Ink composition, ink set, and ink jet recording method

Patent metadata

Field	Value
Publication number	US-2016333209-A1
Application number	US-201615218101-A
Country	US
Kind code	A1
Filing date	Jul 25, 2016
Priority date	Feb 20, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

An ink composition contains (a) a compound which is represented by the following Formula (1) and has a specific molecular weight, (b) a colorant, (c) a polymer having an SP value of equal to or greater than 17 and equal to or less than 24, and (d) water, in which there is a specific relationship between a log P value of the component (a) and an SP value of the component (c). An ink set contains the ink composition, and an ink jet recording method uses the ink composition:

R represents a specific alkyl group; Z 1 represents a single bond, —NR 1 —, or —O—; Z 2 represents —NR 1 — or —O—; at least one of Z 1 or Z 2 is —NR 1 —; R 1 represents a hydrogen atom or a specific alkyl group; and L represents a specific alkylene group or —C 2 H 4 —O—C 2 H 4 —.

First claim

What is claimed is:

1 . An ink composition comprising:
(a) a compound which is represented by the following Formula (1) and has a molecular weight of equal to or greater than 130 and equal to or less than 300,

(in Formula (1), R represents an alkyl group having 1 to 10 carbon atoms; Z 1 represents a single bond, —NR 1 —, or —O—; Z 2 represents —NR 1 — or —O—; at least one of Z 1 or Z 2 is —NR 1 —; R 1 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; and L represents an alkylene group having 1 to 10 carbon atoms or —C 2 H 4 —O—C 2 H 4 —);
(b) a colorant;
(c) a polymer having an SP value of equal to or greater than 17 and equal to or less than 24; and
(d) water,
wherein a log P value of the component (a) and an SP value of the component (c) satisfy the following Expression I.
−1.7 log P value of component ( a )=−0.0456× SP value of component ( c )+0.6319   [Expression 1]

2 . The ink composition according to claim 1 ,
wherein R in the Formula (1) is an alkyl group having 1 to 6 carbon atoms.

3 . The ink composition according to claim 1 ,
wherein the component (a) is a compound represented by the following Formula (2) or (3):

in Formulae (2) and (3), each of R, Z 1 , and Z 2 has the same definition as R, Z 1 , and Z 2 in the Formula (1).

4 . The ink composition according to claim 1 ,
wherein the component (a) is a compound represented by any one of the following Formulae (4) to (9):

in Formulae (4) to (9), each of R and R 1 has the same definition as R and R 1 in the Formula (1).

5 . The ink composition according to claim 1 wherein the content of the component (a) is 1% by mass to 30% by mass.

6 . The ink composition according to claim 4 wherein the content of the component (a) is 1% by mass to 30% by mass.

7 . The ink composition according to claim 1 that is an ink for ink jet recording.

8 . The ink composition according to claim 1 ,
wherein the component (c) is fine polymer particles.

9 . An ink set comprising:
the ink composition according to claim 1 ; and an acid treatment agent containing an acidic compound.

10 . The ink set according to claim 9 ,
wherein the acidic compound is an acid having a molecular weight of equal to or greater than 50 and equal to or less than 200, and having a pKa value of equal to or greater than 1 and equal to or less than 5 in water of 25° C.

11 . An ink jet recording method comprising:
jetting the ink composition according to claim 1 onto a recording medium.

12 . The ink jet recording method according to claim 11 ,
wherein the recording medium is a paper medium.

13 . The ink jet recording medium according to claim 12 ,
wherein the paper medium is coated paper.

14 . The ink jet recording method according to claim 11 , further comprising:
an acid treatment step of applying an acid treatment agent containing an acidic compound onto the recording medium; and an ink applying step of jetting the ink composition according to claim 1 onto the recording medium having undergone the acid treatment step such that an image is formed.

Assignees

• Fujifilm Corp

Inventors

• Shimono Katsuhiro
• Yofu Katsuyuki
• Sakurai Seiya
• Kamada Toshihiro

Classifications

• C09D11/38 Primary

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• B41M5/0017

  Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying · CPC title

• C09D11/54

  Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink · CPC title

• C09D133/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C09D11/10

  based on artificial resins · CPC title