Invention Grant
- Patent Title: Inkjet recording ink and image forming method
- Patent Title (中): 喷墨记录油墨和成像方法
-
Application No.: US12992203Application Date: 2009-05-22
-
Publication No.: US08474963B2Publication Date: 2013-07-02
- Inventor: Shin Hasegawa , Minoru Hakiri , Mitsuru Naruse , Hiroyuki Fushimi
- Applicant: Shin Hasegawa , Minoru Hakiri , Mitsuru Naruse , Hiroyuki Fushimi
- 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: JP2008-136283 20080526
- International Application: PCT/JP2009/059831 WO 20090522
- International Announcement: WO2009/145284 WO 20091203
- Main IPC: B41J2/01
- IPC: B41J2/01

Abstract:
An inkjet recording ink which includes: a carbon black; a dispersant, wherein the dispersant is a sodium naphthalenesulfonate-formalin condensate; resin emulsion; and water, in which the resin emulsion contains a resin which is at least one of a urethane resin and a styrene-acryl resin, and the ink satisfies the following relationship: 20≦B−A≦50, where A(nm) represents a particle diameter D90 of particles contained in dispersion containing the carbon black, the dispersant, and water, which is before added with the resin emulsion, and B(nm) represents a particle diameter D90 of particles contained in the ink.
Public/Granted literature
- US20110074865A1 INKJET RECORDING INK AND IMAGE FORMING METHOD Public/Granted day:2011-03-31
Information query
IPC分类: