摘要:
A polyester resin for electrostatic image developing toner includes: two or more polyester blocks, and the polyester resin satisfying the following conditions (A) to (C): (A) an ester concentration of the polyester resin is about 0.01 or more and less than about 0.1; (B) a weight average molecular weight of the polyester resin is about 24,000 or more; and (C) a difference in SP values of at least two kinds of the two or more polyester blocks is about 0.1 to about 0.7.
摘要:
An image forming method, which comprises: forming an electrostatic latent image on a surface of a latent image supporting member; developing the electrostatic latent image formed on the surface of the latent image supporting member with a toner for developing an electrostatic latent image or an electrostatic latent image developer containing the toner and a carrier to form a toner image; transferring the toner image formed on the surface of the latent image supporting member onto a surface of a transfer receiving material; and fixing the toner image transferred onto the transfer receiving material under pressure, wherein the toner comprises a block copolymer having a crystalline polyester block and a non-crystalline polyester block, and wherein a maximum pressure applied when the image is fixed is 1 MPa or greater but not greater than 10 MPa.
摘要:
A toner for developing an electrostatic image of the present invention contains toner particles obtained by forming coagulated particles by mixing a resin particle dispersion solution containing dispersed resin particles and a coloring agent dispersion solution containing dispersed coloring agent particles and fusing the coagulated particles by heating them and is characterized in that at least the surfaces of the toner particles have a chemical structure formed by reaction with a compound having a carbodiimido group. The invention also provides a resin particle dispersion solution to be used for the production of toner.
摘要:
The invention provides a particle dispersion for an electrostatic image-developing toner containing either polycondensation resin particles, which are prepared by polycondensation of polycondensable monomers in an aqueous medium, or condensation compound particles, which are prepared by dehydration condensation of a condensable compound in an aqueous medium. The particles have a median diameter of approximately 0.05 to 2.0 μm. A dispersion containing the polycondensation resin particles is produced by dispersing resin particles, aggregating the resin particles, and coalescing the aggregated particles by heating. A dispersion containing the condensation compound particles is produced by dispersing resin particles, dispersing condensation compound particles, aggregating the resin particles and the condensation compound particles in a mixture dispersion, obtained by mixing the dispersion of the resin particles and the dispersion of the condensation compound particles, and coalescing the aggregated particles by heating.
摘要:
The present invention provides a toner for developing electrostatic latent images, including resin particles containing a crystalline polymer and an amorphous polymer, wherein the amorphous polymer and the crystalline polymer satisfy the relationship represented by the following formula (1), and a method for manufacturing the toner of the invention. The present invention also provides a developer for electrostatic latent images including the toner of the invention and a carrier; and an image forming method using the toner of the invention. Further the invention provides a method for manufacturing a dispersion of resin particles. δa−δc≧1.05[(cal/ml)1/2(25° C.)] Formula (1) In formula (1), δa represents a solubility parameter of the amorphous polymer, and δc represents a solubility parameter of the crystalline polymer.
摘要:
A resin particle liquid dispersion for an electrostatic image developing toner includes: a polycondensable resin obtained by polycondensing at least one selected from the group consisting of a polycondensable monomer, an oligomer of the polycondensable monomer and a prepolymer of the polycondensable monomer, wherein the resin particle liquid dispersion further comprises a compound having a solubility parameter of 8 or less.
摘要:
The method for manufacturing of dispersion of fine resin particles of the present invention first emulsifies or disperses a polycondensable monomer for purposed fine resin particles into an aqueous medium. At this time, additives, such as a catalyst, a surfactant, and the like, are also added into the water soluble medium, as required. By subjecting this solution to, for example, heat, or the like, polycondensation proceeds. In this polycondensation, a strong acid salt is used as a polycondensation promoter. In addition, by using the obtained dispersion of fine resin particles, an electrostatic charge image developing toner is manufactured.
摘要:
A toner for developing an electrostatic image contains at least one of an oxidation polymerizable monomer and a polymer having an ethylenically unsaturated group, and an oxidation polymerization catalyst in a form of a composite with inorganic particles, wherein a temperature T(10 Mpa) and a temperature T(1 Mpa) satisfies the following expression (1): 20° C.≦T(1 MPa)−T(10 MPa) (1) wherein, the temperature T(10 Mpa) is a temperature at which a viscosity of the toner under a pressure of 10 Mpa applied with a flow tester becomes 104 Pa·s, and the temperature T(1 Mpa) is a temperature at which a viscosity of the toner under a pressure of 1 Mpa applied with a flow tester becomes 104 Pa·s.
摘要:
An image forming method, which comprises: forming an electrostatic latent image on a surface of a latent image supporting member; developing the electrostatic latent image formed on the surface of the latent image supporting member with a toner for developing an electrostatic latent image or an electrostatic latent image developer containing the toner and a carrier to form a toner image; transferring the toner image formed on the surface of the latent image supporting member onto a surface of a transfer receiving material; and fixing the toner image transferred onto the transfer receiving material under pressure, wherein the toner comprises a block copolymer having a crystalline polyester block and a non-crystalline polyester block, and wherein a maximum pressure applied when the image is fixed is 1 MPa or greater but not greater than 10 MPa.
摘要:
A method of producing a toner for developing electrostatic charge image, the method comprising: aggregating particles containing a crystalline polyester resin, particles containing a non-crystalline polyester resin and particles of a releasing agent in an aqueous medium, so as to form aggregated particles; and heating the aggregated particles to fuse into a coalescent body, wherein at least one of the crystalline polyester resin and the non-crystalline polyester resin is obtained by polymerization at temperatures not higher than 150° C. with a Bronsted acid containing a sulfur atom as a catalyst, and wherein a first onset temperature A(° C.) of the toner and a glass transition temperature B(° C.) of the non-crystalline polyester resin as measured by differential scanning calorimeter satisfy a relation (B−A)≦10, and wherein a weight average molecular weight of the crystalline polyester resin is ½ or lower of a weight average molecular weight of the non-crystalline polyester resin.