Mitsubishi Kasei Corporation

Mitsubishi Chemical Corporation

Takashi Shintaku

Mikio Uno

Takatsugu Takehara

Yoshihiro Kigami

Takeshi Ohwada

Takuya Nishikiori

Kazuhiro Hirama

Yoshio Kojima

Masami Tsurumori

In the present invention, there is provide a toner for electrostatic image development comprising a resin, a coloring agent and a compound having at least one group represented by the formula:

Toner for electrostatic image development by heat

Disclosed is a method for producing a toner for developing electrostatic images, which comprises the steps of kneading a mixture of raw materials comprising at least a resin and a colorant, cooling the kneaded mixture, pulverizing the cooled mixture, classifying the pulverized mixture, and feeding a fine powder separated by the classification step to a melt of the mixture of raw materials in the middle of the kneading step. The toner has improved fixability, durability and storage stability, with which stable and high-quality images are obtained even by continuous copying operation.

Method for producing toner for developing electrostatic images

A toner for heat fixing comprising a styrene type resin and a colorant and satisfying the following formula:

Toner for heat fixing

A novel toner for developing electrostatic images is disclosed, which comprises at least a resin and a granulated carbon black having a grain hardness of 2 g or less as starting raw materials blended therein. In addition, a novel process for the production of the novel toner is described.

Toner for developing electrostatic image and process for production

Disclosed herein are an electrostatic image-developing toner comprising a binder resin, a quaternary ammonium salt and an acidic carbon black as colorant, and an electrostatic image developer containing the same.

Electrostatic image-developing toner and developer

An electrostatic image-developing positively chargeable toner comprising at least toner particles containing a resin and a colorant, and conductive fine particles having their surface treated with a positively chargeable resin.

Electrostatic image-developing positively chargeable toner and developer

Disclosed herein is an electrostatic image-developing toner comprising particles of a toner precursor particles composed of at least a resin and a colorant, and powder of a compound represented by the following formula (I):

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Machida, Japan

Takashi Shintaku