Electrophotographic toner containing a vinyl resin and process for producing same

摘要

An electrophotographic toner is disclosed which comprises a colorant and a binder resin, in which the binder resin is present as a vinyl resin whose gel content ranges from 15 to 25% by weight and whose tetrahydrofuran-soluble content has a number-average molecular weight (Mn) ranging from 5,000 to 12,000, a weight-average molecular weight (Mw) ranging from 10x104 to 40x104 and a higher Mw peak in the range of from 9x105 to 18x105. The toner exhibits improved chargeability and improved powder fluidity as well as improved fixing properties and improved offset resistance. A process for producing the toner is also disclosed.