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1. (WO2018101123) LASER MARKING INK COMPOSITION

Pub. No.:    WO/2018/101123    International Application No.:    PCT/JP2017/041793
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Wed Nov 22 00:59:59 CET 2017
IPC: C09D 11/037
B23K 26/18
Applicants: DIC GRAPHICS CORPORATION
DICグラフィックス株式会社
Inventors: AZECHI Kei
畦地 敬
ISHIBASHI Toshinori
石橋 歳徳
SHICHI Yuuji
志知 祐次
OOTSUBO Takuya
大坪 拓哉
WATANABE Toshio
渡邊 敏生
FUKUDA Yoshiaki
福田 吉成
Title: LASER MARKING INK COMPOSITION
Abstract:
The purpose of the present invention is to provide: a laser marking ink composition that can be applied to packaging materials, particularly food packaging materials, and that exhibits jet-blackness, durability, and visibility due to a high printing density; and a recording agent obtained using the ink composition. A laser marking ink composition containing a polyurethane resin (A) having a weight-average molecular weight of 15,000-100,000 and an infrared laser coloring pigment (B), wherein the laser marking ink composition is characterized in that the content ration between the polyurethane resin (A) and the infrared laser coloring pigment (B) is 1:2.6 to 1:5 in terms of the (A):(B) mass ratio.