Heat conduction silicon rubber composite material, heat conduction silicon sheet and preparation method of heat conduction silicon sheet

A technology of thermally conductive silicone rubber and composite materials, which is applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., and can solve problems such as limiting the application of thermally conductive sheets, failure to composite, and decreased thermal conductivity of materials

Active Publication Date: 2014-03-26
ZHEJIANG SAINTYEAR ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional heat-conducting silicone rubber sheet adopts the addition-type silicone rubber manufacturing technology, and the properties of the two surfaces of the finished product are the same, which cannot meet the needs of special applications, such as the needs of different viscosities on the two surfaces; and it is different from other types of adhesives. The adhesive is not sufficiently bonded to effectively compound with it, which limits the application of thermal conductive sheets
In order to improve the bonding ability of the thermally conductive silicone rubber sheet and make it adaptable to the needs of special occasions, the prior art discloses a method of modifying the surface of the thermally conductive silicone rubber material by thermal curing of the coating, but this treatment technology It will cause a decrease in the thermal conductivity of the material

Method used

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  • Heat conduction silicon rubber composite material, heat conduction silicon sheet and preparation method of heat conduction silicon sheet
  • Heat conduction silicon rubber composite material, heat conduction silicon sheet and preparation method of heat conduction silicon sheet
  • Heat conduction silicon rubber composite material, heat conduction silicon sheet and preparation method of heat conduction silicon sheet

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preparation example Construction

[0056] The present invention has no special limitation on the preparation method of the thermally conductive silicone rubber composite material, and the preparation method of the composition well known to those skilled in the art can be used. In the present invention, the components described in the above technical solution are mixed to obtain a thermally conductive silicone rubber composite material, which is preferably prepared according to the following method:

[0057] Mixing the thermally conductive powder described in the above technical solution with a silane coupling agent to obtain a modified thermally conductive powder;

[0058] Mixing the resin, ethylene glycol diacrylate and photoinitiator described in the above technical solution to obtain photocurable glue;

[0059] Mix the modified heat-conducting powder, the light-curing glue, the methyl vinyl silica gel, organic silicone oil, and platinum catalyst described in the above technical solution to obtain a heat-cond...

Embodiment 1

[0078] Using a high-speed mixer, 25 parts by weight of aluminum powder with a particle size of 1 μm, 25 parts by weight of aluminum oxide with a particle size of 0.1 μm, and 0.5 parts by weight of γ-methacryloxypropyltrimethoxysilane were uniformly mixed to obtain Modified thermal conductive powder;

[0079] Mix 50 parts by weight of urethane acrylate, 30 parts by weight of ethylene glycol diacrylate and 5 parts by weight of trimethylbenzyl diphenylphosphine oxide to obtain a photocurable adhesive;

[0080] 5 parts by weight of methyl vinyl silicone rubber, 5 parts by weight of vinyl silicone oil, 1 part by weight of hydrogen-containing silicone oil, 19 parts by weight of dimethyl silicone oil, 0.01 parts by weight of platinum catalyst and 17 parts by weight of light curing The glue and the obtained modified heat-conducting powder were put into the mixer and mixed for 40 minutes, then vacuumed and degassed to obtain the degassed glue;

[0081] The obtained rubber material was...

Embodiment 2

[0085] Using a high-speed mixer, 50 parts by weight of aluminum powder with a particle size of 2.5 μm, 50 parts by weight of aluminum oxide with a particle size of 5 μm, 100 parts by weight of zinc nitride with a particle size of 44 μm, and 1 part by weight of γ-methacryloyl Oxypropyltrimethoxysilane is mixed evenly to obtain a modified thermally conductive powder;

[0086] Mix 60 parts by weight of urethane acrylate, 40 parts by weight of ethylene glycol diacrylate and 15 parts by weight of trimethylbenzyl diphenylphosphine oxide to obtain a photocurable adhesive;

[0087] 30 parts by weight of methyl vinyl silicone rubber raw rubber, 2 parts by weight of vinyl silicone oil, 1 part by weight of hydrogen-containing silicone oil, 20 parts by weight of dimethyl silicone oil, 15 parts by weight of photocurable adhesive, 0.08 parts by weight The platinum catalyst and the obtained modified heat-conducting powder were put into a mixer and mixed for 45 minutes, then vacuumed and dega...

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Abstract

The invention provides a heat conduction silicon rubber composite material, a heat conduction silicon sheet and a preparation method of the heat conduction silicon sheet. The heat conduction silicon rubber composite material comprises the following components in parts by weight: 5-40 parts of methyl vinyl silicon rubber, 15-50 parts of organic silicon oil, 0.5-2 parts of silane coupling agent, 0.01-0.1 part of platinum catalyst, 10-20 parts of photo-curing adhesive and 50-400 parts of heat conduction powder. The heat conduction silicon rubber composite material comprises the photo-curing adhesive. After the heat conduction silicon rubber composite material provided by the invention is prepared into a heat conduction silicon sheet semi-finished product, the viscosities of the two surfaces of the obtained heat conduction silicon sheet are different due to difference of the ultraviolet irradiation time of the upper and lower surfaces of the heat conduction silicon sheet and the heat conduction silicon sheet with different surface attributes is obtained, so that the heat conduction silicon sheet provided by the invention can meet various special requirements and is beneficial to application.

Description

technical field [0001] The invention relates to the technical field of heat-conducting gaskets, in particular to a heat-conducting silicone rubber composite material, a heat-conducting silica gel sheet and a preparation method thereof. Background technique [0002] With the development of integration technology, microelectronic packaging technology and high-power LED technology, electronic components and electronic equipment are developing towards miniaturization and miniaturization, and the heat generated by electronic equipment is rapidly accumulating and increasing. In order to ensure that electronic components can work normally with high reliability at the ambient temperature, it is necessary to develop thermally conductive and insulating composite materials to replace traditional polymer materials as thermal interface materials and packaging materials, so as to quickly transfer the heat of heating elements to heat dissipation equipment and protect electronic components. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08L83/05C08K3/22C08K3/08C08K3/28C08K3/38C08J3/28C08J3/24C09J175/14C09J4/02
Inventor 张宇强田海玉许建明高坚生
Owner ZHEJIANG SAINTYEAR ELECTRONICS TECH
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