Orient Chemical Industries, Ltd.

Orient Chemical Industries Co., Ltd.

Orient Chemicals Industries, Lt.

Kaori Sato

Masashi Yasumatsu

Kazuyoshi Kuroda

Jun Hikata

Osamu Yamate

Heihachi Yushina

Hayato Inaba

Masakazu Taniguchi

Keigo Kanbara

An azo iron complex dye which does not contain harmful heavy metals, exhibits sufficient solubility in organic solvents for practical use, and exhibits an excellent black color. The azo iron complex dye contains a disazo-monoazo iron complex represented by the following chemical formula (1) (in the chemical formula (1), Rand Rare each independently a straight or branched alkyl group having 3-10 carbon atoms, Ris an electron-withdrawing group, Ris a straight or branched alkyl group having 1-5 carbon atoms or a straight or branched alkoxy group having 1-5 carbon atoms, Ris a nitro group, a sulfonamide group or a halogen atom, Ris a hydrogen atom, a straight or branched alkyl group having 1-8 carbon atoms, a nitro group or a halogen atom, Ris a hydrogen atom or a straight or branched alkyl group having 3-12 carbon atoms, and Ais a monovalent cation).

Azo iron complex dye, ink composition containing same, and method for producing azo iron complex dye

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 toner for developing an electrostatic image comprises a binding resin for a toner and a charge control agent including an azo-type iron complex salt represented by the following chemical formula (1) (in the chemical formula (1), Rand Rare the same or different to each other and are an alkyl group having a straight chain or a branch chain of 3 to 8 carbons; R, R, Rand Rare the same or different to each other and are selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxyl group, a halogen atom, a nitro group and a carboxyl group; Aindicates m(H)+n(K)+p(Na), which m, n and p satisfy numerical equations of m+n+p=1, 0.7&#x2266;m&#x2266;1, 0&#x2266;n&#x2266;0.3 and 0&#x2266;p&#x2266;0.3), wherein an average particle size thereof is 1 to 4 microns, and a specific volume resistivity thereof is ranging from 0.2&#xd7;10to 7&#xd7;10&#x3a9;&#xb7;cm.

Toner for developing electrostatic image and image formation process using it

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.

Growing community of inventors

Neyagawa, Japan

Kaori Sato