Aqueous ink jet ink composition and ink jet recording method

1. An aqueous ink jet ink composition comprising:

resin fine particles;

a dispersant resin;

a non-ionic surfactant;

a resin dissolving solvent selected from the group consisting of a cyclic amide, an alkoxyamide, a cyclic esters, and an ester; and

water,

wherein a content of the resin dissolving solvent is 4 to 18% by mass with respect to the total mass of the aqueous ink jet ink composition,

wherein, in the aqueous ink jet ink composition, a total acid value of an acid value of the resin fine particles (mg KOH/100 g ink) and an acid value of a dispersant resin (mg KOH/100 g ink) is in the range of 84 to 200 (mg KOH/100 g ink), and

the dispersant resin has an acid value in a range of 50 to 300 (mg KOH/g).

2. The aqueous ink jet ink composition according to claim 1 ,

wherein at least one selected from the group consisting of ethers of polyalkylene oxide, esters of higher fatty acid, silicone-based compounds, acetylene glycol-based compounds, and fluorine-based compounds is used as the non-ionic surfactant.

3. The aqueous ink jet ink composition according to claim 1 ,

wherein an acid value of the resin fine particles in the aqueous ink jet ink composition is 170 (mg KOH/100 g ink) or less.

4. The aqueous ink jet ink composition according to claim 1 ,

wherein an acid value of the dispersant resin in the aqueous ink jet ink composition is 100 (mg KOH/100 g ink) or less.

5. The aqueous ink jet ink composition according to claim 1 ,

wherein the dispersant resin has an acid value in a range of 100 to 300 (mg KOH/g).

6. The aqueous ink jet ink composition according to claim 1 ,

wherein resin fine particles formed of a resin with an acid value of 60 (mg KOH/g) or less are included as the resin fine particles.

7. The aqueous ink jet ink composition according to claim 1 ,

wherein any one kind or more selected from the group consisting of a (meth)acrylic resin, a polyurethane-based resin, and a polyester-based resin are included as the resin of the resin fine particles.

8. The aqueous ink jet ink composition according to claim 1 ,

wherein a content of the resin fine particles is 2% by mass or more and 20% by mass or less.

9. The aqueous ink jet ink composition according to claim 1 ,

wherein a content of an organic solvent having a standard boiling point of higher than 280° C. is 3% by mass or less.

10. The aqueous ink jet ink composition according to claim 1 , wherein the content of the resin dissolving solvent is 8 to 18% by mass with respect to the total mass of the aqueous ink jet ink composition.

11. The aqueous ink jet ink composition according to claim 1 , wherein the total acid value of the acid value of the resin fine particles (mg KOH/100 g ink) and the acid value of the dispersant resin (mg KOH/100 g ink) when the aqueous ink jet ink composition includes the dispersant resin is 114 to 200 (mg KOH/100 g ink).

12. The aqueous ink jet ink composition according to claim 1 , further comprising a pigment, wherein the pigment is dispersed by the dispersant resin.

13. The aqueous ink jet ink composition according to claim 1 , wherein the acid value of the dispersant resin in the aqueous ink jet ink composition is 20 to 100 (mg KOH/100 g ink).

14. The aqueous ink jet ink composition according to claim 1 ,

wherein the acid value of the dispersant resin is 50 to 200 (mg KOH/g).

15. An ink jet recording method comprising:

attaching an aqueous ink jet ink composition to a recording medium by ejecting from an ink jet head, the aqueous ink jet ink composition including:

resin fine particles;

a non-ionic surfactant;

a resin dissolving solvent selected from the group consisting of a cyclic amide, an alkoxyamide, a cyclic esters, and an ester, a content of the resin dissolving solvent being 1% by mass or more with respect to a total mass of the aqueous ink jet ink composition; and

water,

wherein the attaching of the aqueous ink jet ink composition is performed on a heated recording medium,

a surface temperature of the recording medium in the attaching of the aqueous ink jet ink composition is 38 degrees C. or less, and

in the aqueous ink jet ink composition, a total acid value of an acid value of the resin fine particles (mg KOH/100 g ink) and an acid value of a dispersant resin (mg KOH/100 g ink) when the aqueous ink jet ink composition includes a dispersant resin is 200 (mg KOH/100 g ink) or less.

16. The ink jet recording method according to claim 15 , further comprising:

attaching a reaction liquid to a recording medium.

17. The ink jet recording method according to claim 15 ,

wherein the recording medium is a recording medium with a low absorbing property or a recording medium with a non-absorbing property.

18. The ink jet recording method according to claim 15 ,

wherein the ink jet recording method is performed using an ink jet recording apparatus provided with an ink jet head and a mechanism for discharging ink from the ink jet head and which is a mechanism other than a pressure generating unit for recording by ejecting an ink composition provided in the ink jet head, and

control is performed in which recording is performed for one hour or longer without performing cleaning performed by the mechanism.

19. The ink jet recording method according to claim 15 ,

wherein the surface temperature of the recording medium in the attaching of the aqueous ink jet ink composition is 30 to 38 degrees C.

20. The ink jet recording method according to claim 15 , the dispersant resin has an acid value in a range of 50 to 300 (mg KOH/g).

21. The ink jet recording method according to claim 15 ,

wherein at least one selected from the group consisting of ethers of polyalkylene oxide, esters of higher fatty acid, silicone-based compounds, acetylene glycol-based compounds, and fluorine-based compounds is used as the non-ionic surfactant.

22. The ink jet recording method according to claim 15 ,

wherein an acid value of the resin fine particles in the aqueous ink jet ink composition is 170 (mg KOH/100 g ink) or less.

23. The ink jet recording method according to claim 15 ,

wherein an acid value of the dispersant resin in the aqueous ink jet ink composition is 100 (mg KOH/100 g ink) or less.

24. The ink jet recording method according to claim 15 ,

wherein the dispersant resin has an acid value in a range of 100 to 300 (mg KOH/g).

25. The ink jet recording method according to claim 15 , wherein resin fine particles formed of a resin with an acid value of 60 (mg KOH/g) or less are included as the resin fine particles.

26. The ink jet recording method according to claim 15 ,

wherein any one kind or more selected from the group consisting of a (meth)acrylic resin, a polyurethane-based resin, and a polyester-based resin are included as the resin of the resin fine particles.

27. The ink jet recording method according to claim 15 ,

wherein a content of the resin fine particles is 2% by mass or more and 20% by mass or less.

28. The ink jet recording method according to claim 15 ,

wherein a content of an organic solvent having a standard boiling point of higher than 280° C. is 3% by mass or less.

29. The ink jet recording method according to claim 15 , wherein the content of the resin dissolving solvent is 8 to 18% by mass with respect to the total mass of the aqueous ink jet ink composition.

30. The ink jet recording method according to claim 15 , wherein the total acid value of the acid value of the resin fine particles (mg KOH/100 g ink) and the acid value of the dispersant resin (mg KOH/100 g ink) when the aqueous ink jet ink composition includes the dispersant resin is 114 to 200 (mg KOH/100 g ink).

31. The ink jet recording method according to claim 15 , further comprising a pigment, wherein the pigment is dispersed by the dispersant resin.

32. The ink jet recording method according to claim 15 , wherein the acid value of the dispersant resin in the aqueous ink jet ink composition is 20 to 100 (mg KOH/100 g ink).

33. The ink jet recording method according to claim 15 , wherein the acid value of the dispersant resin is 50 to 200 (mg KOH/g).