Invention Grant
- Patent Title: Inkjet recording ink, ink cartridge, inkjet recording method, inkjet recording device and ink recorded matter
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Application No.: US14766836Application Date: 2014-02-27
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Publication No.: US09752037B2Publication Date: 2017-09-05
- Inventor: Minoru Hakiri , Mitsuru Naruse , Masayasu Nonogaki , Keita Katoh , Akihiko Matsuyama , Kazukiyo Nagai , Yuusuke Koizuka , Masato Matsumura , Takuya Furuta
- Applicant: Minoru Hakiri , Mitsuru Naruse , Masayasu Nonogaki , Keita Katoh , Akihiko Matsuyama , Kazukiyo Nagai , Yuusuke Koizuka , Masato Matsumura , Takuya Furuta
- Applicant Address: JP Tokyo JP Uji-shi
- Assignee: Ricoh Company, Ltd.,GOO CHEMICAL CO., LTD.
- Current Assignee: Ricoh Company, Ltd.,GOO CHEMICAL CO., LTD.
- Current Assignee Address: JP Tokyo JP Uji-shi
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2013-053084 20130315; JP2013-053093 20130315; JP2013-269034 20131226
- International Application: PCT/JP2014/055882 WO 20140227
- International Announcement: WO2014/142013 WO 20140918
- Main IPC: C09D11/30
- IPC: C09D11/30 ; C09D133/04 ; B41J2/21 ; C09D11/326 ; C09D133/14 ; C09D11/107 ; C09D143/02

Abstract:
An inkjet recording ink, including: water; a water-soluble organic solvent; a pigment; and a phosphate group-containing copolymer, wherein the phosphate group-containing copolymer contains a structural unit represented by the following General Formula (1) and a structural unit represented by the following General Formula (2): where R1 denotes a hydrogen atom or a methyl group; M+ denotes an alkali metal ion, an organic amine ion, or a hydrogen ion; half or more of M+ in the copolymer is the alkali metal ion or the organic amine ion, the remainder of M+ is the hydrogen ion; n and m each denote an integer of 0 to 6, provided that both of n and m are not 0; and a block of (C2H4O) and a block of (C3H6O) may be exchanged with each other, where R2 denotes a hydrogen atom or a methyl group.
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Information query
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