公开(公告)号：US20170088741A1

公开(公告)日：2017-03-30

申请号：US15280095

申请日：2016-09-29

Applicant: FUJIFILM Corporation

Inventor： Soichiro KITAGAWA ,  Toshihide AOSHIMA

IPC: C09D127/22 ,  G11B5/842 ,  C09D7/12 ,  C09D5/24 ,  C09D7/00

CPC classification number: C09D127/22 ,  G11B5/7305 ,  C08K13/02 ,  C08K3/04 ,  C08K5/17

Abstract: The carbon black composition for manufacturing a particulate magnetic recording medium contains carbon black, vinyl chloride resin containing one or more epoxy groups, the secondary monoamine denoted by formula 1, and solvent, wherein, in formula 1, each of R1 and R2 independently denotes an alkyl group branching off at a carbon atom, the carbon atom being present at an α-position relative to an amine nitrogen atom, and having a main structure with 7 or fewer carbon atoms, it being possible for the alkyl group denoted by R1 to be in the form of a cyclic structure, possible for the alkyl group denoted by R2 to be in the form of a cyclic structure, and possible for the alkyl group denoted by R1 and the alkyl group denoted by R2 be connected to form a cyclic structure, with neither R1 nor R2 containing a hydroxyl group.