Coloring composition, coloring method, and pigment dispersion

Patent metadata

Field	Value
Publication number	US-12516214-B2
Application number	US-202318115028-A
Country	US
Kind code	B2
Filing date	Feb 28, 2023
Priority date	Mar 1, 2022
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

An aqueous coloring composition contains a metal pigment and water. The metal pigment is metal particles having a surface treated with at least one surface treatment agent, and the surface treatment agent is at least one compound represented by general formula (1) (A1-R1—)P(Q)(OH)2 or (2) (A2-R2—O—)aP(O)(OH)3-a. The volume-average particle diameter D50 of the metal pigment is 9 μm or less.

First claim

What is claimed is:

1 . An aqueous coloring composition comprising:
a metal pigment, an organic solvent, and water, wherein: the metal pigment is metal particles having a surface treated with at least one surface treatment agent; the metal particles are particles formed of aluminum or an aluminum alloy; the organic solvent contains an aromatic monohydric alcohol: the surface treatment agent is at least one compound represented by general formula (1) or (2); and a volume-average particle diameter D50 of the metal pigment is 9 μm or less:
(A 1 -R 1 —)P(O)(OH) 2   (1)

(A 2 -R 2 —O—) a P(O)(OH) 3-a   (2)

where A 1 and A 2 each independently represent a hydrogen atom or a group selected from a carboxyl group, a hydroxyl group, an amino group, and an oxyalkylene-containing group, R 1 and R 2 each independently represent a hydrocarbon group having 12 or more carbon atoms, and a represents an integer of 1 or 2.

2 . The coloring composition according to claim 1 , wherein:
the surface treatment agent includes either a compound represented by formula (1) or a compound represented by formula (2) in which a is represented by 2.

3 . The coloring composition according to claim 1 , wherein:
a percentage of compounds represented by formula (1) in which a is 2 is 5% by mass or more and 90% by mass or less, with a total mass of the surface treatment agent being 100% by mass.

4 . The coloring composition according to claim 1 , wherein:
the volume-average particle diameter D50 of the metal pigment is 3 μm or more and 8 μm or less.

5 . The coloring composition according to claim 1 , wherein:
the volume-average particle diameter D50 of the metal pigment is 1 μm or less.

6 . The coloring composition according to claim 1 , wherein:
for the surface treatment agent, the R 1 or R 2 is a hydrocarbon group having 15 or more and 30 or fewer carbon atoms.

7 . The coloring composition according to claim 1 , wherein:
the coloring composition is a paint composition.

8 . The coloring composition according to claim 1 , wherein:
the metal particles are particles of aluminum-Hey.

9 . The coloring composition according to claim 1 , wherein:
an amount of the surface treatment agent is 1% by mass or more and 50% by mass or less, with a total mass of the metal particles being 100% by mass.

10 . The coloring composition according to claim 1 , wherein:
the metal particles are shaped like flakes.

11 . The coloring composition according to claim 1 , wherein an amount of the organic solvent is 1% to 60% by mass of the total mass of the coloring composition.

12 . The coloring composition according to claim 11 , wherein an amount of the aromatic monohydric alcohol is 0.5% to 40% by mass of the total mass of the coloring composition.

13 . A coloring method comprising:
attaching the coloring composition according to claim 1 to a substrate.

14 . A pigment dispersion for use in preparing the coloring composition according to claim 1 , the pigment dispersion comprising:
the metal pigment.

Assignees

• Seiko Epson Corp

Inventors

• Nakatani Mitsunobu
• Hiruma Kei
• Ushiyama Tomoyuki
• Tsukada Kenta

Classifications

• C08K9/04

  Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} · CPC title

• C08K2201/005

  Additives being defined by their particle size in general · CPC title

• C09C3/08

  Treatment with low-molecular-weight {non-polymer} organic compounds {(C09C3/006, C09C3/048 take precedence)} · CPC title

• C08K2003/0812

  Aluminium · CPC title

• C09D7/20

  Diluents or solvents · CPC title