| abstract |
(57) Abstract: A polyester resin for a toner binder used for a toner, which has excellent offset resistance and low-temperature fixing property, and also has excellent durability and sharp image characteristics, a method for producing the same, and the same Toner is provided. SOLUTION: An etherified bisphenol, a divalent carboxylic acid component and a polyhydric alcohol having a valence of 3 or more and / or a polyvalent carboxylic acid component having a valence of 3 or more are copolymerized to give a hydroxyl value of 10 mgKOH / g or less, Number average molecular weight is 200 A low molecular weight polyester crosslinked product having a number average molecular weight of 0 or less and a number average molecular weight / weight average molecular weight of 2.5 or more is obtained, and at least a part of the low molecular weight polyester crosslinked product is linked via a dihydric alcohol blended as a linking agent. Polyester resin for toner binders. |