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US 9,309,348 B2Granted
Adhesive composition
AssigneeNippon Carbide Industries Co., Inc.
InventorsYosuke Meta, Shinya Hattori, Hiroto Nakano, Akira Kamoi, Naomi Furue
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Abstract
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.
Claims7
An optical film adhesive composition, comprising:
- an acrylic copolymer (A) comprising a carboxyl group;
- an isocyanate compound (B);
- and
- a compound (C) having a hydroxyl group and a rosin skeleton,
- wherein a blending quantity ratio of the compound (C) relative to the isocyanate compound (B) is not less than 0.3 and not more than 3,
- wherein a gel fraction after a crosslinking structure and a multimeric complex are formed is not less than 45% by weight, and
- wherein a ratio of an equivalent of an isocyanate group relative to 1 equivalent of a total of a reactive functional group of the acrylic copolymer (A) is more than 1.
4 more elements
Dependencies are inferred from the claim text.