POLYESTER RESIN WITH HIGH SOFTENING POINT FOR TONER AND POLYESTER-BASED TONER WITH HIGH SOFTENING POINT

摘要

PROBLEM TO BE SOLVED: To provide a polyester resin and a polyester-based toner useful for a dry toner for development of an electrostatic charge image or magnetic latent image in a method for electrophotography, electrostatic recording, electrostatic printing or the like and having good offset resistance in a heating and fixing part during double sides printing. SOLUTION: The polyester resin having high softening temperature for a toner shows 60 to 90 magnification of swelling measured by tetrahydrofuran and 180 to 230 deg.C softening temperature and the toner contains the above resin.