REMOVABLE PRESSURE-SENSITIVE ADHESIVE COMPOSITIONS COMPRISING ACRYLIC BASED EMULSION POLYMERS

摘要

A removable pressure sensitive adhesive composition comprises an acrylic-based emulsion polymer having a gel content of from about 70 to about 90 %. The polymer comprises about 90 to 99.5 parts alkyl acrylate monomers, up to about 2 parts polar monomers and up to about one part of a multifunctional acrylate monomer. The polymer is synthesized in the presence of a combination of anionic and non-ionic emulsifiers wherein the amount of anionic emulsifier exceeds the amount of non-ionic emulsifier. The composition preferably comprises one or more adhesion stabalizers, preferably a plasticizer in an amount of up to about 3 % weight and a protective colloid in an amount of up to about 1 % by weight.