Dnp Fine Chemicals Co., Ltd.

Karuna Iwasawa

Keishiro Yoshimori

Yukiko Ishima

Yasuma Saito

Yoshiya Maegawa

Masaki Inumaru

Katsumi Watanabe

Yuka Orikasa

Koujun Utaka

Ryouhei Oka

Ryohei Oka

Megumi Oogaki

Keita Yoshiyuki

Shinichi Yoshimitsu

An ink composition able to yield a printed adherend having high weathering resistance; wherein, this ink composition is an active energy ray curing type ink composition that is discharged using an inkjet method. The ink composition contains a polymerizable compound, an ultraviolet radiation absorber and an antioxidant. The ultraviolet radiation absorber has a maximum absorption wavelength within the range 315-400 nm. A medium containing the ultraviolet radiation absorber at a concentration of 20 ppm has an absorbance area Ab of 25.0 or more at wavelengths within the range of 315-400 nm.

Ink composition

A non-aqueous ink composition which has superior printing performance, such as continuous discharge stability, and also has excellent storage stability and excellent coloring properties, and with which printed matter having superior durability can be obtained. A non-aqueous ink composition discharged using an inkjet method, the composition containing an organic solvent, a colorant, and a resin, where the resin contains at least one resin selected from the group consisting of acrylic resins, vinyl chloride-vinyl acetate copolymer resins, and cellulose resins, and a resin having intrinsic viscosity at 25° C. of 90 mL/g or more accounts for up to 5 mass % of the entire resin.

Non-aqueous ink composition, inkjet recording method, and method for manufacturing printed matter

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

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Yokohama, Japan

Karuna Iwasawa