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Low-hardness and high-strength radiating silicone pad and preparation method thereof

A high-strength, low-hardness technology, applied in the field of heat-conducting silica gel, can solve problems such as low strength, failure to meet application requirements, and low hardness, and achieve the effects of low force, meeting production and application requirements, and high strength

Inactive Publication Date: 2015-03-25
SHENZHEN DARBOND INTERFACE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in some applications, high gasket strength is required but the elastic recovery force on the mating surface is small. Existing products generally have low hardness and low strength, which cannot meet the application requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0025] Weigh 100g of methyl silicone oil, 5g of vinyl silicone oil, 3g of two-component liquid silicone rubber, 0.2g of hydrogen-containing silicone oil, 0.1g of catalyst, 1g of silane coupling agent, 0.02g of inhibitor, and 150g of alumina.

[0026] Add methyl silicone oil, vinyl silicone oil, two-component liquid silicone rubber, hydrogen-containing silicone oil, and inhibitors into the stirring tank and stir for 1 hour at a speed of 20r-30rpm, then add alumina and stir for 0.5 hours at a speed of 10r-20rpm After stirring evenly, add silane coupling agent and stir for 0.5 hours at a speed of 20r-40rpm; add catalyst and stir for 0.5 hours at a speed of 10r-15rpm; vacuumize to remove air bubbles to obtain a paste.

[0027] The paste material is molded into a sheet with a thickness of 0.2-5 mm, cured at 120-150° C. for 0.5 hour, and cut into a sheet of 200 mm×200 mm to form the thermally conductive silicone pad.

specific Embodiment 2

[0029] Weigh 100g of methyl silicone oil, 10g of vinyl silicone oil, 8g of two-component liquid silicone rubber, 1g of hydrogen-containing silicone oil, 0.3g of catalyst, 3g of silane coupling agent, 0.05g of inhibitor, and 250g of alumina.

[0030] Add methyl silicone oil, vinyl silicone oil, two-component liquid silicone rubber, hydrogen-containing silicone oil, and inhibitors into the stirring tank and stir for 1 hour at a speed of 20r-30rpm, then add alumina and stir for 0.5 hours at a speed of 10r-20rpm After stirring evenly, add silane coupling agent and stir for 0.5 hours at a speed of 20r-40rpm; add catalyst and stir for 0.5 hours at a speed of 10r-15rpm; vacuumize to remove air bubbles to obtain a paste.

[0031] The paste material is molded into a sheet with a thickness of 0.2-5 mm, cured at 120-150° C. for 0.5 hour, and cut into a sheet of 200 mm×200 mm to form the thermally conductive silicone pad.

specific Embodiment 3

[0033] Weigh 100g of methyl silicone oil, 8g of vinyl silicone oil, 6g of two-component liquid silicone rubber, 0.6g of hydrogen-containing silicone oil, 0.2g of catalyst, 2g of silane coupling agent, 0.03g of inhibitor, and 200g of alumina.

[0034] Add methyl silicone oil, vinyl silicone oil, two-component liquid silicone rubber, hydrogen-containing silicone oil, and inhibitors into the stirring tank and stir for 1 hour at a speed of 120r-160rpm, then add alumina and stir for 0.5 hours at a speed of 60r-80rpm After stirring evenly, add silane coupling agent and stir for 0.5 hours at a speed of 20r-40rpm; add catalyst and stir for 30 minutes at a speed of 20r-40rpm; vacuumize to remove air bubbles to obtain a paste.

[0035] The paste material is molded into a sheet with a thickness of 0.2-5 mm, cured at 120-150° C. for 0.5 hour, and cut into a sheet of 200 mm×200 mm to form the thermally conductive silicone pad.

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Abstract

The invention relates to a low-hardness and high-strength radiating silicone pad and a preparation method thereof. The low-hardness and high-strength radiating silicone pad is prepared from the following components in parts by weight: 100 parts of methylsilicone oil, 5 to 10 parts of vinyl silicone oil, 3 to 8 parts of double-component liquid silicone rubber, 0.2 to 1 part of hydrogen-containing silicone oil, 0.1 to 0.3 part of a catalyst, 1 to 3 parts of a silane coupling agent, 0.02 to 0.05 part of an inhibitor, and 150 to 250 parts of aluminum oxide, wherein vinyl silicone oil contains 0.05 to 0.3% of vinyl and has the viscosity ranging from 200 to 1,000mPa.s; the double-component liquid silicone rubber is liquid silicone rubber prepared in mixing proportion of 1: 1 and has vulcanization hardness of ShoreA16 and tensile strength of 7MPa; the hydrogen-containing silicone oil contains 0.2 to 0.5% of reactive hydrogen; the catalyst is a platinum catalyst; the silane coupling agent is gamma-aminopropyl triethoxysilane; the inhibitor is an amino inhibitor; the aluminum oxide particles are prepared from aluminum oxide being 1 to 5 microns in particle size. The low-hardness and high-strength radiating silicone pad is extremely low in hardness, so that the binding face is low in stress; in addition, the pad is high in strength, and therefore, the requirement on production application can be met.

Description

technical field [0001] The invention relates to the field of heat-conducting silica gel, in particular to a low-hardness, high-strength heat-conducting silica gel pad and a preparation method thereof. Background technique [0002] Thermally conductive silicone sheet is a thermally conductive medium used to reduce the contact thermal resistance between the surface of the heat source and the contact surface of the heat dissipation device. Thermally conductive silicone sheet has good heat dissipation effect, is easy to use, and can timely export the heat accumulated by electronic components. It is more and more used in heating devices and heat dissipation devices, which greatly improves the service life of products. [0003] However, in some applications, high gasket strength is required but the elastic recovery force on the mating surface is small. Existing products generally have low hardness and low strength, which cannot meet the application requirements. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/05C08K3/22C08K5/544
Inventor 王红玉万炜涛
Owner SHENZHEN DARBOND INTERFACE MATERIALS