公开(公告)号：US11667788B2

公开(公告)日：2023-06-06

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 ,  C08K3/36 ,  B29C64/153 ,  B33Y30/00 ,  B33Y70/00 ,  B29K75/00 ,  B82Y30/00 ,  B82Y40/00 ,  C08K5/42

CPC classification number: C08L75/04 ,  B29C64/153 ,  C08K3/36 ,  B29K2075/00 ,  B33Y30/00 ,  B33Y70/00 ,  B82Y30/00 ,  B82Y40/00 ,  C08K5/42 ,  C08K2201/005

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.

公开(公告)号：US11124663B2

公开(公告)日：2021-09-21

申请号：US16368273

申请日：2019-03-28

Applicant: XEROX CORPORATION

Inventor： Robert Claridge ,  Naveen Chopra ,  Biby Esther Abraham

IPC: C09D11/107 ,  B41M1/06 ,  C09D11/037 ,  C09D11/101 ,  C09D11/102 ,  C09D11/104 ,  B41M5/00

Abstract: An ink composition includes at least one sulfonated polyester, at least one (meth)acrylate monomer, at least one urethane acrylate oligomer, at least one photoinitiator, at least one colorant and water.

公开(公告)号：US12264214B2

公开(公告)日：2025-04-01

申请号：US17321997

申请日：2021-05-17

Applicant: Xerox Corporation

Inventor： Valerie M. Farrugia ,  Shivanthi Easwari Sriskandha ,  Robert Claridge

IPC: C08L77/00 ,  C08F292/00 ,  C08L23/00 ,  C08L75/04 ,  C08L77/06

Abstract: Highly spherical particles may comprise a thermoplastic polymer grafted to a carbon nanomaterial (CNM-g-polymer), wherein the particles have an aerated density of about 0.5 g/cm3 (preferably about 0.55 g/cm3) to about 0.8 g/cm3. Said CNM-g-polymer particles may be useful in a variety of applications including selective laser sintering additive manufacturing methods.

公开(公告)号：US20240279465A1

公开(公告)日：2024-08-22

申请号：US18637112

申请日：2024-04-16

Applicant: Xerox Corporation

Inventor： Valerie M. Farrugia ,  Cristina Resetco ,  Michael S. Hawkins ,  Shivanthi Easwari Sriskandha ,  Robert Claridge ,  Carolyn Patricia Moorlag

IPC: C08L77/06 ,  C08L23/12 ,  C08L67/03 ,  C08L75/08 ,  C08L83/04

CPC classification number: C08L77/06 ,  C08L23/12 ,  C08L67/03 ,  C08L75/08 ,  C08L83/04 ,  C08L2205/14 ,  C08L2207/02 ,  C08L2207/04

Abstract: Thermoplastic polymer particles can be produced that comprise a thermoplastic polymer and an emulsion stabilizer (e.g., nanoparticles and/or surfactant) associated with an outer surface of the particles. The nanoparticles may be embedded in the outer surface of the particles. Melt emulsification can be used to produce said particles. For example, a method may include: mixing a mixture comprising a thermoplastic polymer, an carrier fluid that is immiscible with the thermoplastic polymer, and the emulsion stabilizer at a temperature greater than a melting point or softening temperature of the thermoplastic polymer and at a shear rate sufficiently high to disperse the thermoplastic polymer in the carrier fluid; cooling the mixture to below the melting point or softening temperature of the thermoplastic polymer to form the thermoplastic polymer particles; and separating the thermoplastic polymer particles from the carrier fluid.

公开(公告)号：US20240102186A1

公开(公告)日：2024-03-28

申请号：US17934565

申请日：2022-09-22

Applicant: Xerox Corporation

Inventor： Yujie Zhu ,  Yulin Wang ,  Robert Claridge ,  Edward G. Zwartz ,  Kurt I. Halfyard ,  David Lawton

IPC: C25B11/032 ,  C25B1/23 ,  C25B11/065 ,  C25B11/089

CPC classification number: C25B11/032 ,  C25B1/23 ,  C25B11/065 ,  C25B11/089

Abstract: A composition, a gas diffusion electrode, and a method for fabricating the same is disclosed. In an example, the composition includes carbon supported carboxyl surface functionalized silver nanoparticles. The gas diffusion electrode can be fabricated with the carbon supported carboxyl surface functionalized silver nanoparticles and deployed in a membrane electrode assembly for various applications.

