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Silicone grease with high thermal conductivity and preparation method of silicone grease

A high thermal conductivity, silicone grease technology, applied in the field of thermal conductive materials, can solve problems such as the inability to meet customer thermal performance requirements, the decline in thermal insulation performance of thermal grease, and adverse effects on product performance, and achieve good economic benefits and industrialized production prospects and costs. The effect of low, excellent electrical insulation properties

Inactive Publication Date: 2019-06-21
WUXI HITXINCHENG POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some people use a small amount of metal powder with high thermal conductivity as a reinforcement and fill it in thermally conductive silicone grease with high insulation performance. Although the thermal conductivity has been improved to a certain extent, the addition of metal powder will reduce the insulation performance of thermally conductive silicone grease. It cannot be used in products with high insulation performance requirements
Ordinary silicone grease uses ordinary dimethyl silicone oil, which has a relatively large oil loss rate after long-term use at high temperatures. With the reduction of silicone oil, ordinary silicone grease is likely to be pulverized, which will have a negative impact on product performance
In addition, the thermal conductivity of ordinary thermal conductive silicone grease is only 0.3~2.5W / (m·K), which can no longer meet the customer's requirements for thermal conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 11g of cerium oxide, 32g of antioxidant 1010, 0.3g of graphene LN-2P, 250g of 50CPS high temperature resistant simethicone oil into the container, ultrasonically disperse them evenly (0.5h~1h), then put them into a planetary mixer and add 62.5g Beryllium oxide and 2000g alumina GD-S404Z, stir and heat to 120°C, then add the remaining 62.5g beryllium oxide and 2000g alumina GD-S404Z thermal conductive filler, stir and vacuumize for 3 to 4 hours, then cool to room temperature, discharge Put it in a can to get high thermal conductivity silicone grease.

[0022] The various experimental data of the prepared high thermal conductivity silicone grease are shown in the following table:

[0023] technical parameter Example 1 Thermal conductivity (W / m·K) 5.13 Temperature range (°C) -50～300 Oil separation (%, 250℃ / 24h) 0.082 Volatility (%, 250℃ / 24h) 0.068

Embodiment 2

[0025] Add 32g of cerium oxide, 25g of antioxidant 1010, 0.5g of graphene LN-4N, 280g of 100CPS high temperature resistant simethicone oil into the container, ultrasonically disperse evenly (0.5h~1h), then put it into the planetary mixer and add 2062.5g Alumina GD-S404Z, stirred and heated to 120°C, then added the remaining 2062.5g of alumina GD-S404Z, stirred and evacuated for 3 to 4 hours, then cooled to room temperature, discharged and filled into tanks to obtain high thermal conductivity silicone grease.

[0026] The various experimental data of the prepared high thermal conductivity silicone grease are shown in the following table:

[0027] technical parameter Example 2 Thermal conductivity (W / m·K) 5.04 Temperature range (°C) -50～300 Oil separation (%, 250℃ / 24h) 0.014 Volatility (%, 250℃ / 24h) 0.047

Embodiment 3

[0029] Add 42g of cerium oxide, 32g of antioxidant 1010, 0.2g of graphene LN-2P, 0.5g of graphene LN-4N, 100g of 50CPS high temperature resistant dimethyl silicone oil, 150g of 100CPS high temperature resistant dimethyl silicone oil into the container, and ultrasonically disperse evenly ( 0.5h~1h), then put it into the planetary mixer and add 1250g alumina GD-S404Z, 850g alumina GD-S307A, stir and heat to 120°C, then add the remaining 1250g alumina GD-S404Z, 850g alumina GD -S307A, stir and vacuumize for 3~4 hours, then cool to room temperature, discharge the material and fill it into a tank to obtain high thermal conductivity silicone grease.

[0030] The various experimental data of the prepared high thermal conductivity silicone grease are shown in the following table:

[0031] technical parameter Example 3 Thermal conductivity (W / m·K) 5.02 Temperature range (°C) -50～300 Oil separation (%, 250℃ / 24h) 0.045 Volatility (%, 250℃ / 24h) 0.056 ...

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PUM

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Abstract

The invention discloses silicone grease with high thermal conductivity and a preparation method of the silicone grease. The silicone grease with high thermal conductivity is prepared from components in percentage by weight as follows: 5%-12% of high-temperature-resistant dimethicone, 85%-95% of heat conducting filler, 0.1%-2% of a heat-resistant additive, 0.1%-1% of an antioxidant and 0.005%-0.01%of graphene; measured cerium oxide, the antioxidant, graphene and high-temperature-resistant dimethicone are added to a container, ultrasonically and uniformly dispersed and added to a planetary mixer, part of the heat conducting filler is added, the mixture is stirred and heated, then the remaining heat conducting filler is added, the mixture is stirred, vacuumized, cooled to room temperature and discharged to be canned, and the silicone grease with high thermal conductivity is prepared. With the adoption of the scheme, the silicone grease not only has high thermal conductivity coefficient,but also has excellent electrical insulation property and long-term high temperature resistance; besides, equipment for preparing the silicone grease is simple, the cost is low, and the preparation process is simple.

Description

technical field [0001] The invention relates to the field of thermally conductive materials, in particular to a high thermally conductive silicone grease and a preparation method thereof. Background technique [0002] Thermally conductive silicone grease, referred to as "silicon grease", commonly known as "thermally conductive paste" or "heat dissipating paste", is a high-efficiency heat dissipation product in the form of a paste. The material can maintain the state of grease during use for a long time at a temperature of -50 to +250°C. At present, some people use a small amount of metal powder with high thermal conductivity as a reinforcement and fill it in thermally conductive silicone grease with high insulation performance. Although the thermal conductivity has been improved to a certain extent, the addition of metal powder will reduce the insulation performance of thermally conductive silicone grease. It cannot be used in products with high insulation performance requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K13/02C08K3/22C08K3/04
Inventor 吴琳玲
Owner WUXI HITXINCHENG POLYMER TECH