Method of preparing polyester toner by suspension process with reverse-neutralization

摘要

PURPOSE: Provided is a production process of a polyester toner generated by underwater suspension accompanied by desalination which produces the polyester toner with narrow particle distribution degree so that it improves developing property. CONSTITUTION: The production process of the polyester toner generated by underwater suspension accompanied by desalination comprises the steps of: (i) letting 2-3 carboxyl groups formed at terminal of high molecule chain to prepare a polyester resin composition at both polymerization reactions for linear low molecule polyester and cross-linking polyester; (ii) getting the polymer composition solved in an alkali compound to prepare aqueous polyester resin solution; (iii) adding a coloring agent, a charge control agent and a releasing agent to the polyester resin solution to prepare a colored resin composition; and (iv) letting the colored resin composition added to an acidic compound and suspended with desalination reaction to produce a toner particle with 5-10 micrometers in diameter.