# US 10,767,065 B2 · Non-aqueous inkjet ink composition

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- Number: US 10,767,065 B2
- Document ID: US10767065B2
- Status: Granted
- Kind: B2
- Application number: 15/748,610
- Filed: 2016-06-01
- Published: 2018-11-15
- Granted: 2020-09-08
- Earliest claimed: 2015-07-30
- Assignees: Sakata Inx Corporation
- Applicants: Sakata Inx Corporation
- Inventors: Yoichi Sato; Okinori Nakashima; Yoshiyuki Aoki; Jun Kinjyo; Takuya Okamoto
- Web page: https://patentgrep.com/patent/US10767065B2

## CPC

- C09D 11/36: based on non-aqueous solvents
- B41M 5/00: Duplicating or marking methods; Sheet materials for use therein (by using light-sensitive materials G03; electrography, magnetography G03G {; repeatedly usable boards or tablets for writing or drawing B43L1/00})
- C09D 11/107: from unsaturated acids or derivatives thereof
- C09D 11/322: Pigment inks
- 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)
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)

## Abstract

An object is to provide a non-aqueous inkjet ink composition offering excellent wettability, fixing property, solid-fill property, anti-mottling property, as well as discharge stability, even when printed at high speed on a matter to be printed whose printing side is constituted by a polyvinyl chloride or ethylene-vinyl acetate copolymer or other vinyl polymer, etc. As means for achieving the object, a non-aqueous inkjet ink composition containing an acrylic resin, a pigment, a pigment dispersant, and an organic solvent, is provided, wherein such non-aqueous inkjet ink composition is characterized by containing, as the organic solvent, a propylene carbonate and a diethylene glycol dialkyl ether, wherein the propylene carbonate is compounded by 5 to 25 percent by mass in the ink composition, while the diethylene glycol dialkyl ether is compounded in a manner providing a ratio of diethylene glycol dialkyl ether/propylene carbonate falls in a range of 3 to 8.

## Claims

### Claim 1

A non-aqueous inkjet ink composition comprising an acrylic resin, a pigment, a pigment dispersant, and an organic solvent, the non-aqueous inkjet ink composition characterized by comprising, as the organic solvent, a propylene carbonate and a diethylene glycol dialkyl ether, wherein:
the acrylic resin contains acrylic resin (A) whose glass transition temperature is in a range of 90 to 110° C. and mass-averaged molecular weight is in a range of 20000 to 40000, and acrylic resin (B) whose glass transition temperature is in a range of 65 to 85° C. and mass-averaged molecular weight is in a range of 50000 to 80000, where a ratio of (A)/(B) is 70 to 90/10 to 30, and
the propylene carbonate is compounded by 5 to 25 percent by mass in the ink composition, and the diethylene glycol dialkyl ether is compounded in a manner providing a ratio of diethylene glycol dialkyl ether/propylene carbonate in a range of 3.0 to 8.0.

### Claim 2 (depends on 1)

The non-aqueous inkjet ink composition according to claim 1, characterized in that the diethylene glycol dialkyl ether is a diethylene glycol ethyl methyl ether and/or diethylene glycol diethyl ether.