JP2018162441A5

JP2018162441A5 -

Info

Publication number: JP2018162441A5
Application number: JP2018022727A
Authority: JP
Filing date: 2018-02-13
Publication date: 2021-03-25
Anticipated expiration: 2038-02-13

Claims

A water-based ink for inkjet that contains a coloring material and a water-soluble organic solvent.
The coloring material is a compound represented by the following general formula (1).
The water-soluble organic solvent contains a first water-soluble organic solvent having two or more hydroxy groups and having a LogP value of -1.88 or more and -1.09 or less.
A water-based ink characterized in that the content (mass%) of the first water-soluble organic solvent is 5.0 times or more and 30.0 times or less in terms of mass ratio with respect to the content (mass%) of the coloring material. ..

(In the general formula (1), R ₁ , R ₂ and R ₃ are independently hydrogen atoms; carboxylic acid groups; sulfonic acid groups; hydroxy groups; acetylamino groups; halogen atoms; cyano groups; nitro groups. Sulfamoyl group; alkyl group having 1 to 4 carbon atoms; alkoxy group having 1 to 4 carbon atoms; at least selected from the group consisting of hydroxy group, alkoxy group having 1 to 4 carbon atoms, sulfonic acid group, and carboxylic acid group. At least one selected from the group consisting of an alkoxy group having 1 to 4 carbon atoms substituted with one group; an alkylsulfonyl group having 1 to 4 carbon atoms; or a hydroxy group, a sulfonic acid group, and a carboxylic acid group. Represents an alkylsulfonyl group having 1 to 4 carbon atoms substituted with a group;
R ₄ and R ₅ are each independently substituted with at least one group selected from the group consisting of an alkylthio group having 1 to 4 carbon atoms; a hydroxy group, a sulfonic acid group, and a carboxylic acid group. Alkylthio groups to 4; alkoxy groups having 1 to 4 carbon atoms; or alkoxy groups having 1 to 4 carbon atoms substituted with at least one group selected from the group consisting of hydroxy groups, sulfonic acid groups, and carboxylic acid groups. Group; represents.
R ₆ is a hydrogen atom; a carboxylic acid group; a sulfonic acid group; an alkylcarbonylamino group having 1 to 4 carbon atoms; a halogen atom; an alkyl group having 1 to 4 carbon atoms; an alkoxy group having 1 to 4 carbon atoms; or a hydroxy group. , An alkoxy group having 1 to 4 carbon atoms substituted with at least one group selected from the group consisting of an alkoxy group having 1 to 4 carbon atoms, a sulfonic acid group, and a carboxylic acid group;
R ₇ represents an anilino group or a naphthylamino group substituted with a sulfonic acid group, and further, a sulfonic acid group; a carboxylic acid group; a phosphoric acid group; a sulfamoyl group; a carbamoyl group; a hydroxy group; an alkoxy having 1 to 6 carbon atoms. Group; Amino group; Mono- or di-alkylamino group with 1 to 6 carbon atoms; Mono- or di-arylamino group; Acetylamino group; Ureid group; Alkyl group with 1 to 6 carbon atoms; Nitro group; Cyano group It may have at least one substituent selected from the group consisting of a halogen atom; an alkylsulfonyl group having 1 to 6 carbon atoms; and an alkylthio group having 1 to 6 carbon atoms.
R ₈ is an anilino group; a naphthylamino group; a mono- or di-alkylamino group having 1 to 6 carbon atoms; a mono- or di-arylamino group; an amino group; an alkylthio group having 1 to 6 carbon atoms; a phenylthio group; It represents a phenoxy group; an alkoxy group having 1 to 6 carbon atoms; or a hydroxy group; and further, a sulfonic acid group; a carboxylic acid group; a phosphoric acid group; a sulfamoyl group; a carbamoyl group; a hydroxy group; an alkoxy group having 1 to 6 carbon atoms. Amino group; mono- or di-alkylamino group with 1 to 6 carbon atoms; mono- or di-arylamino group; acetylamino group; ureido group; alkyl group with 1 to 6 carbon atoms; nitro group; phenyl group; Even if it has at least one substituent selected from the group consisting of a frill group; a pyridyl group; a cyano group; a halogen atom; an alkylsulfonyl group having 1 to 6 carbon atoms; and an alkylthio group having 1 to 6 carbon atoms; Good.
R ₉ represents a heteroaromatic ring or an aromatic ring in which a heteroaromatic ring is bonded via an azo group, and these rings have an alkyl group having 1 to 4 carbon atoms; a sulfonic acid group; a carboxylic acid group; a phosphoric acid. Group; sulfamoyl group; carbamoyl group; hydroxy group; alkoxy group having 1 to 4 carbon atoms; alkoxy group having 1 to 4 carbon atoms substituted with a sulfonic acid group; cyano group; amino group; and alkyl having 1 to 4 carbon atoms. It may have at least one substituent selected from the group consisting of carbonylamino groups; )

