Process for lowering charge/mass ratio of toner particles having controlled morphology and containing quaternary ammonium tetraphenylborate charge control agents
申请人:——
公开号:US20030224280A1
公开(公告)日:2003-12-04
A process for lowering the charge/mass (Q/m) ratio of toner particles formed by limited coalescence includes: forming an organic phase containing a water-immiscible liquid, pigment, a quaternary ammonium tetraphenylborate salt, and a polymeric material selected from the group consisting of an acrylic resin, a methacrylic resin, a styrene-acrylic resin, a styrene-methacrylic resin, a polyamide, and a polyester. The organic phase is dispersed in an aqueous phase containing a solid colloidal stabilizer, and a suspension of small droplets of the organic phase is formed in the aqueous phase by high shear agitation. The water-immiscible liquid is removed from the small droplets, thereby forming a suspension in the aqueous phase of small, non-spherically shaped solid particles, which are separated from the aqueous phase and dried. The quaternary ammonium tetraphenylborate salt is included in the organic phase in an amount effective for lowering the charge/mass (Q/m) ratio of the toner particles.
一种降低有限凝聚形成的调色剂粒子的电荷/质量(Q/m)比的过程包括:形成一个有机相,其中包含不溶于水的液体、颜料、季铵四苯硼酸盐和从丙烯酸树脂、甲基丙烯酸树脂、苯乙烯-丙烯酸树脂、苯乙烯-甲基丙烯酸树脂、聚酰胺和聚酯中选择的聚合材料。将有机相分散在含有固体胶体稳定剂的水相中,并通过高剪切搅拌在水相中形成小液滴的悬浮液。从小液滴中除去不溶于水的液体,从而在水相中形成小的非球形固体颗粒的悬浮液,这些颗粒从水相中分离并干燥。季铵四苯硼酸盐以有效降低调色剂粒子的电荷/质量(Q/m)比的量包含在有机相中。