Emulsion Semi batch Copolymerization and Terpolymerization of Optimized Composition of Acrylic Monomers Used as Emulsion Pressure Sensitive Adhesives (EPSAs)

Pressure sensitive adhesives(PSAs) are viscoelastic materials that can adhere to solid surfaces in a short time with an aid of light pressure.1 PSAs are widely used at the industrial scale aslabels, tapes and protective films.2 From the basic research point of view, the tack property of such adhesives is a veryinteresting behavior. Indeed, for the viscoelastic materials to have the property of tack, adhesion must be developed duringthe bonding step and cohesion during debonding step. To balance these conflicting properties, PSAs are generally based on complex formulations, including a polymer base that givescohesion.2 Nevertheless; there is another way of giving these properties to PSAs which is direct synthesis of them bypolymerization processes. In this study, acrylic emulsion latexes were prepared by semibatch emulsion polymerization. The effects of soft monomer/hard monomer composition on the stability of the emulsion polymers synthesized and adhesion performance of final products was investigated