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    Toner process employing dual chelating agents
    3.
    发明授权
    Toner process employing dual chelating agents 有权

    公开(公告)号：US11048184B2

    公开(公告)日：2021-06-29

    申请号：US16246898

    申请日：2019-01-14

    Applicant: Xerox Corporation

    Inventor： Shivanthi Easwari Sriskandha ,  Richard P. N. Veregin ,  Guerino G. Sacripante ,  Edward G. Zwartz ,  Michael Steven Hawkins

    IPC: G03G9/08 ,  G03G9/093 ,  G03G9/097 ,  G03G15/08 ,  G03G9/087

    Abstract: A toner process including a) mixing reagents comprising at least one amorphous resin, an optional crystalline resin, an optional styrene, acrylate or styrene/acrylate, an optional wax, and an optional colorant to form an emulsion comprising a resin particle; b) adding at least one aggregating agent and aggregating said resin particle to form a nascent toner particle; c) optionally, adding one or more resins to form a shell on said nascent toner particle to yield a core-shell particle; d) adding a first chelating agent and a second chelating agent; wherein said first chelating agent and said second chelating agent are different; e) freezing particle growth to form an aggregated toner particle; f) coalescing said aggregated toner particle to form a toner particle; and g) optionally, collecting said toner particle.

    Pigmented polymer particles and methods of production and uses thereof
    6.
    发明授权
    Pigmented polymer particles and methods of production and uses thereof 有权

    公开(公告)号：US11787944B2

    公开(公告)日：2023-10-17

    申请号：US17104275

    申请日：2020-11-25

    Applicant: Xerox Corporation

    Inventor： Shivanthi Easwari Sriskandha ,  Valerie M. Farrugia ,  Richard Philip Nelson Veregin

    IPC: C08J3/21 ,  C08J3/12 ,  C08L83/04 ,  C09D183/04 ,  C08J3/20

    CPC classification number: C08L83/04 ,  C08J3/12 ,  C08J3/20 ,  C09D183/04 ,  C08J2323/12 ,  C08J2483/04

    Abstract: Pigmented polymer particles may comprise a thermoplastic polymer and a pigment, wherein at least some of the pigmented polymer particles have a morphology according to (a), (b), (c), or any combination thereof: (a) the pigment having a coating comprising the thermoplastic polymer and the coated pigment adhered to a thermoplastic polymer particle, (b) the pigment being embedded in an outer surface of the thermoplastic polymer particle, and (c) the pigment being encapsulated by the thermoplastic polymer particle. The pigmented polymer particles, especially the highly spherical pigmented polymer particles, may be useful, among other things, as starting material for additive manufacturing. For example, a method may comprise: depositing, upon a surface, the foregoing pigmented polymer particles optionally in combination with other thermoplastic polymer particles; and once deposited, heating at least a portion of the particles to promote consolidation thereof and form a consolidated body.

    NANOPARTICLE-COATED ELASTOMERIC PARTICULATES AND SURFACTANT-PROMOTED METHODS FOR PRODUCTION AND USE THEREOF
    8.
    发明申请
    NANOPARTICLE-COATED ELASTOMERIC PARTICULATES AND SURFACTANT-PROMOTED METHODS FOR PRODUCTION AND USE THEREOF 有权

    公开(公告)号：US20210070988A1

    公开(公告)日：2021-03-11

    申请号：US16946625

    申请日：2020-06-30

    Applicant: Xerox Corporation

    Inventor： Robert Claridge ,  Cristina Resetco ,  Shivanthi Easwari Sriskandha ,  Valerie M. Farrugia ,  Edward G. Zwartz

    IPC: C08L75/04 ,  B29C64/153 ,  C08K3/36

    Abstract: Melt emulsification may be employed to form elastomeric particulates in a narrow size range when nanoparticles and a sulfonate surfactant are included as emulsion stabilizers. Such processes may comprise combining a polyurethane polymer, a sulfonate surfactant, and nanoparticles with a carrier fluid at a heating temperature at or above a melting point or softening temperature of the polyurethane polymer, applying sufficient shear to disperse the polyurethane polymer as liquefied droplets in the presence of the nanoparticles in the carrier fluid at the heating temperature, cooling the carrier fluid at least until elastomeric particulates in a solidified state form, and separating the elastomeric particulates from the carrier fluid. The polyurethane polymer defines a core and an outer surface of the elastomeric particulates, and the nanoparticles are associated with the outer surface. The elastomeric particulates may have a span of about 0.9 or less.

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