US 12,252,600 B2
Inorganic particle dispersion resin composition and manufacturing method of inorganic particle dispersion resin composition
Hajime Yukutake, Yokohama (JP); Yuki Otsuka, Yokohama (JP); Naoki Minorikawa, Yokohama (JP); Hidetoshi Okamoto, Yokohama (JP); and Toshihiro Arai, Yokohama (JP)
Assigned to Resonac Corporation, Tokyo (JP)
Appl. No. 17/434,578
Filed by SHOWA DENKO K.K., Tokyo (JP)
PCT Filed Jul. 30, 2020, PCT No. PCT/JP2020/029354
§ 371(c)(1), (2) Date Aug. 27, 2021,
PCT Pub. No. WO2021/020540, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 2019-142530 (JP), filed on Aug. 1, 2019.
Prior Publication US 2022/0119619 A1, Apr. 21, 2022
Int. Cl. C08K 3/22 (2006.01); C08K 3/28 (2006.01); C08K 9/06 (2006.01); C08L 83/04 (2006.01)
CPC C08K 3/22 (2013.01) [C08K 3/28 (2013.01); C08K 9/06 (2013.01); C08L 83/04 (2013.01); C08K 2003/2227 (2013.01); C08K 2003/282 (2013.01); C08K 2201/001 (2013.01); C08L 2203/20 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A manufacturing method of an inorganic particle dispersion resin composition, the inorganic particle dispersion resin composition, containing:
a resin; and
inorganic particles,
wherein the inorganic particles include silica-covered aluminum nitride particles and alumina particles, and
the silica-covered aluminum nitride particles include aluminum nitride particles and a silica film covering surfaces of the aluminum nitride particles,
the method comprising:
a particle manufacturing step of manufacturing the silica-covered aluminum nitride particles; and
a mixing step of mixing the inorganic particles including the silica-covered aluminum nitride particles obtained in the particle manufacturing step and the alumina particles with the resin,
wherein the particle manufacturing step includes a first step of covering the surfaces of the aluminum nitride particles with an organic silicone compound having a structure represented by Formula (1) described below, and
a second step of heating the aluminum nitride particles covered with the organic silicone compound at a temperature of higher than or equal to 300° C. and lower than or equal to 800° C.,
wherein the organic silicone compound comprises at least one of a compound represented by Formula (2) described below or a compound represented by Formula (3) described below,

OG Complex Work Unit Chemistry
in Formula (1), R is an alkyl group having carbon atoms of less than or equal to 4,

OG Complex Work Unit Chemistry
in Formula (2), R1 and R2 are each independently a hydrogen atom or a methyl group, at least one of R1 and R2 is a hydrogen atom, and m is an integer of 0 to 10, and

OG Complex Work Unit Chemistry
in Formula (3), n is an integer of 3 to 6, and
in the inorganic particle dispersion resin composition, a content of the alumina particles in the inorganic particles is greater than or equal to 57.0 volume % and less than or equal to 80 volume %.