# US 2020/0399489 A1 · Ink-Jet Ink Composition

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- Number: US 2020/0399489 A1
- Document ID: US20200399489A1
- Status: Published application
- Kind: A1
- Application number: 16/906,094
- Filed: 2020-06-19
- Published: 2020-12-24
- Earliest claimed: 2019-06-20
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Shuichi KOGANEHIRA; Keigo ANDO; Yoshitaka MIYAJIMA
- Web page: https://patentgrep.com/patent/US20200399489A1

## CPC

- C09D 11/32: characterised by colouring agents
- C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes
- C09D 11/033: characterised by the solvent
- C09D 11/037: characterised by the pigment
- C09D 11/102: containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
- C09D 11/30: Inkjet printing inks
- C09D 11/322: Pigment inks
- C08K 5/1565: Five-membered rings
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A ink-jet ink composition according to the present disclosure contains a colorant, water, a 1,2-alkanediol, and a water-soluble 1,3-dioxolane compound represented by the following formula: where R1 and R2 are independently selected from linear or branched alkyl groups containing one to four carbon atoms and R3 is a hydrogen atom or at least one selected from the group consisting of an ethylene oxide adduct, a propylene oxide adduct, and a butylene oxide adduct and is terminated with a hydrogen atom.

## Claims

### Claim 1

A ink-jet ink composition containing:
a colorant;
water;
a 1,2-alkanediol; and
a water-soluble 1,3-dioxolane compound represented by the following formula:
where R1 and R2 are independently selected from linear or branched alkyl groups containing one to four carbon atoms and R3 is a hydrogen atom or at least one selected from the group consisting of an ethylene oxide adduct, a propylene oxide adduct, and a butylene oxide adduct and is terminated with a hydrogen atom.

### Claim 2 (depends on 1)

The ink-jet ink composition according to claim 1, wherein the 1,2-alkanediol includes a 1,2-alkanediol containing seven or more carbon atoms.

### Claim 3 (depends on 1)

The ink-jet ink composition according to claim 1, wherein the water-soluble 1,3-dioxolane compound represented by Formula (1) is 2,2-dimethyl-1,3-dioxolane-4-methanol or 2-isobutyl-2-methyl-1,3-dioxolane-4-methanol.

### Claim 4 (depends on 1)

The ink-jet ink composition according to claim 1, further containing at least one selected from a water-soluble polyoxyalkylene glyceryl ether and water-soluble polyoxyalkylene trimethylolpropane.

### Claim 5 (depends on 4)

The ink-jet ink composition according to claim 4, wherein the water-soluble polyoxyalkylene glyceryl ether and the water-soluble polyoxyalkylene trimethylolpropane are triols including at least one selected from the group consisting of an ethylene oxide adduct, a propylene oxide adduct, and a butylene oxide adduct.

### Claim 6 (depends on 4)

The ink-jet ink composition according to claim 4, wherein the water-soluble polyoxyalkylene glyceryl ether is one selected from the INCI name PPG-24-Glycereth-24 and the INCI name Glycereth-26 and the water-soluble polyoxyalkylene trimethylolpropane is the INCI name PPG-25-PEG-25 Trimethylolpropane.

### Claim 7 (depends on 4)

The ink-jet ink composition according to claim 4, wherein at least one selected from the group consisting of the water-soluble polyoxyalkylene glyceryl ether, the water-soluble polyoxyalkylene trimethylolpropane, and the water-soluble 1,3-dioxolane compound represented by Formula (1) is derived from a biomass source.

### Claim 8 (depends on 4)

The ink-jet ink composition according to claim 4, wherein the ratio of the mass percentage of at least one selected from the water-soluble polyoxyalkylene glyceryl ether and the water-soluble polyoxyalkylene trimethylolpropane to the mass percentage of the 1,2-alkanediol is 3:1 to 6:1.

### Claim 9 (depends on 1)

The ink-jet ink composition according to claim 1, wherein the ratio of the mass percentage of the water-soluble 1,3-dioxolane compound represented by Formula (1) to the mass percentage of the 1,2-alkanediol is 3:1 to 6:1.

### Claim 10 (depends on 1)

The ink-jet ink composition according to claim 1, wherein the 1,2-alkanediol is 1,2-octanediol.

### Claim 11 (depends on 1)

The ink-jet ink composition according to claim 1, further containing a polysiloxane surfactant represented by the following formula as a surfactant:
where R represents a hydrogen atom or a methyl group, a represents an integer of 2 to 18, m represents an integer of 0 to 70, and n represents an integer of 1 to 8.