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Silicone sealant, preparation method thereof and photovoltaic module

A silicone sealant, photovoltaic module technology, used in photovoltaic power generation, adhesives, electrical components and other directions, can solve problems such as difficult extrusion and curing, and achieve the effects of improved dispersibility, large market application value, and excellent mechanical properties.

Active Publication Date: 2021-04-23
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a silicone sealant and its preparation method and photovoltaic module, which can effectively improve the reinforcement effect while maintaining the mechanical and aging properties of the silicone sealant, and solve its difficult extrusion and curing technology question

Method used

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  • Silicone sealant, preparation method thereof and photovoltaic module
  • Silicone sealant, preparation method thereof and photovoltaic module

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preparation example Construction

[0050] The present invention also provides the preparation method of described silicone sealant, comprises the following steps:

[0051] S10, mix the α,ω-dihydroxy polydimethylsiloxane, calcium carbonate filler and polycarboxylate water reducer, react at 60°C-80°C for 90min-120min, and heat up to 120°C-130°C °C, react in a vacuum environment for 120min to 180min, cool to normal temperature to obtain the base material; and

[0052] S20, adding the crosslinking agent, the coupling agent and the catalyst to the base material in sequence under a vacuum environment.

[0053] Preferably, step S20 further includes the following steps:

[0054] S21, under a vacuum environment, add a crosslinking agent to the base material for stirring, the rotation speed is 15HZ-20HZ, and the stirring time is 10min-20min;

[0055] S22, adding the coupling agent and the catalyst to the base material after adding the cross-linking agent for stirring, the rotation speed is 15HZ-20HZ, and the stirring t...

Embodiment 1

[0060] (1) 100 parts by weight of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 50000mpa.s at 25°C, 126 parts by weight of nano-active calcium carbonate, and 14 parts by weight of common heavy calcium carbonate, -I 0.7 parts by weight, put into a vacuum kneader, keep the temperature at 70°C, stir at a high speed for 100 minutes, then raise the temperature to 130°C, turn on the vacuum at the same time, the vacuum degree is -0.095MPa, stir at a high speed for 120 minutes, cool to room temperature to obtain the base material .

[0061] (2) Put the above-mentioned base material, 4 parts by weight of tetrabutylketoxime silane, 3 parts by weight of methyl tributylketoxime silane, and 3 parts by weight of vinyl tributylketoxime silane into a planetary mixer, and water-cooled control At room temperature, keep a vacuum of -0.095MPa, rotate at 17HZ, stir for 10 minutes, then continue to add the composition of γ-(2,3 glycidoxy)propyltrimethoxysilane and γ-aminopropyltrimethoxy...

Embodiment 2

[0063] (1) 100 parts by weight of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 50000mpa.s at 25°C, 98 parts by weight of nano-active calcium carbonate, and 42 parts by weight of ordinary heavy calcium carbonate, -I 0.8 parts by weight, put into a vacuum kneader, keep the temperature at 70°C, stir at a high speed for 100 minutes, then raise the temperature to 130°C, turn on the vacuum at the same time, the vacuum degree is -0.095MPa, stir at a high speed for 120 minutes, cool to room temperature to obtain the base material .

[0064] (2) Put the above-mentioned base material, 4 parts by weight of tetrabutylketoxime silane, 3 parts by weight of methyl tributylketoxime silane, and 3 parts by weight of vinyl tributylketoxime silane into a planetary mixer, and water-cooled control At room temperature, keep a vacuum of -0.095MPa, rotate at 17HZ, stir for 10 minutes, then continue to add the composition of γ-(2,3 glycidoxy)propyltrimethoxysilane and γ-aminopropyltrimethoxy...

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Abstract

The present invention relates to a silicone sealant, which comprises alpha, omega-dihydroxy polydimethylsiloxane, a calcium carbonate filler, a polycarboxylic acid water reducing agent, a cross-linking agent, a coupling agent and a catalyst, wherein the molecular structure of the polycarboxylic acid water reducing agent comprises an active group-containing main chain and a plurality of side chains, the active group can be bonded with the calcium carbonate filler, and the mass ratio of the alpha, omega-dihydroxy polydimethylsiloxane to the calcium carbonate filler is 1:(1.4-2). The invention also relates to a preparation method of the silicone sealant. The invention further relates to a photovoltaic module sealed and assembled by the silicone sealant.

Description

technical field [0001] The invention relates to the technical field, in particular to a silicone sealant, a preparation method thereof and a photovoltaic module. Background technique [0002] As a new type of green energy, photovoltaic power generation has attracted more and more attention and promotion all over the world. Photoelectric conversion efficiency is the most important performance index in photovoltaic power generation. In addition to the influence of the quality of silicon cells, the sealing of components is also a crucial factor. Due to its excellent aging resistance, silicone sealants are irreplaceable in the field of photovoltaic module sealing, which is harsh to the environment and requires high requirements. [0003] In order to make silicone sealants have excellent mechanical properties and aging resistance, fumed silica is commonly used as reinforcement at present. For example, patent CN 201110094527.1 discloses a high-performance silicone sealant for ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06C09J11/08H01L31/048
CPCC09J183/04C09J11/04C09J11/06C09J11/08H01L31/0481C08K2003/265C08K2201/014C08K2201/011C08L2203/206C08L2201/08C08L101/08C08K13/02C08K3/26C08K5/5465C08K5/5435C08K5/544Y02E10/50
Inventor 王聪周熠宋立芝付子恩蒋金博黄恒超
Owner GUANGZHOU BAIYUN CHEM IND
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