Method for preparing large power LED (light-emitting diode) high thermal conductivity silicone grease

A high thermal conductivity, high power technology, applied in polymer adhesive additives, non-polymer adhesive additives, adhesive additives and other directions, can solve the problems of short storage period, early delamination, short service life, etc. Achieving the effect of delaying time, maintaining long-term effectiveness, and maintaining thermal conductivity

Inactive Publication Date: 2013-10-02
ZHEJIANG JOINLEADER SILICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly solves the deficiencies existing in the prior art, and provides a silicone grease composition with high thermal conductivity, which mainly solves the problem that the existing heat-conducting silicone grease with a high filling amount of heat-conducting powder is prone to oil-solid separation and early stratification. A preparation method of high-power LED high thermal conductivity silicone grease with short storage period and short service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: A kind of preparation method of high-power LED high thermal conductivity silicone grease is carried out according to the following steps:

[0014] Mix 10 parts of silicone oil and 80 parts of heat-conducting powder evenly through a planetary machine. The speed of the planetary machine is 500 rpm, the running time of the planetary machine is 30 minutes, and the temperature of the planetary machine is above 100°C; after mixing evenly, enter In the zirconia grinding machine, the grinding frequency of the zirconia grinding machine is more than 3 times. After grinding, it enters the planetary machine for degassing and vacuuming. The speed of the planetary machine is 500 rpm. It is prepared by stirring for 1 hour when the vacuum degree is below -0.09MPa.

[0015] The silicone oil is vinyl silicone oil.

[0016] The thermally conductive powder is magnesium oxide; the mesh of the thermally conductive powder is above 2000 mesh.

[0017] The thixotropic age...

Embodiment 2

[0018] Embodiment 2: A kind of preparation method of high-power LED high thermal conductivity silicone grease, carry out according to the following steps:

[0019] Mix 12 parts of silicone oil and 82 parts of heat-conducting powder evenly through a planetary machine. In the zirconia grinding machine, the grinding frequency of the zirconia grinding machine is more than 3 times. After grinding, it enters the planetary machine for degassing and vacuuming. The speed of the planetary machine is 550 rpm. Prepared by stirring for 1.5 hours when the vacuum degree is below -0.09MPa.

[0020] The organosilicon oil is a mixture of vinyl silicone oil, hydrogen-containing silicone oil and benzyl silicone oil.

[0021] The heat-conducting powder is a mixture of magnesium oxide, zinc oxide and aluminum oxide; the mesh of the heat-conducting powder is above 2000 mesh.

[0022] The thixotropic agent is a mixture of fumed white carbon black and hydrogenated castor oil.

Embodiment 3

[0023] Embodiment 3: A kind of preparation method of high-power LED high thermal conductivity silicone grease is carried out according to the following steps:

[0024] Mix 15 parts of silicone oil and 85 parts of heat-conducting powder evenly through a planetary machine. In the zirconia grinding machine, the grinding frequency of the zirconia grinding machine is more than 3 times. After grinding, it enters the planetary machine for degassing and vacuuming. The speed of the planetary machine is 600 rpm. It is prepared by stirring for 2 hours when the vacuum degree is below -0.09MPa.

[0025] The organosilicon oil is a mixture of vinyl silicone oil, hydrogen-containing silicone oil, phenylmethyl silicone oil, hydroxyl silicone oil, dimethyl silicone oil, methyl long-chain alkyl silicone oil, and quaternary ammonium salt hydrocarbon-based silicone oil.

[0026] The heat-conducting powder is a mixture of magnesium oxide, zinc oxide, aluminum oxide, aluminum nitride, silico...

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Abstract

The invention relates to high thermal conductivity silicone grease, and particularly relates to a method for preparing large power LED (light-emitting diode) high thermal conductivity silicone grease, and the silicone grease is used as a sealant of a large power LED and an adhesive. Organic silicone oil and heat conduction powder are mixed uniformly by a planet machine and then enter a zirconia grinding miller to be grinded for over three times by the zirconia grinding miller, after being grinded, the organic silicone oil and the heat conduction powder enter the planet machine for defoaming and vacuumization, simultaneously, a thixotropic agent is added, and the silicone grease is prepared through stirring for 1-2 hours when the vacuum degree is minus 0.09MPa. According to the method, the thermal conductivity is greatly improved through high loading level of the heat conduction powder and the thixotropic agent, so that the time for separating oil from solid of the thermal conductivity silicone grease is effectively delayed, and the high thermal conductivity of the silicone grease is guaranteed to be effective for a long time.

Description

technical field [0001] The invention relates to a high thermal conductivity silicone grease, in particular to a preparation method of a high-power LED high thermal conductivity silicone grease, which is used as a sealant and an adhesive for high-power LEDs. Background technique [0002] In the prior art, because the semiconductor lighting source LED (light-emitting diode) has significant characteristics such as high efficiency, energy saving, environmental protection, long service life, and easy maintenance, it is considered to be a new type of solid-state cold light source that may replace incandescent and fluorescent lighting. However, heat dissipation has become one of the biggest obstacles that limit the improvement of LED power. The only way to solve the heat dissipation problem is to use high thermal conductivity insulating materials to effectively transmit heat! [0003] At present, the silicone grease composition with high thermal conductivity often has a solid cont...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/04C09J11/06C09J11/08
Inventor 费海舟王洪敏赵亮
Owner ZHEJIANG JOINLEADER SILICON
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