Patent ID: 7727699
Filing Date: 2010-06-01
Classification: G03G

Abstract:
1. A process for producing a toner for electrophotography, comprising: (a) emulsifying a resin binder comprising a polyester in an aqueous medium to produce resin particles; (b) aggregating the resin particles in an aqueous medium; and (c) unifying the aggregated resin particles, wherein (b) comprises: (a-1) adding a monovalent salt as an aggregating agent prior to the aggregation; and (a-2) adding at least one aggregation stopping agent selected from the group consisting of (i) alkylethersulfates represented by the formula (1) wherein R is an alkyl group; n represents an average molar number of addition and is a number of more than 0 and not more than 15 (0<n≦15), and M is a monovalent cation, (ii) alkylsulfates; and (iii) linear alkylbenzenesulfonates, at the time at which a volume median particle size (D50) of the aggregated resin particles reaches from 90 to 120% of the volume median particle size (D50) of the resultant unified particles.