The water-based ink according to claim 1, wherein the compound represented by the general formula (1) is a compound represented by the following general formula (2).

(In the general formula (2), R ₁₀ represents an alkyl group having 1 to 4 carbon atoms. R ₁₁ represents a carbamoyl group, a cyano group, an amino group, or an alkylcarbonylamino group having 1 to 4 carbon atoms. ₁₂ represents a hydrogen atom or an alkoxy group having 1 to 4 carbon atoms. M each independently represents a hydrogen atom, an alkali metal, ammonium, or an organic ammonium. A, b, c, and d are independent of each other. It represents an integer of 1 or more and 4 or less, and e represents 1 or 2.)

The water-based ink according to claim 2, wherein the compound represented by the general formula (2) is a compound represented by the following general formula (3).

(In the general formula (3), R ₁₁ represents a carbamoyl group, a cyano group, an amino group, or an alkylcarbonylamino group _{having 1 to 4 carbon atoms. R 12} represents a hydrogen atom or an alkoxy group having 1 to 4 carbon atoms. M represents a hydrogen atom, an alkali metal, ammonium, or an organic ammonium independently. A, b, c, and d independently represent an integer of 1 or more and 4 or less, and e represents 1 or 2. Represents.)

The method according to any one of claims 1 to 3, wherein the content (mass%) of the coloring material in the water-based ink is 0.5% by mass or more and 5.0% by mass or less based on the total mass of the ink. Water-based ink.

Any of claims 1 to 4, wherein the content (mass%) of the first water-soluble organic solvent in the water-based ink is 10.0% by mass or more and 35.0% by mass or less based on the total mass of the ink. The water-based ink according to item 1.

The first water-soluble organic solvent is polyethylene glycol, tetraethylene glycol, bis (2-hydroxyethyl) sulfone, glycerin, triethylene glycol, diethylene glycol, 1,2,6-hexanetriol, ethylene glycol, which have a number average molecular weight of 200. The water-based ink according to any one of claims 1 to 5, which comprises at least one selected from the group consisting of 1,3-propanediol.

The first water-soluble organic solvent according to any one of claims 1 to 6 , which comprises at least one selected from the group consisting of polyethylene glycol, tetraethylene glycol, triethylene glycol, and diethylene glycol having a number average molecular weight of 200. The water-based ink described.

The water-based ink according to any one of claims 1 to 7 , wherein the first water-soluble organic solvent contains bis (2-hydroxyethyl) sulfone.

An ink cartridge including an ink and an ink accommodating portion for accommodating the ink.
An ink cartridge according to any one of claims 1 to 8, wherein the ink is the water-based ink.

An inkjet recording method in which ink is ejected from an inkjet recording head and an image is recorded on a recording medium.
The inkjet recording method, wherein the ink is the water-based ink according to any one of claims 1 to 8.