Sanyo Chemical Industries, Ltd.

Yoko Sakurai

Takashi Ono

Yasuhiro Ono

Tomohisa Kato

Naoki Takase

Shuhei Yahiro

Hiroshi Kishiki

Syuji Yamada

A polyester resin toner binder which gives a toner with good anti-blocking property at high temperature and high humidity and good low-temperature fixing ability. The present invention is directed to a toner binder for developing electrostatic charge images, which binder comprises a condensation-polymerization polyester resin, the polyester resin being a product formed in the presence of a catalyst (a) represented by the following general formula (I):Ti(&#x2014;X)(&#x2014;OR)&#x2003;&#x2003;(I)wherein R, X, m and n are as defined herein.

Toner and toner binder

The present invention concerns a method for producing an aqueous dispersion (X1), the method including a step that includes mixing an aqueous dispersion liquid (W) of resin particles (A) comprising a resin (a) with a precursor (b0) of a resin (b) or an oily liquid (OL) comprising the precursor (b0) and an organic solvent to disperse the precursor (b0) or the oily liquid (OL) in the aqueous dispersion liquid (W), followed by causing the precursor (b0) to react in the aqueous dispersion liquid (W) to form resin particles (B) comprising the resin (b), thereby obtaining the aqueous dispersion (X1) of resin particles (C) having a structure where resin particles (A) are adhered on the surface of the resin particles (B), wherein at least one of the resin (a) and the resin (b) contains a polyester resin (p1) formed in the presence of a specific titanium catalyst (t) or a resin (p2) having the polyester resin (p1) as a constituent unit.

Method for producing resin dispersions and resin particles

The present invention provides a toner binder for developing electrostatic charge images, Furthermore, the present invention provides a toner binder for developing electrostatic charge images,

Resin for toner binder and toner composition

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Kyoto, Japan

Yoko Sakurai