# US 9,752,039 B2 · Thermal ink jet ink composition

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- Number: US 9,752,039 B2
- Document ID: US9752039B2
- Status: Granted
- Kind: B2
- Application number: 14/925,463
- Filed: 2015-10-28
- Published: 2016-02-18
- Granted: 2017-09-05
- Earliest claimed: 2008-03-31
- Assignees: Videojet Technologies Inc.
- Applicants: Videojet Technologies Inc.
- Inventors: Kyle Harvey; Michael Kozee; Linfang Zhu; Casey Robertson; Anthony Selmeczy
- Web page: https://patentgrep.com/patent/US9752039B2

## CPC

- C09D 11/36: based on non-aqueous solvents
- B41J 2/01: Ink jet
- C09D 11/30: Inkjet printing inks
- C09D 11/32: characterised by colouring agents
- C09D 11/328: characterised by dyes
- C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes
- C08K 5/04: Oxygen-containing compounds {(C08K5/0091 takes precedence)}
- C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters
- C08K 5/11: of acyclic polycarboxylic acids
- 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)
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A thermal ink jet ink composition includes at least 50% by weight volatile organic solvent selected from C1-C4 alcohols, C3-C6 ketones, C3-C6 esters, C4-C8 ethers, and mixtures thereof; a colorant; a humectant present in an amount from about 1% to about 30% by weight; from 0.3% to 8% by weight of a binder resin; and not more than 5% by weight water; wherein the ink composition is compatible with components of a thermal ink jet printer.

## Claims

### Claim 1

A thermal inkjet ink composition for inkjet printing, the ink composition comprising at least 50% by weight volatile organic solvent selected from C1-C4alcohols, C3-C6ketones, C3-C6esters, C4-C8ethers, and mixtures thereof; a colorant; a humectant present in an amount from about 1% to about 30% by weight; from 0.3% to 8% by weight of a binder resin; and not more than 5% by weight water; wherein the ink composition is compatible with components of a thermal ink jet printer.

### Claim 2 (depends on 1)

The ink composition of claim 1, wherein the colorant comprises a fluorescent material.

### Claim 3 (depends on 2)

The ink composition of claim 2, wherein the fluorescent material comprises an optical brightener.

### Claim 4 (depends on 2)

The ink composition of claim 2, wherein the fluorescent material is selected from stilbines, bezoxazoles, bisdiphenylethylenes, coumarins, naphthalimides, 1,3,5-trizin-2-yl derivatives, furans, thiophenes, distyryl derivatives, and mixtures thereof.

### Claim 5 (depends on 2)

The ink composition of claim 2, wherein the fluorescent material comprises a benzoxazole.

### Claim 6 (depends on 1)

The thermal ink jet ink composition of claim 1, wherein the one or more binder resins are selected from cellulose nitrate resins, polyamide resins, rosin ester resins, acrylic resins, polyvinyl butyral resins, vinyl resins, polyhydroxystyrene resins, silicone resins, sulfonamide-modified epoxy resins, sulfonamide-modified formaldehyde resins, sulfonamide-modified melamine formaldehyde resins, and combinations thereof.

### Claim 7 (depends on 1)

The thermal ink jet ink composition of claim 1, wherein the one or more binder resins are selected from rosin ester resins, polyhydroxystyrene resins, silicone resins, sulfonamide-modified epoxy resins, sulfonamide-modified formaldehyde resins, sulfonamide-modified melamine formaldehyde resins, and combinations thereof.

### Claim 8 (depends on 1)

The thermal ink jet ink composition of claim 1, wherein the thermal ink jet ink composition has a decap time of at least 60 seconds and a dry time of less than 5 seconds on a non-porous substrate when used in a thermal ink jet print head.

### Claim 9 (depends on 1)

The thermal ink jet ink composition of claim 1, wherein the one or more volatile organic solvents are selected from methanol, ethanol, 1-propanol, acetone, methyl ethyl ketone, methyl n-propyl ketone, ethyl acetate, propyl acetate, butyl acetate, and mixtures thereof.

### Claim 10 (depends on 9)

The thermal ink jet ink composition of claim 9, wherein the one or more volatile organic solvents are selected from methanol, ethanol, methyl ethyl ketone, and mixtures thereof.

### Claim 11 (depends on 10)

The thermal ink jet ink composition of claim 10, wherein the one or more volatile organic solvents comprise methyl ethyl ketone.

### Claim 12 (depends on 11)

The thermal ink jet ink composition of claim 11 wherein the methyl ethyl ketone is present in an amount greater than 70% by weight of the ink composition.

### Claim 13 (depends on 9)

The thermal ink jet ink composition of claim 9, wherein the one or more volatile organic solvents comprise ethanol.

### Claim 14 (depends on 13)

The thermal ink jet ink composition of claim 13 wherein the ethanol is present in an amount greater than 80% by weight of the ink composition.

### Claim 15 (depends on 1)

The thermal ink jet ink composition of claim 1, wherein the one or more volatile organic solvents comprise methyl ethyl ketone and one or both of ethanol and methanol.

### Claim 16 (depends on 1)

The thermal ink jet ink composition of claim 1, wherein the one or more volatile organic solvents are present in an amount at least 70% by weight of the ink composition.

### Claim 17 (depends on 1)

The thermal ink jet ink composition of claim 1, further comprising a humectant present in an amount at least 2% by weight and not more than 30% by weight of the ink composition, wherein the humectant is selected from the group consisting of polyols, glycol ethers, glycol ether acetate, diacetone alcohol, 2-pyrrolidinone, N-methylpyrrolidinone, ethyl lactate, butyl lactate, 1,3-dimethyl-2-imidazolidindione, propylene carbonate, alkyl esters, and mixtures thereof.

### Claim 18 (depends on 1)

A thermal ink jet cartridge including the thermal ink jet ink composition of claim 1.

### Claim 19 (depends on 1)

A printing system comprising the thermal ink jet ink composition of claim 1.