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High-heat-conductivity silicone grease and preparation method thereof

A heat-conducting silicone grease and high heat-conducting technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of large difference in density between heat-conducting fillers and silicone oil, affecting the working life of devices, and reducing heat conduction and heat dissipation performance, etc., to achieve improvement Dispersion effect, low oil yield, effect of improving thermal stability

Inactive Publication Date: 2019-03-08
深圳联腾达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing heat-conducting silicone grease is usually made by mixing silicone oil and heat-conducting inorganic filler, but the density difference between heat-conducting filler and silicone oil is large, and the compatibility is poor, so that it often appears in an unstable state during use, resulting in oil powder separation , resulting in a significant reduction in thermal conductivity and heat dissipation performance, seriously affecting the working life of the device

Method used

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  • High-heat-conductivity silicone grease and preparation method thereof
  • High-heat-conductivity silicone grease and preparation method thereof
  • High-heat-conductivity silicone grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Put 50 parts of methyl silicone oil and 10 parts of γ-(methacryloyloxy)propyltrimethoxysilane into the kneader, stir for 5 minutes to obtain a mixture, and then add 500 parts of the median particle size to the mixture three times Spherical alumina powders of 10 microns, 5 microns and 0.5 microns, the weight ratio of the three powders is 14:6:1, kneaded in vacuum at 80°C for 2 hours, after cooling the kneaded rubber, in three Grind three times in a roller grinder to obtain thermal conductive silicone grease. The obtained thermal conductive silicone grease was tested for thermal conductivity according to the ISO22007-2 standard, and the test results are shown in Table 1.

Embodiment 2

[0039] Put 100 parts of methyl silicone oil and 35 parts of γ-(methacryloyloxy)propyltrimethoxysilane into the kneader, stir for 5 minutes to obtain a mixture, and then add 800 parts of the median particle size to the mixture three times Spherical alumina powders of 10 microns, 5 microns and 0.5 microns, the weight ratio of the three powders is 14:6:1, kneaded in vacuum at 80°C for 2 hours, after cooling the kneaded rubber, in three Grind three times in a roller grinder to obtain thermal conductive silicone grease. The obtained thermal conductive silicone grease was tested for thermal conductivity according to the ISO22007-2 standard, and the test results are shown in Table 1.

Embodiment 3

[0041] Modification of thermally conductive fillers: γ-(methacryloyloxy)propyltrimethoxysilane is configured into a 2% solution with 95% alcohol aqueous solution, and after hydrolysis for 5 minutes, the median particle size is 10 microns , 5 micron, 0.5 micron alumina powders are graded according to the ratio of 14:6:1 and added to the solution, and then the treated powder is rinsed with ethanol solution and dried at 100°C to obtain a modified thermally conductive filler .

[0042] Add 50 parts of methyl silicone oil to the kneader, and then add 1000 parts of modified thermally conductive filler in three times, knead in vacuum at 80°C for 2 hours, cool the kneaded rubber, and grind it in a three-roll mill for three times , to obtain thermal conductive silicone grease. The obtained thermal conductive silicone grease was tested for thermal conductivity according to the ISO22007-2 standard, and the test results are shown in Table 1.

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Abstract

The invention discloses high-heat-conductivity silicone grease which comprises, by weight, 50-100 parts of basic silicone oil, 500-1000 parts of heat-conducting filler and 10-50 parts of surface modifier and auxiliaries, wherein the heat-conducting filler is formed by grading at least two heat-conducting powder different in grain size. The invention further discloses a preparation method of the heat-conducting silicone grease. By modifying the heat-conducting filler which is formed by grading at least two heat-conducting powders different in particle size, the heat-conducting silicone grease prepared by the method is up to higher than 5W / m K in heat conductivity, low in heat resistance and better than conventional heat-conducting silicone grease in heat-conducting performance.

Description

【Technical field】 [0001] The invention relates to thermal conductive silicone grease and a preparation method thereof, in particular to a high thermal conductive silicone grease with high thermal conductivity, good insulation performance, low oil yield and long service life and a preparation method thereof. 【Background technique】 [0002] Thermally conductive silicone grease is a thermally conductive silicone grease composition made of silicone oil as the main raw material and thermally conductive fillers with excellent heat resistance. Because of its low thermal resistance, low price and good interface wettability, it has the characteristics of other thermally conductive interface materials It has an irreplaceable role and is widely used among various heat sinks and heat-generating power devices. At present, thermal conductive silicone grease is mainly coated on the contact surface between heating elements and heat dissipation facilities in various electronic products and e...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K9/06C08K7/18C09K5/14
CPCC08K7/18C08K9/06C08K2201/003C08K2201/014C08L2201/08C09K5/14C08L83/04
Inventor 罗裕锋
Owner 深圳联腾达科技有限公司
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