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Silicon rubber thermally conductive material and preparation method thereof

A thermal conductive material and silicone rubber technology, applied in the field of silicone rubber thermal conductive materials and their preparation, can solve the problems of low polymer crystallinity, poor thermal conductivity, and difficulty in meeting high heat dissipation, and achieve the effect of superior thermal conductivity.

Pending Publication Date: 2019-12-20
SHANGHAI ALLIED PLASTIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, thermal interface materials are mainly made of polymer materials, but the crystallinity of polymers is generally low, and the vibration of molecular chains can scatter phonons. These factors make the thermal conductivity of polymer materials generally poor. Poor, difficult to meet high heat dissipation requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0063] The second aspect of the present invention provides a method for preparing the thermal interface material, comprising the following steps:

[0064] S1: Add silane coupling agent, metal filler, and metal compound filler to 100-300 parts by weight of isopropanol in sequence, react at 60-100 degrees Celsius for 1-3 hours, and filter to obtain a mixed filler;

[0065] S2: When the temperature of the internal mixer rises to 30-50°C, first put the silicone rubber into the internal mixing chamber, adjust the speed of the internal mixer to 30-50r / min, add the mixed filler and carbon fiber in turn to obtain the rubber compound; Add 0.3-0.5 parts by weight of vulcanizing agent to the rubber material, vulcanize on a vulcanizing machine, the vulcanization temperature is 180-200°C, and the time is 10-20min.

[0066] The vulcanizing agent in the step S2 is not particularly limited. In the present application, the vulcanizing agent is 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane.

[...

Embodiment 1

[0073] A silicone rubber heat-conducting material, comprising the following components in parts by weight: 15.3 parts of silicone rubber, 32.6 parts of metal filler, 24.2 parts of metal compound filler, 28.4 parts of carbon fiber, and 0.42 part of a silane coupling agent.

[0074] The silicone rubber is methyl vinyl silicone rubber, the molecular weight of the methyl vinyl silicone rubber is 620,000, and the vinyl content is 0.17mol%, purchased from Hubei Xingrui Chemical Co., Ltd.

[0075] The metal filler includes spherical structure aluminum powder and flake aluminum powder, the weight ratio of the spherical structure aluminum powder and flake aluminum powder is 0.4:1, the average particle size of the spherical structure aluminum powder is 30 microns, the The median diameter D50 of the flaky aluminum powder is 15 microns, purchased from Angang Industrial Fine Aluminum Powder Co., Ltd.

[0076] The metal compound filler includes zinc oxide and aluminum oxide; the weight rati...

Embodiment 2

[0083] A silicone rubber heat-conducting material, comprising the following components in parts by weight: 14 parts of silicone rubber, 31 parts of metal filler, 21 parts of metal compound filler, 26 parts of carbon fiber, and 0.3 part of a silane coupling agent.

[0084] The silicone rubber is methyl vinyl silicone rubber, the molecular weight of the methyl vinyl silicone rubber is 620,000, and the vinyl content is 0.17mol%, purchased from Hubei Xingrui Chemical Co., Ltd.

[0085] The metal filler includes spherical structure aluminum powder and flake aluminum powder, the weight ratio of the spherical structure aluminum powder and flake aluminum powder is 0.3:1, the average particle diameter of the spherical structure aluminum powder is 30 microns, the The median diameter D50 of the flaky aluminum powder is 15 microns, purchased from Angang Industrial Fine Aluminum Powder Co., Ltd.

[0086] The metal compound filler includes zinc oxide and aluminum oxide; the weight ratio of ...

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Abstract

The invention belongs to the technical field of thermally conductive materials, and particularly relates to a silicon rubber-based thermally conductive material and a preparation method thereof. The silicone rubber thermally conductive material disclosed in the invention includes the following components in of parts by weight: 14 to 16 parts of silicone rubber, 31 to 33 parts of a metal filler, 21to 25 parts of a metal compound filler, 26 to 29 parts of carbon fibers, and 0.3 to 0.5 part of a silane coupling agent, wherein the silicone rubber is at least one selected from the group consistingof methyl vinyl silicone rubber, methyl silicone rubber, methyl vinyl phenyl silicone rubber, and fluorosilicone rubber.

Description

technical field [0001] The invention belongs to the technical field of heat-conducting materials, and in particular relates to a silicone rubber heat-conducting material and a preparation method thereof. Background technique [0002] With the development of electronic components in the direction of miniaturization, integration, and densification, driven by high performance and high efficiency, the operating temperature rise of each component has been greatly improved compared with before. The heat accumulates and is difficult to effectively diffuse out, resulting in a serious decline in the stability, reliability and durability of electronic components, which greatly reduces the service life of electronic products. Therefore, improving the heat dissipation power of electronic products has increasingly become a key technology. In traditional electronic products, the heat sink is installed together with the electronic components, and the heat is exported through the heat sink...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K13/04C08K7/06C08K7/18C08K7/00C08K3/08C08K3/22C09K5/14
CPCC08K3/08C08K3/22C08K7/00C08K7/06C08K7/18C08K13/04C08K2003/0812C08K2003/2227C08K2003/2296C08K2201/011C09K5/14C08L83/04
Inventor 范勇程亚东张起篷
Owner SHANGHAI ALLIED PLASTIC IND
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