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High-strength flame-retardant heat-conducting condensed type power supply sealant and preparation method therefor

A sealant and condensation-type technology, applied in chemical instruments and methods, non-polymer adhesive additives, adhesives, etc., can solve problems affecting product waterproof performance, low shrinkage heat conduction, silicone rubber does not cure, etc., to achieve waterproof Excellent sealing effect, high flame retardancy and thermal conductivity, and excellent aging resistance

Inactive Publication Date: 2015-12-02
深圳市隆邦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the existing addition-type encapsulant usually has low shrinkage, good thermal conductivity, insulation performance and flame retardancy, but its platinum catalyst and organic compounds containing N, S, P and other elements, or Sn, Pb, Hg , Bi, As and other heavy metal ionic compounds, and unsaturated organic compounds containing alkyne groups, it is easy to fail, so that the silicone rubber does not cure
In addition, the addition type potting adhesive has poor adhesion to metal, plastic and electronic components, thus affecting the waterproof performance of the product
The existing condensation-type potting compound has the disadvantages of slightly larger shrinkage rate, low thermal conductivity, and general flame-retardant effect

Method used

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Examples

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preparation example Construction

[0036] The following is an introduction to the preparation method of the above-mentioned high-strength flame-retardant and heat-conducting condensation type power supply sealant, the preparation method comprising:

[0037] S1. Put hydroxyl-terminated organosiloxane, silica, alumina, aluminum hydroxide, aluminum silicate, and carbon black into a high-speed disperser, keep warm and continue to disperse. After cooling to room temperature, add methyl-terminated organosiloxane alkane to obtain component A.

[0038] Specifically, the step S1 includes: putting 45% of hydroxyl-terminated organosiloxane, 10% of silicon dioxide, 10% of aluminum oxide, 25% of aluminum hydroxide, 5% of aluminum silicate, and 0.01% of carbon black into high-speed dispersion In the machine, the rotation speed is 1200rpm, the material temperature is kept at 80-100°C, and the dispersion is continued for 2 hours. After cooling to room temperature, 5% of terminal methyl organosiloxane is added to obtain compone...

Embodiment 1

[0044] In terms of parts by mass, 45 parts of hydroxyl-terminated polydimethylsiloxane, 10 parts of silicon dioxide, 10 parts of alumina, 25 parts of aluminum hydroxide, 5 parts of aluminum silicate, and 0.01 parts of carbon black were put into high-speed dispersion in sequence. In the machine, the rotation speed is 1200rpm, the material temperature is kept at 80-100°C, and the dispersion is continued for 2 hours. Then cool to room temperature, and add 5 parts of terminal methyl organosiloxane to obtain component A.

[0045] Put 24.8 parts of ethyl orthosilicate 28, 5 parts of ethyl orthosilicate 40, 3 parts of KH151, 3 parts of KH570, 4 parts of KH792, 60 parts of polydimethylsiloxane, 0.02 parts of dibutyltin dilaurate into the seal Mix well in the container, age for 24 hours, and filter out the precipitate to obtain component B.

[0046] Mix 100g of component A and 10g of component B in a plastic cup and stir evenly with a glass rod. Vacuum defoaming for another 5 minutes...

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Abstract

The invention relates to a high-strength flame-retardant heat-conducting condensed type power supply sealant and a preparation method therefor. The power supply sealant comprises a component A and a component B, wherein the component A comprises hydroxyl terminated organosiloxane, methyl terminated organosiloxane, silicon dioxide, aluminum oxide, aluminum hydroxide, aluminum silicate and carbon black; the component B comprises methyl terminated organosiloxane, organic tin and organosiloxane comprising sulfydryl, amino, ethyoxyl, vinyl and methylacryloyl. The high-strength flame-retardant heat-conducting condensed type power supply sealant provided by the invention fully combines the advantages of an addition type pouring sealant and a condensed type sealant and makes up the defects of the condensed type sealant, and a novel condensed type double-component power supply pouring sealant which is high in strength, high in adhesion, high in flame retardance and good in heat conductivity. Meanwhile, the sealant has an extremely strong adhesive force to metals, plastic, PCB boards and electronic components and is hard to poison.

Description

technical field [0001] The invention relates to the technical field of electronic potting glue, in particular to a high-strength flame-retardant heat-conducting condensation type power supply sealant and a preparation method thereof. Background technique [0002] Because of its high and low temperature resistance, weather resistance and electrical insulation performance superior to most materials, silicone has become the main potting material for high-power power supplies. [0003] Existing silicone power potting adhesives are generally divided into: addition type and condensation type. Among them, the existing addition-type encapsulant usually has low shrinkage, good thermal conductivity, insulation performance and flame retardancy, but its platinum catalyst and organic compounds containing N, S, P and other elements, or Sn, Pb, Hg When ionic compounds of heavy metals such as Bi, As, and unsaturated organic compounds containing alkyne groups are in contact, they are prone ...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J183/04C09J183/08C09J11/04C09J11/06C09K3/10
Inventor 陈金明
Owner 深圳市隆邦新材料科技有限公司
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