Konica Minolta Business Technologies, Inc.

Noriyuki Kimpara

Kenji Hayashi

Hiroshi Nagasawa

Mikio Kouyama

Hiroaki Obata

Yasuhiko Muramatsu

In the present invention, provided is an electrophotographic toner in which low temperature fixing is achieved, and high storage stability is obtained without generating tacking with respect to fixed images to be formed. It is a feature that this electrophotographic toner possesses at least a binder resin, a colorant and a releasing agent, wherein the releasing agent comprises an ester compound and an aliphatic hydroxycarboxylic acid compound.

Electrophotographic toner

In the present invention, provided is a toner suitable for fixing at low temperature, which exhibits excellent performance against thermal stress as well as mechanical stress with no generation of blocking even during storage for a long duration in an unused state, and also with no generation of tacking of toner images after fixing. Also disclosed is a toner comprising at least a binder resin, a colorant and a wax, the toner comprising a fatty acid ester wax comprising a hydroxyl group, and an aliphatic alcohol.

Toner, developer, and method of manufacturing toner

A preparation method of a toner comprising a binder resin and a colorant is disclosed, comprising forming resin particles containing a resin formed by allowing a styrene monomer, a (meth)acryl monomer and a polymer represented by the formula (1) to react, and mixing the resin particles with colorant particles which were dispersed and allowing the resin particles and the colorant particle to coagulate and fuse to form toner particles,X&#x2014;(Y)&#x2014;X&#x2003;&#x2003;formula (1)wherein X is at least one of an acryloyl group and a methacryloyl group, Y is a radical polymerizable monomer unit and n is an integer of 25 to 1000.

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Tokyo, Japan

Noriyuki Kimpara