Patent Number: 8,796,352

Title: Ultraviolet ray-curable resin composition used in inkjet printing and optical element obtained using same

Abstract: Provided is a material suitable for an optical element, which can be applied by inkjet, has an ultraviolet curable characteristic, and yields a cured product excellent in transparency and hardness and having a refractive index of more than 1.5. Specifically, an optical element excellent in transparency and hardness and having a refractive index of more than 1.5 is obtained by preparing a resin composition including at least: (A) 5 to 45 mass % of a vinyl group-containing copolymer obtained by copolymerization of a divinyl aromatic compound; (B) 55 to 94 mass % of a liquid photocurable polyfunctional (meth)acrylate having two or more (meth)acryloyl groups; (C) 0.97 to 20 mass % of a photopolymerization initiator; and (D) 0.03 to 1 mass % of a surfactant, and applying the resin composition onto a support substrate by inkjet, followed by photocuring.

Inventors: Fujishiro; Koichi (Kisarazu, JP), Kawabe; Masanao (Kitakyushu, JP), Saito; Tohru (Kisarazu, JP), Yoshioka; Takahiro (Kisarazu, JP)

Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.

International Classification: C08F 265/06 (20060101); C08F 212/36 (20060101); C09D 11/101 (20140101); B29D 11/00 (20060101); C08F 212/08 (20060101)

Expiration Date: 8/05/12018