公开(公告)号：US20220363799A1

公开(公告)日：2022-11-17

申请号：US17321759

申请日：2021-05-17

Applicant: Xerox Corporation

Inventor： Shivanthi Easwari Sriskandha ,  Valerie M. Farrugia

IPC: C08F292/00 ,  C08L51/10 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y40/10 ,  B29C64/153 ,  B29C64/314

Abstract: A nonlimiting example method of forming highly spherical carbon nanomaterial-graft-polyolefin (CNM-g-polyolefin) particles may comprising: mixing a mixture comprising: (a) a CNM-g-polyolefin comprising a polyolefin grafted to a carbon nanomaterial, (b) a carrier fluid that is immiscible with the polyolefin of the CNM-g-polyolefin, optionally (c) a thermoplastic polymer not grafted to a CNM, and optionally (d) an emulsion stabilizer at a temperature greater than a melting point or softening temperature of the polyolefin of the CNM-g-polyolefin and the thermoplastic polymer, when included, and at a shear rate sufficiently high to disperse the CNM-g-polyolefin in the carrier fluid; cooling the mixture to below the melting point or softening temperature to form the CNM-g-polyolefin particles; and separating the CNM-g-polyolefin particles from the carrier fluid.

公开(公告)号：US20220162446A1

公开(公告)日：2022-05-26

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: C08L83/04 ,  C09D183/04

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.

公开(公告)号：US11126103B2

公开(公告)日：2021-09-21

申请号：US16892967

申请日：2020-06-04

Applicant: Xerox Corporation

Inventor： Richard P. N. Veregin ,  Shivanthi Easwari Sriskandha ,  David R. Kurceba ,  Scott Edward Silver ,  Melanie Lynn Davis ,  Cuong Vong

IPC: G03G9/00 ,  G03G9/097 ,  G03G9/08 ,  G03G9/093 ,  C08K5/41 ,  C08K5/42

Abstract: A polymeric composition including a copolymer comprising a first monomer having a high carbon to oxygen ratio of from about 3 to about 8; a second monomer comprising two or more vinyl groups, wherein the second monomer is present in the copolymer in an amount of from greater than about 8 percent by weight to about 40 percent by weight, based on the weight of the copolymer; and optionally, a third monomer comprising an amine, wherein the third monomer is present in an amount of from about 0.1 percent by weight to about 1.5 percent by weight, based on the weight of the copolymer; and a surfactant, wherein the surfactant has a minimum surface tension at critical micelle concentration of less than about 30 mN/m. A toner including the copolymer as a toner surface additive. An emulsion aggregation toner process including the copolymer as a toner surface additive.