公开(公告)号：US20240228743A1

公开(公告)日：2024-07-11

申请号：US18563799

申请日：2022-05-18

Applicant: DENKA COMPANY LIMITED

Inventor： Takuto OKABE ,  Motoharu FUKAZAWA

IPC: C08K3/22 ,  C01G23/04 ,  C08K7/18 ,  C08K9/06 ,  C21D1/32

CPC classification number: C08K3/22 ,  C01G23/04 ,  C08K7/18 ,  C08K9/06 ,  C21D1/32 ,  C01P2004/32 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40 ,  C08K2003/2227 ,  C08K2003/2237 ,  C08K2201/001 ,  C08K2201/005 ,  C08K2201/006

Abstract: To provide: an inorganic oxide powder which, when filled in a resin material, can simultaneously achieve a high dielectric constant and a low dielectric dissipation factor; a method for producing the same; and a resin composition comprising the inorganic oxide powder.
Provided is an inorganic oxide powder comprising a spherical titanium oxide powder having a rutile phase, wherein the ratio of the rutile phase in the inorganic oxide powder is 90 mass % or more. Further provided is a resin composition comprising the inorganic oxide powder and at least one resin selected from a thermoplastic resin and a thermosetting resin.

公开(公告)号：US20230227658A1

公开(公告)日：2023-07-20

申请号：US17928900

申请日：2021-05-10

Applicant: DENKA COMPANY LIMITED

Inventor： Naotsugu NOGAMI ,  Motoharu FUKAZAWA ,  Takuto OKABE

IPC: C09C3/06 ,  C09C1/00 ,  C03C14/00 ,  C08K9/02

CPC classification number: C09C3/063 ,  C09C1/0081 ,  C03C14/004 ,  C08K9/02 ,  C01P2004/84 ,  C01P2002/72 ,  C01P2004/03 ,  C03C2214/05

Abstract: A method for producing a composite particle, the method containing: (a) mixing a raw material particle and at least one type of fine particles selected from SiO2 fine particles and Al2O3 fine particles, the fine paricles having a diameter smaller than that of the raw material particle; and (b) heating the mixture of the raw material particles and the fine particles, wherein the raw material particle contains three components of ZnO, Al2O3, and SiO2, and a content of the ZnO is 17 to 43% by mole, a content of the Al2O3 is 9 to 20% by mole, and a content of the SiO2 is 48 to 63% by mole, based on the total content of the three components.

公开(公告)号：US20170210886A1

公开(公告)日：2017-07-27

申请号：US15328785

申请日：2015-07-28

Applicant: DENKA COMPANY LIMITED

Inventor： Kazuyoshi IKEDA ,  Motoharu FUKAZAWA ,  Takafumi KOMAKI

IPC: C08K9/06 ,  C09K5/14 ,  C09C1/40 ,  C01F7/02 ,  C08K7/18 ,  C08K3/22

CPC classification number: C08K9/06 ,  C01F7/02 ,  C01F7/021 ,  C01P2004/32 ,  C01P2004/61 ,  C01P2004/62 ,  C08K3/22 ,  C08K7/18 ,  C08K2003/2227 ,  C08K2201/001 ,  C08K2201/003 ,  C08K2201/005 ,  C08K2201/016 ,  C08L101/00 ,  C09C1/40 ,  C09C1/407 ,  C09K5/14

Abstract: Provided is a spherical alumina powder which, when incorporated into resins in a high concentration, enables a resin composition to have low viscosity and which has reduced viscosity increase in the resin composition over time after surface treatment of the spherical alumina powder. The spherical alumina powder has an alkyl group(s) derived from a silane compound(s) on its surface, and is characterized in that an intensity ratio {I (CH3)/I (CH2)} of a peak (2960±5 cm−1) associated with asymmetric vibration of CH3 to a peak (2925±5 cm−1) associated with asymmetric vibration of CH2 in the alkyl group(s) of the silane compound(s) in the same spectral data obtained by infrared spectroscopic analysis measurement is 0.2 or more and less than 2.0.

公开(公告)号：US20240425377A1

公开(公告)日：2024-12-26

申请号：US18701772

申请日：2022-10-07

Applicant: DENKA COMPANY LIMITED

Inventor： Takuto OKABE ,  Motoharu FUKAZAWA

IPC: C01B33/18

Abstract: The present invention provides a method for producing spherical silica particles that can achieve lower dielectric dissipation factors when used to fill a resin. The present invention is a method for producing spherical silica particles (X), including a step of classifying amorphous spherical silica particles (A), followed by a step of performing a heat treatment at 800-1200° C. The classifying step preferably includes wet classification. Additionally, the classifying step preferably includes removing foreign substances from surfaces of the spherical silica particles (A). The spherical silica particles (A) are preferably amorphous spherical silica particles obtained by a powder melting method.

