Abstract: The invention pertains, in part, to a toner composition that is suitable for developing latent electrostatic images and being comprised of substantially spherical polyester particles with a volume average diameter in the range of 2-10 microns and which contain a wax component in the interior. The invention also pertains to a method of producing the toner composition, which is characterized by encapsulating a wax within resin particles by chemical milling a polyester resin and a wax in a polar solvent and in the further presence of an evaporable processing aid.

Abstract: A toner including a thermoplastic resin; a colorant; a wax; and a crystalline polymer, wherein a DSC endothermic peak temperature of the wax or the crystalline polymer determined by subjecting the toner to a differential scanning calorimetric analysis is lower by not less than 2° C. than a DSC endothermic peak temperature thereof determined when only the wax or the crystalline polymer is subjected to the differential calorimetric analysis.

Abstract: A non-contact heat fixing toner, comprising a binder resin, a colorant, an infrared absorbing agent, a first wax and a second wax, wherein a difference (X−Y) between the maximum peak temperature (X; ° C.) in the differential thermal curve in the first wax and Tg (Y; ° C.) of the binder resin is within the range from −5 to +10° C.

Abstract: A toner for MICR comprises at least a binder resin, magnetite particles comprising a mixture of granular magnetite and acicular magnetite, and a wax, wherein a ratio by weight of said acicular magnetite in said magnetite particles is 0.1-0.5 to the granular magnetite of 1.0, said magnetite particles are contained in an amount of 15-50% by weight in the toner, said granular magnetite has residual magnetization of 5-15 emu/g and saturation magnetization of 70-95 emu/g, and said acicular magnetite has residual magnetization of 20-50 emu/g and saturation magnetization of 70-95 emu/g.

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: Disclosed is a developing agent using a binder resin including a styrene-acrylic-series resin, a crystalline polyester resin, a first wax having a melting point higher than the softening point of the crystalline polyester resin, and a second wax having a melting point lower than the softening point of the crystalline polyester resin.

Abstract: The present invention relates to a toner, comprising a binder resin, a colorant and two kinds of infrared absorbing agents, and

Abstract: An electrostatic image developing toner comprising at least a binder resin and a releasant, wherein the binder resin comprises a petroleum resin and a styrene-based copolymer or styrene-based homopolymer in an amount of 5:5 to 7:3 by weight in terms of the ratio of the petroleum resin:styrene-based copolymer or styrene-based homopolymer and has the maximum molecular weight value (PL) based on the petroleum resin in a range of from 5×102 to 2×103 and the maximum molecular weight value (PH) based on the styrene-based copolymer or styrene-based homopolymer in a range of from 1×105 to 4.5×105 in the chromatogram obtained by measuring the binder resin through gel permeation chromatography and the releasant is a wax having a melt viscosity at 140° C. of 102 mPa/s (cp) or less and is added in an amount of 1 to 7 parts by weight per 100 parts by weight of the toner.

Abstract: A method of fixing toner in a belt fixing unit having a fixing roller; a heating roller; an endless fixing belt binding the heating roller and the fixing roller under tension therebetween; a pressure roller disposed to face the fixing roller intervening the fixing belt; and a fixing heater disposed inside one of the pressure roller and the heating roller, the method of fixing includes: a step for fixing a toner image on an image fixing material by conveying the toner image on the image fixing material in between a portion of the fixing belt not touching the fixing roller and the pressure roller; featured by the toner particle being spherical having a roundness of 0.96 or more and contains a colorant and resin component containing a modified polyester resin.

Abstract: A color toner which gives a suitable image gloss and has an excellent color reproducibility, which has sufficient anti-offset properties even when a release oil is not coated on a fixing roller or is coated in only a small amount, and which has excellent transfer properties, durability, and charge stability relative to humidity is disclosed. Also, an image-forming apparatus using the color toner and a toner container filled with the color toner are disclosed. The color toner comprises a continuous phase of a resin containing a urea-modified polyester resin; and a modified resin dispersed in the continuous phase, wherein the modified resin contains a release polymer portion containing a release polymer; and a modified portion containing a plurality of vinyl monomer units, the modified portion having an average ester group concentration of 8% by weight to 30% by weight.

Abstract: A toner composition, comprising a binder resin, a wax, a copolymer and a colorant;

Abstract: A binder resin contains a polyester resin, a crystalline polyester resin, a wax having a DSC heat absorption peak temperature not higher than that of the crystalline polyester resin, and another wax having a DSC heat absorption peak temperature higher than that of the crystalline polyester resin.

