Aqueous ink for inkjet and printing method
AssigneesToyo Ink Sc Holdings Co., Ltd., Toyo Ink Co., Ltd.
InventorsYukitoshi Takahashi, Masahiro Sugihara
Life of this patent
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Abstract
To provide an aqueous ink for inkjet which has superior printability to typical printing media, particularly media having high glossiness, such as coated paper, art paper, and vinyl chloride sheets, and which is capable of forming a high quality image by printing. An aqueous ink for inkjet, comprising a pigment, a pigment dispersing resin, an organic solvent, and water, wherein: the organic solvent contains (A) a water-soluble organic solvent having a boiling point of 100° C. or higher and 180° C. or lower, and (B) an organic solvent having a boiling point of 200° C. or higher and 280° C. or lower, and having a surface tension of 20 mN/m or more and 30 mN/m or less.
Claims25
An aqueous ink for inkjet, comprising a pigment, a pigment dispersing resin, an organic solvent, and water, wherein:
- the organic solvent comprises:
- (A) a water-soluble organic solvent having a boiling point of 100° C. or higher and 180° C. or lower, and
- (B) an organic solvent having a boiling point of 200° C. or higher and 280° C. or lower, and having a surface tension of 20 mN/m or more and 30 mN/m or less;
- the pigment dispersing resin has an alkyl group with a carbon atom number of 8 or more;
- an acid value of the pigment dispersing resin is from 150 to 400 mgKOH/g;
- and
- a weight ratio of water-soluble organic solvent (A) and organic solvent (B) is (A):(B)=1:4 to 4:1.
An aqueous ink for inkjet, comprising a pigment, a pigment dispersing resin, an organic solvent, and water, wherein:
- the organic solvent comprises:
- (A) a water-soluble organic solvent having a boiling point of 100° C. or higher and 180° C. or lower, wherein the water-soluble organic solvent (A) comprises at least one selected from the group consisting of propylene glycol monomethyl ether, methoxybutanol, and 3-methyl-3-methoxybutanol, and
- (B) an organic solvent having a boiling point of 200° C. or higher and 280° C. or lower, and having a surface tension of 20 mN/m or more and 30 mN/m or less, wherein the organic solvent (B) comprises an alkanediol-type solvent;
- the pigment dispersing resin has an alkyl group with a carbon atom number of 8 or more;
- an acid value of the pigment dispersing resin is from 150 to 400 mgKOH/g;
- and
- a weight ratio of water-soluble organic solvent (A) and organic solvent (B) is (A):(B)=1:4 to 4:1.
An aqueous ink for inkjet, comprising a pigment, a pigment dispersing resin, an organic solvent, and water, wherein:
- the organic solvent comprises
- (A) a water-soluble organic solvent having a boiling point of 100° C. or higher and 180° C. or lower, wherein the water-soluble organic solvent (A) comprises at least one selected from the group consisting of propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, methoxybutanol, and 3-methyl-3-methoxybutanol and
- (B) an organic solvent having a boiling point of 200° C. or higher and 280° C. or lower, and having a surface tension of 20 mN/m or more and 30 mN/m or less, wherein the organic solvent (B) comprises an alkanediol-type solvent;
- the pigment dispersing resin has an alkyl group with a carbon atom number of 8 or more;
- and an acid value of the pigment dispersing resin is from 150 to 400 mgKOH/g;
- and wherein
- a weight ratio of the water-soluble organic solvent (A) and the organic solvent (B) is (A):(B)=1:4 to 4:1.
Dependencies are inferred from the claim text.