Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheets

A pressure-sensitive adhesive layer having antistatic property and low staining property comprising a crosslinked product of a pressure-sensitive adhesive composition comprising:

• a (meth)acryl polymer of monomer components constituted by (i) 25 to 100% by weight of a (meth)acrylic acid alkylene oxide adduct, (ii) 0 to 75% by weight of a (meth)acryl monomer having an alkyl group of a carbon number of 1 to 14 other than the adduct, and (iii) 0 to 75% by weight of other monomers, 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 polymer;
• and wherein the alkali metal salt is coordinated at an ether group of the acrylic acid alkylene oxide adduct, and wherein an acid value of the (meth)acryl-based polymer is 29 or less.