Patent ID: 8142971
Filing Date: 2012-03-27
Classification: G03G

Abstract:
1. An electrostatic charge developer comprising: a carrier having a core material and a resin coating layer covering a surface of the core material, the resin coating layer containing a copolymer that contains (i) a nitrogen-containing acrylic ester or a nitrogen-containing methacrylic ester and (ii) an alicyclic acrylic ester or alicyclic methacrylic ester; and a toner containing a binder resin that contains a non-crystalline polyester resin and a crystalline polyester resin, the non-crystalline polyester resin containing at least (i) an alkyl succinic acid or an anhydride or lower alkyl ester thereof or (ii) an alkenyl succinic acid or an anhydride or lower alkyl ester thereof, and the crystalline polyester resin being an aliphatic polyester resin, wherein the content of the nitrogen-containing acrylic ester or nitrogen-containing methacrylic ester in the copolymer is from about 0.2 mol % to about 5 mol %, and the content of the alicyclic acrylic ester or alicyclic methacrylic ester in the copolymer is from about 85 mol % to about 99.8 mol %.