Pressure sensitive adhesive with improved peel strength and tack

摘要

An aqueous composition suitable for use when dry as a pressure sensitive adhesive including an aqueous emulsion polymer formed by the free radical polymerization of at least one ethylenically unsaturated monomer at a reaction temperature lower than 100 DEG C in the presence of 20-1500 ppm, based on the total weight of the monomer, of an N-oxyl radical, the polymer having a glass transition temperature (Tg) from -80 DEG C to 0 DEG C is provided. Also provided is a method for preparing the emulsion polymer and a method for coating a substrate with an aqueous composition to provide a pressure sensitive adhesive layer on a substrate.