Ink composition and textile printing method

Patent metadata

Field	Value
Publication number	US-10640665-B2
Application number	US-201515300134-A
Country	US
Kind code	B2
Filing date	Mar 31, 2015
Priority date	Mar 31, 2014
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A pigment ink composition that exhibits good ejectability, particularly after standing in an open environment, and an inkjet textile printing method and a dyeing method using the ink composition. The ink composition for inkjet textile printing includes a pigment, water, a polymeric dispersant, a urethane resin, a water-soluble organic solvent, and a nonionic surfactant.

First claim

The invention claimed is:

1. An ink composition for inkjet textile printing, comprising:
a pigment;
water;
a polymeric dispersant;
a polycarbonate urethane resin;
a water-soluble organic solvent; and
a nonionic surfactant,
wherein the polymeric dispersant is an A-B block polymer obtained from copolymerization by living radical polymerization using a polymerization initiator,
the polymerization initiator is a mixture of an organic tellurium compound represented by formula (1) and an organic ditellurium compound represented by formula (2) or a mixture of an organic tellurium compound represented by formula (1), an azo polymerization initiator, and an organic ditellurium compound represented by formula (2):

wherein R 1 represents a C 1 -C 8 alkyl group, an aryl group, a substituted aryl group, or an aromatic heterocyclic group; R 2 and R 3 represent a hydrogen atom or a C 1 -C 8 alkyl group; and R 4 represents an aryl group, a substituted aryl group, an aromatic heterocyclic group, an acyl group, an amide group, an oxycarbonyl group, or a cyano group; and
(R 1 Te) 2   (2)

wherein, R 1 has the same meaning as that of R 1 in the above formula (1),
the A-B block polymer comprises an A block and a B block,
the A block consists of a monomer represented by formula (3):

wherein, R 5 represents a hydrogen atom and R 6 represents a methyl group, and a monomer represented by formula (3), wherein R 5 represents a n-butyl group, and R 6 represents a methyl group, and
the B block consists of benzyl methacrylate.

2. The ink composition according to claim 1 , wherein, based on the total mass of the ink composition, the pigment is present in an amount of 1% to 15% by mass, the polymeric dispersant is present in an amount of 0.1% to 15% by mass, the polycarbonate urethane resin is present in an amount of 1% to 20% by mass, the water-soluble organic solvent is present in an amount of 10% to 45% by mass, and the nonionic surfactant is present in an amount of 0.01% to 5% by mass, wherein the balance is water.

3. The ink composition according to claim 1 , wherein the water-soluble organic solvent comprises a polyglyceryl ether and a C2-C6 diol.

4. The ink composition according to claim 1 , wherein the ink composition has a surface tension of 20 to 40 mN/m and a viscosity of 2 to 10 mPa·s at 25° C.

5. A method for manufacturing the ink composition according to claim 1 , wherein the polymeric dispersant is an A-B block polymer,
the method comprising:
performing copolymerization by living radical polymerization using a polymerization initiator to obtain the A-B block polymer;
dispersing the pigment in a solution of the polymeric dispersant in the water-soluble organic solvent to obtain a pigment dispersion; and
adding water, the polycarbonate urethane resin, and the nonionic surfactant to the pigment dispersion to obtain the ink composition,
wherein the polymerization initiator is a mixture of an organic tellurium compound represented by formula (1) and an organic ditellurium compound represented by formula (2) or a mixture of an organic tellurium compound represented by formula (1), an azo polymerization initiator, and an organic ditellurium compound represented by formula (2):

wherein R 1 represents a C 1 -C 8 alkyl group, an aryl group, a substituted aryl group, or an aromatic heterocyclic group; R 2 and R 3 represent a hydrogen atom or a C 1 -C 8 alkyl group; and R 4 represents an aryl group, a substituted aryl group, an aromatic heterocyclic group, an acyl group, an amide group, an oxycarbonyl group, or a cyano group; and
(R 1 Te) 2   (2)

wherein, R 1 has the same meaning as that of R 1 in the above formula (1),
the A-B block polymer comprises an A block and a B block,
the A block consists of a monomer represented by formula (3):

wherein, R 5 represents a hydrogen atom and R 6 represents a methyl group and a monomer represented by formula (3), wherein R 5 represents a n-butyl group, and R 6 represents a methyl group,
and the B block consists of benzyl methacrylate.

6. An inkjet textile printing method comprising performing textile printing by ejecting a droplet of the ink composition according to claim 1 onto a recording medium in response to a recording signal.

7. The inkjet textile printing method according to claim 6 , wherein the recording medium is a fiber selected from the group consisting of polyesters, celluloses, polyamides, natural fibers, a fiber blend comprising the fiber, and a fabric comprising the fiber.

8. An inkjet dyeing method comprising performing dyeing by steaming or baking a recording medium subjected to textile printing by the inkjet textile printing method according to claim 6 .

9. The inkjet dyeing method according to claim 8 , wherein the recording medium is steamed or baked at 80° C. to 250° C. for 10 seconds to 30 minutes.

Assignees

• Nippon Kayaku Kk

Inventors

• Seki Motohiro
• Higuchi Hiroko

Classifications

• C09D153/00

  Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers · CPC title

• C08F293/005

  using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent · CPC title

• D06P5/30

  Ink jet printing · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• C09D11/03

  characterised by features other than the chemical nature of the binder · CPC title