the method shown below. The results are shown in Table 1.

[0158] (Applicable period)

[0159] Performed according to JIS K5600-2-6. Put the curable paint prepared in each preparation example into a polypropylene container with a volume of 100 ml, seal it, store it at 25° C., measure the viscosity in due course, and set the time until the viscosity reaches twice the initial value as the pot life.

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Abstract

The purpose of the present invention is to provide the following: a coating material with dramatically improved pot life; a coating film obtained from said coating material; a solar-cell-module backsheet that includes said coating film; and a solar-cell module. The present invention is a coating material characterized by containing the following: a fluorine-containing polymer that contains a curable functional group; and a block isocyanate based on hexamethylene diisocyanate.

Description

technical field [0001] The present invention relates to a paint, a coating film, a back plate of a solar battery module and a solar battery module. More specifically, the present invention relates to a paint suitable for coating a back sheet of a solar cell module, a coating film obtained from the paint, and a back sheet of a solar cell module and a solar cell module having the coating film. Background technique [0002] A solar cell module generally consists of a surface layer, a sealing material layer that seals the solar cells, and a back sheet. As a sealing material forming the sealing material layer, a copolymer of ethylene and vinyl acetate (hereinafter also referred to as EVA.) is generally used. [0003] For the backsheet, various properties such as mechanical strength, weather resistance, water and moisture resistance, and electrical insulation are required. Usually, the back sheet is composed of a multi-layer structure, for example, from the side in contact with ...

Claims

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Application Information

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IPC IPC(8): C09D175/04H01L31/049
CPCC09D175/04C08G18/73C08G18/791H01L31/049Y02E10/50C09D127/18C08K5/29
Inventor 中川秀人午坊健司尾崎秀典浅野和哉匂坂重仁
Owner DAIKIN IND LTD
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