| 摘要 |
PURPOSE:To efficiently provide electrostatic chargeability to a titled toner by dispersing and dissolving coloring resin particles and radical polymerizable monomer having a charge controllable functional group or a combination of such monomer and other monomers into a reaction medium which dissolves the monomer but does not dissolve the formed polymer thereof, thereby subjecting the same to a radical polymn. CONSTITUTION:This toner for electrophotography is provided with a layer consisting of the polymer of the monomer (A) having the charge controllable functional group or the layer consisting of the copolymer of the monomer (A) and the resin constituting monomer for fixing or the monomer (B) having swellability with the resin for fixing in a chemically or physically bound state on the surface of the core consisting of the compsn. composed of the resin for fixing and the coloring agent dispersed into the resin. The monomer (A) for charge controlling is selectively incorporated only into the surface of the toner particles and therefore, the charge controlling effect and electrostatic chargeability lending effect are effectively obtd. with such toner with the amt. considerably less than the conventional toner. In actuality, the satisfactory chargeability is obtd. simply by using the monomer (A) at 0.1-5wt% per coloring resin. |
