Ink for aqueous inkjet recording, inkjet recording method, and inkjet printed matter

Patent metadata

Field	Value
Publication number	US-2016355695-A1
Application number	US-201615243250-A
Country	US
Kind code	A1
Filing date	Aug 22, 2016
Priority date	Jul 12, 2013
Publication date	Dec 8, 2016
Grant date	—

Abstract

An ink for aqueous inkjet recording contains: water; a hydrosoluble organic solvent; a pigment; and polycarbonate-based urethane resin particles, wherein the pigment contains a geminalbis phosphonic acid group and/or a geminalbis phosphonate group.

First claim

1 - 8 . (canceled)

9 . An ink for aqueous inkjet recording comprising:
water, a hydrosoluble organic solvent; a pigment; and polycarbonate-based urethane resin particles, wherein the pigment comprises at least one of a geminalbis phosphonic acid group or a geminalbis phosphonate group, wherein the pigment comprises at least one of groups represented by chemical formula 1 to chemical formula 4, respectively:

in the chemical formula 3, X + represents Li + , K + , Na + , NH 4 + , N(CH 3 ) 4 + , N(C 2 H 5 ) 4 + , N(C 3 H 7 ) 4 + , or N(C 4 H 9 ) 4 + ,

in the chemical formula 4, X + represents Li + , K + , Na + , NH 4 + , N(CH 3 ) 4 + , N(C 2 H 5 ) 4 + , N(C 3 H 7 ) 4 + , or N(C 4 H 9 ) 4 + ,
wherein the polycarbonate-based urethane resin particles comprises a structure derived from at least one kind of alicyclic diisocyanate, and
wherein the hydrosoluble organic solvent comprises at least one of 1,2-propane diol, 1,3-propane diol, 1,2-butane diol, 1,3-butane diol, or 2,3-butane diol.

10 . The ink for aqueous inkjet recording according to claim 9 , wherein the polycarbonate-based urethane resin particles have a surface hardness of 100 N/mm 2 or more as a layer of the polycarbonate-based urethane resin particles is formed.

11 . The ink for aqueous inkjet recording according to claim 9 ,
wherein the polycarbonate-based urethane resin particles account for 50% by weight or more of the total amount of resin added to the ink.

12 . The ink for aqueous inkjet recording according to claim 9 ,
wherein the polycarbonate-based urethane resin particles are included in the ink in an amount of from 4.5% by weight to 10% by weight based on the total weight of the ink.

13 . An inkjet recording method comprising:
printing an image with the ink for aqueous inkjet recording of claim 9 .

14 . The inkjet recording method according to claim 13 , further comprising heating after the step of printing.

15 . An inkjet printed matter comprising:
a recording medium; and an image formed on the recording medium by using the ink for aqueous inkjet recording of claim 9 .

16 . The ink for aqueous inkjet recording according to claim 9 , further comprising:
a polyol alkyl ether.

Assignees

• Nakagawa Tomohiro
• Toda Naohiro
• Nagashima Hidefumi
• Fujii Lchiroh
• Ricoh Co Ltd

Inventors

• Nakagawa Tomohiro
• Toda Naohiro
• Nagashima Hidefumi
• Fujii Lchiroh

Classifications

• C09D11/322 Primary

  Pigment inks · CPC title

• C09D11/324

  containing carbon black · CPC title

• C09D11/033

  characterised by the solvent · CPC title

• C09D11/326

  characterised by the pigment dispersant · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title