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    Purification of functionalized triblock copolymers via methanol trituration
    2.
    发明授权
    Purification of functionalized triblock copolymers via methanol trituration 有权
    通过甲醇研磨纯化官能化三嵌段共聚物

    公开(公告)号：US08952126B2

    公开(公告)日：2015-02-10

    申请号：US13938874

    申请日：2013-07-10

    申请人： Xerox Corporation ,  National Research Council of Canada

    发明人： Andrew J. Myles ,  Karen A. Moffat ,  Jordan H. Wosnick ,  Valerie M. Farrugia

    IPC分类号： C08F6/10 ,  C08F6/28 ,  C08F6/12 ,  C08F6/08 ,  C08G63/88 ,  C08G63/89 ,  C08G63/91

    CPC分类号： C08G63/90 ,  C08G63/64

    摘要： A method of making a pure block copolymer includes forming a crude block copolymer; heating a solution of the crude block copolymer and alcohol; and cooling the solution to promote precipitation of a purified block copolymer, wherein an amount of impurities remaining in the purified block copolymer is from about 0 to about 5 wt % based on a total weight of the purified block copolymer; a ratio of a polydispersity index of the crude block copolymer to a polydispersity index of the purified block copolymer is from about 1.02 to about 1.25; a ratio of a molecular weight of the crude block copolymer to a molecular weight of the purified block copolymer is from about 0.75 to about 1.0; and a ratio of a number average molecular weight of the crude block copolymer to a number average molecular weight of the purified block copolymer is from about 0.65 to about 1.

    摘要翻译： 制备纯嵌段共聚物的方法包括形成粗嵌段共聚物; 加热粗制嵌段共聚物和醇的溶液; 并冷却溶液以促进纯化的嵌段共聚物的沉淀，其中基于纯化的嵌段共聚物的总重量，残留在纯化的嵌段共聚物中的杂质的量为约0至约5重量％; 粗嵌段共聚物的多分散指数与纯化的嵌段共聚物的多分散指数之比为约1.02至约1.25; 粗制嵌段共聚物的分子量与纯化的嵌段共聚物的分子量的比例为约0.75至约1.0; 粗嵌段共聚物的数均分子量与纯化嵌段共聚物的数均分子量的比例为约0.65〜约1。

    PARTICLES COMPRISING POLYAMIDES WITH PENDENT OPTICAL ABSORBERS AND RELATED METHODS
    9.
    发明申请
    PARTICLES COMPRISING POLYAMIDES WITH PENDENT OPTICAL ABSORBERS AND RELATED METHODS 有权

    公开(公告)号：US20210070991A1

    公开(公告)日：2021-03-11

    申请号：US16916383

    申请日：2020-06-30

    申请人： Xerox Corporation

    发明人： Mihaela Maria Birau ,  Valerie M. Farrugia

    IPC分类号： C08L77/02 ,  C08K5/00 ,  C08K5/08 ,  C08K3/04 ,  C08K3/22 ,  C08J3/14

    摘要： A method for producing highly spherical polymer particles comprising a polyamide having an optical absorber pendent from a backbone of the polyamide (OAMB-polyamide) may comprise: mixing a mixture comprising the OAMB-polyamide, a carrier fluid that is immiscible with the OAMB-polyamide, and optionally an emulsion stabilizer at a temperature greater than a melting point or softening temperature of the OAMB-polyamide and at a shear rate sufficiently high to disperse the OAMB-polyamide in the carrier fluid; and cooling the mixture to below the melting point or softening temperature of the OAMB-polyamide to form particles comprising the OAMB-polyamide and the emulsion stabilizer, when present, associated with an outer surface of the particles.

    NANOPARTICLE-COATED ELASTOMERIC PARTICULATES AND SURFACTANT-PROMOTED METHODS FOR PRODUCTION AND USE THEREOF
    10.
    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.