Patent ID: 8822028

Claim:
An acrylic pressure sensitive removable adhesive comprising an acrylic copolymer formed by copolymerizing a mixture comprising: (A) 70-96.5 weight % of (meth)acrylic acid ester monomer having C1-C14 alkyl group; (B) 0.5-27 weight % of one or more functional group containing monomers selected from the group consisting of epoxy group containing monomer, and cyano group containing monomer; and (C) 1.0-1.98 weight % of a cross-linking agent having 5-13 alkylene oxide groups and acrylate group or vinyl group, based on 100 weight % of the monomers and the cross-linking agent; wherein: (i) said pressure sensitive adhesive is removable from a substrate to which it has been adhered without leaving residue; and (ii) the number average molecular weight of alkylene oxide groups included in the cross-linking agent is 230-572.