Xerox Corporation

Richard Philip Nelson Veregin

Nan-Xing Hu

Kimberly D Nosella

Guerino G Sacripante

Cuong Vong

Raysa Rodriguez Diaz

Melanie Lynn Davis

Karen Ann Moffat

Yulin Wang

Valerie M Farrugia

Jennifer Lynne Belelie

Ke Zhou

Sandra J Gardner

Majid Kasmaei Kamel

Mark R Elliott

Robert P Loce

Naveen Chopra

Edward Graham Zwartz

Edul N Dalal

Dale Robert Mashtare

Kentaro Morimitsu

John F Knapp

Shigang S Qiu

William J Nowak

Martin Edward Banton

John Stephen Facci

Michael John Martin

Eric Rotberg

Christopher M Wolfe

Shivanthi Easwari Sriskandha

Thomas C Hollar

Robert Claridge

Abdisamed Sheik-Qasim

Jay Lee Schneider

Cristina Resetco

Rashid Mahmood

Randy Pheav Tin

Steve P Hoover

Paul W Morehouse

Abdisamed Sheik Qasim

Additive manufacturing processes featuring consolidation of thermoplastic particulates may form printed objects in a range of shapes. Inorganic nanoparticles disposed upon the outer surface of the thermoplastic particulates may improve flow performance of the thermoplastic particulates during additive manufacturing, but may be undesirable to incorporate in some printed objects. Polymer nanoparticles may be substituted for inorganic nanoparticles in some instances to address this difficulty and provide other advantages. Particulate compositions suitable for additive manufacturing may comprise: a plurality of thermoplastic particulates comprising a thermoplastic polymer and a plurality of polymer nanoparticles disposed upon an outer surface of the thermoplastic particulates, the polymer nanoparticles comprising a crosslinked fluorinated polymer.

Thermoplastic particulates coated with polymer nanoparticles and methods for production and use thereof

When making parts by additive manufacturing, particularly by fused filament fabrication, it is sometimes necessary to include a removable support during part fabrication due to the shape of the part. An overhang, for instance, may be fabricated using a support structure, which is subsequently eliminated following polymer matrix consolidation. Elimination of a removable support following part fabrication may be problematic in some instances. Polymer filaments suitable for forming removable supports during additive manufacturing may comprise at least one imide polymer having at least partial solubility in aqueous fluids. Imide polymers may include, for example, polyimides and polyesterimides. Additive manufacturing processes may comprise forming a supported part by depositing a build material and a removable support comprising an imide polymer, wherein at least a portion of the build material is deposited upon the removable support. An unsupported part may be formed following exposure of the supported part to an aqueous fluid.

Polymer filaments comprising an aqueous-soluble imide polymer and use thereof as a sacrificial printing material in additive manufacturing

Disclosed herein is a toner composition, developer and additive for a toner composition. The toner composition includes toner particles having at least one resin, an optional colorant, an optional wax, and a crosslinked polymer particle on at least a portion of an external surface of the toner particles. The crosslinked polymeric particle on a surface of the toner particles includes at least a hydrophobic monomer comprising a non-fluorinated monomer having a carbon to oxygen (C/O) ratio of 3 or greater or a fluorinated monomer. The crosslinked polymer particle includes a second monomer comprising two or more vinyl groups present in an amount from about 8 wt % to about 40 wt % of the copolymer, a metal oxide and optionally a charge control agent monomer.

Toner compositions and additives

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.

Pigmented polymer particles and methods of production and uses thereof

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.

Thermoplastic particulates comprising a carboxylic acid-based sintering aid and additive manufacturing therewith

Disclosed herein is a toner composition, developer and additive for a toner composition. The toner composition includes toner particles including at least one resin, an optional colorant, an optional wax, and a polymeric toner additive on at least a portion of an external surface of the toner particles. The polymeric toner additive includes a polymeric resin including a fluorinated monomer, wherein the polymeric resin is less than 10% by weight crosslinked, and optionally a charge control agent comprising nitrogen containing group at 0.1 wt % to 1.5 wt % of the polymeric resin.

Disclosed herein is a toner composition, developer and additive for a toner composition. The toner composition includes toner particles including at least one resin, an optional colorant, an optional wax, and a polymeric toner additive on at least a portion of an external surface of the toner particles. The polymeric toner additive includes a polymeric resin including a fluorinated acrylic monomer, a cross-linkable monomer containing two or more vinyl groups at 8 wt % to 40 wt % of the polymeric resin, and optionally a charge control agent comprised of a nitrogen containing group at 0.1 wt % to 1.5 wt % of the polymeric resin.

A cold pressure fix toner composition includes at least one Cto Ccrystalline organic material having a melting point in a range from about 30&#xb0; C. to about 130&#xb0; C. and at least one Cto Camorphous organic material having a Tg of from about &#x2212;30&#xb0; C. to about 70&#xb0; C. A method of cold pressure fix toner application includes providing the cold pressure fix toner composition, disposing the cold pressure fix toner composition on a substrate and applying pressure to the disposed composition on the substrate under cold pressure fixing conditions. The cold pressure fix toner compositions can be formed into latexes.

Cold pressure fix toner compositions based on small molecule crystalline and amorphous organic compound mixtures

Cold pressure fix toner compositions include at least one crystalline polyester having a melting point in a range from about 30&#xb0; C. to about 130&#xb0; C., a rosin acid-based polyester resin and an amorphous polyester having a Thigher than the rosin acid-based polyester. The crystalline polyester can have a melting point in a range from about 30&#xb0; C. to about 130&#xb0; C., the rosin acid-based polyester resin can have a Tin a range from about 0&#xb0; C. to about &#x2212;45&#xb0; C. and an amorphous polyester having a Tin a range from about 40&#xb0; C. to about 70&#xb0; C. The temperature difference between the rosin acid-based polyester resin and the amorphous polyester resin can be in a range from about 30&#xb0; C. to about 110&#xb0; C.

[object Object]

Disclosed herein include styrene-acrylic-based compositions containing a purine derivative antiplasticizer with particles having a core-shell type structure and methods for their preparation.

Toner compositions with antiplasticizers comprising purine derivative

A cold pressure fix toner composition includes at least one crystalline polyester material having a melting point in a range from about 30&#xb0; C. to about 130&#xb0; C. and at least one C16 to C80 amorphous organic material having a Tg of from about &#x2212;30&#xb0; C. to about 70&#xb0; C. A method of cold pressure fix toner application includes providing the cold pressure fix toner composition, disposing the cold pressure fix toner composition on a substrate, and applying pressure to the disposed composition on the substrate under cold pressure fixing conditions. A latex can be formed from the cold pressure fix toner composition.

Cold pressure fix toner compositions based on crystalline polyester and amorphous organic compound mixtures

The disclosure provides sustainable toner particles of from about 180 nm to about 250 nm in a sustainable toner composition having a hot offset temperature of from about 190&#xb0; C. to about 220&#xb0; C.

Optimized latex particle size for improved hot offset temperature for sustainable toners

A method of forming toner particles includes aggregating a mixture of a latex, a wax, and an optional pigment to form pre-toner particles, and coalescing the pre-toner particles at a substantially constant target temperature selected within a range from about the glass transition temperature of the pre-toner particles to about 75&#xb0; C., thereby creating toner particles having a substantially constant particle size distribution during the coalescing step.

Toner process comprising reduced coalescence temperature

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Mississauga, Canada

Richard Philip Nelson Veregin