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Sealing agent for metal-glass solar vacuum heat collection tube and preparation method thereof

A technology of glass solar energy and vacuum heat collecting tubes, which is applied in the field of sealing agent, can solve the problems that it is difficult to meet the sealing requirements of medium and high temperature solar vacuum heat collecting tubes, and achieve excellent sealing effect and good thermal stability.

Inactive Publication Date: 2019-02-05
JIANGSU JINGZHAN ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used sealing methods include solder connection, adhesive connection, thermocompression sealing and flame fusion sealing connection, etc., but there are still various problems, and it is difficult to meet the sealing requirements of medium and high temperature solar vacuum collector tubes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A sealing agent for metal-glass solar vacuum heat collection tubes, the raw materials include, in parts by weight: 20 parts of bromobutyl rubber, 20 parts of silicon rubber, 3 parts of polycarbonate, 1 part of calcium carbonate whisker, 0.5 parts of plasticizer, 0.5 parts of filler, 2 parts of glass ceramics, 1 part of aluminum borate whiskers, 0.5 parts of zinc oxide, 0.02 parts of surface modifier, 0.3 parts of anti-aging agent, 0.1 parts of lubricant, 10 parts of ethyl acetate .

[0018] The plasticizer is a mixture of tributyl phosphate and hydrogenated vegetable oil, and the weight ratio of the two is 2:1.

[0019] The filler is white carbon black, and the particle size of the white carbon black is 80-100 mesh.

[0020] The surface modifier is a mixture of silane coupling agent and sodium lauryl sulfate, and the weight ratio of the two is 1:1.

[0021] Described lubricant is magnesium stearate.

[0022] The preparation method of the above-mentioned sealing agent...

Embodiment 2

[0028] A sealing agent for metal-glass solar vacuum heat collection tubes, the raw materials include in parts by weight: 24 parts of bromobutyl rubber, 27 parts of silicone rubber, 4 parts of polycarbonate, 2 parts of calcium carbonate whiskers, 0.7 parts of plasticizer, 0.6 parts of filler, 4 parts of glass ceramics, 2 parts of aluminum borate whiskers, 0.8 parts of zinc oxide, 0.03 parts of surface modifier, 0.4 parts of anti-aging agent, 0.1 parts of lubricant, 13 parts of ethyl acetate .

[0029] The plasticizer is a mixture of tributyl phosphate and hydrogenated vegetable oil, and the weight ratio of the two is 2:3.

[0030] The filler is white carbon black, and the particle size of the white carbon black is 80-100 mesh.

[0031] The surface modifier is a mixture of silane coupling agent and sodium lauryl sulfate, and the weight ratio of the two is 1:2.

[0032] Described lubricant is magnesium stearate.

[0033] The preparation method of the above-mentioned sealing ag...

Embodiment 3

[0039] A sealing agent for metal-glass solar vacuum heat collection tubes, the raw materials include in parts by weight: 30 parts of bromobutyl rubber, 30 parts of silicone rubber, 6 parts of polycarbonate, 3 parts of calcium carbonate whiskers, 1 part of plasticizer, 1 part of filler, 5 parts of glass ceramics, 3 parts of aluminum borate whiskers, 1 part of zinc oxide, 0.05 parts of surface modifier, 0.6 parts of anti-aging agent, 0.2 parts of lubricant, 15 parts of ethyl acetate .

[0040] The plasticizer is a mixture of tributyl phosphate and hydrogenated vegetable oil, and the weight ratio of the two is 1:2.

[0041] The filler is white carbon black, and the particle size of the white carbon black is 80-100 mesh.

[0042] The surface modifier is a mixture of silane coupling agent and sodium lauryl sulfate, and the weight ratio of the two is 3:1.

[0043] Described lubricant is magnesium stearate.

[0044] The preparation method of the above-mentioned sealing agent for m...

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Abstract

The invention discloses a sealing agent for a metal-glass solar vacuum heat collection tube and a preparation method thereof. The sealing agent is prepared from the following raw materials: brominatedbutyl rubber, silicon rubber, polycarbonate, calcium carbonate whisker, a plasticizer, a filling agent, micro-crystalline glass, aluminum borate whisker, zinc oxide, a surface modifying agent, an anti-ageing agent, a lubricant and ethyl acetate. The preparation method of the sealing agent comprises the following steps: firstly, mixing the brominated butyl rubber, the silicon rubber, the polycarbonate, the calcium carbonate whisker and the plasticizer; then mixing and grinding the micro-crystalline glass, the aluminum borate whisker, the zinc oxide and the surface modifying agent to obtain modified powder; finally, mixing a mixed mixture, the modified powder, the filling agent, the anti-ageing agent and the lubricant; dropwise adding the ethyl acetate and uniformly stirring to obtain the sealing agent. The sealing agent has a good sealing effect and high thermal stability and can be widely used for medium-temperature and high-temperature vacuum heat collection tubes.

Description

technical field [0001] The invention belongs to the technical field of sealing agents, and in particular relates to a sealing agent for metal-glass solar vacuum heat collecting tubes and a preparation method thereof. Background technique [0002] The solar vacuum heat collecting tube is a high-efficiency solar heat collecting element, and it is a key component that receives sunlight and converts it into heat energy. Its advantage is that the convective heat loss between the two tubes is almost zero due to the vacuum interlayer. From the point of view of the material of the heat collecting tube, it can be divided into two categories, one is the all-glass vacuum solar heat collecting tube, and the other is the metal-glass solar vacuum heat collecting tube. Among them, the all-glass vacuum solar collector tube has defects such as poor pressure resistance to freezing and weak impact resistance, and is easy to freeze and crack in cold regions, while the efficiency of metal-glass ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/28C08L83/04C08L69/00C08L91/00C08K13/04C08K7/08C08K7/14C08K3/22C08K5/521
CPCC08K2003/2296C08K2201/014C08L23/283C08L83/04C08L2201/08C08L2203/18C08L2205/035C08L69/00C08L91/00C08K13/04C08K7/08C08K7/14C08K3/22C08K5/521
Inventor 芮唐明黄华叶
Owner JIANGSU JINGZHAN ENERGY TECH CO LTD