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Crystal whisker reinforced organic silicon heat conducting material and preparation method thereof

A heat-conducting material, silicone technology, applied in the field of silicone polymer materials, to achieve the effects of enhanced toughness, high compressibility, and high gas permeability

Inactive Publication Date: 2015-04-22
HUIZHOU KINGBALI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technology, a certain proportion of whisker materials is added, and silicone resin is used as the matrix combined with high thermal conductivity insulating fillers to prepare whisker-reinforced thermal conductivity and insulation composite materials by calendering, but there are very few cases in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 The whisker-reinforced silicone heat-conducting material of the present invention was prepared using the following formula (1#): 20 parts of liquid silicone resin, 75.5 parts of alumina, needle-shaped or fibrous alumina crystals with an aspect ratio of 10-100 1 part of whiskers, 0.2 parts of platinum catalyst, 0.3 parts of hydrogen-containing silicone oil with 0.3% hydrogen content, 0.5-10 parts of silicone coupling agent, and 3 parts of flame retardant. The preparation method is as follows:

[0026] (1) Use a coupling agent to surface-treat the thermally conductive insulating filler, then put the surface-treated thermally conductive insulating filler, silicone resin, whiskers, and flame retardant into the internal mixer in sequence for 0.5 hours, and then mix in a vacuum degree of Dry at 0.05MPa for 10min, continue banburying and blending for 1 hour, take it out and dry at a vacuum of 0.05MPa for 10min, control the temperature of the internal mixer at 180-220°...

Embodiment 2

[0028] Example 2 The whisker-reinforced silicone heat-conducting material of the present invention was prepared using the following formula (2#): 20 parts of liquid silicone resin, 75 parts of alumina, needle-shaped or fibrous alumina crystals with an aspect ratio of 10-100 1.5 parts of whiskers, 0.2 parts of platinum catalyst, 0.3 parts of hydrogen-containing silicone oil with a hydrogen content of 0.3%, 0.5-10 parts of organic silicon coupling agent, and 3 parts of flame retardant. The preparation method is the same as in Example 1.

Embodiment 3

[0029] Example 3 The whisker-reinforced silicone heat-conducting material of the present invention was prepared by using the following formula (3#): 15-30 parts of liquid silicone resin, 74. parts of aluminum oxide, needle-shaped or fibrous and with an aspect ratio of 10-100 2 parts of alumina whiskers, 0.2 parts of platinum catalyst, 0.3 parts of hydrogen-containing silicone oil with a hydrogen content of 0.3%, 0.5-10 parts of organic silicon coupling agent, and 3 parts of flame retardant. The preparation method is the same as in Example 1.

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PUM

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Abstract

The invention discloses a crystal whisker reinforced organic silicon heat conducting material and a preparation method thereof. The crystal whisker reinforced organic silicon heat conducting material is prepared from organic silicon resin, heat conducting insulating filler, crystal whiskers, a platinum catalyst, hydrogen-containing silicon oil, a coupling agent and other additives which are subjected to processes such as surface treatment, vacuum smelting and rolling. By adding the inorganic crystal whiskers and the heat conducting insulating filler, the heat conductivity coefficient of the organic silicon material can be increased, the mechanical properties of the organic silicon material can be improved as well, and the organic silicon material has better toughness and more balanced mechanical properties and can be widely applied to electronic heat conduction fields of electrons, automobiles, LED lamps and the like.

Description

technical field [0001] The invention relates to a whisker-reinforced organosilicon heat-conducting material and a preparation method thereof, belonging to the technical field of organosilicon polymer materials. Background technique [0002] Silicone products are based on silicon-oxygen (Si-O) bonds as the main chain structure, so silicone products have the characteristics of high thermal stability, high weather resistance, electrical insulation performance, low surface tension and low surface energy, and physiological inertia. , due to the above-mentioned excellent properties of silicone, its application range is very wide. It is not only used as a special material in aviation, cutting-edge technology, and military technology departments, but also in various sectors of the national economy. Its application range has expanded to: construction, electronics, textiles, automobiles, machinery, leather and paper, chemical industry Metals and paints, medicine and medical treatment...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/05C08K13/06C08K9/06C08K3/38C08K3/22C08K7/08
Inventor 杨永佳张彦兵杨小义
Owner HUIZHOU KINGBALI TECH
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