Orient Chemical Industries, Ltd.

Orient Chemicals Industries, Lt.

Osamu Yamate

Masashi Yasumatsu

Kazuyoshi Kuroda

Jun Hikata

Kaori Sato

Heihachi Yushina

A method for manufacturing a charge control agent comprising steps of: (in the chemical formula [1], &#x2014;Ar&#x2014; and &#x2014;Ar&#x2014; are aromatic groups) and a metal chelating agent to prepare an azo-type metal complex salt intermediate; (in the chemical formula [2], &#x2014;Ar&#x2014; and &#x2014;Ar&#x2014; are the same as the chemical formula [1]; M is a trivalent metal; Bis a cation except an ammonium ion; n is from 0.70 to 1.00).

Method for manufacturing charge control agent

A positive electrified charge control agent comprising a silicon complex compound of an effective component represented by the following chemical formula (I) and/or chemical formula (II) (in the formula (I) and formula (II), [D-(SO)]is a bivalent anion of an organic acid having at least two sulfonic acid groups, p is 0 or 1, B is a bonding line when p is 0, B is a carbon atom or a nitrogen atom when p is 1, J is a carbon atom or a nitrogen atom, A is an organic group which forms a ring with (B)and J, both of R are same or different to each other and are an organic group, and these both of R are independent or form a heterocyclic ring). A positive electrified toner for developing an electrostatic image comprises the positive electrified charge control agent. A charge control method of the positive electrified toner for developing the electrostatic image comprises a step for making the toner positively electrified by friction.

Positive electrified charge control agent and positive electrified toner for developing electrostatic image

The charge control agent comprises aggregate particles including an azo-type iron complex salt represented by the following chemical formula [VI] (in the chemical formula [VI], Bis (H)(Na)and x is mole ratio and 0.6 to 0.9, or Bis (H)(Na)and y is mole ratio and 0 to 0.2) and the aggregate particles have 0.5 to 5.0 microns of an average particle size. A toner for developing an electrostatic image comprises a resin for the toner and the charge control agent. An image formation process of electrophotography comprises a step for developing an electrostatic latent image on an electrostatic latent image frame by a developer including the toner.

Electric charge controlling agent, toner for developing electrostatic charge image containing the same, and method for forming image using the toner

A charge control agent of the present invention comprises aggregate particles of an azo-type iron complex salt represented by the following chemical formula [I] in the chemical formula [I], R&#x2014;, R&#x2014;, R&#x2014;, R&#x2014;, R&#x2014; and R&#x2014; are same or different to each other, n is 0.7 to 0.99,the aggregate particles have an average particle size of 1 to 4 microns and an average particle size of a primary particulate crystalline, that is fined the aggregate particles with ultrasonic irradiation, is at most 3 microns. A toner for developing an electrostatic image comprises a resin for the toner and the charge control agent.

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Neyagawa, Japan

Osamu Yamate