Abstract: An endless electrophotographic member, such as a developer roller, which indicates an improved resistance to nip banding. The improvement to nip banding may be provided by the use of an organic salt within a roller surface region. The roller may provide, at a nip location, a resistive surface layer having an electrical resistance that avoids the development of nip banding and relatively dark regions on printed media.

Abstract: A fuser roll adapted to fuse toner on the surface of a recording medium is disclosed. The fuser roll includes a non-metallic core having an outer surface, and a resistive heating element covering at least a portion of the outer surface of the core. A current transmitter is provided for transmitting a current to said resistive heating element, and an insulation layer is provided for covering at least a portion of said resistive heating element. A toner release layer is provided for covering at least a portion of said insulation layer.

Abstract: The present disclosure relates to chemically processed toner that makes use of aqueous dispersions of release agent and/or pigment and solutions of a polymeric resin binder. The polymer solution may be prepared in an organic solvent wherein the organic solvent has some level of solubility in water. The polymer solution may then be combined with an aqueous dispersion of pigment and/or release agent which dispersions may include an aqueous polyelectrolyte and/or an aqueous dispersion of colloidal particles. This may be followed by agglomerating and forming particles of toner of a desired number and/or volume average particle size and/or degree of circularity.

Abstract: The present disclosure relates to an image forming component. The component may include a urethane body, comprising polydiene containing a residual double bond available for oxidation, and including a surface, wherein said double bond is oxidized. The component may also include a first conductive additive including an alkali metal salt, wherein the first conductive additive catalyzes the oxidation of the polydiene and a second conductive additive including an inert conductive additive that does not catalyze the polydiene oxidation, wherein the image forming component exhibits a surface resistivity in the range of 1.0×109 to 1.0×1012 ohm-cm, when characterized at 15.6° C. and 20% RH.

Abstract: A fuser roll adapted to fuse toner on the surface of a recording medium is disclosed. The fuser roll includes a non-metallic core having an outer surface, and a resistive heating element covering at least a portion of the outer surface of the core. A current transmitter is provided for transmitting a current to said resistive heating element, and an insulation layer is provided for covering at least a portion of said resistive heating element. A toner release layer is provided for covering at least a portion of said insulation layer.

Abstract: An endless electrophotographic member, such as a developer roller, which indicates an improved resistance to nip banding. The improvement to nip banding may be provided by the use of an organic salt within a roller surface region. The roller may provide, at a nip location, a resistive surface layer having an electrical resistance that avoids the development of nip banding and relatively dark regions on printed media.

Abstract: A method for making toner particles having reduced toner charge transfer sensitivity when used in electrophotographic printers. The method includes preparing a dispersion of pigment, a fuser release agent, and a polymeric dispersant. The polymeric dispersant has a hydrophilic polymeric segment and at least one segment selected from the group consisting of a protective colloid segment and reactive surfactant segment. The polymeric dispersant also has a weight average molecular weight ranging from about 5,000 to about 30,000 as determined by gel permeation chromatography, and a hydrophobicity ranging from about 10 to about 90 percent by weight. The dispersion is mixed with a latex binder dispersion to provide a toner mixture. The toner mixture is agglomerated while stirring the mixture at an elevated temperature to provide toner particles.

Abstract: The present disclosure relates to chemically processed toner that makes use of aqueous dispersions of release agent and/or pigment and solutions of a polymeric resin binder. The polymer solution may be prepared in an organic solvent wherein the organic solvent has some level of solubility in water. The polymer solution may then be combined with an aqueous dispersion of pigment and/or release agent which dispersions may include an aqueous polyelectrolyte and/or an aqueous dispersion of colloidal particles. This may be followed by agglomerating and forming particles of toner of a desired number and/or volume average particle size and/or degree of circularity.

Abstract: An inkjet ink composition having a binder including an aqueous dispersion of polymer particles, the polymer including, as polymerized units, (a) from 0 to 1 wt. % monoethylenically unsaturated acid monomer, based on polymer weight; and (b) monomer of the formula CH2?C(R1)—CON(R2)(R3) wherein R1?H, CH3 or C2H5 and R2 and R3 are independently selected from C1-C6 saturated alkyl and cycloalkyl groups; and wherein the total of (a) and (b) is at least 0.1 wt % monomer based on the polymer weight. The binder may be a copolymer of ethyl acrylate and acrylamide. An inkjet ink composition including the inkjet ink binder, a colorant, and a liquid medium is also provided.

Abstract: An inkjet ink composition having a binder including an aqueous dispersion of polymer particles, the polymer comprising as polymerized units from 3 to 20 wt. % monoethylenically unsaturated acid monomer, based on polymer weight, and having a glass transition temperature (Tg) in the range of from ?40° C. to 120° C., and the polymer particles having a volume average particle diameter as measured by dynamic light scattering of at least 35 nanometers greater than the weight average particle diameter as measured by capillary hydrodynamic fractionation is provided. An inkjet ink composition including the inkjet ink binder is also provided.

