发明授权
- 专利标题: Toner processes
- 专利标题(中): 墨粉处理
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申请号: US720646申请日: 1996-10-02
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公开(公告)号: US5650256A公开(公告)日: 1997-07-22
- 发明人: Richard P. N. Veregin , Maria N. V. McDougall , Francisco E. Torres , Raj D. Patel , Grazyna E. Kmiecik-Lawrynowicz , T. Hwee Ng , Arthur Helbrecht
- 申请人: Richard P. N. Veregin , Maria N. V. McDougall , Francisco E. Torres , Raj D. Patel , Grazyna E. Kmiecik-Lawrynowicz , T. Hwee Ng , Arthur Helbrecht
- 申请人地址: CT Stamford
- 专利权人: Xerox Corporation
- 当前专利权人: Xerox Corporation
- 当前专利权人地址: CT Stamford
- 主分类号: G03G9/08
- IPC分类号: G03G9/08 ; G03G9/087
摘要:
A process for the preparation of toner comprising:(i) preparing a pigment dispersion, which dispersion is comprised of a pigment, and an ionic surfactant;(ii) shearing said pigment dispersion with a latex or emulsion blend comprised of resin, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and a nonionic surfactant, and wherein said resin contains an acid functionality;(iii) heating the above sheared blend below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates;(iv) adding anionic surfactant to stabilize the aggregates obtained in (iii);(v) coalescing said aggregates by heating said bound aggregates above about the Tg of the resin;(vi) reacting said resin of (v) with acid functionality with a base to form an acrylic acid salt, and which salt is ion exchanged in water with a base or a salt, optionally in the presence of metal oxide particles, to control the toner triboelectrical charge, which toner is comprised of resin and pigment; and(vii) optionally drying the toner obtained.