公开(公告)号：US06506531B1

公开(公告)日：2003-01-14

申请号：US09434403

申请日：1999-11-05

申请人： Toshiyuki Hakata ,  Hiroomi Kakihara ,  Masaaki Fukugauchi ,  Kenji Okada ,  Yushi Mikuriya ,  Kazumi Yoshizaki

发明人： Toshiyuki Hakata ,  Hiroomi Kakihara ,  Masaaki Fukugauchi ,  Kenji Okada ,  Yushi Mikuriya ,  Kazumi Yoshizaki

IPC分类号： G03G9113

CPC分类号： G03G9/1135 ,  G03G9/107 ,  G03G9/1139

摘要： A magnetic carrier exhibiting excellent durability against mechanical impact as exerted by vibration and capable of exhibiting a stable charging performance in electrophotography is provided. The magnetic carrier is formed through a process including steps of: surface treating inorganic compound particles with a lipophilizing agent having a functional group (A) selected from epoxy group, amino group, mercapto group, organic acid group, ester group, ketone group, halogenated alkyl group and aldehyde group; forming composite particles from the surface-treated inorganic compound particles and a binder resin; and then surface-coating the composite particles with a coupling agent having a functional group (B) different from the functional group (A) of the lipophilizing agent and selected from epoxy group, amino group and mercapto group, or with a coating resin having a functional group (C) different from the functional group (A) of the lipophilizing agent and selected from epoxy group, amino group, organic acid group, ester group, ketone group and halogenated alkyl group.

摘要翻译： 本发明提供了一种磁性载体，其通过振动表现出优异的机械冲击耐久性并能够在电子照相术中表现出稳定的充电性能。 磁性载体通过以下步骤形成：包括以下步骤形成的无机化合物颗粒：用具有选自环氧基，氨基，巯基，有机酸基，酯基，酮基，卤代的官能团（A）的亲脂性表面处理无机化合物颗粒 烷基和醛基; 从表面处理的无机化合物颗粒和粘合剂树脂形成复合颗粒; 然后用具有与脂质体的官能团（A）不同的选自环氧基，氨基和巯基的官能团（B）的偶联剂或与具有 官能团（C）与脂肪酶官能团（A）不同，选自环氧基，氨基，有机酸基，酯基，酮基和卤代烷基。

公开(公告)号：US5654120A

公开(公告)日：1997-08-05

申请号：US538951

申请日：1995-10-04

申请人： Toshiyuki Hakata ,  Hiroomi Kakihara ,  Masaaki Fukugauchi

发明人： Toshiyuki Hakata ,  Hiroomi Kakihara ,  Masaaki Fukugauchi

IPC分类号： G03G9/10 ,  G03G9/107 ,  G03G9/113 ,  G03G9/083

CPC分类号： G03G9/10 ,  G03G9/107 ,  G03G9/1133 ,  G03G9/1137 ,  G03G9/1139

摘要： The disclosure describes a magnetic carrier for electrophotography having a number-average particle diameter of 1 to 1000 .mu.m, and comprising ferromagnetic iron compound particles, non-magnetic metal oxide particles and a phenol-based resin as a binder resin, the total amount of said ferromagnetic iron compound particles and said non-magnetic metal oxide particles being 80 to 99 wt %, and the ratio of the number-average particle diameter of said non-magnetic metal oxide particles and the number-average particle diameter of said ferromagnetic iron compound particles being more than 1.0.

摘要翻译： 本发明公开了一种电子照相用磁性载体，其数均粒径为1-1000μm，并且包含铁磁性铁化合物颗粒，非磁性金属氧化物颗粒和作为粘合剂树脂的苯酚类树脂，其总量 所述铁磁性铁化合物粒子和所述非磁性金属氧化物粒子的比例为80〜99重量％，所述非磁性金属氧化物粒子的数均粒径与所述铁磁性铁化合物的数均粒径的比例 颗粒大于1.0。