Abstract: A light-resistant, metal complex dye for inkjet printing comprising a substituted 8-heterocyclic azo-5-aminoquinoline of the following structural formula:

Abstract: A chemically prepared toner for electrophotographic printers and method therefor using a unique polymeric dispersant. The chemically prepared toner includes agglomerated polymeric dispersant stabilized pigment particles, a fuser release agent, a charge control agent dispersion, and a self-stabilized essentially surfactant free latex binder. The polymeric dispersant includes at least three segments, a hydrophilic polymeric segment, a hydrophobic polymeric segment, and a protective colloid or reactive surfactant segment. The weight average molecular weight range of the dispersant ranges from about 5,000 to about 30,000, and a hydrophobicity ranging from about 10 to about 90 percent by weight. The chemically prepared toner includes agglomerated toner particles have a unimodal particles size distribution with a number average particle size (N) ranging from about 5.0 to about 8.5 microns and a volume average particle size (V) ranging from about 5.0 to about 8.5 microns.

Abstract: A chemically prepared toner for electrophotographic printers and method therefor using a unique polymeric dispersant. The chemically prepared toner includes agglomerated polymeric dispersant stabilized pigment particles, a fuser release agent, a charge control agent dispersion, and a self-stabilized essentially surfactant free latex binder. The polymeric dispersant includes at least three segments, a hydrophilic polymeric segment, a hydrophobic polymeric segment, and a protective colloid or reactive surfactant segment. The weight average molecular weight range of the dispersant ranges from about 5,000 to about 30,000, and a hydrophobicity ranging from about 10 to about 90 percent by weight. The chemically prepared toner includes agglomerated toner particles have a unimodal particles size distribution with a number average particle size (N) ranging from about 5.0 to about 8.5 microns and a volume average particle size (V) ranging from about 5.0 to about 8.5 microns.

Abstract: A layered intermediate used in inkjet printing contains a release coat formed on a transfer medium in an area where an image has not been printed. The release coat is formed of polyvinyl pyrrolidone (PVP) or a PVP copolymer and at least one solvent selected from the group consisting of glycol solvents and diol solvents. A viscous coating of PVP or the PVP copolymer is formed on the transfer medium in an area where an image has been printed. A release layer formed from components in the release coat and components in the ink is formed on the viscous coating. A first ink layer is formed on the release layer of flocculated ink. A second ink layer is formed on the first ink layer, of ink that is substantially not flocculated.

Abstract: The invention relates to dispersants and inks for ink jet applications. Specifically, this invention relates to hydroxyacid free dispersants and inks made from hydroxyacid free dispersants as well as methods for removing hydroxyacids from dispersants. The removal of hydroxyacids from dispersants prior to ink formulation eliminates print head filter clogs associated with flocculation and hydroxyacid containing deposits on the filter, thereby increasing the useful life of the print head and improving print quality.

Abstract: The present invention relates to ink compositions. More particularly, the present invention relates to ink compositions comprising a colorant and a polymeric binder having a below ambient glass transition temperature, an average particle diameter above about 200 nm and an acid component ranging from about 1% to about 10% by weight of the polymeric binder. Additionally, the present invention has the novel and useful feature of resistance to both wet-rub and dry smear as well as increased highlighter resistance and decreased occurrences of maintenance problems such as clogging and kogation.

Abstract: The present invention relates to ink compositions. More particularly, the present invention relates to ink compositions comprising a colorant and a polymeric binder having a below ambient glass transition temperature, an average particle diameter above about 200 nm and an acid component ranging from about 1% to about 10% by weight of the polymeric binder. Additionally, the present invention has the novel and useful feature of resistance to both wet-rub and dry smear as well as increased highlighter resistance and decreased occurrences of maintenance problems such as clogging and kogation.

Abstract: Provided are novel black azo dyes which are useful in ink compositions, especially ink jet ink compositions. The dyes and ink compositions of the present invention exhibit a good balance of optical density, print reliability, water fastness and light fastness.

Abstract: Provided are novel black azo dyes which are useful in ink compositions, especially ink jet ink compositions. The dyes and ink compositions of the present invention exhibit a good balance of optical density, print reliability, water fastness and light fastness.

Abstract: A method of printing uses a liquid applicator to apply a coating solution ontaining polyvinyl pyrrolidone or a polyvinyl pyrrolidone copolymer to an intermediate transfer medium. An image is printed onto the intermediate transfer medium using an ink jet printing device. The coating solution contains an organic solvent, which is preferably a glycol solvent or a diol solvent. Suitable solvents include trimethylene glycol, diethylene glycol, propylene glycol, di propylene glycol, tri propylene glycol, 1,2 butane diol, 2 pyrrolidone, gamma butyrolactone and glycerol. The coating solution is applied in an amount of 0.01 to 10 mg/cm2. The coating solution may contain 0.01 to 20 wt. % of polyvinyl pyrrolidone or a polyvinyl pyrrolidone copolymer, 5-95 wt. % of an organic solvent and 5-95 wt. % water. More preferably, the coating solution contains 0.01 to 15 wt. % of polyvinyl pyrrolidone or a polyvinyl pyrrolidone copolymer, 5-95 wt. % of an organic solvent and 5-95 wt. % water.