发明授权
- 专利标题: Wax Containing toner aggregation processes
- 专利标题(中): 蜡含有调色剂聚集工艺
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申请号: US344060申请日: 1994-11-23
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公开(公告)号: US5482812A公开(公告)日: 1996-01-09
- 发明人: Michael A. Hopper , Raj D. Patel , Grazyna E. Kmiecik-Lawrynowicz , Stephan V. Drappel , Paul J. Gerroir
- 申请人: Michael A. Hopper , Raj D. Patel , Grazyna E. Kmiecik-Lawrynowicz , Stephan V. Drappel , Paul J. Gerroir
- 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 compositions or toner particles comprising:(i) providing an aqueous pigment dispersion comprised of a pigment, an ionic surfactant, and optionally a charge control agent;(ii) providing a wax dispersion comprised of wax, a dispersant comprised of nonionic surfactant, ionic surfactant or mixtures thereof;(iii) shearing a mixture of the wax dispersion and the 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;(iv) heating the above sheared blend below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates with a narrow particle size distribution;(v) adding additional ionic surfactant to the aggregated suspension of (iv) to ensure that no, or minimal additional particle growth of the electrostatically bound toner size aggregates occurs on further increasing the temperature to coalesce the aggregates into toner particles (vi);(vi) heating the mixture of (v) with bound aggregates above about or at the Tg of the resin; and optionally(vii) separating the toner particles from the aqueous slurry by filtration and thereafter optionally washing.
公开/授权文献
- US4892170A Portable ladder assembly 公开/授权日:1990-01-09
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