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High thermal conductivity composite silicone gasket

A silica gel gasket and composite technology, applied in the field of silica gel mats, can solve the problems of poor thermal conductivity of silica gel mats, insufficient heat conduction channels of heat-conducting silica gel, and limited application range, etc., and achieve good insulation effect

Inactive Publication Date: 2019-05-21
贵州升皇兴实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Heat is mainly transferred through three ways: heat conduction, heat convection and heat radiation. For heat-conducting silica gel, its main heat-conducting mechanism is through heat conduction. The heat-conducting silica gel currently used has insufficient internal heat-conducting channels, resulting in the heat conduction of the silica gel pad. Poor performance, which limits its scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: A high thermal conductivity composite silica gel gasket, in parts by weight, including 500 parts of alumina particles, 190 parts of methyl silicone oil, 15 parts of polysiloxane, 19 parts of silicon dioxide, methyl vinyl 10 parts of silicone rubber, 5 parts of silane coupling agent, 2 parts of catalyst and 0.6 parts of inhibitor.

[0014] The alumina particles are spherical alumina particles, and the spherical alumina particles include large-diameter alumina particles and small-diameter alumina particles, wherein the large-diameter alumina particles have a particle diameter of 70 μm, and the small particle diameter The particle size of the aluminum oxide particles is 5 μm; the mass ratio of the large particle size alumina particles to the small particle size alumina particles is 1:3.

[0015] The inhibitors are acetylenic alcohol inhibitors.

Embodiment 2

[0016] Example 2: A high thermal conductivity composite silica gel gasket, including 400 parts of alumina particles, 150 parts of methyl silicone oil, 10 parts of polysiloxane, 15 parts of silicon dioxide, and methyl vinyl 5 parts of silicone rubber, 3 parts of silane coupling agent, 1 part of catalyst and 0.3 parts of inhibitor.

[0017] The alumina particles are spherical alumina particles, and the spherical alumina particles include alumina particles with large particle diameters and alumina particles with small particle diameters. The particle diameter of the large particle diameter alumina particles is 50 μm, and the small particle diameter The particle size of alumina particles is 3 μm; the mass ratio of large particle size alumina particles to small particle size alumina particles is 1:1.5.

[0018] The inhibitors are acetylenic alcohol inhibitors.

Embodiment 3

[0019] Example 3: A high thermal conductivity composite silica gel gasket, including 600 parts of alumina particles, 220 parts of methyl silicone oil, 20 parts of polysiloxane, 25 parts of silicon dioxide, and methyl vinyl 15 parts of silicone rubber, 8 parts of silane coupling agent, 3 parts of catalyst and 0.8 parts of inhibitor.

[0020] The alumina particles are spherical alumina particles, and the spherical alumina particles include alumina particles with large particle diameters and alumina particles with small particle diameters. The particle diameter of the large particle diameter alumina particles is 80 μm, and the small particle diameter The particle size of alumina particles is 7 μm; the mass ratio of large particle size alumina particles to small particle size alumina particles is 1:4.

[0021] The inhibitors are acetylenic alcohol inhibitors.

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Abstract

The invention discloses a high thermal conductivity composite silicone gasket. The high thermal conductivity composite silicone gasket is prepared from the following components in parts by weight: 400to 600 parts of alumina particles, 150 to 220 parts of methyl silicone oil, 10 to 20 parts of polysiloxane, 15 to 25 parts of silica, 5 to 15 parts of methyl vinyl silicone rubber, 3 to 8 parts of asilane coupling agent, 1 to 3 parts of a catalyst and 0.3 to 0.8 part of an inhibitor. Compared with the prior art, the high thermal conductivity composite silicone gasket disclosed by the invention has the advantages that silicone components are reasonably proportioned and the spherical alumina particles are screened, so that the alumina particles are reasonably distributed in a silicone matrix and the heat conductivity coefficient of the alumina particles is improved; and the silicone gasket has high insulating property and the heat conductivity coefficient is improved to 6.0 W or above which is out the reach by the prior art.

Description

technical field [0001] The invention relates to a silica gel pad, in particular to a high heat conduction compound type silica gel pad. Background technique [0002] Silicone rubber is a special synthetic rubber with silicon-oxygen bonds as the main chain, while ordinary rubber has a structure of C-C bonds as the main chain. Due to the particularity of its structure, it has high and low temperature resistance, high voltage resistance, ozone aging resistance, radiation resistance, high air permeability, and excellent chemical inertness to lubricating oil and other media. In addition, it has a wide temperature range (-50°C-250°C), good elasticity, good resistance to tracking and electrical corrosion, especially after its surface is polluted, it still has good hydrophobic properties. Therefore, it is of great significance to use silicone rubber as a thermally conductive matrix and compound it with high thermally conductive fillers to make an elastic thermally conductive insula...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/07C08K13/04C08K7/18C08K3/36
Inventor 万涛
Owner 贵州升皇兴实业有限公司
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