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High-strength heat-conducting silica gel gasket and preparation method thereof

A thermally conductive silica gel, high-strength technology, used in chemical instruments and methods, heat exchange materials, dyed organosilicon compound treatment, etc. Insufficient and other problems, to achieve the effect of being suitable for large-scale industrial production, good heat soaking function, and improving stretching and tearing

Active Publication Date: 2019-08-23
中科热科技江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method of adding carbon fiber materials by ordinary blending can improve the thermal conductivity of the thermal pad, but due to the disorderly arrangement of carbon fiber materials, the improvement of thermal conductivity and pad strength performance is limited
At present, pre-woven carbon fiber cloth or carbon fiber layer is used as an interlayer material to combine with thermal pads, which has the disadvantages of large contact thermal resistance between carbon fiber cloth or carbon fiber layer and gasket silicone polymer, insufficient bonding strength, and high defective rate of finished products

Method used

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  • High-strength heat-conducting silica gel gasket and preparation method thereof

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Embodiment 1

[0042] The components used in the preparation process of the high-strength thermally conductive silicone gasket product of the present invention are as follows: (A) 20 parts by weight of methyl vinyl silicone oil, with a viscosity of 400mPa·s; (B) 6 parts by weight of hydrogen-containing silicone oil, containing hydrogen 0.1%; (C) 4 parts by weight of γ-(2,3-glycidyloxy) propyltrimethoxysilane coupling agent; (D) 1.5 parts by weight of platinum catalyst; (E) spherical thermally conductive alumina powder 300 parts by weight of filler, particle size 50 μm, 200 parts by weight of irregular zinc oxide powder, particle size 4 μm; (F) 200 parts by weight of n-hexane; (G) 80 parts by weight of carbon fiber material, monofilament diameter 6 μm, length 70 μm; (H) 3 parts by weight of ethynylcyclohexanol. The preparation process includes the following steps: (1) heating and drying the (E) at 120 degrees under a vacuum environment for 1 to 2 hours, and removing excess moisture by heating...

Embodiment 2

[0044] The components used in the preparation process of the high-strength thermally conductive silicone gasket product of the present invention are as follows: (A) 25 parts by weight of methyl vinyl silicone oil, with a viscosity of 1000mPa·s; (B) 4 parts by weight of hydrogen-containing silicone oil, containing hydrogen 0.15%; (C) 4 parts by weight of vinyltrimethoxysilane coupling agent; (D) 1.5 parts by weight of catalyst; (E) 350 parts by weight of spherical heat-conducting alumina powder filler, particle size 70 μm, irregular zinc oxide 150 parts of powder with a particle size of 5 μm; (F) 230 parts by weight of n-hexane; (G) 80 parts by weight of carbon fiber material with a diameter of 15 μm and a length of 500 μm; (H) 3 parts by weight of ethynyl cyclohexanol. The preparation process includes the following steps: (1) heating and drying the (E) at 120 degrees under a vacuum environment for 1 to 2 hours, and removing excess moisture by heating; (2) drying the (A) to (E),...

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Abstract

The invention discloses a high-strength heat-conducting silica gel gasket and a preparation method thereof, and the high-strength heat-conducting silica gel gasket is suitable for the fields of heat dissipation of new energy lithium batteries and the like. A carbon fiber powder material is wetted and dispersed and surface modified by adopting an organic volatilizable dilution solvent and a coupling agent. A carbon fiber dispersion liquid is brushed on the upper surface of a substrate gasket. With the volatilization of the organic dilution solvent, carbon fibers can be arranged parallel to theplane of the heat-conducting gasket, so that the high heat-conducting performance of the carbon fiber material along the fiber axial direction is exerted, and the gasket has a good heat equalizing function in the plane direction of the gasket. The directionally arranged carbon fiber material can play a role similar to skeleton strengthening and greatly improve the etching and tearing and other mechanical properties of the gasket. In the high-temperature vulcanization process, the coupling agent which contains unsaturated groups and is bonded on the surface of the carbon fibers by chemical bonds can generate crosslinking reaction with hydrogen-containing silicone oil and vinyl on the surface of the gasket, thereby realizing firm connection between the carbon fiber material layer and the gasket and facilitating subsequent calendaring processing.

Description

technical field [0001] The invention belongs to the field of thermal interface materials, and relates to a thermally conductive silicone gasket, in particular to a high-strength thermally conductive silicone gasket and a preparation method thereof, which can be widely used in the fields of lithium battery heat dissipation and the like. Background technique [0002] In the field of new energy vehicles, a large amount of waste heat will be generated when the lithium battery pack is working. If it cannot be dissipated in time, the life of the lithium battery pack will be shortened, and in severe cases, it will even lead to explosion or combustion. Therefore, the thermal management of the power battery pack is extremely important. important. The thermal conductive silicone gasket plays a key role in the heat dissipation technology of new energy vehicle lithium battery, which can effectively conduct the heat generated by the battery to the liquid cooling plate, while ensuring the...

Claims

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Application Information

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IPC IPC(8): C09K5/14C09C1/44C09C3/12C09C3/10C09C3/06H01M10/613H01M10/625H01M10/0525B60L58/26H05K7/20
CPCB60L58/26C09C1/44C09C3/006C09C3/06C09C3/10C09C3/12C09K5/14H01M10/0525H05K7/20H01M10/613H01M10/625Y02E60/10Y02T10/70
Inventor 刘斌淮秀兰周敬之李勋锋胡玄烨
Owner 中科热科技江苏有限公司
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