Toyo Ink Sc Holdings Co., Ltd.

Toyo Ink Mfg. Co., Ltd.

Hiroki Sugi

Seiji Maeda

Bungo Yasui

Katsuyuki Ueki

The present invention is to provide an adhesive agent composition, including: a main agent containing a polyether polyurethane polyol and a bisphenol A-type epoxy resin; and a curing agent, wherein the polyether polyurethane polyol is obtained by reacting a polyalkylene glycol including repeating units each having a carbon number of 3 or 4 and an alkane diol monomer with an organic diisocyanate at an equivalent ratio (NCO/OH) of 0.7 or more but less than 1, a weight average molecular weight thereof is in the range of 20,000 to 70,000, and an urethane bond equivalent thereof is in the range of 320 to 600 g/eq, and wherein a number average molecular weight of the bisphenol A-type epoxy resin is in the range of 400 to 5,000, and the bisphenol A-type epoxy resin is of a solid state or a semisolid state at normal temperature.

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Tokyo, Japan

Hiroki Sugi