| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polyester toner binder having a wide fixing temperature range, excellent in fluidity and not causing trouble such as the occurrence of a void or the lowering of image density in continuous copying. SOLUTION: In the electrophotographic toner binder comprising a polyester resin, this polyester resin comprises a polyester resin (A) subjected to molecular extension with an extending agent (C) and the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is 8-2,000.</p> |
