| 发明名称 | Toner for electrophotography, developer, image forming method, and process cartridge | ||
| 摘要 | To provide a toner, including: a crystalline binder resin including a urethane bond or a urea bond, or both thereof; and a colorant, wherein the colorant has a number-average particle diameter of 0.5 μm or less, and a ratio of particles having a particle diameter of 0.7 μm or greater in a number-size distribution of the colorant is 5% by number or less. | ||
| 申请公布号 | US8852834(B2) | 申请公布日期 | 2014.10.07 |
| 申请号 | US201213680274 | 申请日期 | 2012.11.19 |
| 申请人 | Ricoh Company, Ltd. | 发明人 | Santo Hideyuki;Nakayama Shinya;Yamamoto Atsushi;Yamashita Daiki;Amemori Suzuka |
| 分类号 | G03G9/08;G03G9/087;G03G9/09;G03G13/20 | 主分类号 | G03G9/08 |
| 代理机构 | Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. | 代理人 | Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. |
| 主权项 | 1. A toner, comprising: a crystalline binder resin comprising a urethane bond or a urea bond, or both thereof; and a colorant, wherein the colorant has a number-average particle diameter of 0.5 μm or less, and a ratio of particles having a particle diameter of 0.7 μm or greater in a number-size distribution of the colorant is 5% by number or less. | ||
| 地址 | Tokyo JP | ||