| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner having high safeness with low content of residual bisphenol-A which is suspected an environmental hormone. SOLUTION: In the electrophotographic toner comprising at least a colorant and a binder resin as the main component, a polyol resin obtained by the reaction of (1) epoxy resin, (2) a compound having one active hydrogen in the molecule which reacts with an epoxy group, and (3) a compound having tow or more active hydrogen atoms which react with an epoxy group is used for the binder resin. The weight concentration of the unreacted bisphenol-A in the toner is≤1,000μg/g, and the epoxy equivalent is≥20,000. COPYRIGHT: (C)2004,JPO |
