发明授权
- 专利标题: Toner aggregation processes
- 专利标题(中): 调色剂聚合过程
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申请号: US203095申请日: 1994-02-28
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公开(公告)号: US5391456A公开(公告)日: 1995-02-21
- 发明人: Raj D. Patel , Grazyna E. Kmiecik-Lawrynowicz , Michael A. Hopper , Melvin D. Croucher
- 申请人: Raj D. Patel , Grazyna E. Kmiecik-Lawrynowicz , Michael A. Hopper , Melvin D. Croucher
- 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: G03G9/087
- IPC分类号: G03G9/087 ; G03G9/08 ; G03G9/09
摘要:
A process for the preparation of toner compositions comprising:(i) forming a dispersion of resin in an aqueous ionic surfactant solution;(ii) preparing pigment dispersions in water of three different pigments each of a dissimilar color, each dispersion being comprised of a pigment dispersed in water and which preparation utilizes nonionic dispersants, and optionally an ionic surfactant;(iii) blending the prepared resin dispersed as a latex with two, or optionally three of the different color pigment dispersions of step (ii);(iv) adding an aqueous solution of counterionic surfactant as a coagulant to the formed resin-pigment blends, while continuously subjecting the mixture to high shear, to induce a homogeneous gel of the flocculated resin-pigments blend;(v) heating the above sheared gel at temperatures between about 20.degree. C. and about 5.degree. C. below the glass transition temperature (Tg) of the resin while continuously stirring at speeds between about 200 and about 500 revolutions per minute to form statically bound toner sized aggregates between about 2 and about 12 microns in average volume diameter with a narrow size dispersity and with a geometric size distribution (GSD) between 1.10 and 1.25;(vi) heating the statically bound aggregated particles at temperatures of from between 25.degree. C. and 40.degree. C. above the Tg of the resin to form coalesced rigid particles of a toner composition comprised of polymeric resin, and pigment agent; and optionally(vii) separating and drying said toner.
公开/授权文献
- US6089426A Opened shotgun holster 公开/授权日:2000-07-18