公开(公告)号：US20030073016A1

公开(公告)日：2003-04-17

申请号：US10141959

申请日：2002-05-10

Applicant: Toda Kogyo Corp.

Inventor： Kazuyuki Hayashi ,  Hiroko Morll ,  Yasuyuki Tanaka ,  Seiji Ishitani

IPC: G03G009/083

CPC classification number: G03G9/083 ,  G03G9/0833 ,  G03G9/0836 ,  G03G9/0839 ,  G03G9/08773 ,  G03G9/0902 ,  G03G9/0904 ,  Y10S428/90 ,  Y10T428/2991 ,  Y10T428/2995 ,  Y10T428/2998

Abstract: Black magnetic toner comprising: a binder resin, and black magnetic composite particles comprising: magnetic iron oxide particles having an average particle diameter of 0.055 to 0.95 nullm; a coating layer formed on the surface of said magnetic iron oxide particles, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, (2) polysiloxanes or modified polysiloxanes, and (3) fluoroalkyl organosilane compounds obtainable from fluoroalkylsilane compounds; and a carbon black coat formed on said coating layer comprising said organosilicon compound, in an amount of 1 to parts by weight based on 100 parts by weight of said magnetic iron oxide particles. Such a black magnetic toner can be free from being deteriorated in electric resistance due to the existence of the carbon black coat, and as a result, is suitable as a high-resistance or insulated magnetic toner.

Abstract translation: 黑色磁性调色剂，其包含：粘合剂树脂和黑色磁性复合颗粒，其包含平均粒径为0.055至0.95μm的磁性氧化铁颗粒; 在所述磁性氧化铁颗粒的表面上形成的涂层，其包含至少一种选自以下的有机硅化合物：（1）由烷氧基硅烷化合物获得的有机硅烷化合物，（2）聚硅氧烷或改性聚硅氧烷，和（3）氟代烷基 由氟烷基硅烷化合物得到的有机硅烷化合物; 以及基于100重量份的所述磁性氧化铁颗粒，在包含所述有机硅化合物的所述涂层上形成的炭黑涂层，其量为1至重量份。 这种黑色磁性调色剂由于存在炭黑涂层而不会劣化电阻，因此适合作为高电阻或绝缘的磁性调色剂。