| 发明名称 | Toner for image formation, and developer and image forming apparatus using the toner | ||
| 摘要 | A toner is provided. The toner includes a crosslinked polyester resin, and a block copolymer. The crosslinked polyester resin includes a diol component, which includes an aliphatic diol component having 3 to 10 carbon atoms in an amount of 50% by mole, and a crosslinked component, which is at least one of a crosslinked component of an aliphatic alcohol having three or more valences and a crosslinked component of an aliphatic acid having three or more valences, and the block copolymer includes a crystalline segment (a) and a non-crystalline segment (b). The toner has a first glass transition temperature (Tg1st) of from 20° C. to 50° C., which is determined by subjecting the toner to differential scanning calorimetry (DSC) and measuring a glass transition temperature in a first temperature rising process in the differential scanning calorimetry (DSC). | ||
| 申请公布号 | US9594322(B2) | 申请公布日期 | 2017.03.14 |
| 申请号 | US201414471024 | 申请日期 | 2014.08.28 |
| 申请人 | Ricoh Company, Ltd. | 发明人 | Amemori Suzuka;Sugimoto Tsuyoshi;Saito Akinori;Sawada Toyoshi;Makabe Keiji |
| 分类号 | G03G9/087;G03G9/08 | 主分类号 | G03G9/087 |
| 代理机构 | Oblon, McClelland, Maier & Neustadt, L.L.P. | 代理人 | Oblon, McClelland, Maier & Neustadt, L.L.P. |
| 主权项 | 1. A toner, comprising: a crosslinked polyester resin; comprising a diol component comprising an aliphatic diol component having 3 to 10 carbon atoms in an amount of not less than 50% by mole, anda crosslinked component, which is at least one of a crosslinked component of an aliphatic alcohol having three or more valences and a crosslinked component of an aliphatic acid having three or more valences; a block copolymer comprising a crystalline polyester segment (a) anda non-crystalline polyester segment (b); and a crystalline polyester resin comprising a diol component comprising a linear aliphatic diol component having 2 to 12 carbon atoms, anda dicarboxylic acid component comprising a linear aliphatic dicarboxylic having 4 to 12 carbon atoms, wherein the toner has a first glass transition temperature (Tg1st) of from 20° C. to 42° C., wherein the first glass transition temperature (Tg1st) is determined by subjecting the toner to differential scanning calorimetry (DSC) and measuring a glass transition temperature in a first temperature rising process in the differential scanning calorimetry (DSC). | ||
| 地址 | Tokyo JP | ||