Abstract: An image forming apparatus includes an image forming portion for forming an image on a sheet by using a developer including toner, a feeding belt for feeding the sheet, an infrared irradiating portion for irradiating, with infrared radiation, the image on the sheet fed by the feeding belt, and an ultraviolet irradiating portion for irradiating, with ultraviolet radiation, the image on the sheet having been irradiated with the infrared radiation to fix the developer on the sheet by ultraviolet radiation. In addition, a controller controls operations of the feeding belt and the infrared irradiating portion, and causes the infrared irradiating portion to irradiate the feeding belt with the infrared radiation while causing the feeding belt to rotate in a stand-by state in which the controller waits for an execution instruction of an image forming operation in a state in which the image forming operation is capable of being started.

Abstract: Provided is a toner that is excellent in heat-resistant shelf stability and low-temperature fixability, has durability, and causes less occurrence of fogging in high temperature and high humidity environments. The toner comprising at least a binder resin, a colorant, a release agent, a retention aid and a charge control resin. The binder resin is a copolymer containing a styrene-based monomer unit 67 to 78% by mass and a (meth)acrylic acid alkyl monomer unit 22 to 33% by mass. The content of the retention aid is 1 to 4 parts by mass with respect to 100 parts by mass of the binder resin, and the content of the charge control resin is 0.1 to 20 parts by mass with respect to 100 parts by mass of the binder resin.

Abstract: Provided is a toner for which the heat-resistant storability and the low-temperature fixability are able to co-exist at higher levels and for which the temporal stability of the low-temperature fixability is also excellent. The toner has a toner particle that contains a binder resin and a pigment, and this binder resin contains a polyester resin that has a specific structure and specific properties.

Abstract: Grafted triglycerides comprising an acrylated triglyceride grafted with a fatty acid residue containing 4 to 28 carbon atoms. Also described are methods for making a grafted triglyceride and for curing a material selected from vinyl esters and unsaturated polyesters and mixtures thereof and optionally a reactive diluent. The method includes the steps of mixing a grafted triglyceride of the present invention with a material selected from vinyl esters, unsaturated polyesters and mixtures thereof to form a mixture, and curing the mixture to form a cured resin system. A cured resin system comprising a cured product obtained by the foregoing method and composites containing the cured product and a filler or reinforcing material are also disclosed. This method also includes use of the grafted triglycerides to make toughened resin and composite systems with reduced hazardous air pollutants without significantly reducing the glass transition temperature and significantly increasing the viscosity.

Abstract: An object of the present invention is to provide a toner that produces an excellent bending resistance in the output image and that also exhibits an excellent low-temperature fixability and an excellent storage stability. This toner includes a binder resin and a thermoplastic elastomer having a crystalline part, wherein the binder resin and the thermoplastic elastomer in the toner are compatible with each other and the toner has a crystalline part originating from the thermoplastic elastomer.

Abstract: There are described q oligomer-polymer composition [optionally substantially free of styrene (<1.5 wt-% of copolymer)] comprising oligomer composition O having a weight average molecular weight of from 1000 to 150,000 g/mol (measured by GPC) and polymer composition P having a weight average molecular weight of at least 80,000 g/mol (measured by GPC) the oligomer composition O and the polymer composition P each independently comprising a copolymer composition comprising: (a) at least 8.5 wt-% preferably >=20 wt-% of a higher itaconate diester (preferably dibutyl itaconate—DBI); (b) less than 23 wt-% acid monomer but also sufficient to have an acid value less than 150 mg KOH/g of polymer, (c) optionally with less than 50 wt-% of other itaconate monomers, and (d) optionally less than 77 wt-% of other monomers not (a) to (c). The DBI may be biorenewable. One embodiment is an aqueous dispersion of vinyl sequential polymer of two phases: A) 40 to 90 wt-% of a vinyl polymer A with Tg from ?50 to 30° C.

