公开(公告)号：EP3789434A3

公开(公告)日：2021-03-31

申请号：EP20194474.1

申请日：2020-09-03

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivanthi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia ,  MOFFAT, Karen A.

IPC分类号： C08J3/12 ,  C08J3/20 ,  C08J3/215 ,  B29C64/153

摘要： 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.

公开(公告)号：EP3789432A3

公开(公告)日：2021-03-17

申请号：EP20194471.7

申请日：2020-09-03

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivanthi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia ,  BIRAU, Mihaela Maria

IPC分类号： C08J3/12 ,  C08J3/20 ,  C08J3/215 ,  C08G69/48 ,  B29C64/153

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.

公开(公告)号：EP3789433A2

公开(公告)日：2021-03-10

申请号：EP20194473.3

申请日：2020-09-03

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivanthi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia ,  HU, Nan-Xing

IPC分类号： C08J3/12 ,  C08J3/20 ,  C08J3/215 ,  B29C64/153

摘要： Additive manufacturing processes, such as powder bed fusion of thermoplastic particulates, may be employed to form printed objects in a range of shapes. It is sometimes desirable to form conductive traces upon the surface of printed objects. Conductive traces and similar features may be introduced during additive manufacturing processes by incorporating a metal precursor in a thermoplastic printing composition, converting a portion of the metal precursor to discontinuous metal islands using laser irradiation, and performing electroless plating. Suitable printing compositions may comprise a plurality of thermoplastic particulates comprising a thermoplastic polymer, a metal precursor admixed with the thermoplastic polymer, and optionally a plurality of nanoparticles disposed upon an outer surface of each of the thermoplastic particulates, wherein the metal precursor is activatable to form metal islands upon exposure to laser irradiation. Melt emulsification may be used to form the thermoplastic particulates.

公开(公告)号：EP3789430A2

公开(公告)日：2021-03-10

申请号：EP20194451.9

申请日：2020-09-03

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivanthi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia ,  JAMALI, Hojjat Seyed

IPC分类号： C08J3/12 ,  C08J3/20 ,  C08J3/215 ,  B29C64/153

摘要： A method of producing thermoplastic particles may comprise: mixing a melt emulsion comprising (a) a continuous phase that comprises a carrier fluid having a polarity Hansen solubility parameter (dP) of about 7 MPa 0.5 or less, (b) a dispersed phase that comprises a dispersing fluid having a dP of about 8 MPa 0.5 or more, and (c) an inner phase that comprises a thermoplastic polyester at a temperature greater than a melting point or softening temperature of the thermoplastic polyester and at a shear rate sufficiently high to disperse the thermoplastic polyester in the dispersed phase; and cooling the melt emulsion to below the melting point or softening temperature of the thermoplastic polyester to form solidified particles comprising the thermoplastic polyester.

公开(公告)号：EP3812417A1

公开(公告)日：2021-04-28

申请号：EP20193750.5

申请日：2020-08-31

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivnathi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia

IPC分类号： C08J3/12 ,  B29C64/153

摘要： 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：EP3789433A3

公开(公告)日：2021-03-24

申请号：EP20194473.3

申请日：2020-09-03

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivanthi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia ,  HU, Nan-Xing

IPC分类号： C08J3/12 ,  C08J3/20 ,  C08J3/215 ,  C23C18/16 ,  C23C18/18 ,  B29C64/153

摘要： Additive manufacturing processes, such as powder bed fusion of thermoplastic particulates, may be employed to form printed objects in a range of shapes. It is sometimes desirable to form conductive traces upon the surface of printed objects. Conductive traces and similar features may be introduced during additive manufacturing processes by incorporating a metal precursor in a thermoplastic printing composition, converting a portion of the metal precursor to discontinuous metal islands using laser irradiation, and performing electroless plating. Suitable printing compositions may comprise a plurality of thermoplastic particulates comprising a thermoplastic polymer, a metal precursor admixed with the thermoplastic polymer, and optionally a plurality of nanoparticles disposed upon an outer surface of each of the thermoplastic particulates, wherein the metal precursor is activatable to form metal islands upon exposure to laser irradiation. Melt emulsification may be used to form the thermoplastic particulates.

公开(公告)号：EP3789434A2

公开(公告)日：2021-03-10

申请号：EP20194474.1

申请日：2020-09-03

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivanthi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia ,  MOFFAT, Karen A.

IPC分类号： C08J3/12 ,  C08J3/20 ,  C08J3/215 ,  B29C64/153

摘要： 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.

公开(公告)号：EP3789429A1

公开(公告)日：2021-03-10

申请号：EP20193756.2

申请日：2020-08-31

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivanthi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia ,  BIRAU, Mihaela Maria

IPC分类号： C08J3/12 ,  C08J3/20 ,  C08J3/215

摘要： Optical absorber-containing thermoplastic polymer particles (OACTP particles) may be produced by methods that comprise: mixing a mixture comprising a thermoplastic polymer, a carrier fluid that is immiscible with the thermoplastic polymer, and optionally an 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 solidified particles comprising the thermoplastic polymer; separating the solidified particles from the carrier fluid; and exposing the solidified particles to an optical absorber to produce the OACTP particles.

公开(公告)号：EP3992234A1

公开(公告)日：2022-05-04

申请号：EP21201002.9

申请日：2021-10-05

申请人： Xerox Corporation

发明人： RESETCO, Cristina

IPC分类号： C08K3/22 ,  B29C64/153 ,  C08K3/36 ,  B33Y10/00 ,  B33Y70/10 ,  B33Y80/00 ,  C08J3/12 ,  C08J7/06 ,  C08K5/09 ,  B29C64/165

摘要： Additive manufacturing processes, such as powder bed fusion of thermoplastic particulates, may be employed to form printed objects in a range of shapes. Formation of printed objects having various colors may sometimes be desirable. Thermoplastic particulates incorporating a color-changing material capable of forming different colors under specified activation conditions may impart different colors to a printed object. Such particulate compositions may comprise a plurality of thermoplastic particulates comprising a thermoplastic polymer and a color-changing material associated with the thermoplastic particulates, wherein the color-changing material is photochromic and thermochromic. Conjugated diynes, such as 10,12-pentacosadiynoic acid or a derivative thereof, may be particularly suitable color-changing materials having photochromic and thermochromic properties for forming a range of colors upon a printed object. Nanoparticles, particularly silica nanoparticles, associated with an outer surface of the thermoplastic particulates may enhance the brightness of the color obtained under various activation conditions and afford coloration permanence.

公开(公告)号：EP3792297A1

公开(公告)日：2021-03-17

申请号：EP20193758.8

申请日：2020-08-31

申请人： Xerox Corporation

发明人： FARRUGIA, Valerie M. ,  RESETCO, Cristina ,  HAWKINS, Michael S. ,  SRISKANDHA, Shivanthi Easwari ,  CLARIDGE, Robert ,  MOORLAG, Carolyn Patricia ,  BIRAU, Mihaela Maria

IPC分类号： C08G69/48 ,  C08J3/18 ,  C09B62/00

摘要： 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.