Abstract: A resin composition for toners which comprises: (A) a wax composition comprising an ethylene polymer having a melt index of from 0.1 to 100 as measured at 190±0.4° C. and a paraffin wax having a melting point of from 70° C. to 120° C. or a Fisher-Tropsch wax having a melting point of from 70° C. to 120° C.; and (B) a binder resin for toners.

Abstract: A toner for developing electrostatic latent images, including a matrix of a first resin selected from polyester resins, polyol resins and mixtures thereof, a plurality of domains of a second resin dispersed in the matrix and containing a wax. The amount of the wax is 2-15% by weight based on the weight of the toner The matrix is substantially free of domains of the second resin having a maximum diameter of greater than 2.0 &mgr;m. A part of the domains containing the wax having a maximum diameter of at least 0.2 &mgr;m constitutes a part of an outer surface of the toner.

Abstract: An ester wax is obtained by a condensation reaction of carboxylic acid and alcohol; wherein the carboxylic acid contains a single kind of saturated linear monocarboxylic acid having 14 to 30 carbon atoms as a main component, and the single kind of carboxylic acid is contained in a ratio of 60 wt % or more of the entire carboxylic acid; the alcohol contains a single kind of saturated linear monohydric alcohol having 14 to 30 carbon atoms or a single kind of polyhydric alcohol having 2 to 6 hydroxyl groups and having 2 to 30 carbon atoms as a main component, and when the monohydric alcohol is the main component, the monohydric alcohol is contained in a ratio of 60 wt % or more of the entire alcohol, and when the polyhydric alcohol is the main component, the polyhydric alcohol is contained in a ratio of 80 wt % or more of the entire alcohol; and the ester wax has an acid value of 3 mgKOH/g or less, and a hydroxyl value of 5 mgKOH/g or less, and a maximum peak temperature in a differential thermal curve is in a r

Abstract: An electrostatic image dry toner composition comprising a binding resin, a colorant, a releasing agent, and two or more kinds of inorganic oxide powders having different volume average primary particle diameters. A surface of at least one kind of the inorganic oxide powders is covered with a coating material selected from the group of 1) a fatty acid metal salt, 2) a wax having a melting point of 40° C. or higher, and 3) a resin having a glass transition temperature of 40° C. or higher.

Abstract: To provide a black toner having excellent charging property and transferring property against a severe environmental change. The black toner includes toner particle containing at least a binder resin, carbon black and a releasing agent, wherein: the toner particles have a weight-average particle diameter of 3.5 to 8.0 &mgr;m; total amount of acid value and hydroxyl value of the toner is 30 to 75 mgKOH/g; average circularity of particles contained in the toner having circle-equivalent diameter of 2 &mgr;m or more is 0.915 to 0.

Abstract: A toner for developing an electrostatic latent image is provided that is excellent in releasing property upon fixing and shape controllability upon production of the toner. The toner for developing electrostatic latent image has a number average molecular weight in a range of from 10,000 to 30,000 and a ratio of a Z average molecular weight and a weight average molecular weight in a range of from 3.0 to 6.0.

Abstract: In an electrostatic charge image developing toner containing at least a fixing resin and a wax, assume that the wax is used as one type wax or a mixed system of K types (K is an integer in excess of 2) waxes, Tn (°C.) is an onset temperature of an absorbed heat quantity curve of a wax constitutive component N in a differential scanning calorimeter (DSC), and Wn (wt %) is a compound rate occupied in an overall wax, the toner that satisfies predetermined relationships among them is obtained.

Abstract: In an electrostatic charge image developing toner that contains a hydrocarbon wax whose crystallinity is less than 93%, an amount of maximum change in a quantity of charge of the toner is smaller than 20 &mgr;C/g and an amount of contamination of a carrier by the toner is less than 0.4 wt % when a developer which is formed by mixing the toner into the carrier is stirred for 24 hours at an atmospheric temperature that is lower than a glass transition point of the toner and is higher than 45 ° C.

Abstract: An electrophotographic toner containing: a fixing resin, a colorant, and wax. The wax at least contains hydrocarbon wax having a number-average molecular weight of not higher than 600, and polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 95%. A ratio of the hydrocarbon wax to the polyethylene wax is in a range of from 1:10 to 2:1. A maximum of absorption peaks in a heat-up time absorption calorie curve in a DSC curve of the toner measured by a differential scanning calorimeter is at a temperature not higher than 75° C. An onset temperature in absorption of heat is not higher than 65° C.

