Title:
SPHERICAL ALUMINA PARTICLES, METHOD FOR PRODUCING SAME, AND RESIN COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2022/163505
Kind Code:
A1
Abstract:
Provided are spherical alumina particles which, when mixed with a resin, produce a resin composition that exhibits a low dielectric loss tangent. These spherical alumina particles contain at least 90 mass% of an α-alumina crystal phase; have a half-width of the α-alumina (113) peak of 0.124° or less when observed by X-ray diffraction; and have an average particle diameter of 0.5 to 40 μｍ.
Inventors:
OKABE TAKUTO (JP)
FUKAZAWA MOTOHARU (JP)
FUKAZAWA MOTOHARU (JP)
Application Number:
PCT/JP2022/002097
Publication Date:
August 04, 2022
Filing Date:
January 21, 2022
Export Citation:
Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C01F7/021; C08K3/22; C08K9/00; C08L9/00; C08L25/02; C08L71/12; C08L101/00
Domestic Patent References:
| WO2008053536A1 | 2008-05-08 | |||
| WO2016114287A1 | 2016-07-21 | |||
| WO2016175325A1 | 2016-11-03 | |||
| WO2016175326A1 | 2016-11-03 |
Foreign References:
| JP2014009140A | 2014-01-20 | |||
| JP2012241029A | 2012-12-10 | |||
| JP4361997B2 | 2009-11-11 | |||
| JP6603777A | 1977-06-02 | |||
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| JP2017057352A | 2017-03-23 |
Other References:
MASANAO KAWABE ET AL., JOURNAL OF THE JAPAN INSTITUTE OF ELECTRONICS PACKAGING, vol. 12, no. 2, 2009, pages 125
Attorney, Agent or Firm:
YAMAMOTO, Osamu et al. (JP)
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