Dnp Fine Chemicals Co., Ltd.

Yukiko Ishima

Yukio Sugita

Keishiro Yoshimori

Fumie Yamazaki

Karuna Iwasawa

Katsumi Watanabe

Megumi Oogaki

Ryoma Yasui

Shinichi Yoshimitsu

Ryosuke Kotani

Ryohei Oka

An active energy ray curable ink composition capable of improving curability while maintaining excellent metal-tone glossiness and a printed matter having high design properties and excellent metal-tone glossiness. The ink composition is discharged using an inkjet method, and contains a polymerization initiator, a polymerizable compound, and a brilliant pigment. The polymerization initiator contains an acylphosphine oxide-based polymerization initiator, aminoacetophenone-based polymerization initiator, and thioxanthone-based polymerization initiator. The printed matter includes a brilliant layer containing the brilliant pigment.

Ink composition

An object of the present invention is to provide: a pigment dispersion liquid for inkjet ink, which is stable for a long period of storage and which increases repellency to ink ejection surface. Disclosed is a pigment dispersion liquid for inkjet ink, comprising: a pigment; a pigment dispersing agent; and a compound having an ethylenically unsaturated double bond, wherein the pigment dispersing agent has an amine value of 20 mgKOH/g or less and an acid value of 10 mgKOH/g or less, contains one or more components selected from the group consisting of: a copolymer having a styrene-derived repeating unit, a repeating unit derived from an unsaturated fatty acid having 12 or more carbon atoms, and a repeating unit derived from a polyalkylene oxide having an ethylenically unsaturated double bond; a specific salt of the copolymer and an amine derivative of the copolymer.

Active energy ray-curable inkjet ink composition and printed product

An ink composition for inkjet recording, including: a color material, a binder resin, and an organic solvent, wherein the binder resin contains at least an acrylic-based resin (A), and a copolymer (B) having a constitutional unit derived from a hydroxyalkyl (meth)acrylate, a constitutional unit represented by the formula (I), and a constitutional unit represented by the formula (II), a content ratio by mass of the resin (A) to copolymer (B) is 25/75 to 70/30, and wherein the solvent contains at least a polyalkylene glycol dialkyl ether and a cyclic ester, a content ratio of the cyclic ester is 3 parts by mass or more and 10 parts by mass or less relative to 100 parts by mass of the ink composition, and a content ratio of the ethylene glycol alkyl ether acetate is 5 parts by mass or less relative to 100 parts by mass of the ink composition: 

Ink composition for inkjet recording, method for producing printed material, and printing method

Pigment dispersion liquid for inkjet ink, active energy ray-curable inkjet ink composition, and printed product

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Kanagawa, Japan

Yukiko Ishima