Patent ID: 8153251

Claim:
A pressure-sensitive adhesive composition, which comprises a (meth)acryl-based polymer containing, as a monomer component, 25 to 100% by weight of a (meth)acrylic acid alkylene oxide adduct, 0 to 75% by weight of a (meth)acryl-based monomer having an alkyl group of a carbon number of 1 to 14 other than the adduct, and 0 to 75% by weight of other polymerizable monomer, and an alkali metal salt, and further comprising 0.5-15 parts by weight of a crosslinking agent relative to 100 parts by weight of the (meth)acryl-based polymer, wherein the crosslinking agent is selected from the group consisting of an isocyanate compound, an epoxy compound, a melamine-based resin, a metal chelate compound, and a combination thereof, wherein the pressure-sensitive adhesive composition contains 0.01 to 0.7 parts by weight alkali metal salt per 100 parts by weight (meth)acryl-based polymer; and wherein the mole number of addition of the oxyalkylene unit to (meth)acrylic acid present in the (meth)acrylic acid alkylene oxide adduct is 1 to 30, and wherein an acid value of the (meth)acryl-based polymer is 29 or less.