TONER CONTAINING AMPHIPHILIC COPOLYMER FOR DRY ELECTROPHOTOGRAPHY, PREPARATION METHOD THEREOF AND ELECTROPHOTOGRAPHIC IMAGING METHOD USING THE TONER

摘要

PURPOSE: A toner particle for dry electrophotography, its preparation method and an electrophotographic imaging method using the toner particle are provided, to obtain a toner having uniform diameter, charge velocity and/or charge maintenance property by using an amphiphilic copolymer containing polymerizable crystallizable compounds. CONSTITUTION: The toner particle comprises an amphiphilic copolymer which contains at least one polymerizable crystallizable compound (PCC) and comprises at least one S part and at least one D part; and optionally a charge control agent. The charge control agent imparts a (+) polarity to the toner particle. Preferably the amphiphilic copolymer has a glass transition temperature of 0-100 deg.C, and the S part and the D part have a glass transition temperature (calculated by the Fox equation) of 0 or more and 60-105 deg.C, respectively. Preferably at least one of the D part or the S part contains at least PCC. The preparation method comprises the steps of providing an organosol containing a plurality of binder particles which are dispersed in a substantially nonaqueous liquid carrier and contain at least one amphiphilic copolymer; and mixing the binder particles with a plurality of toner particles for dry electrophotography.