申请人:Canon Kabushiki Kaisha
公开号:EP3125044A1
公开(公告)日:2017-02-01
An object of the present invention is to provide a toner having no environmental difference in charging performance, and having high stability of images after output of a large number of copies under environments at high temperature and high humidity in a higher-speed one-component developing system, and a method for producing the toner.
A toner including a toner particle including a toner base particle containing a binder resin, a colorant and a releasing agent; and a resin particle adhering to the surface of the toner base particle, wherein the resin particle contains a resin A, and the resin A has an ionic functional group and an acid dissociation constant pKa of 7.0 or more and 9.0 or less,
where R1 represents a hydroxy group, a carboxy group, an alkyl group having 1 or more and 18 or less carbon atoms, or an alkoxy group having 1 or more and 18 or less carbon atoms; R2 represents a hydrogen atom, a hydroxy group, an alkyl group having 1 or more and 18 or less carbon atoms, or an alkoxy group having 1 or more and 18 or less carbon atoms; g represents an integer of 1 or more and 3 or less; h represents an integer of 0 or more and 3 or less; and when h is 2 or 3, a number h of R1 may be the same or different.
本发明的目的是提供一种在较高速度的单组分显影系统中,充电性能无环境差异,且在高温高湿环境下输出大量复印件后图像稳定性高的墨粉,以及生产该墨粉的方法。
一种墨粉,包括墨粉基颗粒,其中墨粉基颗粒含有粘合剂树脂、着色剂和脱模剂;以及附着在墨粉基颗粒表面的树脂颗粒,其中树脂颗粒含有树脂 A,树脂 A 具有离子官能团,且酸解离常数 pKa 为 7.0 或以上、9.0 或以下、
其中 R1 代表羟基、羧基、具有 1 个或 1 个以上且 18 个或 18 个以下碳原子的烷基或具有 1 个或 1 个以上且 18 个以下碳原子的烷氧基;R2 代表氢原子、羟基、具有 1 个或更多和 18 个或更少碳原子的烷基或具有 1 个或更多和 18 个或更少碳原子的烷氧基;g 代表 1 个或更多和 3 个或更少的整数;h 代表 0 个或更多和 3 个或更少的整数;当 h 为 2 或 3 时,R1 的数字 h 可以相同或不同。