Pigment dispersion liquid and solvent-based ink composition containing the same

Patent metadata

Field	Value
Publication number	US-2016177115-A1
Application number	US-201615057634-A
Country	US
Kind code	A1
Filing date	Mar 1, 2016
Priority date	Oct 23, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

A pigment dispersion liquid is a pigment dispersion liquid for a solvent-based ink including a base metal pigment and an organic solvent, in which the base metal pigment is subjected to a surface treatment by a fluorine-based compound, and in which the concentration of a fluorine element is from 8 atm % to 35 atm % when an X-ray photoelectron spectroscopy (XPS) analysis of the surface of the base metal pigment is performed.

First claim

What is claimed is:

1 . A pigment dispersion liquid for an ink, comprising:
a base metal pigment; and an organic solvent, wherein the shape of the base metal pigment is plate-shaped, and wherein the base metal pigment is subjected to a surface treatment by a fluorine-based compound, and wherein the concentration of a fluorine element is from 8 atm % to 35 atm % when an X-ray photoelectron spectroscopy (XPS) analysis of the surface of the base metal pigment is performed.

2 . The pigment dispersion liquid according to claim 1 ,
wherein when an XPS analysis of the surface of the base metal pigment is performed, the concentration of phosphorus, sulfur, or nitrogen or the total sum of these elements is 1 atm % or more.

3 . The pigment dispersion liquid according to claim 1 ,
wherein the fluorine-based compound includes one or more constitutional element selected from the group consisting of phosphorus, sulfur, and nitrogen.

4 . The pigment dispersion liquid according to claim 1 ,
wherein the fluorine-based compound has a perfluoroalkyl group.

5 . The pigment dispersion liquid according to claim 4 ,
wherein the number of carbon atoms of the perfluoroalkyl group is from 1 to 6.

6 . The pigment dispersion liquid according to claim 1 ,
wherein when an XPS analysis of the surface of the base metal pigment is performed, the ratio concentration of the fluorine element in atm % to a concentration of oxygen element in atm % is from 0.2 to 1.2.

7 . The pigment dispersion liquid according to claim 1 ,
wherein the base metal pigment includes at least one metal selected from the group consisting of aluminum, iron, copper, nickel, chromium, and an alloy with other metals.

8 . The pigment dispersion liquid according to claim 7 ,
wherein in a case where a base metal included in the base metal pigment is aluminum or an aluminum alloy, when an XPS analysis of the surface of the base metal pigment is performed, the ratio concentration of the fluorine element in atm % to a concentration of an aluminum element in atm % is from 0.2 to 1.1.

9 . The pigment dispersion liquid according to claim 1 ,
wherein the molecular weight of the fluorine-based compound is 1,000 or less.

10 . An ink composition, comprising:
the pigment dispersion liquid according to claim 1 ; an organic solvent; and a resin.

11 . An ink composition, comprising:
the pigment dispersion liquid according to claim 2 ; an organic solvent; and a resin.

12 . An ink composition, comprising:
the pigment dispersion liquid according to claim 3 ; an organic solvent; and a resin.

13 . An ink composition, comprising:
the pigment dispersion liquid according to claim 4 ; an organic solvent; and a resin.

14 . An ink composition, comprising:
the pigment dispersion liquid according to claim 5 ; an organic solvent; and a resin.

15 . An ink composition, comprising:
the pigment dispersion liquid according to claim 6 ; an organic solvent; and a resin.

16 . An ink composition, comprising:
the pigment dispersion liquid according to claim 7 ; an organic solvent; and a resin.

17 . The ink composition according to claim 10 ,
wherein the fluorine-based compound which is adsorbed or bonded to the base metal pigment included in the pigment dispersion liquid and the fluorine-based compound isolated in the ink composition are included, and wherein the content of the fluorine-based compound isolated in the ink composition is from 0.01% by mass to 3% by mass.

18 . A pigment dispersion liquid for an ink, comprising:
a base metal pigment; and an organic solvent, wherein an average diameter of the base metal pigment is in the range of 0.25 μm or more but 3 μm or less, and an average thickness of the base metal pigment is in the range of 1 nm or more but 100 nm or less, and wherein the base metal pigment is subjected to a surface treatment by a fluorine-based compound, and wherein the concentration of a fluorine element is from 8 atm % to 35 atm % when an X-ray photoelectron spectroscopy (XPS) analysis of the surface of the base metal pigment is performed.

19 . An ink composition, comprising:
the pigment dispersion liquid according to claim 18 ; an organic solvent; and a resin.

Assignees

• Seiko Epson Corp

Inventors

• Toyoda Naoyuki
• Terada Masaru
• Takiguchi Hiroshi
• Ogawa Tomohiro
• Denda Atsushi

Classifications

• C09D11/322 Primary

  Pigment inks · CPC title

• C09D11/14

  based on carbohydrates · CPC title

• C09D17/003

  containing an organic pigment (process features in the making of dye stuff preparations C09B67/00) · CPC title

• C09D17/002

  in organic medium (C09D17/003, C09D17/004 take precedence) · CPC title

• C09D17/006

  Metal · CPC title