| 摘要 |
PURPOSE:To obtain a toner which obviates an offset phenomenon and staining phenomenon on the rear side in a contact heating and fixing system and has excellent developing, transferring and fixing properties by using a resin contg. an isocyanate group precursor and a functional group that can react with the isocyanate group. CONSTITUTION:A toner contg. a pigment, such as carbon black, and necessary additives in a copolymer resin of a compd. expressed by the formulas I , II (A<1>, A<2>, A<3> are H, lower alkyl, halogen, R<1>, R<2>, R<3> are optionally substd. alkyl or aralkyl, X is pair of electrons or a vibalent group such as alkylene, phenylene or the like, Y is optionally substd. alkylene or phenylene) or an isocyanate group precursor having an isocyanate group, etc. locked by phenol, etc. and a resin having a functional group, such as OH, COOH, NH2 or the like, which can react with the isocyanate group, for example, a copolymer resin of hydroxyethyl acrylate and styrene, etc. or a magnetic toner contg. magnetic powder by using said resin as a binder is prepd. |
