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

Patent metadata

Field	Value
Publication number	US-12545800-B2
Application number	US-202318451339-A
Country	US
Kind code	B2
Filing date	Aug 17, 2023
Priority date	Aug 18, 2022
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A reaction liquid for pigment printing contains a polyvalent metal salt, a cationic polymer, a polyhydric alcohol, an alkali, and water. The alkali is an amine compound, and the reaction liquid is used by ejecting it by ink jet technology.

First claim

What is claimed is:

1 . A reaction liquid for pigment printing, the reaction liquid comprising:
a polyvalent metal salt; a cationic polymer; a polyhydric alcohol; an alkali; and water, wherein: the alkali is an amine compound that is different from the cationic polymer; and the reaction liquid is used by ejecting the reaction liquid by ink jet technology.

2 . The reaction liquid according to claim 1 for pigment printing, wherein
the alkali contains a tertiary amine.

3 . The reaction liquid according to claim 1 for pigment printing, wherein
a pH of the reaction liquid is from 5 to 10.

4 . The reaction liquid according to claim 1 for pigment printing, wherein
a pKa of the alkali is from 7.0 to 11.0.

5 . The reaction liquid according to claim 1 for pigment printing, wherein
an amount of the alkali is from 0.1% to 3.0% by mass of a total amount of the reaction liquid.

6 . The reaction liquid according to claim 1 for pigment printing, wherein
the polyvalent metal salt is a sulfate.

7 . The reaction liquid according to claim 1 for pigment printing, wherein
the polyhydric alcohol is a polyhydric alcohol having a normal boiling point of 250° C. or above.

8 . An ink set comprising:
a textile printing ink jet ink composition containing a pigment, a resin particle, and water; and the reaction liquid according to claim 1 for pigment printing.

9 . A recording method comprising:
an ink attachment step, in which an ink composition is attached to fabric by ink jet technology; and a reaction liquid attachment step, in which the reaction liquid according to claim 1 for pigment printing is attached to the fabric by ink jet technology.

10 . The recording method according to claim 9 , wherein
a time lag between the ink attachment step and the reaction liquid attachment step is 5 seconds or less.

11 . The recording method according to claim 9 , wherein:
the ink jet technology is one in which a main scan, in which recording is performed by moving an ink jet head in a direction perpendicular to a direction of transport of the fabric, is carried out a plurality of times; the reaction liquid for pigment printing and the ink composition are attached to a certain scan area of the fabric through a certain main scan; and the certain scan area is subjected to the certain main scan a plurality of times.

Assignees

• Seiko Epson Corp

Inventors

• Sakuma Daisuke

Classifications

• C09D11/40

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

• C09D11/322

  Pigment inks · CPC title

• D06P5/30

  Ink jet printing · CPC title

• D06P1/445

  Use of auxiliary substances before, during or after dyeing or printing · CPC title

• D06P1/52 Primary

  using compositions containing synthetic macromolecular substances (D06P1/60 takes precedence) · CPC title