Abstract: Grafted triglycerides comprising an acrylated triglyceride grafted with a fatty acid residue containing 4 to 28 carbon atoms. Also described are methods for making a grafted triglyceride and for curing a material selected from vinyl esters and unsaturated polyesters and mixtures thereof and optionally a reactive diluent. The method includes the steps of mixing a grafted triglyceride of the present invention with a material selected from vinyl esters, unsaturated polyesters and mixtures thereof to form a mixture, and curing the mixture to form a cured resin system. A cured resin system comprising a cured product obtained by the foregoing method and composites containing the cured product and a filler or reinforcing material are also disclosed. This method also includes use of the grafted triglycerides to make toughened resin and composite systems with reduced hazardous air pollutants without significantly reducing the glass transition temperature and significantly increasing the viscosity.

Abstract: A toner is provided that, even in a small amount thereof, gives a satisfactory image density and that is free of image problems, e.g., fogging and offset resistance, even during long-term use and in a high-temperature, high-humidity environment. The toner contains a binder resin, a pigment, and a prescribed azo compound wherein, designating as (A) the solubility of the azo compound in a toluene-hexane solubility test and as (B) the solubility of the binder resin constituting the toner in the toluene-hexane solubility test, the (A) and the (B) satisfy the relationship |(B)?(A)|?60.

Abstract: There is described use of a biorenewable copolymers in one or more of: in a topical and/or personal care composition, as a binder for toner, as an encapsulating agent for a colorant, as a hybrid colorant, as additive for sheet moulding compounds, as a plastic pigment, as a filler for composite materials such as concrete, as a filler for coatings and/or waxes; and/or as a spacer in a display; where the biorenewable copolymer comprises (a) at least 8. 5 wt-% preferably >=20 wt-% of a higher itaconate diester (preferably dibutyl itaconate—DBI); (b) less than 23 wt-% acid monomer but also sufficient to have an acid value less than 150 mg KOH/g of polymer, (c) optionally with less than 50 wt-% of other itaconate monomers, and (d) optionally less than 77 wt-% of other monomers not (a) to (c). The DBI may be biorenewable. One embodiment is an aqueous dispersion of vinyl sequential polymer of two phases: A) 40 to 90 wt-% of a vinyl polymer A with Tg from ?50 to 30° C.

Abstract: A positively chargeable toner for electrostatic image development according to the present disclosure is formed by aggregating at least binder resin-containing fine particles and colorant-containing fine particles in an aqueous medium in the presence of a dispersing agent and a metal ion to form fine particle aggregates and heating the fine particle aggregates to coalesce components in the fine particle aggregates. The binder resin used is a (meth)acrylic resin or styrene-(meth)acrylic resin having a certain quaternary ammonium group. The hydrophobicity (methanol wettability) is adjusted to a certain range.

Abstract: To obtain a toner which has excellent charge rise and stability, tends to have a sharp charge distribution, has excellent pigment dispersion properties, exhibits no disarray in an image even during a high-speed copying operation, and can stably output high-resolution images. A toner comprising toner particle containing a binder resin, a colorant, resin PA, and resin PB, wherein the resin PA has unit A represented by Formula (1), the resin PB has unit B represented by Formula (2), a content “a” of the unit A in the toner particle is 2.00 ?mol/g or more, and a molar ratio b/a of the content “a” and a content “b” of the unit B in the toner particle is 0.10 or more and 10.00 or less.

Abstract: Toners containing encapsulated crystalline resin have lower minimum fix temperatures without charge degradation.

Abstract: To provide a toner including: a resin particle (C) containing a first resin (a1), a second resin (a2), and a resin particle (B) to a surface of which the first resin (a1) and the second resin (a2) are attached, wherein the first resin (a1) and the second resin (a2) have mutually different glass transition temperatures, and wherein the resin particle (B) contains a third resin (b) having an amorphous polyhydroxycarboxylic acid skeleton.

Abstract: Provided is a toner exhibiting satisfactory fixability even in high-speed fixing process involving a double-sided printing mechanism, keeping stable toner image even after a conveyance step, and doesn't cause curling to a fixing roller even in thin paper. In a toner including toner particles, each of which contains polyester resins A and B, a coloring agent, and a resin composition C, the resin A includes a crystal nucleating agent bonded to a polyester molecular chain including a moiety capable of forming a crystalline structure. The resin B doesn't include a moiety capable of forming a crystalline structure. The composition C is obtained by copolymerizing a vinyl-based resin component with a polyolefin resin component. SP values the resin A, the resin B, the agent, the polyolefin component, and the vinyl-based component satisfy the particular relationships.

