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Thermally conductive silicone sheet as well as preparation method and application thereof, and thermally conductive heating silicone sheet as well as preparation method and application thereof

A heat-conducting silica gel sheet and silica gel sheet technology, applied in the field of silica gel sheets, can solve the problems of high temperature resistance, poor hardness, and low thermal conductivity, and achieve the effects of high stability, high heating power, and wide application range

Active Publication Date: 2019-08-27
杭州兆科电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main heat conduction mechanism of the thermally conductive silicone sheet is through heat conduction, but the thermal conductivity of the currently used thermally conductive silicone sheet is low, and its high temperature resistance and hardness are poor, thus limiting its application

Method used

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  • Thermally conductive silicone sheet as well as preparation method and application thereof, and thermally conductive heating silicone sheet as well as preparation method and application thereof
  • Thermally conductive silicone sheet as well as preparation method and application thereof, and thermally conductive heating silicone sheet as well as preparation method and application thereof
  • Thermally conductive silicone sheet as well as preparation method and application thereof, and thermally conductive heating silicone sheet as well as preparation method and application thereof

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preparation example Construction

[0071] According to another aspect of the present invention, there is provided a method for preparing the above-mentioned heat-conducting silica gel sheet, which includes the following steps: after uniformly mixing all raw materials, curing and molding to obtain the heat-conducting silica gel sheet. The method has a simple process and is suitable for mass production, and the prepared heat-conducting silica gel sheet has good heat-conducting performance and wide application range.

[0072] Preferably, the curing molding includes pressure curing molding. The production efficiency of pressure curing molding is high, the internal stress of the obtained product is small, the mechanical properties are relatively stable, the dimensional accuracy of the product is high, and the product consistency is good.

[0073] Preferably, the curing molding pressure is greater than 250kgfcm 2 , curing molding time is 20-30 seconds. The above curing molding pressure is typically but not limited ...

Embodiment 1

[0098] A heat-conducting silica gel sheet, prepared from the following raw materials in parts by mass: 10 parts of silicone rubber, 300 parts of aluminum oxide, 0.5 parts of aluminum hydroxide, 0.3 parts of silicon dioxide and 3 parts of hydrogen-containing silicone oil; The weight-average molecular weight is 700,000; the thickness of the heat-conducting silica gel sheet is 1.0 mm.

Embodiment 2

[0100] A heat-conducting silica gel sheet, prepared from the following raw materials in parts by mass: 100 parts of silicone rubber, 1000 parts of silicon carbide, 100 parts of aluminum oxide, 6 parts of talcum powder and 50 parts of platinum-based catalyst; the weight average of the silicone rubber The molecular weight is 900,000; the thickness of the heat-conducting silica gel sheet is 2.5mm.

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Abstract

The invention relates to the field of silicone sheets, and specifically provides a thermally conductive silicone sheet as well as a preparation method and application thereof, and a thermally conductive heating silicone sheet as well as a preparation method and application thereof. The thermally conductive silicone sheet is prepared from the following raw materials in parts by mass: 10-100 parts of silicone rubber, 300-1900 parts of a thermal conductive agent, 0.5-100 parts of a flame retardant agent, 0.3-6 parts of a reinforcing agent and 3-50 parts of a crosslinking agent, wherein the weightaverage molecular weight of the silicone rubber is 70-900,000. The thermally conductive silicone sheet has relatively high coefficient of thermal conductivity, reasonable hardness and relatively goodhigh temperature resistance, wherein the coefficient of thermal conductivity can reach 1-5 w / (m.k), and the hardness Shore OO is 40-80, so that the scope of application is wider.

Description

technical field [0001] The invention relates to the field of silica gel sheets, in particular, to a heat-conducting silica gel sheet, a preparation method and application thereof, a heat conduction heating silica gel sheet, and a preparation method and application thereof. Background technique [0002] Thermally conductive silicone sheet is a kind of thermally conductive medium material synthesized by special process with silica gel as the base material, adding various auxiliary materials such as metal oxides. It is also called thermally conductive silicone pad, thermally conductive silicon film, soft thermally conductive pad, Thermally conductive silicone gaskets, etc., are specially designed to transfer heat through gaps, used to reduce the contact thermal resistance between the surface of the heat source and the contact surface of the heat dissipation device, can fill the gap, and complete the heat transfer between the heating part and the heat dissipation part. It also p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/05C08K13/02C08K3/22C08K3/36C08K3/34C08K3/38C08K5/14C09K5/14H05K7/20
CPCC08L83/04C08K13/02C08K3/34C08K3/22C08K3/38C08K5/14C09K5/14H05K7/2039C08L2201/08C08L2203/20C08L2205/025C08K2003/2227C08K2201/014C08K2003/2241C08K2003/385C08K2003/222C08K3/36
Inventor 廖志盛李峰
Owner 杭州兆科电子材料有限公司
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