公开(公告)号：US11731349B2

公开(公告)日：2023-08-22

申请号：US17071255

申请日：2020-10-15

Applicant: Xerox Corporation

Inventor： Robert Claridge ,  Cristina Resetco ,  Richard Philip Nelson Veregin

IPC: B33Y70/10 ,  B29C64/153 ,  B33Y10/00 ,  B33Y80/00 ,  B29C64/314 ,  B29B9/12 ,  B29K75/00 ,  B29K101/12 ,  B29K105/00

CPC classification number: B29C64/153 ,  B29B9/12 ,  B29C64/314 ,  B33Y10/00 ,  B33Y80/00 ,  B29K2075/02 ,  B29K2101/12 ,  B29K2105/251

Abstract: Additive manufacturing processes featuring consolidation of thermoplastic particulates may form printed objects in a range of shapes. Nanoparticles disposed upon the outer surface of the thermoplastic particulates may improve flow performance of the thermoplastic particulates during additive manufacturing, but may lead to excessive porosity following consolidation. Excessive porosity may be detrimental for performance applications requiring high mechanical strength. A carboxylic acid-based sintering aid, particularly a metal carboxylate, may decrease porosity of consolidated parts following sintering without substantially increasing blocking in a powder bed. Particulate compositions suitable for additive manufacturing may comprise: a plurality of thermoplastic particulates comprising a carboxylic acid-based sintering aid admixed with a thermoplastic polymer, and a plurality of nanoparticles disposed upon an outer surface of the thermoplastic particulates.

公开(公告)号：US20230051250A1

公开(公告)日：2023-02-16

申请号：US17388861

申请日：2021-07-29

Applicant: Xerox Corporation

Inventor： Robert Claridge ,  Valerie M. Farrugia

IPC: C08K3/34 ,  B33Y10/00 ,  B33Y40/10 ,  B33Y70/00 ,  B29C64/153 ,  B29C64/314

Abstract: Methods for producing highly spherical particles that comprise: mixing a mixture comprising: (a) nanoclay-filled-polymer composite comprising a nanoclay dispersed in a thermoplastic polymer, (b) a carrier fluid that is immiscible with the thermoplastic polymer of the nanoclay-filled-polymer composite, optionally (c) a thermoplastic polymer not filled with a nanoclay, and optionally (d) an emulsion stabilizer at a temperature at or greater than a melting point or softening temperature of the thermoplastic polymer of the nanoclay-filled-polymer and the thermoplastic polymer, when included, to disperse the nanoclay-filled-polymer composite in the carrier fluid; cooling the mixture to below the melting point or softening temperature to form nanoclay-filled-polymer particles; and separating the nanoclay-filled-polymer particles from the carrier fluid.

公开(公告)号：US12258455B2

公开(公告)日：2025-03-25

申请号：US18153836

申请日：2023-01-12

Applicant: XEROX CORPORATION

Inventor： Valerie M. Farrugia ,  Robert Claridge

IPC: C08J3/09 ,  B29C71/02 ,  C08J5/18

Abstract: A method of forming a pre-cure solution for a structured organic film (SOF) is described, including contacting at least one type of segment and at least one type of pre-linker with a bio-based solvent. The method also includes dissolving the at least one type of segment and the at least one type of pre-linker within the bio-based solvent. The method also includes where the bio-based solvent has a viscosity above 0.92 MPa-s. A composition including a bio-based solvent is also disclosed.

公开(公告)号：US12157786B2

公开(公告)日：2024-12-03

申请号：US17321877

申请日：2021-05-17

Applicant: Xerox Corporation

Inventor： Robert Claridge ,  Valerie M. Farrugia ,  Shivanthi Easwari Sriskandha

IPC: C08F292/00 ,  B29C64/153 ,  B29C64/268 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y70/00 ,  B33Y70/10 ,  C08G18/10 ,  C08G18/32 ,  C08G18/40 ,  C08G18/42 ,  C08G18/48 ,  C08G18/76 ,  C08G83/00 ,  C08K3/04 ,  C08K9/08 ,  C08L75/04 ,  C08L75/08 ,  C08L101/00 ,  C08G18/24 ,  C08G18/66

Abstract: A nonlimiting example method of forming highly spherical carbon nanomaterial-graft-polyurethane (CNM-g-polyurethane) particles may comprising: mixing a mixture comprising: (a) carbon nanomaterial-graft-polyurethane (CNM-g-polyurethane), wherein the CNM-g-polyurethane particles comprises: a polyurethane grafted to a carbon nanomaterial, (b) a carrier fluid that is immiscible with the polyurethane of the CNM-g-polyurethane, 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 polyurethane of the CNM-g-polyurethane and the thermoplastic polymer, when included, and at a shear rate sufficiently high to disperse the CNM-g-polyurethane in the carrier fluid; cooling the mixture to below the melting point or softening temperature to form CNM-g-polyurethane particles; and separating the CNM-g-polyurethane particles from the carrier fluid.

公开(公告)号：US20240010855A1

公开(公告)日：2024-01-11

申请号：US17810979

申请日：2022-07-06

Applicant: Xerox Corporation

Inventor： Robert Claridge ,  Yujie Zhu ,  Yulin Wang ,  David Lawton

IPC: C09D11/037 ,  C09C3/08

CPC classification number: C09D11/037 ,  C09C3/08 ,  B82Y30/00

Abstract: Carbon supported surface functionalized silver nanoparticles and a method for preparing the same are disclosed. For example, a composition includes carbon supported surface functionalized silver nanoparticles, The methods include preparing a liquid-containing composition comprising a plurality of silver nanoparticles and adding a carbon structure with the liquid-containing composition to form the carbon supported silver nanoparticles in-situ or mixing a composition comprising a carbon structure, a plurality of silver nanoparticles, and a liquid to grow silver nanoparticles on the carbon structure in-situ.