Toner and toner binder

A toner comprising a toner binder and a colorant, wherein the toner is in the form of particles having a Wadell practical sphericity of 0.90 to 1.00 and the toner binder comprises a polyester (i) modified with a urea bond with or without a urethane bond, the ratio of the urea bond to the urethane bond in the modified polyester (i) being from 10/0 to 1/9.

A toner comprising a toner binder and a colorant, wherein the toner binder comprises resin particles produced by causing an extension reaction and/or crosslinking reaction of a dispersion formed of a reactive group-containing prepolymer (α) contained in an aqueous medium by using an extender and/or a crosslinking agent (β).

A toner binder polyesters derived from a polyol (1) and a polycarboxylic acid (2), wherein the polyesters comprise a polyester (i) modified with a urea bond and a polyester (ii) modified neither with a urethane bond nor with a urea bond.

A toner binder comprising polyesters derived from a polyol (1) and a polycarboxylic acid (2), wherein the polyesters comprise a polyester (i) modified with a urethane bond and/or a urea bond and an unmodified polyester (ii) free from any urethane bond and any urea bond, the unmodified polyester (ii) having a peak molecular weight of 1000 to 10000 in a chromatogram of gel permeation chromatography (GPC) and a hydroxyl value of 5 or more.