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Dealcoholization sealant for photovoltaic assembly and preparation method thereof

A photovoltaic module, dealcohol-type technology, applied in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve problems such as material cracks, inability to use junction boxes, and endanger the health of production personnel, so as to improve stability , Improving extrusion performance and improving storage stability

Inactive Publication Date: 2019-04-23
安徽兆拓新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the limitations of deoxime-type silicone sealants in photovoltaic modules are also obvious. For example, the small molecules released during the vulcanization process are butanone oxime, which will corrode the galvanized copper strips in solar modules, and butanone oxime Ketoxime also has a corrosive effect on polycarbonate, which will cause cracks in the material, so it cannot be used in PC junction boxes
In addition, the production workshop of the photovoltaic cell module factory is sealed and dust-proof, and methyl ethyl ketone oxime will accumulate in the production environment, endangering the health of production personnel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example provides a dealcoholized sealant for photovoltaic modules, which is composed of the following raw materials in parts by weight: 90 parts of polyalkoxysilyl-terminated polydimethylsiloxane, ultrafine 20 parts of reinforcing calcium carbonate powder, 4 parts of aluminum hydroxide, 3 parts of titanium white paste, 1.5 parts of vinyltrimethoxysilane, 2 parts of methyltrimethoxysilane, 0.4 parts of organotin chelate catalyst and complex partner Joint agent 0.8 part.

[0027] The polyalkoxysilyl-terminated polydimethylsiloxane described in this example is prepared by reacting α, ω-dihydroxypolydimethylsiloxane with alkoxysilane in the presence of ammonium carbamate. The viscosity at 25°C is 5800mPa·s.

[0028] The titanium white paste described in this example is prepared by uniformly mixing anatase titanium dioxide and simethicone oil with a viscosity of 500 mPa·s at a volume ratio of 3:2.

[0029] The compound coupling agent described in this example is a com...

Embodiment 2

[0035]This example provides a dealcoholized sealant for photovoltaic modules, which is composed of the following raw materials in parts by weight: 90 parts of polyalkoxysilyl-terminated polydimethylsiloxane, ultrafine filler with a particle size of 1.8 μm 25 parts of strong quartz powder, 5 parts of magnesium hydroxide, 4 parts of titanium white paste, 2 parts of anhydrous calcium chloride, 3 parts of methyltrimethoxysilane, 0.5 parts of organotin chelate catalyst and compound coupling agent 1 share.

[0036] The polyalkoxysilyl-terminated polydimethylsiloxane described in this example is prepared by reacting α, ω-dihydroxypolydimethylsiloxane with alkoxysilane in the presence of ammonium carbamate. The viscosity at 25°C is 6000mPa·s.

[0037] The titanium white paste described in this example is prepared by uniformly mixing anatase titanium dioxide and simethicone oil with a viscosity of 500 mPa·s at a volume ratio of 3:2.

[0038] The compound coupling agent described in t...

Embodiment 3

[0044] This embodiment provides a dealcoholized sealant for photovoltaic modules, which is composed of the following raw materials in parts by weight: 90 parts of polyalkoxysilyl-terminated polydimethylsiloxane, ultrafine filler with a particle size of 2 μm 30 parts of strong diatomite powder, 6 parts of aluminum hydroxide, 5 parts of titanium white paste, 2.5 parts of calcium oxide, 4 parts of methyltrimethoxysilane, 0.6 parts of organic tin chelate catalyst and 1.2 parts of compound coupling agent .

[0045] The polyalkoxysilyl-terminated polydimethylsiloxane described in this example is prepared by reacting α, ω-dihydroxypolydimethylsiloxane with alkoxysilane in the presence of ammonium carbamate. The viscosity at 25°C is 6200mPa·s.

[0046] The titanium white paste described in this example is prepared by uniformly mixing anatase titanium dioxide and simethicone oil with a viscosity of 500 mPa·s at a volume ratio of 3:2.

[0047] The compound coupling agent described in ...

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Abstract

The invention belongs to the technical field of sealing materials, and particularly relates to dealcoholization sealant for a photovoltaic assembly and a preparation method thereof. The dealcoholization sealant for the photovoltaic assembly is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyalkoxy silicon base-terminated polydimethylsiloxane, 20 to 30 parts offiller, 4 to 6 parts of flame-retardant agent, 3 to 5 parts of titanium dioxide color paste, 1.5 to 2.5 parts of water removal agent, 2 to 4 parts of cross0linking agent, 0.4 to 0.6 part of organic tin chelate catalyst and 0.8 to 1.2 parts of compound coupling agent. The preaparation method of the dealcoholization sealant for the photovoltaic assembly comprises the following steps: (1) measuring all raw materials according to the weight ratio; (2) adding the polyalkoxy silicon base-terminated polydimethylsiloxane, the filler, the flame-retardant agent and the titanium dioxide color paste intoa vacuum kneading machine, dehydrating, blending, kneading for 4 to 6 hours, and cooling to the room temperature; and (3) adding a dewatering agent, a cross-linking agent, organic tin chelate catalystand a compound coupling agent, and sufficiently mixing, so as to obtain the dealcoholization sealant for the photovoltaic assembly. The dealcoholization sealant for the photovoltaic assembly has thecharacteristics of short curing time, high adhesion strength and good aging resistance.

Description

technical field [0001] The invention belongs to the technical field of sealing materials, and in particular relates to a dealcoholized sealant for photovoltaic modules and a preparation method thereof. Background technique [0002] Solar photovoltaic power generation system refers to a new type of power generation system that uses the photovoltaic effect of solar cells to directly convert solar radiation energy into electrical energy. Solar panels, also known as "photovoltaic modules", or PV modules for short, are one of the core parts of solar photovoltaic power generation systems. The top-down sequence of photovoltaic module structure is ultra-clear glass-sealant-silicon wafer-sealant-TPT (fluorine-containing plastic film) or aluminum alloy backing material. In order to prevent water and oxygen in the air from entering the solar photovoltaic cell module, causing the silicon wafer in the module to oxidize, resulting in a decrease in the conversion rate of the silicon wafer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06C09J11/08
CPCC08K2003/162C08K2201/003C08L2201/08C08L2205/02C09J11/04C09J11/06C09J11/08C09J183/06C08L83/04C08K13/02C08K5/5425C08K5/5419C08K5/544C08K5/548C08K5/57C08K3/16
Inventor 陆志鹏
Owner 安徽兆拓新能源科技有限公司
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