| abstract |
Provided is a toner binder that can achieve both low-temperature fixability and hot offset resistance, and is excellent in storage stability, chargeability, and wet heat resistance of fixed images. A toner binder containing a polyester resin (A) having polycarboxylic acid (x) and polyol (y) as structural units, wherein (y) is 1,2-propylene glycol (PG). And (PG) is one or more selected from the group consisting of (a) a fatty acid or a metal salt thereof, (b) a sulfur-containing compound, (c) a nitrogen-containing compound, and (d) a trihydric or higher polyhydric alcohol. A toner binder containing a substance and having a content of 0.001 to 10% by weight based on the weight of (PG). [Selection figure] None |