PRINTING AGENT, PRINTED FABRIC, AND METHOD FOR PRODUCING PRINTING AGENT

Abstract

Provided is a printing agent including a pigment, a pigment dispersant, water, an organic solvent, and a binder resin, the pigment dispersant being a polymer (A) including an anionic group, the polymer (A) having a solubility in water of 0.1 g/100 ml or less, a number-average molecular weight of 1000 to 6000, and an acid value of 40 to 400 mgKOH/g. Also provided is a printed fabric produced by applying the printing agent on a fabric. The polymer (A) is preferably a polymer represented by General Formula (1) (where A.sup.1 represents a residue of an organolithium initiator; A.sup.2 represents a polymer block including a monomer having an aromatic ring or a heterocyclic ring; A.sup.3 represents a polymer block including an anionic group; n represents an integer of 1 to 5; and B represents an aromatic group or an alkyl group).

Claims

1. A printing agent comprising a pigment, a pigment dispersant, water, an organic solvent, and a binder resin, the pigment dispersant being a polymer (A) including an anionic group, the polymer (A) having a solubility in water of 0.1 g/100 ml or less, a number-average molecular weight of 1000 to 6000, and an acid value of 40 to 400 mgKOH/g.

2. The printing agent according to claim 1, wherein the polymer (A) is a polymer represented by General Formula (1) below, ##STR00002## (where A.sup.1 represents a residue of an organolithium initiator; A.sup.2 represents a polymer block including a monomer having an aromatic ring or a heterocyclic ring; A.sup.3 represents a polymer block including an anionic group; n represents an integer of 1 to 5; and B represents an aromatic group or an alkyl group).

3. The printing agent according to claim 1, wherein the polymer (A) has an acid value of 40 to 190 mgKOH/g.

4. The printing agent according to claim 1, wherein the polymer (A) is a polymer produced by performing living anionic polymerization with a microreactor.

5. The printing agent according to claim 1, wherein the binder resin is a polyurethane resin or a polyacrylic resin.

6. A printed fabric produced by applying, to a fabric, the printing agent according to claim 1.

7. A method for producing a printing agent, the method comprising the following steps conducted in this order: a step in which a dispersion mixture including a polymer (A), a basic compound, a water-soluble organic solvent, and a pigment is prepared, the polymer (A) including an anionic group, the polymer (A) having a solubility in water of 0.1 g/100 ml or less, the polymer (A) being capable of forming microparticles in water when a degree of neutralization of the anionic group achieved by the basic compound is 100%, the polymer (A) having a number-average molecular weight of 1000 to 6000; a step in which the dispersion mixture is mixed with water to form an aqueous pigment dispersion; and a step in which the aqueous pigment dispersion is mixed with a diluent solvent, a binder resin, and an additive for printing agents.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0325] FIG. 1 is a schematic diagram illustrating a microreactor used in the present invention.

REFERENCE SIGNS LIST

[0326] 1: T-MICROMIXER M1

[0327] 2: T-MICROMIXER M2

[0328] 3: T-MICROMIXER M3

[0329] 4: TUBE REACTOR R1

[0330] 5: TUBE REACTOR R2

[0331] 6: TUBE REACTOR R3

[0332] 7: TUBE REACTOR FOR PRECOOLING P1

[0333] 8: TUBE REACTOR FOR PRECOOLING P2

[0334] 9: TUBE REACTOR FOR PRECOOLING P3

[0335] 10: TUBE REACTOR FOR PRECOOLING P4