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Adhesive for solar photovoltaic module back plate and preparation method of adhesive

A solar photovoltaic and adhesive technology, which is applied in the direction of adhesives, adhesive additives, adhesive types, etc., can solve the problem that the performance quality and service life of solar photovoltaic modules are greatly affected, the dilution solvent performance is greatly affected, and the adhesive performance Decrease and other issues, to reduce the risk of hydrolysis aging, improve reliability and service life, improve the effect of adhesion

Inactive Publication Date: 2019-09-20
北京知淘科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ethyl acetate, ketones, etc. are usually used as dilution solvents. The purity of the dilution solvent has a great influence on the performance of the adhesive. Acid radicals react, leading to a decrease in adhesive performance, and even failure in severe cases
At the same time, in the backplane composite process, if the parameters are not properly controlled, the solvent inside the adhesive layer is not easy to volatilize, resulting in solvent residue, the adhesive layer is prone to bubbles, slippage, etc., and the thermal stress of the adhesive layer increases after thermal expansion, which will lead to The adhesion between them is low, which has a great influence on the performance quality and service life of solar photovoltaic modules

Method used

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  • Adhesive for solar photovoltaic module back plate and preparation method of adhesive
  • Adhesive for solar photovoltaic module back plate and preparation method of adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The adhesive for the solar photovoltaic module back sheet of this embodiment is prepared by the following method:

[0037] 1) According to the molar ratio of polypropylene glycol in terms of -OH and diphenylmethane diisocyanate in terms of -NCO being 1:3.5, dehydrated polypropylene glycol is slowly added to liquefied diphenylmethane diisocyanate; under nitrogen protection, The temperature of the system was raised to 80°C for 2 hours of heat preservation reaction, and then cooled to room temperature to obtain the first isocyanate-terminated prepolymer; the mass content of -NCO in the obtained first isocyanate-terminated prepolymer was 8.84%;

[0038] According to the molar ratio of polytetramethylene ether glycol in terms of -OH and polymethylene polyphenyl polyisocyanate in terms of -NCO is 1:4.5 ratio, dehydration polytetramethylene ether glycol is slowly added to polytetramethylene ether glycol In methylene polyphenyl polyisocyanate; under the protection of nitrogen, ...

Embodiment 2

[0045] The adhesive for the solar photovoltaic module back sheet of this embodiment is prepared by the following method:

[0046] 1) According to the molar ratio of polypropylene glycol in terms of -OH and diphenylmethane diisocyanate in terms of -NCO being 1:3.8, slowly add dehydrated polypropylene glycol dropwise to liquefied diphenylmethane diisocyanate, under nitrogen protection , raising the temperature of the system to 85°C for 2 hours of heat preservation reaction, and then cooling to room temperature to obtain the first isocyanate-terminated prepolymer; the mass content of -NCO in the obtained first isocyanate-terminated prepolymer is 9.60%;

[0047] According to the molar ratio of polytetramethylene ether glycol in terms of -OH and polymethylene polyphenyl polyisocyanate in terms of -NCO is 1:4.7 ratio, dehydration polytetramethylene ether glycol is slowly added to polytetramethylene ether glycol In methylene polyphenyl polyisocyanate; under the protection of nitrogen...

Embodiment 3

[0054] The adhesive for the solar photovoltaic module back sheet of this embodiment is prepared by the following method:

[0055] 1) According to the molar ratio of polypropylene glycol in terms of -OH and diphenylmethane diisocyanate in terms of -NCO being 1:4.0, slowly add dehydrated polypropylene glycol dropwise into liquefied diphenylmethane diisocyanate, under nitrogen protection , heating the system to 85°C for 2.5 hours, then cooling to room temperature to obtain the first isocyanate-terminated prepolymer; the mass content of -NCO in the obtained first isocyanate-terminated prepolymer is 10.1%;

[0056] According to the molar ratio of polytetramethylene ether glycol in terms of -OH and polymethylene polyphenyl polyisocyanate in terms of -NCO, the ratio of 1:5.0 is slowly added to the polytetramethylene ether glycol. In methylene polyphenyl polyisocyanate; under the protection of nitrogen, keep warm at 75°C for 2h, and then cool to room temperature to obtain the second i...

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Abstract

The invention relates to an adhesive for a solar photovoltaic module back plate and a preparation method of the adhesive. The adhesive is composed of a component A and a component B; the component A comprises a first isocyanate-terminated prepolymer and a second isocyanate-terminated prepolymer according to a mass ratio of (2.0-2.2):1; and the component B is mainly prepared by mixing the following raw materials in parts by weight: modified polyester polyol, polycarbodiimide resin, a silane coupling agent and a stabilizing assistant, wherein the molar ratio of -NCO in the component A to -OH in the component B is (2.6-2.8):1. The adhesive is a solvent-free double-component polyurethane adhesive and has excellent bonding performance. When the adhesive is used in the back plate interlayer combination process, the laminating defect caused by solvent volatilization can be avoided, and the rate of finished products is improved. A photovoltaic back plate prepared by using the adhesive has relatively high interlayer stripping strength, good ageing resistance and good yellowing resistance, and reliability and the service life of a solar photovoltaic module can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic module backplane materials, and in particular relates to an adhesive for a solar photovoltaic module backplane, and also relates to a preparation method of the aforementioned adhesive for a solar photovoltaic module backplane. Background technique [0002] Solar energy refers to the radiant energy of sunlight. As a clean energy with abundant reserves, its utilization process is the most direct application of solar energy, and has very little impact on the environment and climate. It is the hottest research in the field of new energy in recent years. direction. Solar photovoltaic modules (also known as solar panels) are photoelectric conversion systems that use the photovoltaic effect to directly convert energy in sunlight into electrical energy. The main components include aluminum alloy frames, photovoltaic cover glass, EVA for packaging, cells, and back board etc. [0003] The backs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/06C08G18/48C08G18/42C08G18/10
CPCC08G18/10C08G18/4018C08G18/425C08G18/48C08G18/4854C08L2203/206C09J11/06C09J175/08C08K5/544
Inventor 魏晓峰
Owner 北京知淘科技有限责任公司
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