公开(公告)号：US20240253989A1

公开(公告)日：2024-08-01

申请号：US18040588

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Mana YAMAMOTO ,  Kenji MIYATA ,  Yusuke SASAKI

IPC: C01B21/064 ,  C08K3/38

CPC classification number: C01B21/0648 ,  C08K3/38 ,  C01P2002/74 ,  C01P2004/03 ,  C01P2004/45 ,  C01P2006/90 ,  C08K2003/385 ,  C08K2201/004

Abstract: A boron nitride particle having a long and thin shape, in which, when the boron nitride particle is subjected to a loading and unloading test comprising a loading step and unloading step in this order, at least a part of a length in the lateral direction of the boron nitride particle compressed in the loading step returns in the unloading step, in which the loading step includes gradually applying a load from 0.2 mN up to 20 mN at a loading rate of 0.27 mN/second in a lateral direction of the boron nitride particle to compress the boron nitride particle, and the unloading step includes gradually unloading the boron nitride particle to 0.2 mN at an unloading rate of 0.27 mN/second.

公开(公告)号：US20240158230A1

公开(公告)日：2024-05-16

申请号：US18283624

申请日：2022-03-22

Applicant: DENKA COMPANY LIMITED

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Kei KUBOBUCHI ,  Takako ARAI

IPC: C01B21/064 ,  C08K3/38

CPC classification number: C01B21/064 ,  C08K3/38 ,  C01P2004/03 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/16 ,  C01P2006/21 ,  C01P2006/32 ,  C08K2003/385 ,  C08K2201/003 ,  C08K2201/006

Abstract: A method for producing a boron nitride particle, including: a step of pressurizing and heating a particle containing boron carbide under a nitrogen atmosphere to obtain a particle containing boron carbonitride; a step of putting a mixture containing a boron source containing at least one selected from the group consisting of boric acid and boron oxide and the particle containing boron carbonitride into a container; and a step of pressurizing and heating the mixture under a nitrogen atmosphere in a state where airtightness in the container has been enhanced to obtain a boron nitride particle, wherein an amount of boron atoms in the boron source is 1.0 to 2.2 mol with respect to 1 mol of the boron carbonitride in the mixture.

公开(公告)号：US20230132023A1

公开(公告)日：2023-04-27

申请号：US17906906

申请日：2021-03-29

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA ,  Seiji SHIRAISHI

IPC: C01B21/064

Abstract: A method for producing an aggregated boron nitride particle, containing: a nitriding step of nitriding a particle containing boron carbide to obtain a particle containing boron carbonitride; and a decarburizing step of decarburizing the particle containing boron carbonitride to obtain an aggregated boron nitride particle, wherein, in the nitriding step, nitriding is performed so that boron carbide remains inside the particle containing boron carbonitride, and wherein, in the decarburizing step, the boron carbide remaining inside the particle containing boron carbonitride is removed.

公开(公告)号：US20230017856A1

公开(公告)日：2023-01-19

申请号：US17784959

申请日：2020-12-11

Applicant: DENKA COMPANY LIMITED

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C08J5/18 ,  C08K3/38 ,  C01B21/064 ,  H01L23/36

Abstract: A method of producing a resin sheet, including: mixing blocky boron nitride particles A, blocky boron nitride particles B, and a resin composition, and molding the resin composition to a sheet form and pressurizing the sheet form resin composition, the boron nitride primary particles a having a length in a shorter direction of 0.7 μm or less, the boron nitride primary particles b having a length in a shorter direction of 1 μm or more, the blocky boron nitride particles A having an average particle diameter of 30 μm or more, the blocky boron nitride particles B having an average particle diameter that is smaller than the average particle diameter of the blocky boron nitride particles A, the compressive strengths ratio of the blocky boron nitride particles A to the blocky boron nitride particles B being 1.2 or more. Thus, the thermal conductivity of a resin sheet can be enhanced.

公开(公告)号：US20230295399A1

公开(公告)日：2023-09-21

申请号：US18041830

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C08K3/38

CPC classification number: C08K3/38 ,  C08K2003/385

Abstract: A method for producing a boron nitride particle, including a step of disposing a mixture and a base material in a container formed of a carbon material, in which the mixture includes boron carbide and boric acid, and the base material is formed of a carbon material and a step of generating a boron nitride particle on the base material by heating and pressurization with a nitrogen atmosphere formed in the container. A boron nitride particle having a maximum length of 80 μm or longer, and an aspect ratio of 1.5 or more.

公开(公告)号：US20250066197A1

公开(公告)日：2025-02-27

申请号：US18723859

申请日：2022-12-23

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C01B21/064 ,  C08K3/38

Abstract: The boron nitride particle of the present invention in cross section includes a streaky void. The heat dissipation sheet of the present invention is obtained by forming a thermally conductive resin composition including the boron nitride particle of the present invention and a resin. According to the present invention, a boron nitride particle having a small porosity and a heat dissipation sheet including the boron nitride particle can be provided.

公开(公告)号：US20240174908A1

公开(公告)日：2024-05-30

申请号：US18283482

申请日：2022-03-22

Applicant: DENKA COMPANY LIMITED

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Kei KUBOBUCHI ,  Tomonari MIYAZAKI

IPC: C09K5/14 ,  C01B21/064 ,  C08K3/38

CPC classification number: C09K5/14 ,  C01B21/0646 ,  C08K3/38 ,  C01P2004/03 ,  C01P2004/50 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/16 ,  C01P2006/21 ,  C01P2006/32 ,  C08K2003/385 ,  C08K2201/001 ,  C08K2201/005

Abstract: A boron nitride powder that is an aggregate of boron nitride particles, wherein the boron nitride powder has a BET specific surface area of 4.6 m2/g or more, and an average pore diameter of 0.65 μm or less. A resin composition containing: the boron nitride powder, and a resin.

公开(公告)号：US20240010817A1

公开(公告)日：2024-01-11

申请号：US18041851

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C08K7/24 ,  C08J5/18

CPC classification number: C08K7/24 ,  C08J5/18 ,  C08K2201/004 ,  C08K2003/385

Abstract: A sheet containing a resin and boron nitride particles each having a hollow part, in which the resin is filled into the hollow part of the boron nitride particles.

公开(公告)号：US20230323090A1

公开(公告)日：2023-10-12

申请号：US18041901

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C08K7/24 ,  C01B21/064 ,  C09C3/04

CPC classification number: C08K7/24 ,  C01B21/064 ,  C09C3/041 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2002/72 ,  C01P2004/133

Abstract: A boron nitride particle having a shell part formed of boron nitride and a hollow part surrounded by the shell part, in which a density of the boron nitride on an inside of the shell part is higher than a density of the boron nitride on an outside of the shell part. A resin composition containing the boron nitride particle and a resin. A method for producing a resin composition including a step of preparing the boron nitride particle and a step of mixing the boron nitride particle with a resin.

公开(公告)号：US20220073698A1

公开(公告)日：2022-03-10

申请号：US17423256

申请日：2020-01-28

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Fumihiro KUROKAWA ,  Kohki ICHIKAWA

IPC: C08K3/38 ,  C01B21/064 ,  C08G59/40 ,  C08G59/20 ,  C08K7/18

Abstract: One aspect of the present invention is a boron nitride powder composed of aggregates of primary particles of boron nitride, wherein the boron nitride powder has an average diameter of 40 μm or more and an average sphericity of less than 0.70.