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    Seeded emulsion polymerization process for latexes and aqueous inkjet ink compositions made therefrom
    11.
    发明授权
    Seeded emulsion polymerization process for latexes and aqueous inkjet ink compositions made therefrom 有权

    公开(公告)号：US11643540B2

    公开(公告)日：2023-05-09

    申请号：US17329357

    申请日：2021-05-25

    Applicant: Xerox Corporation

    Inventor： Chunliang Lu ,  Valerie Kuykendall ,  Chieh-Min Cheng

    IPC: C08L25/14

    CPC classification number: C08L25/14 ,  C08L2205/03

    Abstract: Methods for forming latexes are provided. In embodiments, such a method comprises adding a first portion of a monomer emulsion comprising water, a monomer, an acidic monomer, a multifunctional monomer, and a first reactive surfactant to a reactive surfactant solution comprising water and a second reactive surfactant to form a reaction mixture, wherein the reactive surfactant solution does not comprise monomers other than the second reactive surfactant; adding a first portion of an initiator solution to the reaction mixture so that monomers undergo polymerization reactions to form resin seeds in the reaction mixture; adding a second portion of the monomer emulsion to the reaction mixture comprising the resin seeds; and adding a second portion of the initiator solution to the reaction mixture to form a latex comprising resin particles.

    Fluorescent green toners with enhanced brightness
    13.
    发明授权
    Fluorescent green toners with enhanced brightness 有权

    公开(公告)号：US11209741B2

    公开(公告)日：2021-12-28

    申请号：US16822531

    申请日：2020-03-18

    Applicant: Xerox Corporation

    Inventor： Chunliang Lu ,  Yu Qi ,  Peter V. Nguyen ,  Eliud Robles-Flores ,  Chieh-Min Cheng

    IPC: G03G9/093 ,  G03G9/09 ,  G03G9/08

    Abstract: Fluorescent green toners are provided. In embodiments, a fluorescent green toner comprises fluorescent agent-incorporated resin particles comprising a resin, a fluorescence brightener, and a yellow fluorescent agent having an absorption spectrum that overlaps with a fluorescence emission spectrum of the fluorescence brightener; and a cyan colorant; blue dye-incorporated resin particles comprising the resin and a blue dye; or both. The fluorescent green toner has a weight ratio of the yellow fluorescent agent to the cyan colorant and, if present, the blue dye, in a range of from 100:1 to 0.2:1, and the fluorescent green toner exhibits Förster Resonance Energy Transfer (FRET) under illumination with UV light. Methods of making and using the fluorescent green toners are also provided.

    Fluorescent metallic toners and related methods
    14.
    发明授权
    Fluorescent metallic toners and related methods 有权

    公开(公告)号：US11199787B2

    公开(公告)日：2021-12-14

    申请号：US16822263

    申请日：2020-03-18

    Applicant: Xerox Corporation

    Inventor： Yu Qi ,  Jaclyn Janis ,  Judith Vandewinckel ,  Chunliang Lu

    IPC: G03G9/093 ,  G03G9/08

    Abstract: Methods of making fluorescent metallic toners are provided which comprise forming one or more fluorescent latexes which comprise a fluorescent agent, a first type of amorphous resin, and a second type of amorphous resin, wherein the first and second types of amorphous resins are present at a ratio in a range of from 2:3 to 3:2; forming a mixture comprising the one or more fluorescent latexes; a dispersion comprising aluminum flakes and a surfactant; one or more emulsions which comprise a crystalline resin, the first type of amorphous resin, the second type of amorphous resin; and optionally, a wax dispersion; aggregating the mixture to form particles of a predetermined size; forming a shell over the particles of the predetermined size to form core-shell particles; and coalescing the core-shell particles to form a fluorescent metallic toner. Fluorescent metallic toners and methods of using such toners are also provided.

    FLUORESCENT LATEXES WITH ENHANCED BRIGHTNESS
    15.
    发明申请
    FLUORESCENT LATEXES WITH ENHANCED BRIGHTNESS 有权

    公开(公告)号：US20210294236A1

    公开(公告)日：2021-09-23

    申请号：US16822310

    申请日：2020-03-18

    Applicant: Xerox Corporation

    Inventor： Chunliang Lu

    IPC: G03G9/093 ,  C08L67/02 ,  C09K11/06 ,  C09K11/02 ,  G03G15/08

    Abstract: Fluorescent latexes are provided. In embodiments, a fluorescent latex comprises water and fluorescent agent-incorporated resin particles, the particles comprising a resin and a Förster Resonance Energy Transfer (FRET) pair comprising a fluorescent brightener having a fluorescence emission spectrum and a fluorescent dye having an absorption spectrum that overlaps with the fluorescence emission spectrum of the fluorescent brightener, wherein the fluorescent latex exhibits FRET under illumination with ultraviolet (UV) light. Fluorescent toners made from the fluorescent latexes are provided. Methods of making and using the fluorescent toners are also provided.

    FLUORESCENT WHITE TONERS AND RELATED METHODS
    16.
    发明申请
    FLUORESCENT WHITE TONERS AND RELATED METHODS 有权

    公开(公告)号：US20210294231A1

    公开(公告)日：2021-09-23

    申请号：US16822104

    申请日：2020-03-18

    Applicant: Xerox Corporation

    Inventor： Yu Qi ,  Judith Vandewinckel ,  Shigeng Li ,  Chunliang Lu ,  Chieh-Min Cheng

    IPC: G03G9/09 ,  G03G9/08 ,  G03G9/093

    Abstract: Methods of making a fluorescent white toner are provided. In embodiments, such a method comprises forming one or more fluorescent latexes which comprise a fluorescent agent, a first type of amorphous resin, and a second type of amorphous resin, wherein the first and second types of amorphous resins are present at a ratio in a range of from 2:3 to 3:2; forming a mixture comprising the one or more fluorescent latexes; a dispersion comprising a white colorant and a surfactant; one or more emulsions which comprise a crystalline resin, the first type of amorphous resin, the second type of amorphous resin; and optionally, a wax dispersion; aggregating the mixture to form particles of a predetermined size; forming a shell over the particles of the predetermined size to form core-shell particles; and coalescing the core-shell particles to form a fluorescent white toner. The fluorescent white toners and methods of using such toners are also provided.

    SEEDED EMULSION POLYMERIZATION PROCESS FOR LATEXES AND AQUEOUS INKJET INK COMPOSITIONS MADE THEREFROM
    20.
    发明申请
    SEEDED EMULSION POLYMERIZATION PROCESS FOR LATEXES AND AQUEOUS INKJET INK COMPOSITIONS MADE THEREFROM 有权

    公开(公告)号：US20220380586A1

    公开(公告)日：2022-12-01

    申请号：US17329357

    申请日：2021-05-25

    Applicant: Xerox Corporation

    Inventor： Chunliang Lu ,  Valerie Kuykendall ,  Chieh-Min Cheng

    IPC: C08L25/14

    Abstract: Methods for forming latexes are provided. In embodiments, such a method comprises adding a first portion of a monomer emulsion comprising water, a monomer, an acidic monomer, a multifunctional monomer, and a first reactive surfactant to a reactive surfactant solution comprising water and a second reactive surfactant to form a reaction mixture, wherein the reactive surfactant solution does not comprise monomers other than the second reactive surfactant; adding a first portion of an initiator solution to the reaction mixture so that monomers undergo polymerization reactions to form resin seeds in the reaction mixture; adding a second portion of the monomer emulsion to the reaction mixture comprising the resin seeds; and adding a second portion of the initiator solution to the reaction mixture to form a latex comprising resin particles.

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