Nippon Carbide Industries Co., Inc.

Akira Kamoi

Hiroto Nakano

Naomi Furue

Shinya Hattori

Shuhei Masuda

Yosuke Meta

Hideki Miyazaki

Masahito Saito

Provided is an adhesive composition for use in an optical film, which is used for adhering an optical film, shows excellent durability even in a high temperature and high humidity environment, and prevents the occurrence of white spots, and also provided is an optical film with an adhesive. The adhesive composition contains (A) an acrylic copolymer containing a reactive functional group, (B) an isocyanate compound, and (C) a compound having a hydroxy group and a rosin skeleton.

Adhesive composition

A pressure-sensitive adhesive composition which is excellent in durability under high temperature and humidity conditions and can thus inhibit bright defect even when applied to a large-sized optical film; a pressure-sensitive adhesive; and an optical film. A pressure-sensitive adhesive composition including an acrylic copolymer (A) bearing a reactive functional group, an acrylic copolymer (B) and an isocyanate compound (C), wherein the quantity of the isocyanate compound (C) is 5 to 30 parts by weight per 100 parts by weight of a mixture of the acrylic copolymer (A) and the acrylic copolymer (B) and the elongation at break and 200% modulus as determined at 25 degrees C. by the tensile test are 300 to 1000% and 0.2 to 3 N/mmrespectively.

Pressure-sensitive adhesive composition, pressure-sensitive adhesive and optical film

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Tochigi, Japan

Akira Kamoi