Patent ID: 11312853

Abstract:
The present invention relates to a polymodal polymer composition having homogeneous as well as heterogeneous particles, formed by radical emulsion polymerization of primarily acrylic acid ester monomers of C2 to C10 alcohols, wherein the homopolymers of these monomers have Tg's below −15° C. The polymer composition is composed of at least two different populations of particles, differing in mean particle size value by at least a factor of 2. Thus, the two different populations of polymer particles in the polymer composition differ with respect to size and monomer composition of the particles. The polymer composition has excellent adhesion on low surface energy substrates such as low density and high density polyethylene and has enhanced resistance to water whitening which is a required specification in filmic label applications. The present invention also relates to a multistage process for producing said polymodal polymer composition having heterogeneous particles, formed by radical emulsion polymerization of primarily acrylic acid ester monomers of C2 to C10 alcohols.