发明名称 |
Toner for developing electrostatic images, image forming method and image forming apparatus |
摘要 |
A toner for developing electrostatic images, comprises a binder resin and a colorant, wherein the binder resin comprises a vinyl copolymer having an acid anhydride group, and the binder resin has a total acid value (A) of 2-100 mgKOH/g and a total acid value (B) attributable to acid anhydride group of below 6 mgKOH/g so that [(B)/(A)]x100 is 60% or less. Because the binder resin has a specified acid value partly attributable to acid anhydride group, the toner is provided with an adequate balance between chargeability and dischargeability, so that the toner shows a stable performance under various environmental conditions. The toner is particularly advantageously constituted as a magnetic toner of fine particle sizes suitably used under application of unsymmetrical alternating bias electric field.
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申请公布号 |
US5212524(A) |
申请公布日期 |
1993.05.18 |
申请号 |
US19920937114 |
申请日期 |
1992.08.31 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
TANIKAWA, HIROHIDE;AKASHI, YASUTAKA;UCHIYAMA, MASAKI;UNNO, MAKOTO;TAYA, MASAAKI |
分类号 |
G03G9/08;G03G9/083;G03G9/087 |
主分类号 |
G03G9/08 |
代理机构 |
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地址 |
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