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11.发明授权公开(公告)号：US12202788B2
公开(公告)日：2025-01-21
申请号：US17946001
申请日：2022-09-15
Applicant: XEROX CORPORATION
Inventor： Valerie M. Farrugia , Shivanthi Easwari Sriskandha , Matthew A. Heuft
IPC: C07C309/42
Abstract: A structured organic film (SOF) is disclosed. The structured organic film includes a plurality of segments, a plurality of linkers, and a plurality of capping segments. The structured organic film also includes a first surface of the SOF. The film also includes a parallel second surface of the SOF connected to the first surface by a thickness of the SOF, where a segment to capping segment ratio is greater at the first surface as compared to the parallel second surface. A membrane including a free-standing film comprised of a structured organic film is also disclosed.
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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
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.
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公开(公告)号：US11150568B2
公开(公告)日：2021-10-19
申请号：US16369126
申请日：2019-03-29
Applicant: Xerox Corporation
Inventor： Richard P. N. Veregin , Shivanthi Easwari Sriskandha , David R. Kurceba , Melanie Lynn Davis , Cuong Vong
Abstract: A toner including toner particles comprising at least one resin, in combination with an optional colorant, and an optional wax; and a copolymer toner additive on at least a portion of an external surface of the toner particles, the copolymer toner additive comprising a first monomer having a high carbon to oxygen ratio of from about 3 to about 8; and 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 60 percent by weight, based on the weight of the copolymer; wherein the copolymer toner additive has a volume average particle diameter of from about 20 nanometers to less than about 70 nanometers. An emulsion aggregation toner process including the copolymer as a toner surface additive.
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14.发明授权公开(公告)号：US10907016B2
公开(公告)日：2021-02-02
申请号：US16172493
申请日：2018-10-26
Applicant: XEROX CORPORATION
Inventor： Hajir Mokhtari , Shivanthi Easwari Sriskandha , Guerino G. Sacripante
Abstract: An organic solvent-free phase-inversion emulsification process for a low molecular weight amorphous polyester resin includes forming a mixture by adding to the amorphous polyester resin: i. a surfactant; ii. an aqueous solution of a neutralizing agent; and iii. a portion of water that is about 40% or less of a total amount of water used to form a phase-inversion emulsion, heating the mixture to dissolve the amorphous polyester resin to provide a dissolved amorphous polyester and adding water up to the total amount of water to the dissolved amorphous polyester to form a latex of the amorphous polyester resin. The resultant latex is used in processes of making a toner composition. A latex of an amorphous polyester resins is made by such processes have latex particles that are unimodal.
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公开(公告)号：US20200310268A1
公开(公告)日：2020-10-01
申请号：US16369126
申请日：2019-03-29
Applicant: Xerox Corporation
Inventor： Richard P. N. Veregin , Shivanthi Easwari Sriskandha , David R. Kurceba , Melanie Lynn Davis , Cuong Vong
Abstract: A toner including toner particles comprising at least one resin, in combination with an optional colorant, and an optional wax; and a copolymer toner additive on at least a portion of an external surface of the toner particles, the copolymer toner additive comprising a first monomer having a high carbon to oxygen ratio of from about 3 to about 8; and 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 60 percent by weight, based on the weight of the copolymer; wherein the copolymer toner additive has a volume average particle diameter of from about 20 nanometers to less than about 70 nanometers. An emulsion aggregation toner process including the copolymer as a toner surface additive.
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Patent Agency Ranking
公开(公告)号：US20200225598A1
公开(公告)日：2020-07-16
申请号：US16246898
申请日：2019-01-14
Applicant: Xerox Corporation
Inventor： Shivanthi Easwari Sriskandha , Richard P. N. Veregin , Guerino G. Sacripante , Edward G. Zwartz , Michael Steven Hawkins
Abstract: A toner process including a) mixing reagents comprising at least one amorphous resin, an optional crystalline resin, an optional styrene, acrylate or styrene/acrylate, an optional wax, and an optional colorant to form an emulsion comprising a resin particle; b) adding at least one aggregating agent and aggregating said resin particle to form a nascent toner particle; c) optionally, adding one or more resins to form a shell on said nascent toner particle to yield a core-shell particle; d) adding a first chelating agent and a second chelating agent; wherein said first chelating agent and said second chelating agent are different; e) freezing particle growth to form an aggregated toner particle; f) coalescing said aggregated toner particle to form a toner particle; and g) optionally, collecting said toner particle.
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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.
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公开(公告)号：US11884763B2
公开(公告)日：2024-01-30
申请号：US17321759
申请日：2021-05-17
Applicant: Xerox Corporation
Inventor： Shivanthi Easwari Sriskandha , Valerie M. Farrugia
IPC: C08F2/46 , C08F2/50 , C08G61/04 , C08F292/00 , B33Y70/00 , C08L51/10 , B82Y30/00 , C08K3/04 , B29K96/02 , B29K101/12 , B29K507/04
CPC classification number: C08F292/00 , B33Y70/00 , B82Y30/00 , C08K3/04 , C08L51/10 , B29K2096/02 , B29K2101/12 , B29K2507/04 , C08K2201/011 , Y10S977/742
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.
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公开(公告)号：US20220363840A1
公开(公告)日：2022-11-17
申请号：US17321823
申请日：2021-05-17
Applicant: Xerox Corporation
Inventor： Valerie M. Farrugia , Shivanthi Easwari Sriskandha
Abstract: A nonlimiting example method of forming highly spherical carbon nanomaterial-graft-polyamide (CNM-g-polyamide) polymer particles may comprising: mixing a mixture comprising: (a) carbon nanomaterial-graft-polyamide (CNM-g-polyamide), wherein the CNM-g-polyamide particles comprises: a polyamide grafted to a carbon nanomaterial, (b) a carrier fluid that is immiscible with the polyamide of the CNM-g-polyamide, 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 polyamide of the CNM-g-polyamide and the thermoplastic polymer, when included, and at a shear rate sufficiently high to disperse the CNM-g-polyamide in the carrier fluid; cooling the mixture to below the melting point or softening temperature to form CNM-g-polyamide particles; and separating the CNM-g-polyamide particles from the carrier fluid.
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公开(公告)号：US20220363800A1
公开(公告)日：2022-11-17
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 , C08L75/08
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.
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