Sanyo Chemical Industries, Ltd.

Mitsumasa Kamura

Tsuyoshi Okamoto

Shinichi Maeda

Yuya Iwagoe

Masashi Minaki

Tsuyoshi Fukushima

Yoshitaka Katsukawa

Yusuke Yamazaki

Shuichi Shinohara

Toshiki Kojima

The present invention provides a water-soluble lubricating oil including a water-soluble base (A) and a corrosion inhibitor (B). The water-soluble base (A) contains at least one polyether (A1). A 0.1% by weight aqueous solution of the water-soluble lubricating oil has a surface tension of 31 mN/m or higher.

Water-soluble lubricant oil

Disclosed is a toner binder which has high storage stability and can achieve both of good low-temperature fixability and good hot offset resistance (a broadened fixing temperature range). Specifically disclosed is a toner binder comprising, as constituting units, a carboxylic acid component (x) and a polyol component (y), wherein the component (x) comprises two or more kinds of dicarboxylic acids (X1), selected from among aromatic dicarboxylic acids and ester-forming derivatives of the same, in a total amount of 80 mol % or more and a trivalent or higher polycarboxylic acid (x2); the component (y) comprises a polyester resin (P) which is constituted by a polyester resin (A) comprising 80 mol % or more of an aliphatic diol (y1) having 2 to 10 carbon atoms optionally together with a linear polyester resin (B); and the storage modulus at 150&#xb0; C. [G'150] of resin (A) is 20000 dyn/cmor more and the ratio of [G&#x2032;150] to the storage modulus as 180&#xb0; C. [G&#x2032;180] thereof, i.e., [G&#x2032;150]/[G&#x2032;180], is 15 of less.

Toner binder and toner composition

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Kyoto, Japan

Mitsumasa Kamura