发明名称 |
ELECTROPHOTOGRAPHIC DEVELOPER |
摘要 |
<p>PURPOSE:To obtain excellent flowability and to reduce secular changes of an electrophotographic developer, and also to make it hardly influenced by environment by using organo-polysiloxane having an epoxy group as a substituent together with polyalkyleneimine. CONSTITUTION:A powdery metal oxide is surface treated by concurrently using organo-polysiloxane having an epoxy group as a substituent and polyalkyleneimine. At this time the surface of the powdery metal oxide is provided effectively with positive electrostatic chargeability by the polyalkyleneimine which is firmly fixed through the organo-polysiloxane having high physical adhesion, on the surface of the powdery metal oxide by allowing to react the epoxy group in the organo-polysiloxane with the amino group in the polyalkyleneimne. At the same time the surface of this powdery metal oxide is provided with hydrophobic property by the organo-polysiloxane. At this time, the electrophotographic developer which contains particularly the powdery metal oxide having a >=60% hydrophobicity determined by the transmissivity method and alumina or titania as the metal oxide, is provided.</p> |
申请公布号 |
JPH0683099(A) |
申请公布日期 |
1994.03.25 |
申请号 |
JP19920255715 |
申请日期 |
1992.08.31 |
申请人 |
MITSUBISHI MATERIALS CORP |
发明人 |
NISHIHARA AKIRA;NAKAMURA AKIHIRO;MUROTA MASAMICHI |
分类号 |
G03G9/097;G03G9/08;(IPC1-7):G03G9/08 |
主分类号 |
G03G9/097 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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