US 12,435,208 B2
Carbon material granulated product, method for producing carbon material granulated product, and conductive resin composition
Hideyuki Hisashi, Oita (JP); Noritaka Sakuta, Tokyo (JP); and Ryosuke Takamiya, Tokyo (JP)
Assigned to DR. GOO Co., Ltd., (JP)
Appl. No. 18/834,144
Filed by DR. GOO Co., Ltd., Oita (JP)
PCT Filed Dec. 27, 2022, PCT No. PCT/JP2022/048066
§ 371(c)(1), (2) Date Jul. 29, 2024,
PCT Pub. No. WO2023/149136, PCT Pub. Date Aug. 10, 2023.
Claims priority of application No. 2022-014386 (JP), filed on Feb. 1, 2022.
Prior Publication US 2025/0109278 A1, Apr. 3, 2025
Int. Cl. C08K 9/08 (2006.01); C09C 1/58 (2006.01); C09C 3/00 (2006.01); C09C 3/04 (2006.01); C09C 3/10 (2006.01)
CPC C08K 9/08 (2013.01) [C09C 1/58 (2013.01); C09C 3/006 (2013.01); C09C 3/041 (2013.01); C09C 3/045 (2013.01); C09C 3/10 (2013.01); C01P 2004/01 (2013.01); C01P 2004/50 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); C08K 2201/001 (2013.01)] 2 Claims
 
1. A method for producing a carbon material granulated product, comprising:
dry grinding and mixing a granular carbon black and a granular carbon nanotube so that the carbon black has a particle size D50, as determined by a laser diffraction/scattering method specified in ISO 13320, of 10 μm or more and 250 μm or less and the carbon nanotube has a particle size D50, as determined by the laser diffraction/scattering method specified in ISO 13320, of 10 μm or more and 50 μm or less to obtain a mixture;
preparing a binder solution by dissolving a solvent-soluble polymer in a solvent; and
performing mixing and granulation while adding the binder solution to the mixture to obtain a carbon material granulated product; wherein
the dry grinding for the granular carbon black is performed using at least one selected from the group consisting of an impeller mill, a pin mill, and a roller mill,
the solvent-soluble polymer is at least one selected from the group consisting of ether polymers, vinyl polymers, amine polymers, cellulose polymers, and starch polymers, and
a content of the solvent-soluble polymer impregnated into the carbon black and the carbon nanotube is in a range from 1 part by mass to 15 parts by mass relative to a total content of the carbon black and the carbon nanotube taken as 100 parts by mass.