Patent ID: 6861191
Filing Date: 2005-03-01
Classification: G03G

Abstract:
1. A dry toner for developing electrostatic images, comprising a colorant and a binder resin, wherein said binder resin comprises a copolymer resin having (a) an epoxy resin, (b) a dihydric phenol, and (c) an alkylene oxide adduct of a dihydric phenol or a glycidyl ether thereof; and wherein the weight ratio of said epoxy resin of said polyol resin moiety to said polyester resin moiety is 95:5 to 60:40, wherein said epoxy resin of said polyol resin moiety includes at least two bisphenol epoxy resins having different number-average molecular weights, and wherein said binder resin has an acid value of not greater than 5.