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：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：US20240025741A1

公开(公告)日：2024-01-25

申请号：US18041934

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C01B21/064 ,  C08K7/00 ,  C08J3/20 ,  C09K5/14

CPC classification number: C01B21/064 ,  C08K7/00 ,  C08J3/203 ,  C09K5/14 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2006/32 ,  C08K2201/001 ,  C08K2201/004

Abstract: A boron nitride particle having a shape in which a diameter gradually increases from one end toward the other end. A boron nitride particle including a plurality of portions each having a shape in which a diameter gradually increases from one end toward the other end, in which the plurality of portions bond to each other on the other end side.

公开(公告)号：US20230294991A1

公开(公告)日：2023-09-21

申请号：US18041860

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

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

CPC classification number: C01B21/0645 ,  C08K7/24 ,  C09C3/041 ,  C01P2004/10 ,  C01P2002/72 ,  C01P2004/03 ,  C08K2201/004

Abstract: A boron nitride particle having a bent shape. 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：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：US20200247672A1

公开(公告)日：2020-08-06

申请号：US16755715

申请日：2018-08-17

Applicant: DENKA COMPANY LIMITED

Inventor： Go TAKEDA ,  Michiharu NAKASHIMA ,  Yoshitaka TANIGUCHI

IPC: C01B21/064

Abstract: To provide a boron nitride powder having excellent heat conductivity and high particle strength. Provided is a boron nitride powder which comprises bulky boron nitride formed such that scaly primary particles of hexagonal boron nitride are aggregated to form bulky particles, and which has the following characteristics (A) to (C): (A) a particle strength of the bulky particles at a cumulative breakdown rate of 63.2% is 5.0 MPa or more; (B) an average particle size of the boron nitride powder is 2 μm or more and 20 μm or less; and (C) an orientation index of the boron nitride powder as determined from X-ray diffraction is 20 or less.