Abstract: A binder resin includes a first polyester resin having a high softening point Sp1, a second polyester resin having a softening point Sp2 higher than the softening point Sp1, a first wax having a melting point Mp1 higher than the softening point Sp2, and a second wax having a melting point Mp2 lower than the softening point Sp2.

Abstract: Electrostatic charge developing toner contains at least fixing resin, a coloring agent and wax. Wax having number average molecular weight of not higher than 600 is contained as a component of the wax. A volume average particle size of the toner is in a range of from 5 &mgr;m to 10 &mgr;m. Toner particles each having a particle size of not larger than 4 &mgr;m are contained by 10% or lower by number of the total number of toner particles.

Abstract: The invention provides a method for producing a toner comprising: a step of preparing a powder for production of the toner from a raw material containing a resin as a main component, a coloring agent, and a crystalline polyester having higher crystallinity than the resin as an accessory component, and a thermal conglobation step of conglobating the powder for production of the toner with heat. The invention also provides a method for producing a toner from a kneaded material obtained by kneading a raw material containing a resin and a coloring agent, wherein the resin comprises at least a first polyester resin and a second polyester resin different from the first polyester resin, and wherein when the coefficient of static friction of the first polyester resin is taken as &mgr;1, the coefficient of static friction of the second polyester resin as &mgr;2, the softening point of the first polyester resin as Ts1 (° C.) and the softening point of the second polyester resin as Ts2 (° C.

Abstract: The present invention provides an electrophotographic dry toner comprising colored resin particles with releasing agent particles dispersed in a binder resin or an electrophotographic dry toner wherein a resin coating layer obtained by the fixation and fusion of encapsulating resin particles is provided on the surface of colored resin particles with releasing agent particles dispersed in a binder. The releasing agent particles dispersed in each colored resin particle have a particle diameter distribution such that the particle diameter of releasing agent particles dispersed in the vicinity of the surface of each colored resin particle is larger than the particle diameter of releasing agent particles at a central site of the colored resin particle. Alternatively, the colored resin particle is coated with the releasing coating layer with a releasing agent layer interposed between them.

Abstract: A toner for dry developing, containing a colorant, a binder including a modified polyester, and wax particles dispersed in the binder, wherein that portion of the wax particles having a dispersion diameter of 0.1-3 &mgr;m accounts for at least 70% by number of the wax particles.

Abstract: A toner is disclosed which is composed of toner particles containing at least a binder resin, a colorant and a wax, and an external additive. The wax has, in its DSC endothermic curve, a maximum endothermic peak at 55° C. to 80° C. within the temperature range from 30° C. to 160° C., the maximum endothermic peak having a half width of from 2° C. to 7° C., and the binder resin is composed chiefly of a polyester resin. The toner has a dynamic elastic modulus from 5×102 to 1×105 dN/m2 at 140° C., and its ratio to a dynamic elastic modulus at 170° C. is from 0.05 to 50, and the toner contains 10 to 20% by weight of THF-insoluble matter A of a binder resin component after 8 hours from the start of extraction and 1 to 10% by weight of THF-insoluble matter B of the binder resin component after 24 hours from the start of extraction, the ratio of A to B, B/A, being from 0.1 to 0.8. Also disclosed is a fixing method making use of this toner.

Abstract: Coupled alcohol ethoxylates made by reacting alcohol ethoxylates with a diisocyanate have been found to improve the thermal properties of toner compositions and powder coatings. The alcohol ethoxylates have saturated linear alcohol portions of from about 20-70 carbon atom chain lengths. The diisocyanates may be aromatic diisocyanates such as toluene diisocyanate (TDI) and/or methylenediphenyl diisocyanate (MDI). Preferably, about one mole of diisocyanate is reacted with about two moles of the alcohol ethoxylates to form the coupled alcohol ethoxylates that are useful compatibilizers to improve the homogeneity of toner compositions and powder coating compositions.

Abstract: Toner particles are described containing at least one toner resin and at least one wax. The wax present in the toner particles has an average domain size of about 1 micron or less. Developer systems, two component and monocomponent, are further described as well development systems and methods for developing an electrostatic image.

Abstract: A dry toner including at least a modified polyester as a toner binder, wherein the modified polyester has a main peak in a molecular weight region of 1000 to 30000 in a molecular weight distribution as measured by GPC, contains 1 to 10% of a component having a molecular weight of at least 30000, and has an Mw/Mn ratio of not greater than 15.

Abstract: Disclosed is toner using coloring agent-containing particles including a particulate coloring agent and a particulate additive treated with mechanochemical processing.