Abstract: A toner including a colorant, a thermoplastic resin (a) comprising an amorphous polyester resin having a main chain having a polyhydroxycarboxylic acid skeleton, and a thermoplastic resin (b) is provided. The toner is manufactured by a method including mixing the colorant with the thermoplastic resin (a) to prepare a preliminary mixture, and mixing the preliminary mixture with the thermoplastic resin (b).

Abstract: The present disclosure provides toner compositions able to prevent the formation of mold or bacterial growth during storage. In embodiments, toners may include at least one biocide that prevents the formation of mold and/or bacteria in a toner composition, including any emulsion that may be utilized in forming the toner composition. In embodiments, the biocide may also improve charging characteristics of the toner.

Abstract: A toner including a crystalline polyester resin (A), an amorphous resin (B), and a composite resin (C) having a condensation polymerization resin unit and an addition polymerization resin unit is provided. A molecular weight distribution of the toner based on THF-soluble contents thereof has a main peak within a molecular weight range from 1,000 to 10,000 and a half bandwidth of the main peak is 15,000 or less. The molecular weight distribution is determined by gel permeation chromatography. The toner includes chloroform-insoluble contents. A ratio C/R of the toner is within a range from 0.03 to 0.55. C and R represent heights of spectrum peaks specific to the crystalline polyester resin (A) and the amorphous resin (B), respectively, determined by a Fourier transform infrared spectroscopic attenuation total reflection method after the toner is stored in a thermostatic chamber at 45° C. for 12 hours.

Abstract: A toner for forming an electrophotographic image is provided, wherein the toner includes at least four types of binder resins, wherein the binder resins includes at least: a crystalline polyester resin (A); a non-crystalline resin (B); a non-crystalline resin (C); and a composite resin (D) which includes a condensation polymerization resin unit and an addition polymerization resin unit, wherein the non-crystalline resin (B) includes a chloroform insoluble matter, wherein the non-crystalline resin (C) has a softening temperature (T½) lower than that of the non-crystalline resin (B) by 25° C. or more, and wherein the toner has a main peak between 1,000 to 10,000 in a molecular weight distribution obtained by GPC from a tetrahydrofuran soluble matter, and the toner has a half-value width of the molecular weight distribution of 15,000 or less.

Abstract: Provided is a toner having an excellent low-temperature fixability and hot offset resistance, a broad fixing temperature latitude in low-temperature areas to high-temperature areas, and a high heat-resistant storage stability. The toner includes toner particles having a core-shell structure in which a shell phase containing a resin A is formed on a core containing a binder resin, a colorant and a wax. In measurement of resin A by a differential scanning calorimetry (DSC), the peak temperature TpA (° C.) of a maximum endothermic peak in the first temperature rise is at least 55° C. but not more than 80° C. In measurement of a viscoelasticity of resin A, the loss elastic modulus at TpA?10 (° C.) is at least 1×107 Pa but not more than 1×108 Pa. In measurement of the viscoelasticity of resin A, the loss elastic moduli at TpA (° C.), TpA+10 (° C.) and TpA+25 (° C.) satisfy specific conditions.

Abstract: A multicolor image forming apparatus which includes a developer image forming unit to form an image using a developer and a transferring unit to transfer the formed developer image to a recording medium, wherein the developer comprises a plurality of dark developers and one or more light developers, wherein the dark developers and the light developers each include a binder resin having a weight average molecular weight from about 50,000 Mw to about 160,000 Mw, and wherein about 50,000 Mw to about 160,000 Mw of the weight average molecular weight of the binder resin of the dark developer is larger than about 50,000 Mw to about 160,000 Mw of the weight average molecular weight of the binder resin of the light developer.

Abstract: To provide a toner including: a resin particle (C) containing a first resin (a1), a second resin (a2), and a resin particle (B) to a surface of which the first resin (a1) and the second resin (a2) are attached, wherein the first resin (a1) and the second resin (a2) have mutually different glass transition temperatures, and wherein the resin particle (B) contains a third resin (b) having an amorphous polyhydroxycarboxylic acid skeleton.

Abstract: The present invention provides dry toner particles comprising at least a radiation curable resin, and a colouring agent, wherein the circularity of the toner particles is between 0.95 and 0.99 and a charge control agent in a concentration between 0.025% and 1.0% by weight is present preferably as an external additive. The toners of this invention are useful for printing any substrate and for use in any form of printing or marking device.

