公开(公告)号：US5705306A

公开(公告)日：1998-01-06

申请号：US645126

申请日：1996-05-13

申请人： Ryuji Kitani ,  Meizo Shirose ,  Tatsuya Nagase ,  Keiko Ujihara ,  Michiaki Ishikawa

发明人： Ryuji Kitani ,  Meizo Shirose ,  Tatsuya Nagase ,  Keiko Ujihara ,  Michiaki Ishikawa

IPC分类号： G03G9/087 ,  G03G9/09 ,  G03G9/097 ,  G03G9/113

CPC分类号： G03G9/09 ,  G03G9/08751 ,  G03G9/09708 ,  G03G9/1133

摘要： A toner for forming an electrophotographic image is disclosed. The toner comprises (1) colored particles comprising a resin and a colorant, (2) fine resin particles comprising a polymer formed by condensation of melamine and formaldehyde, and have a volume average diameter of 0.01 .mu.m to 1.0 .mu.m, and (3) fine particles of an inorganic material (I) having a volume average diameter of 0.01 .mu.m to 0.20 .mu.m and a standard deviation of distribution of the volume average diameter G satisfying the condition of 10.ltoreq..sigma..ltoreq.30. It is particularly preferred that the toner is used as a tow componet developer together with a negatively chargeable carrier which comprises (1) magnetic core particles each coated with a coating layer comprising a mixture of homopolymer of an alicyclic methacrylate monomer and a homopolymer of an acyclic methacrylate monomer, or a copolymer of an alicyclic methacrylate monomer and an acyclic methacrylate monomer, and (2) a fine particles of an inorganic material (II).

摘要翻译： 公开了一种用于形成电子照相图像的调色剂。 调色剂包括（1）包含树脂和着色剂的着色颗粒，（2）包含由三聚氰胺和甲醛缩合形成的聚合物的细树脂颗粒，体积平均直径为0.01μm至1.0μm，和（3 ）体积平均直径为0.01μm至0.20μm的无机材料（I）的细颗粒和满足条件为10≤Δ≤30的体积平均直径G的分布的标准偏差。 特别优选的是，调色剂与负电荷载体一起用作丝束组分显影剂，其包含（1）各自涂覆有包含脂环族甲基丙烯酸酯单体的均聚物和非环状的均聚物的混合物的涂层的磁芯颗粒 甲基丙烯酸酯单体或脂环族甲基丙烯酸酯单体和无环状甲基丙烯酸酯单体的共聚物，（2）无机材料（II）的微粒。