| 发明名称 | Toner, development agent, and image forming apparatus using the same | ||
| 摘要 | A toner includes a binder resin, a coloring agent, and a releasing agent containing two or more kinds of alkyl monoester compounds having a different number of carbon atoms in a range of from 30 to 50 carbon atoms. The toner has a crystallinity of 10% or more as measured by x-ray diffraction and/or the binder resin is a crystalline resin in an amount of 50% by weight or more of the binder resin. The two or more kinds of alkyl monoester compounds include a component A accounting for the largest amount ranging from 30% by weight to less than 50% by weight of the releasing agent and a component B accounting for the second largest amount ranging from 10% by weight to less than 50% by weight of the releasing agent. | ||
| 申请公布号 | US8883385(B2) | 申请公布日期 | 2014.11.11 |
| 申请号 | US201213705811 | 申请日期 | 2012.12.05 |
| 申请人 | Ricoh Company, Ltd. | 发明人 | Sakashita Shingo;Yamashita Hiroshi;Yamada Masahide;Nakayama Shinya;Yamamoto Atsushi;Nakajima Yukiko |
| 分类号 | G03G9/097;G03G9/08 | 主分类号 | G03G9/097 |
| 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 binder resin; a coloring agent; and a releasing agent consisting of an ester wax, wherein the ester wax comprises two or more kinds of alkyl monoester compounds having a different number of carbon atoms in a range of from 30 to 50 carbon atoms, the toner having a crystallinity of 10% or more as measured by x-ray diffraction and/or the binder resin comprising a crystalline resin in an amount of 50% by weight or more of the binder resin, the two or more kinds of alkyl monoester compounds including a component A accounting for the largest amount ranging from 30% by weight to less than 50% by weight of the ester wax and a component B accounting for the second largest amount ranging from 10% by weight to less than 50% by weight of the ester wax. | ||
| 地址 | Tokyo JP | ||