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:
Feb. 11, 2014
Filed:
Feb. 01, 2012
Atsushi Yamamoto, Shizuoka, JP;
Takuya Kadota, Hyogo, JP;
Yoshihiro Mikuriya, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Kazuoki Fuwa, Hyogo, JP;
Tomohiro Fukao, Osaka, JP;
Tomoharu Miki, Osaka, JP;
Atsushi Yamamoto, Shizuoka, JP;
Takuya Kadota, Hyogo, JP;
Yoshihiro Mikuriya, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Kazuoki Fuwa, Hyogo, JP;
Tomohiro Fukao, Osaka, JP;
Tomoharu Miki, Osaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A method for producing colored resin particles including: dissolving or dispersing at least binder resin and colorant in organic solvent to prepare oil phase; dissolving resin A and basic compound in aqueous medium to prepare aqueous phase, the resin A having solubility <2.0 g/100 g water having temperature 25° C. and pH 3.0 and solubility ≧2.0 g/100 g water having temperature 25° C. and pH 10.0; dispersing the oil phase in the aqueous phase to prepare core particle dispersion liquid; dispersing resin particles in aqueous medium to prepare resin particle dispersion liquid, and adding the resin particle dispersion liquid to the core particle dispersion liquid so that the resin particles are attached onto the core particles, to prepare dispersion liquid containing particles each having the core particle and the resin particles attached thereonto; removing the organic solvent from the dispersion liquid; washing the particles; and drying the particles.