Pressure-sensitive adhesive compositions and related aqueous polymer dispersions

A pressure sensitive adhesive composition, comprising an aqueous polymer dispersion with said polymer comprising monomeric units from the polymerization of a monomeric composition comprising:

• a) 75 to 95% by weight of 2-ethylhexyl acrylate,
• b) 2 to 10% by weight of butyl (meth)acrylate,
• c) 0.5 to 3% by weight of styrene,
• d) 0.1 to 2% by weight of (meth)acrylic acid,
• e) 0 to 8% by weight of vinyl acetate,
• f) a monomer different from a), b), c), d) and e) as defined above, said monomer f) comprising hydroxy ethyl acrylate and/or hydroxy ethyl methacrylate,
• g) 0.005% to 0.2% by weight with respect to the total weight of monomers a)+b)+c)+d)+e)+f) of at least one chain transfer agent selected from mercaptans,
• the sum of a)+b)+c)+d)+e)+f) being equal to 100% and with the proviso that said monomeric composition does not comprise any C1-C2 alkyl (meth)acrylate or any monomer containing sulfonic groups or any polymerizable surfactant or any diester of an unsaturated dicarboxylic acid,
• wherein the pressure sensitive adhesive compositoin has a loop tack of 1.1 N or greater when used at −10° C.