| 摘要 |
PURPOSE:To enhance blackness and coloring degrees of a toner and to form an image high in density by dispersing a specified carbon black perfectly uniformly into a fixing resin medium in fine particles. CONSTITUTION:The toner is prepared by suspending a composition consisting of a radically polymerizable monomer and a carbon black having a specific surface area of <=300m<2>/g and a pH of <=7.0 treated with an aluminum coupling agent, in an aqueous medium, and polymerizing it in the presence of a radical polymerization initiator, and separating spherical particles consisting of a fixing resin produced by the polymerization of the monomer and the carbon black dispersed into the resin, thus permitting the obtained toner to be superior in fluidity, blackness, and coloring power to be produced at good yield during the polymerization step of the fixing resin. |
