| 摘要 |
<p>PURPOSE:To provide the resin composition for the electrophotographic toner having both functions of a binder and a mold-releasing agent and enlarging a fixing temperature range and preventing troubles, such as void spots, at the time of successive copying cycles. CONSTITUTION:The electrophotographic toner resin composition comprises a polypropylenic resin (1), a graft polymer (2) prepared by grafting styrenic or styrene-(meth)acrylic polymer chains to the resin (1), and a styrene-(meth) acrylic resin (3). This resin composition has a temperature(TP) indicating an endothermic peak between 139-160 deg.C measured by the melting heat measurement method of DSC and a ratio of an endothermic peak height H2 at a temperature lower than TP by 10 deg.C to the endothermic peak height H1 at TP (H2/H1) of 0.6-1.5, and the resin (1) is dispersed with an average particle diameter or 0.05-5mum.</p> |
