Aqueous ink jet composition

Patent metadata

Field	Value
Publication number	US-11384249-B2
Application number	US-201916365889-A
Country	US
Kind code	B2
Filing date	Mar 27, 2019
Priority date	Mar 28, 2018
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

An aqueous ink jet composition contains at least one disperse dye selected from the group consisting of C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 359, and a styrene maleic acid-based dispersing agent represented by Formula (1).

First claim

What is claimed is:

1. An aqueous ink jet composition, comprising:
at least one disperse dye selected from the group consisting of C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 359;
a substance A which is at least one type of compound selected from the group consisting of a compound represented by the following Formula (2-2), an ethylene oxide adduct of tristyrylphenol, and a derivative of the ethylene oxide adduct of tristyrylphenol:

where one of R 2 and R 3 is —OH, the other is —NR 4 R 5 , where R 4 and R 5 are each independently a hydrogen atom or a hydrocarbon group having 6 or less carbon atoms, and n is an integer of equal to or greater than 1; and
an anionic dispersing agent,
wherein a content of the substance A is in a range of 0.05% to 8.0%, by mass,
a surface tension of the aqueous ink jet composition at 20° C. is in a range of 20 mN/m to 50 mN/m, and
a variation rate of a viscosity of the aqueous ink jet composition after being left to stand for one week in an environment of 60° C. with respect to a viscosity of the aqueous ink jet composition immediately after production is less than 15%.

2. The aqueous ink jet composition according to claim 1 , wherein the anionic dispersing agent is at least one of a compound represented by the following Formula (2-3), a sodium salt of a naphthalene sulfonic acid formalin condensate, and lignin sulfonic acid:

where R 6 is a hydrocarbon group having 4 or less carbon atoms, and n is an integer of equal to or greater than 1.

3. The aqueous ink jet composition according to claim 1 , wherein when a content of the disperse dye is set as XD [% by mass] and a content of the substance A is set as XA [% by mass], a relationship of 0.002≤XA/XD≤1.5 is satisfied.

4. The aqueous ink jet composition according to claim 1 , wherein when a content of the disperse dye is set as XD [% by mass] and a content of the anionic dispersing agent is set as XB [% by mass], a relationship of 0.3≤XB/XD≤2.0 is satisfied.

5. The aqueous ink jet composition according to claim 1 , wherein when a content of the substance A is set as XA [% by mass] and a content of the anionic dispersing agent is set as XB [% by mass], a relationship of 0.002≤XA/XB≤1.5 is satisfied.

6. The aqueous ink jet composition according to claim 1 , wherein a content of the disperse dye is equal to or greater than 0.1% by mass and equal to or less than 30% by mass.

7. The aqueous ink jet composition according to claim 1 , wherein a content of the anionic dispersing agent is equal to or greater than 0.1% by mass and equal to or less than 30% by mass.

8. The aqueous ink jet composition according to claim 1 , wherein the anionic dispersing agent has a weight average molecular weight of equal to or greater than 1,000 and equal to or less than 20,000.

Assignees

• Seiko Epson Corp

Inventors

• Kitada Kenji
• Hayashi Hiroko
• Ikeda Yasunari
• Hokari Hirofumi
• Okamura Hisashi
• Kikuchi Kenta
• Kagami Seiji
• Naito Shinichi

Classifications

• C08K5/42

  Sulfonic acids; Derivatives thereof · CPC title

• C08K5/3415

  Five-membered rings · CPC title

• C09D11/037

  characterised by the pigment · CPC title

• C09D11/107

  from unsaturated acids or derivatives thereof · CPC title

• C09D11/106

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