Reaction solution for pigment printing, ink set, and recording method

Patent metadata

Field	Value
Publication number	US-12473452-B2
Application number	US-202318177201-A
Country	US
Kind code	B2
Filing date	Mar 2, 2023
Priority date	Mar 3, 2022
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A reaction solution for pigment printing according to an embodiment of the present disclosure contains a polyvalent metal salt, a cationic polymer, a polyhydric alcohol having a standard boiling point of 250° C. or higher, and water, and is used by being ejected by an ink jet method.

First claim

What is claimed is:

1 . A reaction solution for pigment printing, comprising:
a polyvalent metal salt; a cationic polymer; a polyhydric alcohol having a standard boiling point of 250° C. or higher; a polyhydric alcohol having a standard boiling point of 230° C. or lower; and water, wherein the reaction solution for pigment printing is used by being ejected by an ink jet method; and a content of the polhydric alcohol having a standard boiling point of 250° C. or higher with respect to the total amount of the reaction solution is denoted as M 1 , a content of the polyhydric alcohol having a standard boiling point of 230° C. or lower with respect to the total amount of the reaction solution is denoted as M 2 , and a content ratio (M 2 /M 1 ) is 01 to 30.0.

2 . The reaction solution for pigment printing according to claim 1 , wherein
the cationic polymer has a structure derived from epihalohydrin.

3 . The reaction solution for pigment printing according to claim 1 , wherein
a content of the cationic polymer is 0.5% to 5.0% by mass with respect to a total amount of the reaction solution.

4 . The reaction solution for pigment printing according to claim 1 , wherein
the polyvalent metal salt is a magnesium salt.

5 . The reaction solution for pigment printing according to claim 1 , wherein
a content of the polyhydric alcohol having a standard boiling point of 250° C. or higher is 3% by mass or more with respect to a total amount of the reaction solution.

6 . The reaction solution for pigment printing according to claim 1 , wherein,
when the content of the polyhydric alcohol having a standard boiling point of 250° C. or higher with respect to the total amount of the reaction solution is denoted as M 1 and a content of the cationic polymer with respect to the total amount of the reaction solution is denoted as M 3 , a content ratio (M 1 /M 3 ) is 0.5 to 50.0.

7 . The reaction solution for pigment printing according to claim 1 , wherein,
when the content of the cationic polymer with respect to the total amount of the reaction solution is denoted as M 3 , and a content of the polyvalent metal salt with respect to the total amount of the reaction solution is denoted as M 4 , a content ratio (M 3 /M 4 ) is 0.1 to 4.0.

8 . The reaction solution for pigment printing according to claim 1 , wherein
a viscosity of the reaction solution for pigment printing is 2 to 10 mPa-s.

9 . The reaction solution for pigment printing according to claim 1 , wherein
a pH of the reaction solution for pigment printing is 4.5 or higher.

10 . The reaction solution for pigment printing according to claim 1 , further comprising:
an alkaline compound, wherein, when a content of the alkaline compound with respect to the total amount of the reaction solution is denoted as M 5 , and the content of the cationic polymer with respect to the total amount of the reaction solution is denoted as M 3 , a content ratio (M 5 /M 3 ) is 0.1 to 1.0.

11 . An ink set comprising:
a printing ink jet ink composition containing a pigment, resin particles, and water; and the reaction solution for pigment printing according to claim 1 .

12 . A recording method comprising:
an ink adhering step of adhering an ink composition to a fabric by an ink jet method; and a reaction solution adhering step of adhering the reaction solution for pigment printing according to claim 1 to the fabric by an ink jet method.

13 . The recording method according to claim 12 , wherein
a time difference between the ink adhering step and the reaction solution adhering step is within 5 seconds.

14 . The recording method according to claim 12 , wherein,
in the ink jet method, an ink jet head is moved in a direction perpendicular to a transport direction of the fabric to perform recording and main scanning is performed a plurality of times, the reaction solution for pigment printing and the ink composition are adhered to the same scanning region of the fabric by the same main scanning, and the same main scanning is performed a plurality of times with respect to the same scanning region.

Assignees

• Seiko Epson Corp

Inventors

• Sakuma Daisuke
• Yamada Akiko

Classifications

• C09D11/40

  Ink-sets specially adapted for multi-colour inkjet printing · CPC title

• C09D11/102

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

• C09D11/322

  Pigment inks · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09D11/30

  Inkjet printing inks · CPC title