High-thermal-conductivity insulating silica gel gasket and preparation method thereof

An insulating silica gel, high thermal conductivity technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of high price and low thermal conductivity, achieve high thermal conductivity, reduce costs, and broaden the scope of application.

Pending Publication Date: 2021-03-09
JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the thermal conductivity of thermal silica sheets in the domestic market is generally low, which limits

Method used

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  • High-thermal-conductivity insulating silica gel gasket and preparation method thereof
  • High-thermal-conductivity insulating silica gel gasket and preparation method thereof
  • High-thermal-conductivity insulating silica gel gasket and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0035] The present invention also proposes the preparation method of the above-mentioned high-conducting insulating silicone gasket, including the following steps: according to the weight ratio, the respective components are determined, and the vinyl silicone oil, heat-conducting filler, modifier is solid vacuum, and the base is obtained. Glue; then mixed the base gum, crosslinking agent, inhibitor, and mixed 20-30 min, and finally mixed with a platinum catalyst for 15-20 min, resulting in a mixed rubber, and then placed on the calapping machine and passed a certain temperature gradient prolonged curing molding. The heat-conductive silica gasket is obtained.

[0036] Preferably, the temperature range of the translator boofer is divided into three temperature sections of 60-80 ° C, 90-110 ° C, 120-150 ° C.

Example Embodiment

[0037] Example 1

[0038] High heat insulating silicone gasket, the raw material comprises 100 parts by mass: 500 MPa.s of the vinyl silicone oil, 1500 modified spherical alumina, 500 nanoside, 3 parts of 202 high hydrogen silicone oil, UC- 2 parts of 616 terminal hydrogen silicone oil, 3 parts of hexamethyl silicon, 1 platinum catalyst, 0.05 servic alklene inhibitor;

[0039] Among them, in the preparation of modified spherical alumina, dodechacmethoxysilane is mixed with methanol, water, and ammonia water regulates pH to alkaline, and spherical alumina is added, and the temperature is warmed to 75 ° C, stirring is stirred for 3 h, Cooled to room temperature, then washed 3 times with methanol and vacuum filtration, 80 ° C for 24 h to obtain diethyltrimethoxysilane-modified spherical alumina; wherein dodechamethoxysilane and spherical alumina were obtained. The mass ratio is 4: 100.

[0040]The above-mentioned preparation method of the above high-conducting insulating silica, incl...

Example Embodiment

[0042] Example 2

[0043] High thermal insulating silicone gasket, the raw material comprises: 500 mPa.S vinyl silicone oil, 700 modified spherical alumina, 100 parts of cubic boron, 202 high hydrogen-containing silicone oil, UC-616 1.5 parts of the hydrogen silicone oil, 4 parts of vinyl triethoxysilane, 1 platinum catalyst, or 0.05 servic alklene inhibitors;

[0044] Among them, in the preparation of modified spherical alumina, dodechacmethoxysilane is mixed with methanol, water, and ammonia water regulates pH to alkaline, and spherical alumina is added, and the temperature is warmed to 75 ° C, stirring is stirred for 3 h, Cooled to room temperature, then washed 3 times with methanol and vacuum filtration, 80 ° C for 24 h to obtain diethyltrimethoxysilane-modified spherical alumina; wherein dodechamethoxysilane and spherical alumina were obtained. The mass ratio is 3: 100.

[0045] The above-mentioned preparation method of the above high-conducting insulating silica, including t...

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Abstract

The invention discloses a high-thermal-conductivity insulating silica gel gasket comprising the following raw materials in parts by mass: 100 parts of vinyl silicone oil, 800-2000 parts of a thermal conductive filler, 2-5 parts of a cross-linking agent, 2-8 parts of a modifier, 1-3 parts of a platinum catalyst and 0.05-0.1 part of an inhibitor, wherein the thermal conductive filler is composed ofat least one of nano aluminum nitride, cubic boron nitride and nano silicon carbide and dodecyltrimethoxysilane modified spherical aluminum oxide. The invention further provides a preparation method of the high-thermal-conductivity insulating silica gel gasket. Through filler modification treatment and compounding design, the product has excellent properties of high thermal conductivity, high insulation, chemical stability and the like, the thermal conductivity coefficient can reach 8 W/(m*K) or above, and the product is used in the fields of consumer electronics, 5G communication, high-powerchips and the like with high heat dissipation requirements.

Description

technical field [0001] The invention relates to the technical field of heat conduction and heat dissipation, in particular to a high heat conduction insulating silicone gasket and a preparation method thereof. Background technique [0002] With the development of industrial production and science and technology, thermally conductive silicone sheet is used as a high-performance thermally conductive interface material to fill the gap between the heating device and the heat sink or metal base. Its flexibility and elasticity make it suitable for covering different The flat surface can form a good heat conduction path, and also play the role of insulation, shock absorption, and sealing. It is the most popular material in electronic products and electronic equipment. However, with the continuous upgrading of electronic products, the power consumption of equipment continues to increase, and the heat generation also increases. The market's heat conduction requirements for thermall...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08K9/06C08K7/18C08K3/28C08K5/5445C08K3/38C08K3/34C08K5/5419C08K9/02C09K5/14
CPCC08L83/04C09K5/14C08K2201/011C08K2003/282C08K2003/385C08L2205/03C08L2205/025C08K9/06C08K7/18C08K3/28C08K5/544C08K3/38C08K3/34C08K5/5419C08K9/02
Inventor 雷军徐晶晶李忠明鄢定祥张力
Owner JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD
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