Invention Grant
US08109622B2 Recording ink, ink cartridge, inkjet recording method, and inkjet recording apparatus
有权
记录墨水,墨盒,喷墨记录方法和喷墨记录装置
- Patent Title: Recording ink, ink cartridge, inkjet recording method, and inkjet recording apparatus
- Patent Title (中): 记录墨水,墨盒,喷墨记录方法和喷墨记录装置
-
Application No.: US12282437Application Date: 2007-03-09
-
Publication No.: US08109622B2Publication Date: 2012-02-07
- Inventor: Hiroshi Goto , Akihiko Matsuyama , Kiyofumi Nagai
- Applicant: Hiroshi Goto , Akihiko Matsuyama , Kiyofumi Nagai
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2006-065610 20060310
- International Application: PCT/JP2007/055303 WO 20070309
- International Announcement: WO2007/105806 WO 20070920
- Main IPC: G01D11/00
- IPC: G01D11/00

Abstract:
The present invention provides a recording ink including a composite pigment particle, a water-soluble solvent, and water, wherein the composite pigment particle is a primary particle coated with a coating resin, wherein the primary particle is a white pigment on the surface of which an oil-soluble dye is adsorbed or attached. In one aspect, the white pigment is preferably at least one selected from a white inorganic pigment, a pearl pigment, and an extender pigment, in another aspect, the coating resin is preferably one of a (meth)acrylic resin, a polyester resin, and a polyurethane resin, wherein the acid value of the coating resin is from 50 mgKOH/g to 250 mgKOH/g, and in another aspect, an average particle diameter (D50%) of the composite pigment particle is preferably 150 nm or less.
Public/Granted literature
- US20090098312A1 RECORDING INK, INK CARTRIDGE, INKJET RECORDING METHOD, AND INKJET RECORDING APPARATUS Public/Granted day:2009-04-16
Information query