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公开(公告)号：CA3091718C
公开(公告)日：2023-09-26
申请号：CA3091718
申请日：2020-08-31
Applicant: XEROX CORP
Inventor： FARRUGIA VALERIE M , RESETCO CHRISTINA , HAWKINS MICHAEL S , SRISKANDHA SHIVANTHI EASWARI , CLARIDGE ROBERT , MOORLAG CAROLYN PATRICIA , BIRAU MILHAELA MARIA
Abstract: A method for producing highly spherical polymer particles comprising a polyamide haying 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.
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公开(公告)号：CA3158076A1
公开(公告)日：2022-11-17
申请号：CA3158076
申请日：2022-05-09
Applicant: XEROX CORP
Inventor： CLARIDGE ROBERT , FARRUGIA VALERIE M , SRISKANDHA SHIVANTHI EASWARI
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：CA3077032C
公开(公告)日：2022-07-19
申请号：CA3077032
申请日：2020-03-25
Applicant: XEROX CORP
Inventor： CLARIDGE ROBERT , CHOPRA NAVEEN , ABRAHAM BIBY ESTHER
IPC: C09D11/101 , B41F7/00 , B41F31/18
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.
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公开(公告)号：CA3091837C
公开(公告)日：2022-06-21
申请号：CA3091837
申请日：2020-09-01
Applicant: XEROX CORP
Inventor： FARRUGIA VALERIE M , RESETCO CRISTINA , HAWKINS MICHAEL S , SRISKANDHA SHIVANTHI EASWARI , CLARIDGE ROBERT , MOORLAG CAROLYN PATRICIA , MOFFAT KAREN A
Abstract: A nonlimiting example method of forming polyamide polymer particles having pigments therein may comprising: mixing a mixture comprising a polyamide having a pigment pendent from a backbone of the polyamide (PP-polyamide), a carrier fluid that is immiscible with the PP-polyamide, and optionally an emulsion stabilizer at a temperature greater than a melting point or softening temperature of the PP-polyamide and at a shear rate sufficiently high to disperse the PP-polyamide in the carrier fluid; and cooling the mixture to below the melting point or softening temperature of the PP-polyamide to form solidified particles comprising the PP-polyamide and, when present, the emulsion stabilizer associated with an outer surface of the solidified particles. Said solidified particles may be used in additive manufacturing to make a variety of objects like containers, toys, furniture parts and decorative home goods, plastic gears, automotive parts, medical items, and the like.
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公开(公告)号：CA3091828C
公开(公告)日：2023-01-03
申请号：CA3091828
申请日：2020-09-01
Applicant: XEROX CORP
Inventor： FARRUGIA VALERIE M , RESETCO CHRISTINA , HAWKINS MICHAEL S , SRISKANDHA SHIVANTHI EASWARI , CLARIDGE ROBERT , MOORLAG CAROLYN PATRICIA , BIRAU MIHAELA MARIA
Abstract: Methods for synthesizing a polyamide having the optical absorber in the backbone of the polyamide may comprise: polymerizing polyamide monomers in the presence of an optical absorber selected from the group consisting of a polyamine optical absorber, a polyacid optical absorber, an amino acid optical absorber, and any combination thereof to yield the polyamide having the optical absorber in the backbone of the polyamide. Said polyamides having the optical absorber in the backbone of the polyamide may be useful in producing objects by methods that include melt extrusion, injection molding, compression molding, melt spinning, melt emulsification, spray drying, cryogenic milling, freeze drying polymer dispersions, and precipitation of polymer dispersions.
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Patent Agency Ranking
公开(公告)号：CA3158068A1
公开(公告)日：2022-11-17
申请号：CA3158068
申请日：2022-05-09
Applicant: XEROX CORP
Inventor： FARRUGIA VALERIE M , SRISKANDHA SHIVANTHI EASWARI , CLARIDGE ROBERT
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.