Abstract: The present invention aims to provide a toner for electrophotography having both good image-fixing properties and good image-reproducibility and image fidelity. The toner contains a coloring agent, a binder resin, and wax. In the toner, the binder resin contains cyclized rubber, the cyclized rubber contains' cis1,4-polyisoprene at a portion excluding a cyclized portion of the cyclized rubber. The present invention also provides an image-forming process cartridge, an image-forming apparatus, an image-forming process, each of which utilizes the toner for electrophotography.

Abstract: The present invention relates to a toner for developing an electrostatic latent image comprising a colorant, a binder resin having a number-average molecular weight of 2000 to 5000 and a ratio of weight-average molecular weight/number-average molecular weight of 5 to 30, a polymer having a weight-average molecular weight of 1000 to 3000 and a ratio of weight-average molecular weight/number-average molecular weight of 2.0 or less, and a release agent.

Abstract: Coupled alcohol ethoxylates made by reacting alcohol ethoxylates with a diisocyanate have been found to improve the thermal properties of toner compositions and powder coatings. The alcohol ethoxylates have saturated linear alcohol portions of from about 20-70 carbon atom chain lengths. The diisocyanates may be aromatic diisocyanates such as toluene diisocyanate (TDI) and/or methylenediphenyl diisocyanate (MDI). Preferably, about one mole of diisocyanate is reacted with about two moles of the alcohol ethoxylates to form the coupled alcohol ethoxylates that are useful compatibilizers to improve the homogeneity of toner compositions and powder coating compositions.

Abstract: A color toner including toner particles including a colorant, a binder resin, and a wax; and an external additive including at least one of an inorganic particulate material and a particulate resin, wherein the binder resin includes a polyester resin (A) having a crystallinity and a formula (—O—CO—CR1═CR2—CO—O—(CH2)n—)m, wherein R1 and R2 independently represents a hydrocarbon, and n and m are repeating numbers; a resin (B); and a resin (C), wherein the resins (B) and (C) and the wax have an island-sea structure such that the resin (C) is present like islands in a sea of the resin (B) and the wax is substantially included in the resin (C). A toner container, an image forming method, an image forming apparatus and a process cartridge including the color toner are also provided.

Abstract: A toner for developing an electrostatic image and a process for producing the same, a developer for developing an electrostatic image, and a process for producing an image are provided. The toner contains a colorant and a binder resin, and also contains a polyolefin resin containing a polar group and having a glass transition point of 20° C. or less and a weight average molecular weight of 10,000 or more.

Abstract: A toner which includes at least a colorant and a binder including at least a cyclized polybutadiene and a trans 1,4-polybutadiene, in which the cyclized polybutadiene is mixed with the trans 1,4-polybutadiene at a temperature not lower than a melting point of the trans 1,4-polybutadiene.

Abstract: A yellow toner in which, in a spectral-distribution diagram in which the reflectance (%) is plotted as ordinate and the wavelength (nm) as abscissa, the reflectance determined for a toner in a state of powder ranges from 15% to 20% at a wavelength of 500 nm and ranges from 75% to 80% at a wavelength of 600 nm, a cyan toner in which, in the like spectral-distribution diagram, the reflectance determined for a toner in a state of powder ranges from 30% to 35% at a wavelength of 450 nm and ranges from 35% to 40% at a wavelength of 475 nm, and a magenta toner in which, in the like spectral-distribution diagram, the reflectance determined for a toner in a state of powder ranges from 5% to 10% at a wavelength of 425 nm and ranges from 65% to 70% at a wavelength of 675 nm. These color toners each contain corresponding pigments in specific combination, and promise color reproduction which can ensure the color tones of process inks.

Abstract: A toner is composed of toner particles containing a binder resin and hydrocarbon wax wherein the binder resin includes a vinyl resin having carboxyl and a vinyl resin having as a partial structure a linkage formed by the reaction of carboxyl with epoxy. Each of the acid value of tetrahydrofuran-soluble matter of the toner, the acid value of the binder resin and the hydroxyl value of the hydrocarbon wax is in a specific range, and the acid value of the binder resin and the hydroxyl value of the hydrocarbon wax fulfill a specific relationship.

