Patent ID: 7955774
Filing Date: 2011-06-07
Classification: G03G

Abstract:
1. An electrostatic image developing toner comprising a non-crystalline polyester resin and a crystalline polyester resin, wherein the non-crystalline polyester resin is obtained by copolymerizing monomers in the presence of a titanium catalyst, without using a tin catalyst, the monomers comprising: a ratio of an amount of the monomer containing a sulfonic acid group to the total amount of the non-crystalline polyester resin is 0.1 mol % to 20 mol %, a content of titanium remaining present in the toner is 1 ppm to 1000 ppm by weight based on the amount of the resin, the non-crystalline polyester resin has a Gardner color scale of 3 or less, and the crystalline polyester resin is present in an amount of 3% by weight to 50% by weight based on the weight of the toner.