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Phase change graphite heat conduction material with high thermal conductivity and preparation method

A technology of graphite heat conduction and heat conduction materials, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as inability to meet heat dissipation requirements, and achieve excellent interface heat conduction effects, excellent wetting effects, and good storage stability.

Inactive Publication Date: 2016-02-24
SHENZHEN DARBOND INTERFACE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the fact that most of the existing thermal interface materials cannot meet the current higher and higher heat dissipation requirements, and provide a phase-change graphite thermal conductivity material with high thermal conductivity

Method used

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  • Phase change graphite heat conduction material with high thermal conductivity and preparation method
  • Phase change graphite heat conduction material with high thermal conductivity and preparation method
  • Phase change graphite heat conduction material with high thermal conductivity and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The components and the content of each part of the phase change thermal conductive material are as follows:

[0023]

[0024] Specific preparation method:

[0025] Add fully refined No. 58 paraffin wax, antioxidant 1076, and coupling agent γ-methacryloxypropyltrimethoxysilane in the planetary power mixer according to the formula ratio, raise the temperature to 70 degrees Celsius, and stir for 45 Minutes into a uniform paste;

[0026] Then add the crosslinking agent trimethoxysilane and stir for 10 minutes until the crosslinking agent is completely dissolved;

[0027] Add graphite thermally conductive particles D50 = 2-3 microns in batches, stir for 75 minutes, observe that the mixture is uniform, and perform vacuum defoaming for 45 minutes to obtain phase change graphite thermally conductive material sample 1.

Embodiment 2

[0029] The components and the content of each part of the phase change thermal conductive material are as follows:

[0030]

[0031]

[0032] Specific preparation method:

[0033] Add low melting point wax PE80, 2,2'-methylene-bis-(4-methyl, 6-tert-butylphenol) and coupling agent isopropyl trioil into the planetary power mixer according to the formula ratio Acid acyloxy titanate, raise the temperature to 70 degrees Celsius, stir for 45 minutes to form a uniform paste;

[0034] Then add the crosslinking agent trimethoxysilane and stir for 10 minutes until the crosslinking agent is completely dissolved;

[0035] Add graphite thermally conductive particles D50 = 3-5 microns in batches, stir for 75 minutes, observe that the mixture is uniform, and perform vacuum defoaming for 45 minutes to obtain phase change graphite thermally conductive material sample 2.

Embodiment 3

[0037] The components and the content of each part of the phase change thermal conductive material are as follows:

[0038]

[0039] Specific preparation method:

[0040] Add microcrystalline wax 70#, antioxidant 1076, and coupling agent γ-methacryloxypropyl trimethoxysilane into the planetary power mixer according to the formula ratio, raise the temperature to 70 degrees Celsius, and stir for 45 Minutes into a uniform paste;

[0041] Then add the cross-linking agent titanium acetylacetonate and stir for 10 minutes until the cross-linking agent is completely dissolved;

[0042] Add graphite thermally conductive particles D50 = 2-3 microns in batches, stir for 75 minutes, observe that the mixture is uniform, and perform vacuum defoaming for 45 minutes to obtain phase change graphite thermally conductive material sample 3.

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Abstract

The invention provides a phase change graphite heat conduction material with high thermal conductivity. The phase change graphite heat conduction material with high thermal conductivity is composed of the following substances: 10-25% of base phase change resin, 0-5% of an antioxidant, 0-5% of a crosslinking agent, 1-5% of a coupling agent, and 40-80% of graphite heat conductive particles. The phase change graphite heat conduction material provided by the invention can be used for radiator interface heat dissipation and the like in the heat source component / LED assembly technology of semiconductor surface packaging, and greatly improves the heat dissipation effect and long-term reliability of heat source components and LED radiators. The product has the advantages of excellent surface wetting performance and fast and effective heat dissipation effect, good electrical performance, low cost, and especially excellent long term use effect. The preparation method of the product is simple, can be applied to mechanical process and manual use, etc., can meet the increasingly high heat dissipation requirements of high-end electronic products, like PC, game machines and high power LED.

Description

technical field [0001] The invention relates to a phase-change graphite heat-conducting material with high thermal conductivity and a preparation method thereof, and is especially suitable for interface heat dissipation of heat source components in semiconductor surface packaging or radiators in an LED assembly process. Background technique [0002] With the vigorous development of electronic technology in the 21st century, the heat density of various electronic components is getting higher and higher, and the heat dissipation problem has become a crucial consideration in the design of electronic products. [0003] Compared with the heat-conducting silicone grease commonly found in the market, the present invention has low initial thermal resistance and excellent heat transfer performance; because it is a phase-change material, the product changes form as the temperature changes, from solid to liquid, and can provide a certain amount of latent heat ;The product returns to th...

Claims

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Application Information

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IPC IPC(8): C08L91/06C08L23/06C08K13/02C08K3/04C09K5/06
CPCC08K13/02C08K3/04C08K2201/003C09K5/066C08L91/06C08L23/06
Inventor 邓志军万炜涛陈田安
Owner SHENZHEN DARBOND INTERFACE MATERIALS
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