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    Toner aggregation processes
    81.
    发明授权
    Toner aggregation processes 失效

    公开(公告)号：US5622806A

    公开(公告)日：1997-04-22

    申请号：US576246

    申请日：1995-12-21

    Applicant: Richard P. N. Veregin ,  Maria N. V. McDougall

    Inventor： Richard P. N. Veregin ,  Maria N. V. McDougall

    IPC: G03G9/08 ,  G03G9/087 ,  G03G9/093

    CPC classification number: G03G9/0804 ,  G03G9/0815

    Abstract: A process for the preparation of toner compositions with controlled particle size comprising:(i) preparing a pigment dispersion in water, which dispersion is comprised of a pigment, an ionic surfactant in amounts of from about 0.5 to about 10 percent by weight to water, and an optional charge control agent;(ii) shearing the pigment dispersion with a latex mixture comprised of a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant, a nonionic surfactant, and resin particles, thereby causing a flocculation or heterocoagulation of the formed particles of pigment, resin, and charge control agent;(iii) stirring the resulting sheared viscous mixture of (ii) at from about 300 to about 1,000 revolutions per minute to form electrostatically bound substantially stable toiler size aggregates with a narrow particle size distribution;(iv) reducing the stirring speed in (iii) to from about 100 to about 600 revolutions per minute, and subsequently adding further anionic or nonionic surfactant in the range of from about 0.1 to about 10 percent by weight of water to control, prevent, or minimize further growth or enlargement of the particles in the coalescence step (v);(v) heating and coalescing from about 5.degree. to about 50.degree. C. above about the resin glass transition temperature, Tg, which resin Tg is from between about 45.degree. C. to about 90.degree. C., the statically bound aggregated particles to form said toner composition comprised of resin, pigment and optional charge control agent;(vi) washing the aggregated particles at a temperature of from about 15.degree. C. to about 5.degree. C. below the glass transition temperature of the resin, and subsequently filtering the aggregated particles until substantially all of the surfactant has been removed from the aggregated particles, followed by subsequent driving of the particles at a temperature of from about 15.degree. C. to about 5.degree. C. below the glass transition temperature of the resin; and(vii) subsequently adding to said toner product a first layer of a hydrophilic oxide, and a second layer of a hydrophobic oxide.

    Polymerization processes
    82.
    发明授权
    Polymerization processes 失效
    聚合工艺

    公开(公告)号：US5610250A

    公开(公告)日：1997-03-11

    申请号：US620728

    申请日：1996-03-25

    Applicant: Richard P. N. Veregin ,  Peter M. Kazmaier ,  Michael K. Georges ,  Gordon K. Hamer

    Inventor： Richard P. N. Veregin ,  Peter M. Kazmaier ,  Michael K. Georges ,  Gordon K. Hamer

    IPC: C08F2/38 ,  C08F10/00

    CPC classification number: C08F10/00

    Abstract: A polymerization process comprising: heating a mixture comprised of a free radical initiator, a stable free radical agent, at least one polymerizable monomer compound, and optionally a solvent, to form a polymer with a high monomer to polymer conversion and a narrow polydispersity, wherein said polymer is comprised of a covalently bound free radical initiator fragment at one end and a covalently bound stable free radical compound at the other end of the polymer, and wherein said stable free radical agent has high thermal, acidic, and photochemical stability.

    Abstract translation: 一种聚合方法，包括：加热由自由基引发剂，稳定的自由基试剂，至少一种可聚合单体化合物和任选的溶剂组成的混合物，以形成具有高单体与聚合物转化率和窄的多分散性的聚合物，其中 所述聚合物由一端的共价结合的自由基引发剂片段和在聚合物的另一端共价结合的稳定的自由基化合物组成，并且其中所述稳定的自由基试剂具有高的热，酸和光化学稳定性。

    Coated carriers by aggregation processes
    83.
    发明授权
    Coated carriers by aggregation processes 失效
    通过聚合过程的涂层载体

    公开(公告)号：US5565296A

    公开(公告)日：1996-10-15

    申请号：US497737

    申请日：1995-07-03

    Applicant: Grazyna E. Kmiecik-Lawrynowicz ,  Richard P. N. Veregin ,  Raj D. Patel ,  Michael A. Hopper ,  Maria V. McDougall

    Inventor： Grazyna E. Kmiecik-Lawrynowicz ,  Richard P. N. Veregin ,  Raj D. Patel ,  Michael A. Hopper ,  Maria V. McDougall

    IPC: C08J3/215 ,  G03G9/113

    CPC classification number: C08J3/215 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1138 ,  G03G9/1139

    Abstract: A process for the preparation of polymer compositions which comprises mixing a conductive component with an anionic polymeric latex containing a polymer; adding a cationic surfactant, or flocculant whereby the aggregation of the latex particles and the conductive component particles results; subsequently adding colloidal stabilizer, followed by the addition of a base to obtain a pH of from about 7 to about 12; heating above about the polymer glass transition temperature thereby enabling the severage, or breakage of the formed aggregated particles; further heating above about the polymer glass transition temperature enabling the coalescence of the polymer and conductive component particles; and optionally washing and drying the resulting coalesced product.

    Abstract translation: 一种制备聚合物组合物的方法，其包括将导电组分与含有聚合物的阴离子聚合物胶乳混合; 加入阳离子表面活性剂或絮凝剂，由此导致胶乳颗粒和导电组分颗粒的聚集; 随后加入胶体稳定剂，然后加入碱以获得约7至约12的pH; 加热高于聚合物玻璃化转变温度，从而能够形成聚集的颗粒的覆盖或破裂; 进一步加热高于聚合物玻璃化转变温度，使聚合物和导电组分颗粒聚结; 并任选地洗涤和干燥所得的聚结产物。

    Toner compositions with modified polyester resins
    86.
    发明授权
    Toner compositions with modified polyester resins 失效
    改性聚酯树脂的调色剂组合物

    公开(公告)号：US5466554A

    公开(公告)日：1995-11-14

    申请号：US251430

    申请日：1994-05-31

    Applicant: Guerino G. Sacripante ,  Richard P. N. Veregin ,  Maria N. V. McDougall

    Inventor： Guerino G. Sacripante ,  Richard P. N. Veregin ,  Maria N. V. McDougall

    IPC: G03G9/087 ,  G03G9/097

    CPC classification number: G03G9/08791 ,  G03G9/08755

    Abstract: A toner composition comprised of pigment, an optional charge enhancing additive, optional wax, and a polyester resin containing a hydrophobic end group, which polyester is free of acid end groups and is of the formula ##STR1## wherein R is an alkyl group, an alkyloxylated bisphenol, or a cyclohexyl; R' is an aryl group, an olefinic group, or an alkyl group; X is a silane, a siloxane, or a halogenated hydrocarbon; and n represents the number of segments.

    Abstract translation: 由颜料，任选的电荷增强添加剂，任选的蜡和含有疏水性端基的聚酯树脂组成的调色剂组合物，该聚酯不含酸端基并具有式I或II，其中R 是烷基，烷氧基化双酚或环己基; R'是芳基，烯基或烷基; X是硅烷，硅氧烷或卤代烃; n表示段数。

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