# US 2018/0022947 A1 · Electron beam curing of water based inkjet inks

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- Number: US 2018/0022947 A1
- Document ID: US20180022947A1
- Status: Published application
- Kind: A1
- Application number: 15/720,281
- Filed: 2017-09-29
- Published: 2018-01-25
- Earliest claimed: 2015-04-06
- Assignees: Comet Technologies USA, Inc.
- Applicants: COMET Technologies USA, Inc.
- Inventors: Stephen C. Lapin
- Web page: https://patentgrep.com/patent/US20180022947A1

## CPC

- C09D 11/102: containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
- B41J 11/0015: {for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114)}
- C09D 11/033: characterised by the solvent
- C09D 11/101: Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
- C09D 11/30: Inkjet printing inks
- D06P 5/2005: {Treatments with alpha, beta, gamma or other rays, e.g. stimulated rays}
- D06P 5/30: Ink jet printing
- 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
- D06P: DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM

## Abstract

Novel water-based electron beam (EB) curable inkjet inks along with printed substrates, drying processes, and printing equipment are disclosed. The inks are effectively dried by EB energy alone or in combination with optional thermal drying.

## Claims

### Claim 1

An ebeam curable ink that is free of a photoinitiator, comprising:
a. an acrylate functional polyurethane dispersion in water,
b. a 3 to 15 mole ethoxylated trimethylol propane triacrylate, and
c. one or more colorants,
d. with the water comprising from 30 to 80% of the ink and being free of a photoinitiator.

### Claim 2

(canceled)

### Claim 3

(canceled)

### Claim 4

(canceled)

### Claim 5

(canceled)

### Claim 6

(canceled)

### Claim 7

(canceled)

### Claim 8

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### Claim 9

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### Claim 10

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### Claim 11

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### Claim 12

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### Claim 13

(canceled)

### Claim 14

(canceled)

### Claim 15

(canceled)

### Claim 16

(canceled)

### Claim 17

(canceled)

### Claim 18

(canceled)

### Claim 19

An ebeam-cured process for inkjet printing on a substrate comprising the acts of:
a. Providing a substrate;
b. Providing an ebeam curable ink that is free of a photoinitiator, and comprising an acrylate functional polyurethane dispersion in water, a 3 to 15 mole ethoxylated trimethylol propane triacrylate, and one or more colorants, with water comprising from 30 to 80% of the ink;
c. Providing an inkjet printing head;
d. Applying the ebeam curable ink to the moving substrate through one or more inkjet printing heads;
e. Moving the substrate through an ebeam reaction chamber, wherein the ebeam reaction chamber comprises one or more chill rolls;
f. Contacting the substrate with the one or more chill rolls while the substrate is moving through an ebeam reaction chamber; and
g. Curing the ebeam curable ink in the ebeam reaction chamber while the moving substrate is contacted with the one or more chill rolls.

### Claim 20 (depends on 19)

The ink drying process of claim 19, wherein the water based ink is effectively dried using the electron system alone without a thermal dryer.

### Claim 21 (depends on 19)

The ink drying process of claim 19, wherein the ink is effectively dried by the electron beam system along with supplemental thermal drying where the duration of the non-porous substrate in the thermal drier and/or temperature of the thermal dryer is reduced compared to a water based inkjet ink that has a similar level of water content but does not contain any water soluble or dispersible acrylate functional monomer, oligomer, or polymer.

### Claim 22

(canceled)

### Claim 23

(canceled)

### Claim 24

(canceled)

### Claim 25

(canceled)

### Claim 26

(canceled)

### Claim 27

(canceled)

### Claim 28 (depends on 21)

The ink drying process of claim 21, wherein the substrate is part of package used to contain a food, pharmaceutical, or personal care product.

### Claim 29

(canceled)

### Claim 30

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### Claim 31

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### Claim 32

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### Claim 33

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### Claim 61

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