利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

19 条记录 (耗时 0.013 秒)

    Color-changing particulate compositions for additive manufacturing and methods associated therewith
    1.
    发明授权
    Color-changing particulate compositions for additive manufacturing and methods associated therewith 有权

    公开(公告)号：US11453796B2

    公开(公告)日：2022-09-27

    申请号：US17082407

    申请日：2020-10-28

    申请人： Xerox Corporation

    发明人： Cristina Resetco

    IPC分类号： C08F2/46 ,  C08F2/50 ,  C08G61/04 ,  C09D11/50 ,  B33Y70/00 ,  B33Y80/00 ,  B29C64/153 ,  C09B69/10 ,  C09D11/037 ,  C09D11/101 ,  C09D11/102 ,  C09K9/02 ,  B29K9/00 ,  B29K105/00

    摘要： Additive manufacturing processes, such as powder bed fusion of thermoplastic particulates, may be employed to form printed objects in a range of shapes. Formation of printed objects having various colors may sometimes be desirable. Thermoplastic particulates incorporating a color-changing material capable of forming different colors under specified activation conditions may impart different colors to a printed object. Such particulate compositions may comprise a plurality of thermoplastic particulates comprising a thermoplastic polymer and a color-changing material associated with the thermoplastic particulates, wherein the color-changing material is photochromic and thermochromic. Conjugated diynes, such as 10,12-pentacosadiynoic acid or a derivative thereof, may be particularly suitable color-changing materials having photochromic and thermochromic properties for forming a range of colors upon a printed object. Nanoparticles, particularly silica nanoparticles, associated with an outer surface of the thermoplastic particulates may enhance the brightness of the color obtained under various activation conditions and afford coloration permanence.

    NANOPARTICLE-COATED ELASTOMERIC PARTICULATES AND SURFACTANT-PROMOTED METHODS FOR PRODUCTION AND USE THEREOF
    2.
    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

    申请人： Xerox Corporation

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

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

    摘要： 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.

    Thermochromic dye compositions and method for preparing same
    10.
    发明授权
    Thermochromic dye compositions and method for preparing same 有权

    公开(公告)号：US11524515B2

    公开(公告)日：2022-12-13

    申请号：US16376261

    申请日：2019-04-05

    申请人： Xerox Corporation

    发明人： Cristina Resetco ,  Kentaro Morimitsu

    IPC分类号： B41M5/28 ,  B41M5/333 ,  B41M5/337 ,  B41M5/323

    摘要： A thermochromic composition including a dye molecule; a matrix, wherein the matrix comprises a material having a defined melting point; and an optional developer. A process for preparing a thermochromic composition, including providing a dye; heating a matrix above its melting point; adding the heated matrix to the dye until the dye dissolves in the matrix; optionally, adding a developer; wherein the thermochromic composition exhibits a first color at a first temperature and a second color at a second temperature; wherein the first color and the second color are different; and wherein the first temperature and the second temperature are different.