Patent application number | Description | Published |
20090181318 | Liquid Developer and Image Forming Apparatus - A liquid developer includes an insulation liquid, toner particles dispersed in the insulation liquid, which at least a part of the surface of each of the toner particles contains a rosin resin and a dispersant improving dispersibility of the toner particles in the insulation liquid, which the dispersant is consisted of a material having a predetermined amine value. The liquid developer described above has superior positive charge property of toner particles and which has superior dispersibility of the toner particles for a long period of time. Further, an image forming apparatus that can suitably use such a liquid developer is also provided. | 07-16-2009 |
20090238606 | Liquid Developer and Image Forming Apparatus - A liquid developer is provided. The liquid developer comprises an insulation liquid, toner particles dispersed in the insulation liquid, a dispersant dissolved in the insulation liquid; and a charge control agent dissolved in the insulation liquid. The charge control agent is represented by the following chemical formula (I): | 09-24-2009 |
20100003054 | Process for Producing Liquid Developer, Liquid Developer, and Image Forming Apparatus - A process for producing a liquid developer includes: providing a dispersion liquid containing an aqueous dispersion medium and toner mother particles including a rosin resin; chemically modifying surfaces of the toner mother particles with an amine-based material by mixing the amine-based material with the dispersion liquid to obtain toner particles; and dispersing the toner particles in an insulating liquid. | 01-07-2010 |
20100014894 | Liquid Developer and Image Forming Apparatus - A liquid developer includes an insulating liquid and toner particles obtained by surface-modifying toner mother particles made of a material containing a rosin resin with a polyalkyleneimine. | 01-21-2010 |
20100015543 | Black Toner and Image Forming Method - A black toner includes: toner mother particles containing carbon black as a colorant and a binder resin, the toner mother particles being surface-modified with a polyalkyleneimine. | 01-21-2010 |
20100015546 | Process for Producing Toner for Liquid Developer, Toner for Liquid Developer, Process for Producing Liquid Developer, Liquid Developer, and Image Forming Apparatus - A process for producing a toner for a liquid developer includes: preparing an emulsion liquid containing an aqueous dispersion medium and, dispersed therein, dispersoids containing a resin material which has an acidic group having a salt structure formed with a basic substance and has an acid value of from 5.0 to 20 mg KOH/mg when it is in a form of an acidic substance without forming a salt with the basic substance, a colorant and an organic solvent which dissolves the resin material; coalescing the dispersoids contained in the emulsion liquid to obtain coalescent particles; removing the organic solvent contained in the coalescent particles to obtain colored resin particles; washing the colored resin particles with an aqueous liquid (first washing step); dispersing the washed colored resin particles in an aqueous liquid and performing an acid treatment to obtain an acidic dispersion liquid having a hydrogen ion exponent (pH) adjusted to 3.0 to 6.0; washing the colored resin particles subjected to the acid treatment with an aqueous liquid (second washing step); and drying the colored resin particles subjected to the second washing step. | 01-21-2010 |
20100248128 | LIQUID DEVELOPER AND IMAGE FORMING METHOD - Provided is a liquid developer containing toner particles and an insulating liquid containing a hydrogen modified silicon compound. | 09-30-2010 |
20110045400 | LIQUID DEVELOPER AND IMAGE-FORMING APPARATUS - A liquid developer contains toner, a carrier liquid in which the toner are dispersed, and a graft copolymer of an acrylic polymer and a polysiloxane. | 02-24-2011 |