Resin emulsion

A process for producing a toner for electrophotography, comprising:

• (A) (A-1) obtaining a resin binder comprising an acid group-containing polyester having an acid value of 6 to 30 mg KOH/g produced from a raw monomer composition comprising a trivalent or higher-valent polyhydric alcohol in an amount of 1 to 15 mol % by polycondensing at a temperature of 180 to 250° C. by using an esterification catalyst,
• (A-2) dispersing the resin binder after adding a combination of an anionic surfactant and a nonionic surfactant to the resin binder,
• neutralizing the obtained dispersion with a basic compound in an aqueous medium;
• and thereafter,
• emulsifying the resin in the aqueous medium by adding an aqueous liquid to obtain a neutralized resin emulsion;
• and
• (B) aggregating and unifying emulsified resin particles contained in the obtained neutralized resin emulsion,
• wherein said neutralizing is conducted at a temperature not lower than a glass transition point but not higher than a softening point of the resin binder, and wherein said aqueous liquid is added to the neutralized dispersion at a temperature not lower than the glass transition point but not higher than the softening point of the resin binder to emulsify the resin in the aqueous medium.