| 摘要 |
PURPOSE:To improve the environmental stability and stability with lapse of time of the electric charge of a toner by incorporating a high-polymer material having a sulfonic group bonded to an arom. ring into the titled compsn. CONSTITUTION:The high-polymer material having the sulfonic acid base bonded to the arom. ring is used in the developer compsn. prepd. by using a coloring agent and binder resin as essential components. The high-polymer material having the sulfonic acid base bonded to the arom. ring signifies the polymer having the group in which the sulfonic acid group bonded directly to the arom. ring such as benzene ring and naphthalene ring takes the form of a salt by neutralizing with a cationic component. The cation of the cationic component is exemplified by univalent or polyvalent metal cations such as Na<+>, K<+>, Li<+>, Ca<2+>, Mg<2+> and Al<3+>, ammonium ion, alkyl ammonium ion, pyridinium ion, quinolinium ion, imidazolium ion, etc. The developer compsn. having the excellent environmental stability and stability with lapse of time of the electric charge of the toner is thereby obtd. |
