公开(公告)号：EP3104227A1

公开(公告)日：2016-12-14

申请号：EP15746245.8

申请日：2015-02-04

申请人： Sakata INX Corp.

发明人： IWASE Koji ,  OKAMOTO Katsutoshi ,  SHIBATA Hideo ,  MAEDA Hirohito ,  INOUE Tomoaki

IPC分类号： G03G9/13

CPC分类号： G03G9/132 ,  G03G9/131 ,  G03G9/135 ,  G03G9/1355

摘要： An object is to provide a liquid developer for electrophotography or electrostatic recording, having good uniformity, preservation stability, fixing property, and electrophoretic migration property of particles. As the means of achieving the object, a liquid developer is provided whose colored resin particles are constituted by at least a pigment, a binder resin containing acid group-containing resin, a basic group-containing pigment dispersion agent, and a granulating aid, with the colored resin particles formed in an insulating solvent by utilizing the coacervation method, wherein a carbodiimide compound having at least one carbodiimide group is used as the granulating aid, with the ratio of the number of active hydrogens in the acid group-containing resin to the number of carbodiimide groups in the carbodiimide compound adjusted to 1:(0.01 or more but less than 1.00), and the colored resin particles are dispersed in the insulating solvent by means of a particle dispersion agent.

摘要翻译： 本发明的目的在于提供一种粒子的均匀性，保存稳定性，定影性，电泳迁移性良好的电子照相或静电记录用液体显影剂。 作为实现该目的的手段，提供一种液体显影剂，其着色树脂颗粒至少由颜料，含有含酸基团的树脂的粘合剂树脂，含碱性基团的颜料分散剂和造粒助剂构成，其中 通过利用凝聚法在绝缘溶剂中形成的着色树脂颗粒，其中具有至少一个碳化二亚胺基团的碳二亚胺化合物用作造粒助剂，含酸基团的树脂中活性氢的数量与 将碳二亚胺化合物中的碳化二亚胺基的个数调整为1 :( 0.01以上且小于1.00），使用粒子分散剂将着色树脂粒子分散在绝缘性溶剂中。