IP Library › Granted Patent US 12,435,232
Granted Patent B2
US 12,435,232 · App. 17/766,211 · Granted Oct 7, 2025

Nonaqueous inkjet ink composition

Inventors: Okinori Nakashima (Osaka, JP); Yoshiyuki Aoki (Osaka, JP); Ryohei Miyake (Osaka, JP); Koki Ogasahara (Osaka, JP)
Assignee: SAKATA INX CORPORATION
C09D11/36C09D11/326C09D11/40
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Quick Facts
Patent No.
US 12,435,232
App. No.
17/766,211
Granted
Oct 7, 2025
Kind
B2
Abstract

An object is to provide a nonaqueous inkjet ink composition offering excellent solid filling property and anti-mottling property, as well as excellent ink stability, discharge stability, and scratch resistance, even when printed at high speed on printing targets whose printing face is constituted by a polyvinyl chloride, ethylene-vinyl acetate-based copolymer, or other vinyl-based polymer, etc. As a solution, a nonaqueous inkjet ink composition is provided that contains acrylic-based resin, organic coloring pigment and/or carbon black, alumina, pigment dispersant, and organic solvent, wherein the organic solvent comprises propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate, and alumina is contained by 5 to 30 parts by mass relative to 100 parts by mass representing the total of organic coloring pigment and carbon black.

Claims (5)

1. A nonaqueous inkjet ink composition containing acrylic-based resin, organic coloring pigment and/or carbon black, alumina, pigment dispersant, and organic solvent, wherein:

the organic solvent comprises propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate; and

alumina is contained by 5 to 30 parts by mass relative to 100 parts by mass representing a total of organic coloring pigment and carbon black.

2. The nonaqueous inkjet ink composition according to claim 1 , wherein the diethylene glycol dialkyl ether comprises diethylene glycol ethyl methyl ether and/or diethylene glycol diethyl ether.

3. The nonaqueous inkjet ink composition according to claim 1 , wherein a mass ratio of diethylene glycol dialkyl ether to propylene carbonate is 1.0 to 15.0.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 1, 2022
From: NAKASHIMA, OKINORI; AOKI, YOSHIYUKI; MIYAKE, RYOHEI; OGASAHARA, KOKI
To: SAKATA INX CORPORATION
Reel/Frame 059478/0189 →
Priority Claims (1)
JP 2019-197475 · Oct 30, 2019 · national
Continuity (1)
Related Publication 20230046096A1 · Feb 16, 2023
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