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Low-cost radiating silica gel sheet and preparation method thereof

A heat-dissipating silica gel, low-cost technology, applied in the field of heat-dissipating silica gel, can solve the problems of high thermal conductivity and high price, and achieve the effect of reducing cost, improving service life and stability

Active Publication Date: 2012-07-11
SHENZHEN DARBOND INTERFACE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermally conductive fillers generally use alumina or zinc oxide. When alumina is used as a thermally conductive filler, its thermal conductivity is high and the particle size distribution is wide, but the price is also high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Calculated based on the weight of vinyl silicone oil 100g

[0016] Add 100 parts of vinyl silicone oil (0.2% vinyl content), 3 parts of methyl silicone oil, 7 parts of hydrogen-containing silicone oil (0.30% active hydrogen content), 500 parts of zinc oxide, and 100 parts of aluminum oxide into the stirring tank at 60- Stir at 80°C for 2 hours, the speed is 300r~500rpm, after stirring evenly, add 3 parts of fumed silica and 2 parts of silane coupling agent, stir for 30 minutes; cool to room temperature, add 0.5 parts of catalyst and stir for 30 minutes, the speed is 150r ~180rpm, vacuumize to remove air bubbles and obtain a paste. Calender the paste material in the middle of the PET film into a sheet with a thickness of 0.5-5.0mm, cut it into a size of 250mm×300mm, and cure it at 150°C for 1 hour to obtain a heat-dissipating silicone pad.

[0017] According to the standard test method for heat transfer characteristics of thermally conductive electrical insulating mater...

Embodiment 2

[0019] Calculated based on the weight of vinyl silicone oil 100g

[0020] Add 100 parts of vinyl silicone oil (0.36% vinyl content), 6 parts of methyl silicone oil, 11 parts of hydrogen-containing silicone oil (0.33% active hydrogen content), 680 parts of zinc oxide, and 70 parts of aluminum oxide into the stirring tank at 60- Stir at 80°C for 2 hours, the speed is 300r~500rpm, after stirring evenly, add 6 parts of fumed silica and 3.8 parts of silane coupling agent, stir for 30 minutes; cool to room temperature, add 0.8 parts of catalyst and stir for 30 minutes, the speed is 150r ~180rpm, vacuumize to remove air bubbles and obtain a paste. Calender the paste material in the middle of the PET film into a sheet with a thickness of 0.5-5.0mm, cut it into a size of 250mm×300mm, and cure it at 150°C for 1 hour to obtain a heat-dissipating silicone pad.

[0021] According to the standard test method for heat transfer characteristics of thermally conductive electrical insulating ma...

Embodiment 3

[0023] Calculated based on the weight of vinyl silicone oil 100g

[0024] Add 100 parts of vinyl silicone oil (0.5% vinyl content), 8 parts of methyl silicone oil, 15 parts of hydrogen-containing silicone oil (0.35% active hydrogen content), 800 parts of zinc oxide, and 40 parts of aluminum oxide into the stirring tank at 60- Stir at 80°C for 2 hours, the speed is 300r~500rpm, after stirring evenly, add 8 parts of fumed silica and 5 parts of silane coupling agent, stir for 30 minutes; cool to room temperature, add 1.2 parts of catalyst and stir for 30 minutes, the speed is 150r ~180rpm, vacuumize to remove air bubbles and obtain a paste. Calender the paste material in the middle of the PET film into a sheet with a thickness of 0.5-5.0mm, cut it into a size of 250mm×300mm, and cure it at 150°C for 1 hour to obtain a heat-dissipating silicone pad.

[0025] According to the standard test method for heat transfer characteristics of thermally conductive electrical insulating mater...

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Abstract

The invention relates to a radiating silica gel material, in particular to a low-cost radiating silica gel sheet and a preparation method thereof. The radiating silica gel sheet consists of the following components in part by weight: 100 parts of vinyl silicone oil, 3 to 8 parts of methyl silicone oil, 7 to 15 parts of hydrogen-containing silicone oil, 0.5 to 1.2 parts of catalyst, 2 to 5 parts of silane coupling agent, 3 to 8 parts of gaseous phase silicon dioxide, 500 to 800 parts of zinc oxide and 40 to 100 parts of aluminum oxide. The low-cost radiating silica gel sheet prepared from the raw materials is mainly used between heating devices and radiating devices to fill gaps of radiators in electronic industry, so that the service life of the radiators is prolonged, and the stability is improved; and the radiating silica gel sheet can be used at the temperature of between -50 and 200 DEG C for a long time, and the cost of radiating materials is reduced due to the addition of the zinc oxide.

Description

technical field [0001] The invention relates to the field of heat dissipation silica gel, in particular to a low-cost heat dissipation silica gel sheet. Background technique [0002] With the continuous advancement of science and technology, the application of high-power electronic components is becoming more and more common. These components continue to accumulate heat during long-term use. If the generated heat cannot be exported in time, the life of these devices will be greatly shortened, thereby affecting the life of the product. Heat dissipation silicone sheet has stable performance, moderate hardness, good heat dissipation effect, and is easy to use. It is more and more used in heating devices and heat dissipation devices. The heat dissipation material mainly realizes the heat dissipation function by adding appropriate heat conduction fillers in the formula. Thermally conductive fillers generally use alumina or zinc oxide. When alumina is used as a thermally conduct...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08L83/05C08K7/18C08K3/36C08K3/22C09K5/14
Inventor 王红玉王建斌陈田安解海华赵仁荔
Owner SHENZHEN DARBOND INTERFACE MATERIALS
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