公开(公告)号：US20240417544A1

公开(公告)日：2024-12-19

申请号：US18701748

申请日：2022-10-07

Applicant: DENKA COMPANY LIMITED

Inventor： Takuto OKABE ,  Motoharu FUKAZAWA ,  Tsuyoshi KANEKO ,  Takako EBISUZAKI

IPC: C08K9/06 ,  C09C1/30

Abstract: Provided are spherical silica particles that can achieve a lower dielectric dissipation factor when used to fill a resin, and a resin composition using the same. The spherical silica particles (X) are those in which the number of water molecules desorbed from the spherical silica particles (X) when the spherical silica particles (X) are heated from 50° C. to 1000° C. at a rate of temperature increase of 25° C./min. is 0.001-0.010 mmoL/g and in which the specific surface area is 0.1-2.0 m2/g. The resin composition contains the silica particles (X) and at least one resin selected from a thermoplastic resin and a thermosetting resin.

公开(公告)号：US20240343636A1

公开(公告)日：2024-10-17

申请号：US18685295

申请日：2022-06-22

Applicant: DENKA COMPANY LIMITED

Inventor： Kohei KARIYA ,  Takako EBISUZAKI ,  Motoharu FUKAZAWA

IPC: C03C12/00 ,  C03C10/00

CPC classification number: C03C12/00 ,  C03C10/0009 ,  C03C2204/00

Abstract: [Summary] One embodiment of the present invention provides a powder. The powder includes ZnO, Al2O3, and SiO2 as components. In a ternary phase diagram of the ZnO, the Al2O3, and the SiO2, the powder has a composition included in a rectangular area having as the four corners thereof (ZnO (mol %), Al2O3 (mol %), SiO2 (mol %))=(24, 13, 63), (19, 18, 63), (37, 12, 51), (32, 17, 51). The ratio (S001/S101) of the area S001 of a peak appearing in the range of 15°≤2θ≤17° and the area S101 of a peak appearing in the range of 24°≤2θ≤27° in an X-ray diffraction pattern is 0.001-0.07.

公开(公告)号：US20240092652A1

公开(公告)日：2024-03-21

申请号：US18272842

申请日：2022-01-14

Applicant: DENKA COMPANY LIMITED

Inventor： Takuji KOBAYASHI ,  Motoharu FUKAZAWA ,  Takuto OKABE ,  Mitsuru KAWAGOE

IPC: C01G23/04 ,  C09C1/36

CPC classification number: C01G23/043 ,  C09C1/36 ,  C01P2002/72 ,  C01P2006/80

Abstract: A method for producing a particle, containing a step of heating a mixture containing TiH2 and TiO2 at 700 to 950° C., wherein a molar ratio of the TiH2 to the TiO2 contained in the mixture is 5.0 to 6.8.

公开(公告)号：US20240076470A1

公开(公告)日：2024-03-07

申请号：US18269481

申请日：2021-11-24

Applicant: DENKA COMPANY LIMITED

Inventor： Toshihiko TSUNEYOSHI ,  Motoharu FUKAZAWA

IPC: C08K3/36 ,  C01B33/12 ,  C01F7/02

CPC classification number: C08K3/36 ,  C01B33/12 ,  C01F7/02 ,  C08K2003/2227

Abstract: Provided are oxide composite particles to be mixed with a resin to obtain a resin composition having high thermal conductivity, low dielectric constant, and low dielectric loss tangent. The oxide composite particles containing silica and alumina, in which the oxide composite particles contain 40 to 85% by mass of an α-cristobalite crystal phase, 5 to 50% by mass of an α-alumina crystal phase, and 10% by mass or less of a mullite crystal phase, and an elemental ratio of aluminum to silicon (aluminum/silicon) as determined by X-ray photoelectron spectroscopy is 1.5 or more.

公开(公告)号：US20230332032A1

公开(公告)日：2023-10-19

申请号：US18026889

申请日：2021-09-22

Applicant: DENKA COMPANY LIMITED

Inventor： Takuto OKABE ,  Motoharu FUKAZAWA

IPC: C09K5/14 ,  C01B33/26 ,  C08K3/34 ,  H05K1/03

CPC classification number: C09K5/14 ,  C01B33/26 ,  C08K3/34 ,  H05K1/0373 ,  C01P2006/32 ,  C01P2002/52 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2002/72 ,  C08K2201/001 ,  C08K2003/343 ,  C08K2201/005

Abstract: Oxide powder, of which a resin composition is obtained by mixing with a resin exhibits a low thermal expansion coefficient, high thermal conductivity and a low dielectric tangent. The oxide powder containing Ca, Al and Si; wherein the oxide powder contains 40% by mass or more of a crystal phase of high-temperature type cristobalite having Ca, Al and Si, based on the mass of the whole oxide powder; and wherein contents of Ca, Al and Si in the oxide powder are 1 to 5% by mole of CaO, 1 to 5% by mole of Al2O3 and 90 to 98% by mole of SiO2, respectively (the sum of contents of CaO, Al2O3 and SiO2 is 100% by mole) when converting the contents of Ca, Al and Si to contents of CaO, Al2O3 and SiO2.