Patent ID: 8187779

Claim:
A toner for electrostatic image development comprising (a) a resin binder and (b) a charge control agent, wherein the resin binder comprises a polyester A obtained by polycondensing an alcohol component and a carboxylic acid component comprising isophthalic acid and/or an ester thereof, and wherein the charge control agent comprises an azo-iron complex represented by formula (I): wherein both R 1 and R 4 are a tert-butyl group; each of R 2 , R 3 , R 5 , and R 6 are a hydrogen atom; and A + is a cation, wherein the charge control agent is dispersed in the toner, wherein the alcohol component comprises an alkylene oxide adduct of bisphenol A represented by formula (II): wherein each of R 7 O and OR 7 is an oxyalkylene group, wherein R 7 is an ethylene group and/or a propylene group; and x and y are the number of moles of alkylene oxides added, each being a positive number, wherein an average of the sum of x and y is from 1 to 16, wherein the isophthalic acid of polyester A is contained in an amount of at least 50% by mol of the carboxylic acid component, and wherein the amount of polyester component in the resin binder is 100% by weight and the amount of polyester A is at least 50% by weight of the polyester component.