| abstract |
A water-based pressure sensitive adhesive composition is disclosed comprising (a) an acrylic emulsion having a glass transition temperature of 20°C or less; (b) an optional dispersant or silane-containing compound; and (c) an ethylene or propylene copolymer emulsion . In some embodiments, each is (a) 75 to 99 wt % of the composition, (b) 0.1 to 5 wt % of the composition, if present, based on the dry weight of the composition, and ( c) 0.1 to 25 wt% of the composition. Also disclosed is a method for preparing a water-based pressure-sensitive adhesive composition, the method comprising: subjecting at least one unsaturated monomer to emulsion polymerization to form an emulsion polymer having a glass transition temperature lower than or equal to -10°C; and blending the emulsion polymer with a dispersant or a silane-containing compound and an ethylene or propylene copolymer emulsion. Also disclosed are water-based pressure sensitive adhesives and pressure sensitive adhesive films. |