公开(公告)号：US5665506A

公开(公告)日：1997-09-09

申请号：US593521

申请日：1996-01-30

申请人： Koichi Kashima ,  Hajime Yamazaki ,  Shinji Otani ,  Kiyokazu Takasou ,  Makoto Nagaoka ,  Hiroshi Hamada

发明人： Koichi Kashima ,  Hajime Yamazaki ,  Shinji Otani ,  Kiyokazu Takasou ,  Makoto Nagaoka ,  Hiroshi Hamada

IPC分类号： C08F2/18 ,  C08F291/00 ,  G03G5/087 ,  G03G9/08 ,  G03G9/087

CPC分类号： G03G9/08711 ,  C08F2/18 ,  C08F291/00 ,  G03G9/0804 ,  G03G9/0806 ,  G03G9/0812

摘要： Disclosed is a process for preparing a particulate toner for developing an electrostatic image, which comprises suspending a polymerizable monomer composition comprising a polymerizable monomer, a resin dissolved therein, and a coloring agent in an aqueous medium not containing a dispersant to prepare a pre-suspension, jetting the pre-suspension through a nozzle under elevated pressure in a flowing direction which is forced to vary so that the pre-suspension collides with a predetermined plane or with each other, and then immediately passing the pre-suspension through an apparatus for throttling the path to produce back pressure and shearing stress to prepare a suspension containing a particulate polymerizable monomer and subjecting the resulting suspension to polymerization. The toner prepared by the process is a high performance toner which is free of finely divided grains and emulsion, exhibits a high chargeability, a uniform chargeability distribution, an excellent environmental stability and a high definition, and is insusceptibie to fogging and unevenness.

摘要翻译： 公开了一种制备用于显影静电图像的颗粒调色剂的方法，其包括将包含可聚合单体的可聚合单体组合物，溶解在其中的树脂和着色剂悬浮在不含分散剂的水性介质中以制备预悬浮液 在升高的压力下，通过喷嘴在流动方向上喷射预悬浮液，该流动方向被迫改变，使得预悬浮物与预定平面或彼此碰撞，然后立即通过预悬浮液通过用于节流的装置 产生背压和剪切应力的路径以制备含有颗粒状可聚合单体的悬浮液并使所得悬浮液进行聚合。 通过该方法制备的调色剂是不含细碎颗粒和乳液的高性能调色剂，显示出高的带电性，均匀的带电能力分布，优异的环境稳定性和高清晰度，并且不利于起雾和不均匀。