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公开(公告)号：CA3091659A1
公开(公告)日：2021-03-09
申请号：CA3091659
申请日：2020-08-31
Applicant: XEROX CORP
Inventor： CLARIDGE ROBERT , RESETCO CHRISTINA , SRISKANDHA SHIVANTHI EASWARI , FARRUGIA VALERIE , ZWARTZ EDWARD G
IPC: B29C64/153 , B33Y10/00 , B33Y70/10 , C08J7/06
Abstract: 20190368CA01 ABS TRACT Melt emulsification may be employed to form elastomeric particulates in a narrow size range when nanoparticics and a sulfonatc surfactant arc 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. 46 Date Recue/Date Received 2022-02-07
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公开(公告)号：CA3091712C
公开(公告)日：2023-09-26
申请号：CA3091712
申请日：2020-08-31
Applicant: XEROX CORP
Inventor： FARRUGIA VALERIE M , RESETCO CHRISTINA , HAWKINS MICHAEL S , SRISKANDHA SHIVANTHI EASWARI , CLARIDGE ROBERT , MOORLAG CAROLYN PATRICIA , BIRAU MIHAELA
Abstract: Methods for producing a polyamide having an optical absorber pendent from the polyamide's backbone (OAMB-polyamide) may comprise: esterifying a hydroxyl-pendent optical absorber with a halogen-terminal aliphatic acid to yield a halogen-terminal alkyl- optical absorber; and N-alkylating a polyamide with the halogen-terminal alkyl-optical absorber to yield the OAMB- polyamide. Other methods for producing an OAMB-polyamide may comprise: esterifying a carboxyl-pendent optical absorber with a halogen-terminal aliphatic alcohol to yield a halogen- terminal alkyl-optical absorber; and N-alkylating a polyamide with the modified optical absorber to yield a polyamide having the OAMB-polyamide.
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公开(公告)号：CA3091831C
公开(公告)日：2022-12-06
申请号：CA3091831
申请日：2020-09-01
Applicant: XEROX CORP
Inventor： FARRUGIA VALERIE M , RESETCO CRISTINA , HAWKINS MICHAEL S , SRISKANDHA SHIVANTHI EASWARI , CLARIDGE ROBERT , MOORLAG CAROLYN PATRICIA , BIRAU MIHAELA MARIA
Abstract: A method for producing highly spherical polymer particles comprising a polyamide haying an optical absorber in a backbone of the polyamide (IBOA-polyamide) may comprise: mixing a mixture comprising the IBOA-polyamide, a carrier fluid that is immiscible with the IBOA-polyamide, and optionally an emulsion stabilizer at a temperature greater than a melting point or softening temperature of the IBOA-polyamide and at a shear rate sufficiently high to disperse the IBOA-polyamide in the carrier fluid; and cooling the mixture to below the melting point or softening temperature of the IBOA-polyamide to form particles comprising the IBOA- polyamide and the emulsion stabilizer, when present, associated with an outer surface of the particles.
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公开(公告)号：CA3091835C
公开(公告)日：2022-05-31
申请号：CA3091835
申请日：2020-09-01
Applicant: XEROX CORP
Inventor： FARRUGIA VALERIE M , RESETCO CRISTINA , HAWKINS MICHAEL S , SRISKANDHA SHIVANTHI EASWARI , CLARIDGE ROBERT , MOORLAG CAROLYN PATRICIA , MOFFAT KAREN A
Abstract: A nonlimiting example method for synthesizing a pigment-pendent polyamide (PP- polyamide) may comprise: functionalizing metal oxide particles bound to a pigment particle with a compound having an epoxy to produce a surface treated pigment having a pendent epoxy; and reacting the pendent epoxy with a polyamide to yield the PP-polyamide. Another nonlimiting example method for synthesizing a PP-polyamide may comprise: functionalizing metal oxide particles bound to a pigment particle with a silica particle having a carboxylic acid surface treatment to produce a surface treated pigment having a pendent carboxylic acid; converting the pendent carboxylic acid to a pendent acid chloride; and reacting the pendent acid chloride with a polyamide to yield the PP-polyamide. Said PP-polyamide may be useful in producing objects by methods that include melt extrusion, injection molding, compression molding, melt spinning, melt emulsification, spray drying, cryogenic milling, freeze drying polymer dispersions, and precipitation of polymer dispersions.
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