| 发明名称 |
Positively chargeable toner for electrostatic image development and developer |
| 摘要 |
A positively chargeable toner for electrostatic image development according to the present disclosure is formed by aggregating at least binder resin-containing fine particles and colorant-containing fine particles in an aqueous medium in the presence of a dispersing agent and a metal ion to form fine particle aggregates and heating the fine particle aggregates to coalesce components in the fine particle aggregates. The binder resin used is a (meth)acrylic resin or styrene-(meth)acrylic resin having a certain quaternary ammonium group. The hydrophobicity (methanol wettability) is adjusted to a certain range. |
| 申请公布号 |
US9201322(B2) |
申请公布日期 |
2015.12.01 |
| 申请号 |
US201414261753 |
申请日期 |
2014.04.25 |
| 申请人 |
KYOCERA Document Solutions Inc. |
发明人 |
Kikushima Seiji |
| 分类号 |
G03G9/087;G03G9/08;G03G9/097 |
主分类号 |
G03G9/087 |
| 代理机构 |
|
代理人 |
Hespos Gerald E.;Porco Michael J.;Hespos Matthew T. |
| 主权项 |
1. A positively chargeable toner for electrostatic image development comprising: a coalesced fine particle aggregate of a binder resin, a colorant, a dispersing agent, and a metal ion, wherein
the binder resin includes at least 70 wt. % of a (meth)acrylic resin or styrene-(meth)acrylic resin having quaternary ammonium groups, wherein the (meth)acrylic resin or styrene-(meth)acrylic resin has a concentration of a monomer, which has the quaternary ammonium group, which is 1 to 45% by mass of the (meth)acrylic resin or styrene-(meth)acrylic resin, and wherein the toner has a hydrophobicity (methanol wettability) of 5% to 40%. |
| 地址 |
JP |
