# US 10,246,596 B2 · Water-based white pigment ink for ink-jet recording

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- Number: US 10,246,596 B2
- Document ID: US10246596B2
- Status: Granted
- Kind: B2
- Application number: 15/471,216
- Filed: 2017-03-28
- Published: 2017-10-05
- Granted: 2019-04-02
- Earliest claimed: 2016-03-31
- Assignees: Brother Kogyo Kabushiki Kaisha
- Applicants: Brother Kogyo Kabushiki Kaisha
- Inventors: Jun Sakai
- Web page: https://patentgrep.com/patent/US10246596B2

## CPC

- C09D 11/322: Pigment inks
- C09D 11/033: characterised by the solvent
- C09D 11/102: containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
- C09D 11/106: containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D 11/107: from unsaturated acids or derivatives thereof
- 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)

## Abstract

A water-based white pigment ink for ink-jet recording includes a white pigment and water. The ink further includes a first resin emulsion having a tensile elongation from 600% to 1200% as a film, measured in accordance with JIS K 7127 and a second resin emulsion having a maximum tensile stress from 50 MPa to 80 MPa as a film, measured in accordance with JIS K 7127. The solid content (R1) of the first resin emulsion to be added and the solid content (R2) of the second resin emulsion to be added in the total amount of the ink satisfy R1/R2=0.4 to 2.5.

## Claims

### Claim 1

A water-based white pigment ink for ink-jet recording, comprising:
a white pigment; and
water, wherein
the water-based white pigment ink further comprises:
a first resin emulsion having a tensile elongation from 600% to 1200% as a film, measured in accordance with JIS K 7127; and
a second resin emulsion having a maximum tensile stress from 50 MPa to 80 MPa as a film, measured in accordance with JIS K 7127, and
a solid content (R1) of the first resin emulsion to be added and a solid content (R2) of the second resin emulsion to be added in the total amount of the ink satisfy R1/R2=0.4 to 2.5.

### Claim 2 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, satisfying R1/R2=1:0.75 to 1.33.

### Claim 3 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, wherein the first resin emulsion has a tensile elongation from 1000% to 1200% as a film, measured in accordance with JIS K 7127.

### Claim 4 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, wherein
the second resin emulsion has a tensile elongation from 600% to 1200% as a film, measured in accordance with JIS K 7127.

### Claim 5 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, wherein
the first resin emulsion has a maximum tensile stress from 50 M Pa to 80 MPa as a film, measured in accordance with JIS K 7127.

### Claim 6 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, wherein
the white pigment is a hollow particle.

### Claim 7 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, for use in formation of an image on fabric.

### Claim 8 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, wherein
a solid content (P) of the white pigment and the sum of the solid content (R1) and the solid content (R2) (R1+R2) in the total amount of the ink satisfy (R1+R2)/P=0.8 to 3.

### Claim 9 (depends on 8)

The water-based white pigment ink for ink-jet recording according to claim 8, satisfying (R1+R2)/P=1 to 2.

### Claim 10 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, wherein the first resin emulsion is at least one selected from the group consisting of an urethane resin emulsion, an acryl resin emulsion, and a styrene resin emulsion.

### Claim 11 (depends on 1)

The water-based white pigment ink for ink-jet recording according to claim 1, wherein the second resin emulsion is at least one selected from the group consisting of an urethane resin emulsion, an acryl resin emulsion, and a styrene resin emulsion.