Low-density high-strength heat-conducting gasket and preparation method thereof

A heat-conducting gasket, high-strength technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of increased battery weight, no obvious loss of mechanical properties, and restrictions on the wide application of electric vehicles, so as to improve thermal conductivity , excellent thermal conductivity and low density, the effect of small density

Inactive Publication Date: 2019-04-02
SHENZHEN DARBOND INTERFACE MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The heat generated by the battery pack in the new energy vehicle is exported through the thermal pad, so the density of the thermal pad used is required to reach 2.0g/cm 3 Below, and the mechanical properties cannot be significantly lost, but with the use of a large number of functional fillers such as thermal conductivity and mechanical stre

Method used

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  • Low-density high-strength heat-conducting gasket and preparation method thereof

Examples

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preparation example Construction

[0027] The preparation method of oleic acid-modified aluminum hydroxide in Examples 1 to 5 is:

[0028] Add 1000g of aluminum hydroxide to the stirring tank, and the stirring speed is 15-20rpm. After atomizing the oleic acid, spray it from the upper part of the stirring tank into the stirring tank. The spraying speed is controlled at 0.10-0.13g / min, and the spraying time is 30- 40min, then raise the temperature to 50~60℃, keep the temperature for 1.5~2 hours, cool to room temperature and discharge. The obtained powder is oleic acid-modified aluminum hydroxide.

Embodiment 1

[0030] A low-density and high-strength thermally conductive gasket, by weight, comprises the following components:

[0031] 100g of methyl silicone oil with a viscosity of 450mPa˙s, 10g of vinyl terminated silicone oil with a viscosity of 200mPa˙s and a vinyl content of 0.2wt%, 10g of vinyl silicone oil with a viscosity of 50000mPa˙s and a vinyl content of 0.3wt%, active hydrogen 5g methyl hydrogen-containing silicone oil with a content of 0.3wt%, 2g platinum catalyst, coupling agent γ-glycidyl ether oxypropyltrimethoxysilane KH-5603g, oleic acid modified aluminum hydroxide 600g, particle size 8~ 60 g of 15 μm alumina and 5 g of hydrogenated castor oil with a melting point of 85 to 88°C.

Embodiment 2

[0033] A low-density and high-strength thermally conductive gasket, by weight, comprises the following components:

[0034] 100g methyl silicone oil with a viscosity of 550mPa˙s, 20g vinyl terminated silicone oil with a viscosity of 100mPa˙s and a vinyl content of 0.3wt%, 15g of vinyl silicone oil with a viscosity of 100000mPa˙s and a vinyl content of 0.1wt%, active hydrogen Hydroxy-hydrogen silicone oil with a content of 0.5wt% 8g, platinum catalyst 5g, coupling agent methacryloyloxy functional group silane KH-5705g, oleic acid modified aluminum hydroxide 700g, particle size 15-30μm alumina 75g , 7 g of hydrogenated castor oil with a melting point of 85-88°C.

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Abstract

The invention relates to a low-density high-strength heat-conducting gasket and a preparation method thereof. The low-density high-strength heat-conducting gasket comprises the following components inparts by weight: 100 parts of methyl silicone oil, 10-20 parts of low-viscosity vinyl silicone oil, 10-20 parts of high-viscosity vinyl silicone oil, 5-10 parts of hydrogen-containing silicone oil, 2-5 parts of a platinum catalyst, 3-8 parts of a coupling agent, 600-800 parts of oleic acid modified aluminum hydroxide, 60-90 parts of aluminum oxide and 5-10 parts of hydrogenated castor oil. The aluminum hydroxide subjected to surface modification through oleic acid is used in the preparation method, and the aluminum hydroxide subjected to surface modification through oleic acid can be used forheat-conducting filler in a large scale; under the action of the coupling agent, the system has relatively high strength after being solidified; the heat conduction coefficient of the heat-conductinggasket can reach 2.0 w/m.K, the density is 1.98 g/cm<3>, and the tensile fracture strength reaches 0.3 MPa; and therefore the heat-conducting gasket can be applied to the field of new-energy automobiles.

Description

technical field [0001] The invention relates to a thermally conductive gasket and a preparation method thereof, in particular to a low-density and high-strength thermally conductive gasket and a preparation method thereof, belonging to the technical field of new energy. Background technique [0002] In recent years, due to the advantages of no pollution, low noise, high energy efficiency, diversification, simple structure, and convenient maintenance, new energy vehicles such as electric vehicles will become a new trend in the development of the automotive industry in the future. In particular, my country's electric vehicles have initially entered the stage of industrialization from the stage of research and development after a ten-year journey. Among them, the heat conduction of the battery is a key difficulty and an important key technology in the application of new energy vehicles. As we all know, reducing the weight of the car can effectively reduce the emission of the c...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08L91/00C08K13/06C08K9/04C08K3/22C09K5/14
CPCC08K2003/2227C08K2201/003C08K2201/014C08L83/04C08L2205/025C08L2205/035C09K5/14C08L91/00C08K13/06C08K9/04C08K3/22
Inventor 万炜涛王红玉陈田安
Owner SHENZHEN DARBOND INTERFACE MATERIALS
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