Title:
SPHERICAL ALUMINA POWDER, RESIN COMPOSITION, AND HEAT DISSIPATION MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/071140
Kind Code:
A1
Abstract:
Provided is a spherical alumina powder wherein, in a particle size distribution measured by a laser diffraction scattering particle size distribution measuring apparatus, a maximum particle diameter showing a maximum peak is in the range of 35-70 μm, the frequency of the maximum particle diameter is 5-15%, and the cumulative value of the frequency of each particle diameter at 20 points obtained by dividing the particle diameter range of 1-20 μm into 19 equal parts is 3-17 vol%. A resin composition X contains the spherical alumina powder and a vinyl group-containing polymethylsiloxane and contains 88.1 mass% of the spherical alumina powder, and a resin composition Y is the same as the resin composition X except that 79.3 mass% of the spherical alumina powder of the resin composition X is contained and 8.8 mass% of the spherical alumina powder for testing is contained. The ratio (VY/VX) of the viscosity VY of the resin composition Y to the viscosity VX of the resin composition X is 0.85 or more.
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Inventors:
AIKYO TERUHIRO (JP)
KAWABATA TOMOHIRO (JP)
YAMAGUCHI JUN (JP)
YAMASHITA ATSUSHI (JP)
KAWABATA TOMOHIRO (JP)
YAMAGUCHI JUN (JP)
YAMASHITA ATSUSHI (JP)
Application Number:
PCT/JP2021/035146
Publication Date:
April 07, 2022
Filing Date:
September 24, 2021
Export Citation:
Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C01F7/02; C08K3/22; C08K7/18; C08L83/07; C08L101/00
Domestic Patent References:
| WO2016017637A1 | 2016-02-04 |
Foreign References:
| JP2007070474A | 2007-03-22 | |||
| JP2004244491A | 2004-09-02 | |||
| JP2020105047A | 2020-07-09 |
Attorney, Agent or Firm:
TAGUCHI, Masahiro et al. (JP)
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