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.

Abstract: 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/mm2 respectively.

Abstract: The invention provides a pressure-sensitive adhesive composition including: an acrylic copolymer (A) containing 40% to 80% by mass of a constituent unit derived from a (meth)acrylic acid alkyl ester having a C1-5 alkyl group, 10% to 59.9% by mass of a constituent unit derived from a (meth)acrylic acid alkyl ester having a C6-18 alkyl group, and 0.1% to 10% by mass of a constituent unit derived from a monomer having a hydroxyl group; a polyoxyalkylene group-containing copolymer (B) having a weight average molecular weight of 3,000 to 100,000 and containing 60% by mass or less of a constituent unit derived from a polyoxyalkylene group-containing monomer having an average addition mole number of alkylene oxide units of 20 or more; an alkali metal salt (C); and a dimethylpolysiloxane compound (D) having a polyoxyalkylene group in a molecule and having an HLB value of 9 or less.

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.

Abstract: 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 comprising 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/mm2 respectively.