| abstract |
PROBLEM TO BE SOLVED: To provide an excellent contamination resistance such that an increase in adhesive force with time is small, and there is little contamination such as adhesive residue or sticking marks on an adherend at the time of re-peeling, and furthermore, a mechanical stability as an aqueous pressure-sensitive adhesive composition. Provided is a removable water-based pressure-sensitive adhesive composition having excellent properties. SOLUTION: An alkyl (meth) acrylate ester having an alkyl group having 4 to 12 carbon atoms (a1) is 50 to 99.8% by weight, and a carboxyl group-containing unsaturated monomer (a2) is 0.1 to 20% by weight. %, A polyfunctional unsaturated monomer (a3) in an amount of 0.1 to 20% by weight, and another unsaturated monomer (a4) in an amount of 0 to 49.8% by weight. A removable aqueous pressure-sensitive adhesive composition comprising an emulsion [A] obtained by emulsion polymerization in the presence of an emulsifier, and a crosslinking agent [B]. |