| abstract |
A modified polyester is produced by co-condensation-polymerizing a starting linear polyester which may have a branched group, having a number-average molecular weight of 300 to 1,400 and containing from 10 to less than 25 mole percent, basd on the total constituent monomer units of the starting polyester, of a dihydric alcohol having the following formula: HO-(CH2)n-OH, in which n is an integer of 2 to 6, with a tri- or more-valent monomer(s) selected from a tri- or higher valent carboxylic acid, a derivative thereof and a tri- or higher-valent alcohol. The modified polyester is useful as binder resin in an electrophotographic developer composition and toner. |