公开(公告)号：US4530894A

公开(公告)日：1985-07-23

申请号：US602587

申请日：1984-04-20

申请人： Tetsuya Imamura ,  Takashi Takeuchi ,  Takashi Tetsutani ,  Shinichiro Yasuda

发明人： Tetsuya Imamura ,  Takashi Takeuchi ,  Takashi Tetsutani ,  Shinichiro Yasuda

IPC分类号： G03G9/083 ,  G03G9/097 ,  G03G9/14

CPC分类号： G03G9/083 ,  G03G9/0839 ,  G03G9/09733 ,  G03G9/09775 ,  Y10T428/2995

摘要： A magnetic toner comprises magnetic powder and a coating layer to cover said powder, the layer being a reaction product between (1) a silane coupling agent containing an amino group, an isocyanate group or an epoxy group and (2) one or more compounds having a functional group reactive with one of the reactive group on the silane coupling agent. A compound having a carboxyl group, an acid anhydride, an isocyanate compound or a ketene dimer is used for the amino group. A compound having a hydroxyl group, an amine compound or a compound having a carboxyl group is used for the isocyanate group. A compound having a hydroxyl group, a compound having a carboxyl group or a copolymer of a di- or monoalkylamino-alkyl (meth)acrylate and a hydrophobic vinyl monomer is used for the epoxy group. The magnetic toner is improved about dispersibility in a binder.

摘要翻译： 磁性调色剂包括磁性粉末和覆盖所述粉末的涂层，该层是（1）含有氨基的硅烷偶联剂，异氰酸酯基或环氧基之间的反应产物，和（2）一种或多种具有 与硅烷偶联剂上的反应性基团反应的官能团。 使用具有羧基的化合物，酸酐，异氰酸酯化合物或烯酮二聚体作为氨基。 使用具有羟基的化合物，胺化合物或具有羧基的化合物作为异氰酸酯基。 作为环氧基，使用具有羟基的化合物，具有羧基的化合物或（甲基）丙烯酸二 - 或一烷基氨基烷基酯和疏水性乙烯基单体的共聚物。 关于在粘合剂中的分散性改善了磁性调色剂。