Ink jet recording aqueous ink composition and image forming method

Patent metadata

Field	Value
Publication number	US-10696060-B2
Application number	US-201916279962-A
Country	US
Kind code	B2
Filing date	Feb 19, 2019
Priority date	Sep 29, 2016
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

Provided are an ink jet recording aqueous ink composition including: a coloring material; water; an organic solvent d-1 which is represented by Formula 1 or 2 and which has a C log P value of 0.5 to 3.5; and a resin particle including a resin containing 1 mass % to 20 mass % of a monomer unit c-1 having a C log P value more than the C log P value of the organic solvent d-1 and having an anionic group, with respect to a total mass of the resin, in which a content of the organic solvent d-1 is 0.5 mass % to 10 mass % with respect to a total mass of the ink jet recording aqueous ink composition, and an image forming method.

First claim

What is claimed is:

1. An ink jet recording aqueous ink composition comprising:
a coloring material;
water;
an organic solvent d-1 which is represented by Formula 1 or 2 and which has a C log P value of 0.5 to 3.5; and
a resin particle including a resin containing 1 mass % to 20 mass % of a monomer unit c-1, which is represented by Formula 3, having a C log P value more than the C log P value of the organic solvent d-1 and having an anionic group, with respect to a total mass of the resin,
wherein a content of the organic solvent d-1 is 0.5 mass % to 10 mass % with respect to a total mass of the ink jet recording aqueous ink composition,

in Formula 1 or 2, R 1 's each independently represent a hydrogen atom or a methyl group, R 2 represents a linear or branched hydrocarbon group having 4 to 9 carbon atoms or an aryl group having 6 to 10 carbon atoms, and n represents an integer of 1 to 3,

in Formula 3, R 3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, X 1 represents a divalent linking group, Y 1 represents an anionic group, and in X 1 and Y 1 , an atom farthest from a main chain is disposed 9 atoms to 27 atoms away from the main chain.

2. The ink jet recording aqueous ink composition according to claim 1 ,
wherein the monomer unit c-1 is a monomer unit represented by Formula 4 or 5,

in Formula 4 or 5, R 3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, A 1 represents a single bond, —C(═O)O—, or —C(═O)NR 4 —, R 4 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, L 1 represents a divalent linking group having 6 to 22 carbon atoms, Y 1 represents an anionic group, and in L 1 and Y 1 , an atom farthest from a main chain is disposed 9 atoms to 27 atoms away from the main chain.

3. The ink jet recording aqueous ink composition according to claim 2 ,
wherein Y 1 in Formula 4 or 5 is —C(═O)OM, —S(═O) 2 OM, or —OP(═O)(OM) 2 , and M is a proton, an alkali metal ion, or an ammonium ion.

4. The ink jet recording aqueous ink composition according to claim 2 ,
wherein Y 1 in Formula 4 or 5 is —C(═O)OM, and M is a proton, an alkali metal ion, or an ammonium ion.

5. The ink jet recording aqueous ink composition according to claim 2 ,
wherein the monomer unit c-1 is a monomer unit represented by Formula 4.

6. The ink jet recording aqueous ink composition according to claim 1 ,
wherein the resin further contains a monomer unit c-2 derived from an ethylenically unsaturated compound having an aromatic ring structure or an alicyclic structure.

7. The ink jet recording aqueous ink composition according to claim 6 ,
wherein the monomer unit c-2 includes a monomer unit represented by any one of Formulae A to E,

in Formulae A to E, R 11 and R 12 each independently represent a methyl group or a hydrogen atom, R 13 's each independently represent a linear or branched alkyl group having 1 to 10 carbon atoms, n is an integer of 0 to 5, and L 11 represents a single bond, or a linear or branched alkylene group having 1 to 18 carbon atoms which may have a ring structure, an arylene group having 6 to 18 carbon atoms, —O—, —NH—, —S—, —C(═O)—, or a divalent linking group formed by linking two or more thereof.

8. The ink jet recording aqueous ink composition according to claim 7 ,
wherein the monomer unit c-2 includes a monomer unit represented by Formula A, and a content of the monomer unit represented by Formula A is 5 mass % to 90 mass % with respect to a total mass of the resin.

9. The ink jet recording aqueous ink composition according to claim 7 ,
wherein the monomer unit c-2 includes a monomer unit represented by Formula A, and a content of the monomer unit represented by Formula A is 10 mass % to 50 mass % with respect to a total mass of the resin.

10. The ink jet recording aqueous ink composition according to claim 1 ,
wherein a content of the resin particle is 1 mass % to 10 mass % with respect to the total mass of the ink jet recording aqueous ink composition.

11. The ink jet recording aqueous ink composition according to claim 1 ,
wherein the C log P value of the organic solvent d-1 is 1.5 to 3.0.

12. The ink jet recording aqueous ink composition according to claim 1 ,
wherein a content of the organic solvent d-1 is 1.0 mass % to 5.0 mass % with respect to the total mass of the ink jet recording aqueous ink composition.

13. The ink jet recording aqueous ink composition according to claim 1 , further comprising:
an organic solvent d-2 which is an organic solvent other than the organic solvent d-1 and which has a vapor pressure at 20° C. of 1.0 Pa or more.

14. The ink jet recording aqueous ink composition according to claim 13 ,
wherein a total content of the organic solvent d-1 and the organic solvent d-2 is 10 mass % to 30 mass % with respect to the total mass of the ink jet recording aqueous ink composition, a content mass ratio between the organic solvent d-1 and the organic solvent d-2 (organic solvent d-1:organic solvent d-2) is 1:1 to 1:15.

15. An image forming method comprising:
a step of forming an image by applying the ink jet recording aqueous ink composition according to claim 1 onto a recording medium by an ink jet method.

16. The image forming method according to claim 15 ,
wherein the step of forming the image is a step of forming an image by directly applying the ink jet recording aqueous ink composition according to claim 1 onto a low water-absorptive recording medium or a non-water-absorptive recording medium.

17. The ink jet recording aqueous ink composition according to claim 1 ,
wherein the ink jet recording aqueous ink composition further contains a dispersant.

Assignees

• Fujifilm Corp

Inventors

• Takeshita Kohei
• Hokazono Hirohisa

Classifications

• C08F2/14 Primary

  Organic medium · CPC title

• B41J2/2107 Primary

  characterised by the ink properties (supplying ink in a solid state B41J2/17593) · CPC title

• C08F220/1808

  C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate · CPC title

• C08F220/1804

  C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate · CPC title

• C08F220/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title