PURPOSE: To improve the fixability of a toner by melting and mixing a specific acrylic resin having a thermosetting functional group, crosslinking agent, coloring agent, charge control agent, and other necessary additives.
CONSTITUTION: The acrylic resin having the thermosetting functional group, ≥40°C Tg and 3,000W30,000 number average mol.wt., the crosslinking agent, the coloring agent, the charge control agent and the other necessary additives are melted, mixed, ground and classified. For example, a melamine resin, urea resin, amino compd., phenolic resin, polycarboxylic acid or the anhydrides thereof which make substantially no reaction with the acrylic group at the time of producing and storing the toner are selected for a glycidyl group, block isocyanate is selected for a hydroxyl group and an epoxy resin is selected for a carboxyl group as the crosslinking agent. The fixability of the toner is thereby improved.
NAITO OKO
KUMANO ISAO
KUZUMI KENICHI
IKEDA AKIRA