Abstract: An image forming method including forming an electrostatic latent image on an electrostatic latent image bearing member; developing said electrostatic latent image employing a toner to form a toner image; transferring the toner image to a recording medium; cleaning the electrostatic latent image bearing member with a contact cleaner to collect untransferred toner as waste toner thereon and fixing the toner image transferred to the recording medium, wherein said waste toner after collection is reused in a subsequent developing step as a mixed toner comprising said collected waste toner and toner not yet used for developing the electrostatic latent image, wherein said toner comprises a binder resin, a colorant and a release agent, said binder resin having at least one peak in the region of a molecular weight from 2,000 to 50,000 and at least a peak or shoulder in the region of a molecular weight of not less than 100,000 in molecular weight distribution as measured by gel permeation chromatography, and said rele

Abstract: A toner for electrophotography fulfilling both the fixability and the void resistance at high level, and forms a high-quality image. The toner for electrophotography contains: a binder resin; and a wax component which contains: a first wax having an endothermic peak in a temperature region of 60 to 90° C., the endothermic peak occurring in the temperature-rising stage of a DSC curve determined by a differential scanning calorimeter, and having a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 1.5 or less, and substantially not containing a component having 500 Mw or less; and at least any of a second wax having an endothermic peak in a temperature region of 100 to 150° C. and the molecular weight distribution of 5 to 20; and a third wax having an endothermic peak in a temperature region of 150 to 170° C. and the molecular weight distribution of 1.1 or more.

Abstract: A toner suitable for use in electrophotography, etc., is composed of toner particles each containing a binder resin, a colorant and a wax component. The toner has a number-average particle size of 2-6 &mgr;m and a standard deviation in particle size of below 2.6 based on a number-basis distribution of circle-equivalent diameters, an average circularity of 0.970-0.995 and a standard deviation in circularity of below 0.030 based on a circularity frequency distribution, and a residual monomer content of at most 500 ppm. The toner particles have such a microtexture as to provide a particle cross section as observed through a transmission electron microscope (TEM) exhibiting a matrix of the binder resin and a particle of the wax dispersed in a discrete form in the matrix of the binder resin.

Abstract: The toner for electrophotography includes a polylactic acid type resin, a terpene-phenol copolymer, and at least one kind of wax. A melting point of at least one kind of the wax is equal to or less than a softening temperature of the terpene-phenol copolymer. It is preferable that a molar fraction of one of L-lactic acid unit and D-lactic acid unit with respect to a total lactic acid unit in the polylactic acid type resin is in the range between about 85 mol % and about 100 mol %. Also, it is preferable that the total amount of the wax in the toner is in the range between about 7-20% by weight with respect to toner particles.

Abstract: An image-forming color toner contains at least a colorant, a resin (A), a modified resin (B) and a wax (a) as a mold releasing agent, the image-forming color toner having a phase separated structure comprising the modified resin (B) as a domain in the resin (A) as a continuous phase, and wax (a) being effectively contained the modified resin (B). The modified resin (B) has a wax part containing a wax component (b), and a modified part formed of a vinyl monomer unit and an average ester group concentration of 8% by weight to 30% by weight.

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: A non-contact type non-magnetic monocomponent toner to develop electrostatic latent images and a developing apparatus using the same. The toner includes toner particles containing a binding resin and coloring agents; and an external additive powder containing silicon oxide powder that has at least two kinds of particle sizes, separate inorganic compound powder, and zinc stearate. After passing a toner layer-regulating member, the toner evenly maintains a toner amount formed on a developing roller and forms a thin toner layer.

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 for electrophotography contains a binder resin and a colorant, the toner for electrophotography has a tensile fracture strength of 10-1400 (N/m2) under 10 kg/cm2 compression, and a loose apparent density of 0.10-0.50 (g/cm3).

Abstract: A toner formed of at least a binder resin, a colorant, a charge control agent and a wax, is provided with a uniform state of dispersion of the wax and good balance of low-temperature fixability and anti-high-temperature offset characteristic, while exhibiting good developing performances over wide environmental conditions. The toner is characterized in that (a) the binder resin comprises a hybrid resin component having a polyester unit and a vinyl polymer unit, (b) the toner exhibits a loss tangent (tan &dgr;) of 1.0 at a temperature in a range of 80-160° C., and (c) the toner provides a DSC curve showing a heat-absorption peak in a temperature range of 85-130° C. on temperature increase as measured according to differential scanning calorimetry (DSC).

Abstract: Electrostatic image developing toner includes fixing resin; and wax. The wax is hydrocarbon-based wax. The wax is containing, as its constitutional components, first wax and second wax. The first wax is higher than 1.5 in ratio of weight average molecular weight (Mw) to number average molecular weight (Mn), lower than 10 mPa·s in melt viscosity at 140° C. and higher than 75% and not higher than 85% in degree of crystallinity. The second wax is not higher than 1.5 in ratio of weight average molecular weight (Mw) to number average molecular weight (Mn), lower than 10 mPa·s in melt viscosity at 140° C. and higher than 85% and not higher than 95% in degree of crystallinity.