DISPERSANT, DISPERSION, INK COMPOSITION, AND METHODS OF PREPARATION THEREOF

• US 20180118961A1
• Filed: 10/30/2017
• Published: 05/03/2018
• Est. Priority Date: 10/31/2016
• Status: Active Grant

• Current Assignee: Nissin Chemical Industry Co., Ltd. (Shin-Etsu Chemical Company Limited)
• Original Assignee: Nissin Chemical Industry Co., Ltd. (Shin-Etsu Chemical Company Limited)
• Inventors: NISHIKAWA, Tomoyuki
• Granted Patent: US 10,640,662 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 11/16 Writing inks
• CPC Class Codes: C09D 11/38 characterised by non-macromolecular additives other than solvents, pigments or dyes

Abstract

A novel dispersant contains a specific acetylene glycol and/or a specific acetylene glycol ethoxylate in combination with a specific arylphenol compound. Even when added in a small amount, the dispersant rapidly disperses disperse dyes and pigments and moreover exhibits excellent wettability and antifoaming properties. Dispersions and ink compositions containing the dispersant are also disclosed.

Claims

1. A dispersant comprising:

(A) from 1 to 50 wt % of at least one compound selected from the group consisting of acetylene glycols of formula (1) below

2. The dispersant of claim 1, wherein R in formula (3) is a styryl, benzyl or cumyl group.

3. The dispersant of claim 1 or 2 which is for dispersing a disperse dye or a pigment in an aqueous solvent.

4. A dispersion comprising the dispersant of claim 1 or 2, a disperse dye or pigment or both, and an aqueous solvent.

5. An ink composition comprising the dispersion of claim 4.

6. A method for preparing a dispersion, comprising the step of mixing together and dispersing the dispersant of claim 1 or 2, a disperse dye or pigment or both, and an aqueous solvent.

7. A method for preparing an ink composition, comprising the steps of:

preparing a dispersion by mixing together and dispersing the dispersant of claim 1 or 2, a disperse dye or pigment or both, and an aqueous solvent; and

mixing the dispersion with at least one substance selected from the group consisting of water, water-soluble organic solvents, resins, ultraviolet absorbers, antioxidants, pH adjustors, preservatives and viscosity modifiers.