Abstract: The present disclosure provides methods for incorporating a dye into latex particles via a supercritical fluid microencapsulation technique, in order to achieve improved dispersion of a colorant in the latex and an increase in color gamut.

Abstract: Toner particles are provided which may, in embodiments, include a gel. In embodiments, the toner particles may have a core-shell configuration, with the gel in the core, the shell, or both. The gel may prevent a crystalline resin in the core of the toner particles from migrating to the toner surface.

Abstract: Toner containing binder resin constituted of plural types of copolymers comprising a vinyl type polymerizing monomer, wherein at least one of the copolymers comprising a vinyl type polymerizing monomer is one formed by utilizing a monomer provided with at least two polar groups.

Abstract: Hollow toner and a process of preparing the same are provided. The hollow toner has a hollow sphere shape, wherein an outer layer surrounding the hollow sphere includes a polymer, a wax and a pigment. The hollow toner has excellent fixing properties under low energy and low pressure, and can be efficiently used at high-speed fixing. Also, a small amount of the hollow toner is consumed. Thus, the hollow toner can be efficiently applied to various apparatuses of forming an image such as a two-component low-temperature printer and super high-speed printer, and the hollow toner can be prepared by using a relatively simple process.

Abstract: The present invention provides dry toner particles comprising at least a radiation curable resin, and a colouring agent, wherein the circularity of the toner particles is between 0.95 and 0.99 and a charge control agent in a concentration between 0.025% and 1.0% by weight is present preferably as an external additive. The toners of this invention are useful for printing any substrate and for use in any form of printing or marking device.

Abstract: A method of preparing toner includes preparing a pigment dispersion solution by dispersing a pigment in a mixed surfactant solution composed of an anionic reactive surfactant and a nonionic reactive surfactant, mixing the pigment dispersion solution with a polymer latex prepared by polymerizing a toner composition comprising an amphiphilic macromonomer having at least one reactive functional group at an end thereof and at least one polymerizable monomer, and adding an inorganic salt to a mixed solution of the polymer latex and the pigment dispersion solution to be agglomerated, wherein a shape of toner particles can be controlled to have circularity of 0.5-1.0 by adjusting an amount of the nonionic reactive surfactant to be 20-100 parts by weight based on 100 parts by weight of the anionic reactive surfactant. In addition, a method of forming an image uses the toner, and an image forming apparatus to form an image employs the toner.

Abstract: Dry electrophotographic toner compositions are provided comprising an amphipathic copolymer comprising basic functionalities covalently bonded to the amphipathic copolymer. Methods of making the toner compositions are also provided. The present toner compositions exhibit unique charge characteristics and unique chemical and charge interaction properties.

Abstract: A positively chargeable toner, comprising: toner particles that are formed by allowing resin particles containing an amino-group and colorant particles to aggregate, the toner having an amine value in a range of 5 to 35 KOHmg/g, being excellent in fixing properties, heat resistant storing property and chargeability.

Abstract: The present invention relates to amphipathic copolymeric binder particles chemically grown in a substantially nonaqueous liquid carrier to form an organosol. The invention also pertains to dry particulate electrographic toners incorporating an organosol comprising an amphipathic copolymer wherein the amphipathic copolymer incorporates one or more S portions and one or more D portions. Methods of making dry electrophotographic toner particles, and methods of electrographically forming an image on a substrate using these toners, are also described. Preferably, fluidized drying techniques are used to form the dry toner particles from the organosol.

Abstract: A toner for development of an electrostatically charged image, said toner comprising a binder resin, a colorant, a function imparting agent, and a charge control agent, wherein said binder resin at least contains a polyolefin resin having a cyclic structure, said polyolefin resin is composed of a resin or resin fraction having a number average molecular weight (Mn), as measured by GPC, of less than 7,500 and a resin or resin fraction having said number average molecular weight of 7,500 or more, and in said polyolefin resin having a cyclic structure, a resin or resin fraction having an intrinsic viscosity (i.v.) of 0.25 dl/g or more, and a number average molecular weight (Mn) of 7,500 or more and a weight average molecular weight (Mw) of 15,000 or more, as measured by the GPC method, is contained in a proportion of less than 50% by weight based on the entire binder resin.

