Silicone sealant for photovoltaic double glass module and preparation method thereof

A sealant and silicone technology, applied in the field of sealants, can solve the problems of inability to meet the use requirements of photovoltaic double-glass modules, short life of EVA film and backplane, snail pattern of photovoltaic power plants, etc., and achieve good elasticity and adhesion performance. The effect of excellent, best weathering performance

Active Publication Date: 2020-11-10
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since 2013, due to the short life and poor weather resistance of the EVA film and back sheet of this photovoltaic module, many quality problems such as snail pattern and PID attenuation have been caused in photovoltaic power stations.
The use of aluminum frame support materials for photovoltaic double-glass modules is eliminated. The installation of the entire module requires the use of adhesives that can withstand large loads in harsh climates for a long time. Requirements for the use of glass components

Method used

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  • Silicone sealant for photovoltaic double glass module and preparation method thereof
  • Silicone sealant for photovoltaic double glass module and preparation method thereof
  • Silicone sealant for photovoltaic double glass module and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042]The preparation method of the silicone sealant used in the photovoltaic double glass module of this embodiment is as follows:

[0043] (1) 100 parts by mass of alkoxy-terminated polydimethylsiloxane (the kinematic viscosity at 25°C is 20 Pa·s), 80 parts by mass of nano Calcium carbonate (average particle size is 30nm, BET specific surface area is 25m 2 / g, the treatment method is: put nano-calcium carbonate into a high-speed mixer with a blower device at the bottom, then atomize and spray the isopropanol solution of phenyl silicone resin on the surface of nano-calcium carbonate, and heat up to 120°C Heating and stirring for 60min, obtaining phenyl silicone resin content is 1.8% active nano calcium carbonate), and 5 mass parts of fumed silica (BET specific surface area is 120m2) through silane coupling agent surface treatment 2 / g, the treatment method is: put the fumed silica into a high-speed mixer with a blower device at the bottom, then atomize and spray the isopropa...

Embodiment 2

[0048] The preparation method of the silicone sealant used in the photovoltaic double glass module of this embodiment is as follows:

[0049] (1) 100 parts by mass of alkoxy-terminated polydimethylsiloxane (kinematic viscosity at 25°C is 60 Pa·s), 50 parts by mass of nano Calcium carbonate (average particle size is 80nm, BET specific surface area is 17m 2 / g, the treatment method is: put nano-calcium carbonate into a high-speed mixer with a blower device at the bottom, then atomize and spray the isopropanol solution of phenyl silicone resin on the surface of nano-calcium carbonate, and heat up to 150°C Heating and stirring for 60min, obtaining phenyl silicone resin content is 0.8% active nano-calcium carbonate), and 10 mass parts of fumed silica (BET specific surface area is 150m2) through silane coupling agent surface treatment 2 / g, the treatment method is: put the fumed silica into a high-speed mixer with a blower device at the bottom, and then atomize and spray the isopro...

Embodiment 3

[0054] The preparation method of the silicone sealant used in the photovoltaic double glass module of this embodiment is as follows:

[0055] (1) 100 parts by mass of alkoxy-terminated polydimethylsiloxane (kinematic viscosity at 25°C is 20 Pa·s), 60 parts by mass of nano Calcium carbonate (average particle size is 50nm, BET specific surface area is 19m 2 / g, the treatment method is: put nano-calcium carbonate into a high-speed mixer with a blower device at the bottom, then atomize and spray the isopropanol solution of phenyl silicone resin on the surface of nano-calcium carbonate, and heat up to 135°C Heated and stirred for 60min to obtain phenyl silicone resin content is 1% active nano calcium carbonate), and 8 mass parts of fumed silica (BET specific surface area is 200m2) through silane coupling agent surface treatment 2 / g, the treatment method is: put the fumed silica into a high-speed mixer with a blower device at the bottom, and then atomize and spray the isopropanol ...

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Abstract

The invention relates to a silicone sealant for a photovoltaic double-glazed module and a preparation method thereof. The silicone sealant is prepared from the following raw material components in parts by weight: 100 parts of alkoxy-terminated polydimethylsiloxane, 50 to 80 parts of active nano-calcium carbonate, 5 to 10 parts of modified fumed silica, 2 to 20 parts of silicone oil plasticizer, 10 to 15 parts of cross-linking agents, 1 to 5 parts of catalysts, 2 to 4 parts of adhesion promoter. The silicone sealant has high strength, good elasticity, excellent adhesion to a substrate, and excellent weather resistance, and performance retention rate exceeds 80% in a long-term salt spray, ultraviolet ray, high temperature and high humidity environment. The silicone sealant is suitable for structural bonding and sealing of the photovoltaic double-glazed module.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a silicone sealant for photovoltaic double-glass modules and a preparation method thereof. Background technique [0002] As a sustainable energy alternative, solar photovoltaic power generation has developed rapidly in recent years. Traditional photovoltaic modules are the core components of photovoltaic power generation. They are composed of high conversion efficiency monolithic solar cells, ethylene-vinyl acetate copolymer (EVA) film, low-iron tempered glass, fluoroplastics, and polyester composite back film (TPT). The components are heated and laminated under vacuum to become a whole, and finally the anti-corrosion aluminum alloy frame and junction box are installed to become the finished photovoltaic cell module. Since 2013, due to the short life and poor weather resistance of the EVA film and back sheet of this photovoltaic module, many quality problems such as snail patte...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06C09J11/08
CPCC08K2003/265C08K2201/011C08L2201/08C08L2203/206C08L2205/02C09J11/04C09J11/06C09J11/08C09J183/06C08L83/04C08K13/06C08K9/08C08K3/26C08K9/06C08K3/36
Inventor庞文键李福中陈何国陈思斌
OwnerGUANGZHOU BAIYUN CHEM IND