Abstract: A liquid developer for electrophotography or electrostatic recording is obtained by dispersing, in an insulating solvent, colored resin particles obtained according to the coacervation method from at least a pigment, pigment dispersion agent and binder resin, wherein the insulating solvent has been mixed in such a way that aliphatic hydrocarbon solvent having 11 to 12 carbon atoms accounts for 8.0 to 20.0 percent by mass, and aliphatic hydrocarbon solvent having 17 to 30 carbon atoms accounts for 2.0 to 45.0 percent by mass, and a total of these aliphatic hydrocarbon solvents having 11 to 30 carbon atoms accounts for 99 percent by mass or more, relative to the total mass of insulating solvent, and also in such a way that the viscosity of the insulating solvent at 25° C. becomes 2.0 to 10.0 mPa·s.

Abstract: An object of the present invention is to provide a liquid developer for electrophotography or electrostatic recording, demonstrating good particle uniformity, preservation stability, fixing property, and electrophoretic migration property. To achieve the aforementioned object, the present invention provides a liquid developer that contains colored resin particles granulated by utilizing the coacervation method, from at least an acid carbon black as pigment, binder resin containing acid group-containing resin, basic group-containing pigment dispersion agent, pigment dispersion aid which is an acid pigment derivative and accounts for 0.1 to 10.0 parts by mass per 100 parts by mass of the pigment, and granulating aid, wherein the colored resin particles are dispersed in an insulating solvent by means of a particle dispersion agent.

Abstract: A liquid developer for electrophotography or electrostatic recording includes colored resin particles, which are constituted by at least a pigment, a binder resin containing acid group-containing resin, a basic group-containing pigment dispersion agent, and a granulating aid, with the colored resin particles formed in an insulating solvent by utilizing the coacervation method. A carbodiimide compound having at least one carbodiimide group is used as the granulating aid, with the ratio of the number of active hydrogens in the acid group-containing resin to the number of carbodiimide groups in the carbodiimide compound adjusted to 1:0.01 or more but less than 1:1.00, and the colored resin particles are dispersed in the insulating solvent by a particle dispersion agent. The liquid developer has good uniformity, preservation stability, fixing property, and electrophoretic migration property of particles.

Abstract: The object of the present invention is to provide a liquid developing agent for electrophotography or electrostatic recording obtained by utilizing the coacervation method, wherein such liquid developing agent has good abrasion resistance. To this end, a liquid developing agent is provided which is obtained by utilizing the coacervation method, comprising insulating liquid in which colored resin particles formed by at least pigment, pigment dispersant, acid-group-containing resin, binder resin, and resin whose glass transition temperature is ?120 to ?60° C. are dispersed, wherein the resin whose glass transition temperature is ?120 to ?60° C. is contained in the colored resin particle by 1.0 to 5.0 percent by mass.

Abstract: The object of the present invention is to provide a liquid developing agent for electrophotography or electrostatic recording obtained by utilizing the coacervation method, wherein such liquid developing agent has good abrasion resistance. To this end, a liquid developing agent is provided which is obtained by utilizing the coacervation method, comprising insulating liquid in which colored resin particles formed by at least pigment, pigment dispersant, acid-group-containing resin, binder resin, and resin whose glass transition temperature is ?120 to ?60° C. are dispersed, wherein the resin whose glass transition temperature is ?120 to ?60° C. is contained in the colored resin particle by 1.0 to 5.0 percent by mass.

Abstract: The present invention provides a method for producing a liquid developer for electrophotography or electrostatic recording obtained by a coacervation method, which sufficiently maintains the charging property and has good dispersion stability of colored resin particles, as well as a liquid developer obtained by the method. A method for producing a liquid developer by a coacervation method, wherein a colored resin particle is dispersed in an insulating hydrocarbon dispersion medium in the presence of a particle dispersant and an acid group-containing resin, and the particle dispersant is a reaction product of a polyamine compound and a self-condensation product of a hydroxycarboxylic acid.

Abstract: The present invention provides a method for producing a liquid developer for electrophotography or electrostatic recording obtained by a coacervation method, which sufficiently maintains the charging property and has good dispersion stability of colored resin particles, as well as a liquid developer obtained by the method. A method for producing a liquid developer by a coacervation method, wherein a colored resin particle is dispersed in an insulating hydrocarbon dispersion medium in the presence of a particle dispersant and an acid group-containing resin, and the particle dispersant is a reaction product of a polyamine compound and a self-condensation product of a hydroxycarboxylic acid.

Abstract: It is an object of the present invention to provide a liquid developer in which in liquid developers for electrophotography or electrostatic recording obtained using the coacervation method, electric resistance of the liquid developer and the electrophoretic property or the charging characteristic of the toner particles are adequately maintained, and the dispersibility of a pigment and the dispersion stability of the toner particles are good. A liquid developer formed by dispersing colored resin particles comprising at least a pigment, a dispersant and a resin in a hydrocarbon insulating medium using a coacervation method, wherein said dispersant is a carbodiimide compound having at least one basic nitrogen-containing group and at least one polyester side chain introduced through a reaction with a carbodiimide group in its molecule, and said resin is an acid group-containing resin and the acid value of the resin is 1 to 100.

Abstract: It is an object of the present invention to provide a liquid developer in which in liquid developers for electrophotography or electrostatic recording obtained using the coacervation method, electric resistance of the liquid developer and the electrophoretic property or the charging characteristic of the toner particles are adequately maintained, and the dispersibility of a pigment and the dispersion stability of the toner particles are good. A liquid developer formed by dispersing colored resin particles comprising at least a pigment, a dispersant and a resin in a hydrocarbon insulating medium using a coacervation method, wherein said dispersant is a carbodiimide compound having at least one basic nitrogen-containing group and at least one polyester side chain introduced through a reaction with a carbodiimide group in its molecule, and said resin is an acid group-containing resin and the acid value of the resin is 1 to 100.