Abstract: A toner characterized by improved fixing performances with no or minimum oil application is formed of: (i) a binder resin, (ii) a colorant, (iii) a hydrocarbon wax, (iv) a resin composition formed by copolymerization of a styrenic monomer together with at least one of nitrogen-containing vinyl monomers, carboxyl group-containing monomers, hydroxyl group-containing monomers and (meth)acrylate ester monomers, in the presence of a hydrocarbon unit; and (v) an organometallic compound. The binder resin (i) comprises a polyester component in a proportion of at least 60 wt. % of the binder resin. The toner has a GPC molecular weight distribution including a weight-average molecular weight (Mw) of at least 4.0×104 an a ratio Mw/Mn of at least 50 between the Mw and a number-average molecular weight (Mn).

Abstract: The present invention relates to amphipathic copolymeric binder particles chemically grown in a substantially nonaqueous liquid carrier to form an organosol. The invention also pertains to dry particulate electrographic toners incorporating an organosol comprising an amphipathic copolymer wherein the amphipathic copolymer incorporates one or more S portions and one or more D portions. Methods of making dry electrophotographic toner particles, and methods of electrographically forming an image on a substrate using these toners, are also described. Preferably, fluidized drying techniques are used to form the dry toner particles from the organosol.

Abstract: A toner for development of an electrostatically charged image, said toner comprising a binder resin, a colorant, a function imparting agent, and a charge control agent, wherein said binder resin at least contains a polyolefin resin having a cyclic structure, said polyolefin resin is composed of a resin or resin fraction having a number average molecular weight (Mn), as measured by GPC, of less than 7,500 and a resin or resin fraction having said number average molecular weight of 7,500 or more, and in said polyolefin resin having a cyclic structure, a resin or resin fraction having an intrinsic viscosity (i.v.) of 0.25 dl/g or more, and a number average molecular weight (Mn) of 7,500 or more and a weight average molecular weight (Mw) of 15,000 or more, as measured by the GPC method, is contained in a proportion of less than 50% by weight based on the entire binder resin.

Abstract: This invention relates to toner resins that are synthesized by emulsion polymerization which exhibit good electrical charge stability, adhesion to paper, and rub-off characteristics. The toner resins of this invention are comprised of repeat units that are derived from a vinyl aromatic monomer, an acrylic monomer, and acrylonitrile. These resins are void of repeat units that are derived from acrylic acid. The toner resins of this invention also have a number average molecular weight of greater than 12,000, a weight average molecular weight of greater than 36,000, and a glass transition temperature which is within the range of about 45° C. to about 80° C. The toner resins of this invention are typically made by emulsion polymerization utilizing diacid cycloaliphatic emulsifiers to attain improved adhesion to paper, improved electrical charge stability, a high level of resistance to moisture, and resistance to moisture adsorption (adsorbed moisture is known to neutralize electrical charges).

Abstract: The present invention provides a process for the preparation of a novel toner satisfying a high resolution, a low temperature fixability and a high offset resistance at a low cost. A novel toner for the development of an electrostatic image is provided comprising an agglomerate of particles containing at least primary polymer particles, wherein said primary polymer particles substantially comprise a wax encapsulated therein.

Abstract: Urethane modified polyester resin which has a total acid value not greater than 10 KOH mg/g and has been obtained by kneading, in a molten state, a base polyester resin (A) having an acid value of 5 to 20 KOH mg/g and a hydroxyl value of 40 to 70 KOH mg/g, a low-molecular-weight polyester resin (B) having an acid value not greater than 5 KOH mg/g, a hydroxyl value not greater than 10 KOH mg/g and a weight-average molecular weight of 3,000 to 5,000 and a polyisocyanate compound, by using the components (A) and (B) at a weight ratio of 3 to 5:7 to 5 and the polyisocyanate compound in an amount of 0.2 to 1.2 equivalent, in terms of an isocyanate group per equivalent, of the total hydroxyl groups of all the resins. This novel urethane-modified polyester resin (C) is used as a binder resin for the toner. For the preparation of the toner, the resin is mixed and kneaded with a colorant, magnetic powders, charge control agent and the like under a molten state, followed by cooling and pulverization.