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. 19, 2013
Filed:
Oct. 13, 2011
Mikihiko Sukeno, Hyogo, JP;
Hajime Tadokoro, Kanagawa, JP;
Ken Ohmura, Tokyo, JP;
Tatsuya Nagase, Tokyo, JP;
Tomomi Oshiba, Tokyo, JP;
Kenji Hayashi, Tokyo, JP;
Saburou Hiraoka, Tokyo, JP;
Tomoko Mine, Tokyo, JP;
Mikihiko Sukeno, Hyogo, JP;
Hajime Tadokoro, Kanagawa, JP;
Ken Ohmura, Tokyo, JP;
Tatsuya Nagase, Tokyo, JP;
Tomomi Oshiba, Tokyo, JP;
Kenji Hayashi, Tokyo, JP;
Saburou Hiraoka, Tokyo, JP;
Tomoko Mine, Tokyo, JP;
Konica Minolta Business Technologies, Inc., Tokyo, JP;
Abstract
A method of producing an electrostatic image developing toner comprising toner particles comprising a binder resin containing at least a non-crystalline polyester resin having a crosslinking structure and a crystalline polyester resin, the method comprising the steps of (a-1) preparing a crystalline polyester resin particle aqueous dispersion liquid; (a-2) preparing a polymerizable unsaturated non-crystalline polyester resin aqueous dispersion liquid; (b) preparing crosslinking non-crystalline polyester resin particles by adding a radical polymerization initiator to the aqueous dispersion liquid of particles containing the non-crystalline polyester resin having a polymerizable unsaturated bond; (c) preparing core particles by aggregating at least the particles containing the crystalline polyester resin in an aqueous medium; and (d) preparing a shell layer containing the non-crystalline polyester resin having a crosslinking structure by fusing the particles containing the non-crystalline polyester resin having a crosslinking structure on surfaces of the core particles in an aqueous medium.