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Prepn process of thermally conductive and electrically insulating silicone rubber composite material

A composite material and insulating silicon technology, which is applied in the field of preparation of high thermal conductivity insulating silicon rubber composite materials

Active Publication Date: 2007-11-07
LIANYUNGANG LIANLIAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic fillers mainly focus on fibrous and granular fillers, and less research on the influence of flake fillers on the performance of composite systems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) 2 grams of flaky α-Al with an average particle size of 250nm 2 o 3 Mix and grind evenly with polyethylene glycol ethanol solution (containing 0.04 gram PEG6000) to make alumina slurry;

[0014] (2) 1 gram of methyl vinyl silicone rubber, 0.1 gram of benzoyl peroxide, 0.3 gram of hydroxyl silicone oil and treated alumina slurry are mixed and ground evenly;

[0015] (3) Put the rubber into a mold that has been preheated to 125°C after 4 hours, close the mold and pressurize to 6MPa, hold the heat for 10 minutes, wait for the mold to cool to 90°C, and then open the mold and take out the sample, the sample size is 35mm×35mm ×1mm square sheet;

[0016] (4) Put the vulcanized sample on the glass cloth, put it in the air-blast drying oven and raise it from room temperature to 150°C for 1 hour, and then rise to 200°C for 1 hour, keep it at 200°C for 2 hours, and wait for it to dry in the oven. Take out the sample after cooling;

[0017] (5) via UNITHERM TM MODEL2022 th...

Embodiment 2

[0019] (1) 3 grams of flaky α-Al with an average particle size of 250nm 2 o 3 Mix and grind evenly with polyethylene glycol ethanol solution (containing 0.06 gram PEG6000) to make alumina slurry;

[0020] (2) 1 gram of methyl vinyl silicone rubber, 0.1 gram of benzoyl peroxide, 0.45 gram of hydroxyl silicone oil and treated alumina slurry are mixed and ground evenly;

[0021] (3) Put the rubber into a mold that has been preheated to 125°C after 4 hours, close the mold and pressurize to 6MPa, hold the heat for 10 minutes, wait for the mold to cool to 90°C, and then open the mold and take out the sample, the sample size is 35mm×35mm ×1mm square sheet;

[0022] (4) Put the vulcanized sample on the glass cloth, put it in the air-blast drying oven and raise it from room temperature to 150°C for 1 hour, and then rise to 200°C for 1 hour, keep it at 200°C for 2 hours, and wait for it to dry in the oven. Take out the sample after cooling;

[0023] (5) via UNITHERM TM MODEL2022 t...

Embodiment 3

[0025] (1) 2 grams of flaky α-Al with an average particle size of 250nm 2 o 3 Mix and grind evenly with polyethylene glycol ethanol solution (containing 0.04 g PEG6000), and dry to obtain alumina powder;

[0026] (2) 1 gram of methyl vinyl silicone rubber, 0.1 gram of benzoyl peroxide, 0.3 gram of hydroxyl silicone oil and processed alumina powder are mixed and ground evenly;

[0027] (3) Put the rubber into a mold that has been preheated to 125°C after 4 hours, close the mold and pressurize to 6MPa, hold the heat for 10 minutes, wait for the mold to cool to 90°C, and then open the mold and take out the sample, the sample size is 35mm×35mm ×1mm square sheet;

[0028] (4) Put the vulcanized sample on the glass cloth, put it in the air-blast drying oven and raise it from room temperature to 150°C for 1 hour, and then rise to 200°C for 1 hour, keep it at 200°C for 2 hours, and wait for it to dry in the oven. Take out the sample after cooling;

[0029] (5) via UNITHERM TM MO...

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Abstract

The present invention discloses preparation process of thermally conductive and electrically insulating silicone rubber composite material. The preparation process includes the following steps: 1. mixing tabular alumina and alcohol solution of polyglycol to prepare alumina slurry or powder; 2. mixing high temperature sulfurized silicone rubber, alumina slurry, hydroxyl silicone oil and vulcanizer in certain weight proportion; 3. sulfurizing and forming through molding at certain temperature to form required product; and 4. the secondary sulfurizing of the product in a forced air drying tank. The composite material of the present invention has raised thermal conductivity coefficient, high compatibility between alumina and silicone rubber, and low cost.

Description

technical field [0001] The invention relates to a preparation method of a high thermal conductivity insulating silicone rubber composite material. Background technique [0002] Thermally conductive rubber is a type of rubber-based composite material that focuses on thermal conductivity. The improvement of thermal conductivity is usually accompanied by the optimization of heat dissipation. Heat dissipation is extremely important to electronic products. Statistics show that the reliability of electronic components decreases by 10% for every 2°C increase in temperature; the service life at 50°C is only 1 / 6 of that at 25°C. Thermally conductive rubber is widely used in aviation, aerospace, electronics, and electrical fields that require heat dissipation and heat transfer. With the advancement of industrial production and science and technology, higher requirements are placed on its performance. It is hoped that it can provide electronic components The safe and reliable heat dis...

Claims

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Application Information

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IPC IPC(8): C08L83/08C08K3/22C08J3/24C08L83/06
Inventor 李继彦吴伯麟
Owner LIANYUNGANG LIANLIAN CHEM CO LTD
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