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Heat-conducting silicone grease composition

A technology of thermal conductive silicone grease and composition, applied in the field of polymer interface materials and interface materials, can solve problems such as increasing production costs, and achieve the effects of low physiological inertia, high compression resistance, and large heat transfer specific surface area

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

The addition of some thermally conductive materials such as carbon nanotubes, phase change capsules, etc., increases the production cost to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 The following raw materials were used in parts by weight: 36 parts of methyl ethoxy silicone oil, 22 parts of hexagonal boron nitride with a particle size of 1000 mesh, 26 parts of spherical alumina, 11 parts of waste rubber nanopowder with a particle size of 5-10 μm, 0.5 parts of silyl quaternary ammonium salt phase transfer catalyst, 6 parts of silicone oil, 9 parts of methoxysilane, 2.5 parts of organosiloxane surface modifier, 1 part of antioxidant 168, 2 parts of antioxidant 1010, using The following steps prepare the thermally conductive silicone grease composition of the present invention:

[0018] (1) Heat hexagonal boron nitride and organosiloxane surface modifier to 190°C while stirring;

[0019] (2) Add half of alumina, waste rubber nano-powder and methoxysilane into the high-speed disperser, and stir at a speed of 9000r / min for 10 minutes; then add the mixed material in step (1), continue stirring for 10 minutes, and heat up to 200°C , add silicon...

Embodiment 2

[0021] Example 2 The following raw materials were used in parts by weight: 22 parts of methyl ethoxy silicone oil, 12 parts of hexagonal boron nitride with a particle size of 2000 mesh, 15 parts of spherical alumina, 17 parts of waste rubber nanopowder with a particle size of 0.1-1 μm, 0.1 part of silane-based quaternary ammonium salt phase transfer catalyst, 5 parts of silicone oil, 10 parts of aminosilane, 1.5 parts of organosiloxane surface modifier, 4 parts of antioxidant 168, 0.5 part of antioxidant 1010, the following steps are used Prepare the thermally conductive silicone grease composition of the present invention:

[0022] (1) Heat hexagonal boron nitride and organosiloxane surface modifier to ℃ while stirring and mixing;

[0023] (2) Put half of alumina, waste rubber nano-powder and aminosilane into the high-speed disperser, and stir at a speed of 1000r / min for 8 minutes; then add the mixed material in step (1), continue stirring for 8 minutes, heat up to 210°C, add...

Embodiment 3

[0025] Example 3 The following raw materials were used in parts by weight: 50 parts of methyl ethoxy silicone oil, 28 parts of hexagonal boron nitride with a particle size of 3000 mesh, 33 parts of spherical alumina, 17 parts of waste rubber nanopowder with a particle size of 1-5 μm, 0.2 parts of silyl quaternary ammonium salt phase transfer catalyst, 3 parts of silicone oil, 5 parts of ethoxysilane, 2.5 parts of organosiloxane surface modifier, 1 part of antioxidant 168, 0.5~3 parts of antioxidant 1010 , adopt the following steps to prepare the thermally conductive silicone grease composition of the present invention:

[0026] (1) Heat hexagonal boron nitride and organosiloxane surface modifier to 200°C while stirring and mixing;

[0027] (2) Add half of the aluminum oxide, waste rubber nano-powder and ethoxysilane into the high-speed disperser, and stir at a speed of 800r / min for 5min; then add the mixed material in step (1), continue stirring for 10min, and heat up to 220°C...

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Abstract

The invention discloses a heat-conducting silicone grease composition which is prepared from methyl ethoxy silicone oil, hexagonal boron nitride, aluminum oxide, scrap rubber nano-powder, a silane-based quaternary ammonium salt phase transfer catalyst, organic silicone oil, a silane coupling agent, an organic siloxane surface modification agent, an antioxidant 168 and an antioxidant 1010. According to the heat-conducting silicone grease composition, a product is high in performance cost ratio by compounding the hexagonal boron nitride, the aluminum oxide and the scrap rubber nano-powder as heat-conducting insulating fillers; in addition, the scrap rubber nano-powder with a small particle diameter can be used for enhancing the flowability of the product in a preparation process and filling a gap to obtain larger heat-transfer specific surface area, so that a final heat-conducting silicone grease composition product has the advantages of excellent heat conductivity, electrical insulation, weather resistance, hydrophobicity, physiological inertia and less surface tension, lower viscosity-temperature coefficient, higher compression resistance and no corrosion effect, can be used for well filling the gap between an electronic element and a radiating fin and is a very good medium material of the electronic element.

Description

technical field [0001] The invention relates to an interface material, in particular to a heat-conducting silicone grease composition, and belongs to the technical field of polymer interface materials. Background technique [0002] Thermally conductive silicone grease is commonly known as heat dissipation paste. Thermally conductive silicone grease is mostly made of organic silicone as the main raw material, adding materials with excellent heat resistance and thermal conductivity to make a thermally conductive silicone grease compound. It is used in power amplifiers, transistors, electronic tubes, Heat conduction and heat dissipation of electronic components such as CPU, so as to ensure the stability of electrical performance of electronic instruments and meters. Since the silicone grease composition is often closer to the heat source than the radiator, its heat resistance directly determines the life and reliability of the system. Therefore, thermally conductive silicone g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08L21/00C08K13/06C08K3/38C08K9/06C08K3/22C08K5/526C08K5/134
Inventor 杨永佳张彦兵杨小义
Owner HUIZHOU KINGBALI TECH
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