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High-transparency and high-strength room temperature vulcanization organosilicon electron pouring sealant and preparation method and application thereof

A room temperature vulcanization, high-strength technology, applied in the field of potting rubber, can solve the problems of not being able to meet the requirements of potting and sealing of optical and electronic products, silicone rubber reduces the transparency of rubber, and the light transmittance of vulcanized rubber decreases, so as to eliminate poor interface energy, Increased elongation at break and simple preparation method

Active Publication Date: 2010-07-28
深圳市钧泰丰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of white carbon black increases the transparency of the silicone rubber while reducing the transparency of the rubber.
It is found in the experiment that as long as 5 parts of white carbon black are added, the light transmittance of the vulcanized rubber will be reduced to below 80%, which cannot meet the requirements of potting and sealing of optical and electronic products at all.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The present invention provides a preparation method of the high-transparency, high-strength room-temperature vulcanized silicone electronic potting compound, the process steps of which include:

[0036] a. Mix hydroxy-terminated polydimethylsiloxane, simethicone oil and synthetic reinforcing agent in a weight ratio of 100:20~60:10~40 to prepare component A, and then pack it;

[0037]b. Mix ethyl orthosilicate, dimethyldiethoxysilane, γ-aminopropyltriethoxysilane and dibutyltin dilaurate at 2~10:2~10:0.4~1.2:0.4 The weight ratio of ~1.2 is mixed evenly to prepare component B, and then packaged;

[0038] The above steps are all carried out at normal temperature and pressure.

[0039] The preparation method of the synthetic reinforcing agent provided by the invention is as follows:

[0040] a. Mix ethyl orthosilicate, polymethyltriethoxysilane, trimethylsilanol, ethanol, and acetic acid aqueous solution in a weight ratio of 100:20~100:150~300:60~80:5~15 Uniform and reac...

Embodiment 1

[0051] Mix ethyl orthosilicate, polymethyltriethoxysilane, trimethylsilanol, ethanol, and 5% aqueous acetic acid in a weight ratio of 100:100:300:80:15, and react at 60°C for 3 Hour. Then distill ethanol and other low-molecular solvents under reduced pressure at a temperature of 60°C and a pressure of -0.1 MPa to obtain an oily viscous and transparent synthetic reinforcing agent.

[0052] Prepare two-component room temperature vulcanized electronic potting adhesive: component A is mixed with hydroxyl-terminated polydimethylsiloxane, dimethyl silicone oil and synthetic reinforcing agent in a weight ratio of 100:50:40, and Packaging; component B consists of ethyl orthosilicate, dimethyldiethoxysilane, γ-aminopropyltriethoxysilane (KH-550), dibutyltin dilaurate at a ratio of 5:5:1.2 : Mixed at a weight ratio of 1.2 and packaged. The weight ratio of component A and component B is 1:9.

[0053] Mix component A and component B and stir well, pour into the mold, let it level off n...

Embodiment 2

[0055] Mix ethyl orthosilicate, polymethyltriethoxysilane, trimethylsilanol, ethanol, and 5% aqueous acetic acid in a weight ratio of 100:100:300:80:15, and react at 40°C for 4 Hour. Then distill ethanol and other low-molecular solvents under reduced pressure at a temperature of 30°C and a pressure of -0.5 MPa to obtain an oily viscous and transparent synthetic reinforcing agent.

[0056] Prepare two-component room temperature vulcanizing electronic potting adhesive: component A is mixed with hydroxyl-terminated polydimethylsiloxane, dimethyl silicone oil and synthetic reinforcing agent in a weight ratio of 100:50:10, and Packaging; component B consists of ethyl orthosilicate, dimethyldiethoxysilane, γ-aminopropyltriethoxysilane (KH-550), dibutyltin dilaurate at a ratio of 5:5:1.2 : Mixed at a weight ratio of 1.2 and packaged. The weight ratio of component A and component B is 9:1.

[0057] Mix component A and component B and stir well, pour into the mold, let it level off ...

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Abstract

The invention discloses a high-transparency and high-strength room temperature vulcanization organosilicon electron pouring sealant, which comprises two components of A and B, wherein the component A comprises: hydroxyl terminated polydimethylsiloxane, simethicone and synthetized strengthening agent, and the weight ratio thereof is 100:20-60:10-40; the component B comprises vulcanizer and catalyst, the weight ratio thereof is 4-20:0.8-2.4; and the weight ratio of the component A to the component B is 1-9:9-1. The invention ensures that the room temperature vulcanization pouring sealant forms a super large three-dimensional skeleton structure after the vulcanization by adopting the synthetized strengthening agent, effectively improves the mechanical property and optical property of the pouring sealant; at the same time the preparation method of the pouring sealant is simple, is suitable for the industry production, saves energy consumption and reduces the cost.

Description

technical field [0001] The invention relates to a potting glue, in particular to a highly transparent and high-strength room temperature vulcanized silicone electronic potting glue and its preparation method and application. Background technique [0002] Silicone rubber usually has excellent elasticity, high and low temperature resistance, aging resistance, water resistance and electrical insulation, as well as high air permeability and radiation resistance, good mildew resistance and physiological inertia. Room temperature vulcanized silicone potting compound can be vulcanized into an elastomer without pressure at room temperature. It not only has the above-mentioned excellent characteristics, but also has a simple and convenient use process, so it is widely favored (organic silicon polymer and its application [M ], Beijing: Chemical Industry Press, 2004; Journal of Nanchang Hangkong University, 22(4):75-78). Condensation type room temperature vulcanization silicone rubber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08L83/04C08K5/5415C08K5/5419C09K3/10
Inventor 袁志钧
Owner 深圳市钧泰丰新材料有限公司
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