The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2018
Filed:
May. 24, 2016
Kao Corporation, Chuo-ku, JP;
Tatsuya Yamada, Wakayama, JP;
Nobumichi Kamiyoshi, Wakayama, JP;
Kao Corporation, Chuo-ku, JP;
Abstract
A liquid developer containing toner particles containing a resin binder and a pigment, wherein the toner particles are dispersed in an insulating liquid in the presence of a dispersant, wherein the resin binder contains a polyester resin P having a glass transition temperature of 35° C. or higher, obtained by polycondensing raw material monomers containing an alcohol component comprising an aliphatic diol having 2 or more carbon atoms and 6 or less carbon atoms in an amount of 70% by mol or more and 100% by mol or less, and a carboxylic acid component, and wherein the dispersant contains a copolymer C prepared by polymerizing a monomer A having an amino group and a monomer B represented by the formula (I): wherein Ris a hydrogen atom or a methyl group; and Ris an alkyl group having 1 or more carbon atoms and 22 or less carbon atoms or an alkenyl group having 2 or more carbon atoms and 22 or less carbon atoms, each of which may have a substituent, wherein a molar ratio of the monomer A to the monomer B (monomer A/monomer B) is 2/98 or more and 50/50 or less; and a method for producing the same. The liquid developer of the present invention is suitably used in development or the like of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.