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Electromagnetic wave-absorbing heat-conducting sheet and method for producing electromagnetic-wave-absorbing heat-conducting sheet

A heat-conducting sheet and absorbent technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of poor softness and slowness of the sheet, and achieve the effect of good softness

Active Publication Date: 2016-07-06
DEXERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, if the coupling agent for the purpose of modifying the surface of the powder is added too much, the reaction will slowly proceed in the unreacted part as time goes by, and after a long time, it will become a part of the silicone molded product sheet. softness will be reduced

Method used

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  • Electromagnetic wave-absorbing heat-conducting sheet and method for producing electromagnetic-wave-absorbing heat-conducting sheet
  • Electromagnetic wave-absorbing heat-conducting sheet and method for producing electromagnetic-wave-absorbing heat-conducting sheet
  • Electromagnetic wave-absorbing heat-conducting sheet and method for producing electromagnetic-wave-absorbing heat-conducting sheet

Examples

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Effect test

Embodiment 1）

[0080] In Example 1, an organopolysiloxane containing only alkenyl groups at both ends of the molecular chain, a methylhydrogenpolysiloxane having only hydrogen atoms directly bonded to silicon atoms in the side chain, and an organopolysiloxane containing less than 1% of The polysiloxane mixture of the platinum group addition reaction catalyst; the magnetic metal powder; and the silane coupling agent are mixed and stirred with a vacuum dryer.

[0081] Spherical amorphous metal powder was blended so that the volume ratio was 70 vol % with respect to the total amount of the composition. As the magnetic metal powder, Fe—Si—B-based spherical amorphous metal powder with an average particle diameter of 25 μm was used. As a silane coupling agent, 0.06 wt% of 3-methacryloxypropyltrimethoxysilane was used with respect to the weight of the spherical amorphous metal powder.

[0082] Next, the stirred mixture was molded into a sheet shape of 2 mm, and cured in an environment at 100° C. f...

Embodiment 2）

[0084] In Example 2, except having used 3-methacryloxypropyltriethoxysilane as a silane coupling agent, the electromagnetic wave absorptive heat conductive sheet was produced on the conditions similar to Example 1.

Embodiment 3）

[0086] In Example 3, except having used n-decyltrimethoxysilane as a silane coupling agent, the electromagnetic wave absorptive heat conductive sheet was produced on the conditions similar to Example 1.

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Abstract

An EM-absorbing / heat-conducting sheet with good flexibility is provided. Said sheet contains silicone rubber, a coupling agent, and a magnetic metal powder surface-treated by the coupling agent, said magnetic metal powder constituting 50-80% of the sheet by volume. The coupling agent has a C10-18 long-chain alkyl group as an organic functional group. By weight, the sheet contains 0.5-5 times the amount of the coupling agent necessary to form a monolayer thereof on the surface of the magnetic metal powder.

Description

technical field [0001] The present invention relates to an electromagnetic wave absorptive heat conduction sheet having good thermal conductivity and electromagnetic wave suppression properties, and a method for producing the electromagnetic wave absorptive heat conduction sheet. [0002] This application claims priority on the basis of Japanese Patent Application No. 2010-185890 for which it applied in Japan on August 23, 2010, By referring this application, it is used for this application. Background technique [0003] In recent years, there has been a trend towards miniaturization of electronic equipment. On the other hand, due to the diversity of applications, the power consumption cannot change accordingly. Therefore, more attention has been paid to the heat dissipation measures in the equipment. [0004] As heat radiation countermeasures in the above-mentioned electronic equipment, heat sinks, heat pipes, or heat sinks made of metal materials with high thermal conducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00C08K5/541C08K9/06C08L83/04H01F1/00H01F1/153H01F1/26
CPCH05K9/0083C08G77/12C08G77/20C08K3/02C08K3/08C08K5/5419C08K9/06C08K2003/023C08K2003/0856C08K2201/01H01F1/15375H01F1/26
Inventor 久村达雄久保佑介
Owner DEXERIALS CORP