DISPERSANT, DISPERSION AND INK COMPOSITION, AND PREPARING METHOD THEREOF

• US 20190330487A1
• Filed: 04/11/2019
• Published: 10/31/2019
• Est. Priority Date: 04/27/2018
• Status: Active Grant

• Current Assignee: Nissan Chemical Industries Limited (Shin-Etsu Chemical Company Limited)
• Original Assignee: Nissan Chemical Industries Limited (Shin-Etsu Chemical Company Limited)
• Inventors: Nishikawa, Tomoyuki
• Granted Patent: US 11,066,568 B2
• Time in Patent Office: Days
• CPC Class Codes: C09D 11/03 characterised by features other than the chemical nature of the binder
• CPC Class Codes: C09D 11/037 characterised by the pigment
• CPC Class Codes: C09D 11/326 characterised by the pigment dispersant
• CPC Class Codes: C09D 11/328 characterised by dyes
• CPC Class Codes: C09D 11/38 characterised by non-macromolecular additives other than solvents, pigments or dyes
• CPC Class Codes: C09D 17/001 in aqueous medium C09D17/003, C09D17/004 take precedence

Abstract

A dispersant, a dispersion and an ink composition including the dispersant, and a method of preparing the dispersion and the ink composition, in which the dispersant includes: (A) 0.5 to 30% by weight of a compound selected from at least one of acetylene glycol represented by the specific formula (1) and an ethoxylated substance of acetylene glycol represented by the specific formula (2); (B) 5 to 98% by weight of a nonionic aryl phenol compound represented by the specific formula (3); and (C) 1 to 70% by weight of an anionic aryl phenol compound represented by the specific formula (4), and wherein the total amount of components (A) to (C) is 100% by weight.

Claims

1. A dispersant comprising:

(A) 0.5 to 30% by weight of a compound selected from at least one of acetylene glycol represented by formula (1);

2. The dispersant according to claim 1, wherein R⁵ and R⁶ in formula (3) and formula (4) are a styryl, a benzyl, or a cumyl group.

3. The dispersant according to claim 1, wherein R⁷ in formula (4) is a phosphate, a sulfonate, or a sulfate.

4. The dispersant according to claim 1, wherein the dispersant is used for dispersing a disperse dye or a pigment in an aqueous solvent.

5. A dispersion comprising a dispersant, a disperse dye and/or a pigment, and an aqueous solvent, wherein the dispersant is the dispersant according to claim 1.

6. An ink composition comprising the dispersion according to claim 5.

7. A method of preparing a dispersion, comprising mixing and dispersing of the dispersant according to claim 1, a disperse dye and/or a pigment, and an aqueous solvent.

8. A method of preparing an ink composition, comprising:

mixing and dispersing of the dispersant according to claim 1, a disperse dye and/or a pigment, and an aqueous solvent to obtain a dispersion; and

mixing of the dispersion with at least one kind of a substance selected from a group of water, a water-soluble organic solvent, resin, an ultraviolet absorber, an antioxidant, a pH adjuster, a preservative, and a viscosity modifier.