公开(公告)号：US20230312868A1

公开(公告)日：2023-10-05

申请号：US18022648

申请日：2021-08-17

Applicant: DENKA COMPANY LIMITED

Inventor： Yasuaki HATAYAMA ,  Takashi FUKUDA ,  Atsuya SUGIMOTO

IPC: C08K3/36 ,  C01B33/18 ,  C09K3/10

CPC classification number: C08K3/36 ,  C01B33/18 ,  C09K3/1025 ,  C08K2201/003 ,  C08K2201/006 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/51 ,  C01P2002/02 ,  C01P2006/12 ,  C01P2006/80 ,  C09K2200/0647 ,  C09K2200/0247

Abstract: An amorphous silica powder that is suitable for obtaining a liquid sealant that exhibits superior filling properties and preservation properties, and a resin composition obtained by using the amorphous silica powder as a filler. More specifically, an amorphous silica powder is prepared so as to have a modal diameter within the range of 1 to 10 μm and a frequency of particles having particle diameters of less than 0.50 μm of 1.0% or more in the particle diameter frequency distribution and have a specific surface area of 1 to 12 m2/g.

公开(公告)号：US20240190639A1

公开(公告)日：2024-06-13

申请号：US18279409

申请日：2022-03-11

Applicant: DENKA COMPANY LIMITED

Inventor： Hiroyuki SHIOTSUKI ,  Teruhiro AIKYO ,  Takashi FUKUDA

IPC: B65D81/24 ,  B65B31/00 ,  B65D81/20 ,  C01B33/18 ,  C01F5/02 ,  C09C1/02 ,  C09C1/30 ,  C09C3/12

CPC classification number: B65D81/24 ,  B65B31/00 ,  B65D81/2084 ,  C01B33/18 ,  C01F5/02 ,  C09C1/028 ,  C09C1/3081 ,  C09C3/12

Abstract: A method for producing a packaging body of the present invention includes a production step of producing a metal oxide powder, and a sealing step of placing the metal oxide powder in a bag that is filled with at least one gas selected from the group consisting of a noble gas, nitrogen gas, oxygen gas, and dry air, followed by sealing the bag, the metal oxide powder being a silica powder or a magnesia powder, the bag having a moisture permeability as measured according to JIS Z 0222-1959 of 0.30 g/(m2·day) or less.

公开(公告)号：US20240166552A1

公开(公告)日：2024-05-23

申请号：US18284784

申请日：2022-03-23

Applicant: DENKA COMPANY LIMITED

Inventor： Yasuaki HATAYAMA ,  Takashi FUKUDA

IPC: C03C12/00 ,  C03B19/10 ,  C03C3/06 ,  H01L23/29

CPC classification number: C03C12/00 ,  C03B19/1005 ,  C03B19/1095 ,  C03C3/06 ,  C03C2201/02 ,  C03C2201/80 ,  C03C2203/10 ,  H01L23/29

Abstract: A spherical inorganic oxide powder wherein a volume-based cumulative 50% diameter D50 is 4-55 μm; and in a cross-section of a cured body containing an epoxy resin and the spherical inorganic oxide powder at a mass ratio of 2:1, when a total of 5000 particles with a maximum diameter of 51 μm or larger are observed in a field of view at 100× magnification using a scanning electron microscope, a total number of air bubbles having a maximum diameter of 1 μm or larger and smaller than 10 μm is 40 or fewer and a total number of air bubbles having a maximum diameter of 10 μm or larger is 30 or fewer.

公开(公告)号：US20240158609A1

公开(公告)日：2024-05-16

申请号：US18284804

申请日：2022-03-24

Applicant: DENKA COMPANY LIMITED

Inventor： Takaaki MINAMIKAWA ,  Akihiko YAMAMOTO ,  Takashi FUKUDA

IPC: C08K3/36 ,  C01B33/12

CPC classification number: C08K3/36 ,  C01B33/12 ,  C08K2201/003 ,  C08K2201/006

Abstract: An inorganic powder having a volume-based cumulative 50% diameter D50 of 1.2-2.8 μm, having a volume-based particle size frequency distribution that includes at least a first peak and a second peak located on a larger-particle-diameter side of the first peak, wherein the first peak has a half-width smaller than 0.5 μm.

公开(公告)号：US20230312356A1

公开(公告)日：2023-10-05

申请号：US18022569

申请日：2021-08-17

Applicant: DENKA COMPANY LIMITED

Inventor： Yasuaki HATAYAMA ,  Takashi FUKUDA ,  Atsuya SUGIMOTO

IPC: C01B33/18

CPC classification number: C01B33/18 ,  C01P2004/64 ,  C01P2006/12

Abstract: An amorphous silica powder that is suitable for obtaining a solid sealant that exhibits superior fluidity and filling properties, and a resin composition obtained by using the amorphous silica powder as a filler. An amorphous silica powder is prepared so as to have a modal diameter within the range of 1 to 10 μm in the particle diameter frequency distribution and have a frequency of particles having particle diameters of 0.50 to 1.83 μm of less than 3.0% in the particle diameter frequency distribution.

公开(公告)号：US20240174520A1

公开(公告)日：2024-05-30

申请号：US18284796

申请日：2022-03-24

Applicant: DENKA COMPANY LIMITED

Inventor： Takaaki MINAMIKAWA ,  Akihiko YAMAMOTO ,  Takashi FUKUDA

IPC: C01B33/18 ,  C08K3/36 ,  H01L21/56 ,  H01L23/29

CPC classification number: C01B33/18 ,  C08K3/36 ,  H01L23/295 ,  C01P2004/32 ,  C01P2004/51 ,  C01P2004/62 ,  C01P2006/80 ,  H01L21/565

Abstract: A spherical inorganic powder having, in a particle size frequency distribution, a first peak having a local maximum value in a particle size region from 0.1 μm or larger to 0.6 μm or smaller, and a second peak having a local maximum value in a particle size region from 1.5 μm or larger to 5.0 μm or smaller, wherein a value of a ratio of a frequency at the local maximum value of the second peak to a frequency at the local maximum value of the first peak is 1.5 or higher and lower than 10.0.