WATER-BASED POLYMER EMULSIONS FOR OPAQUE FILMS AND COATINGS APPLICATIONS ON FLEXIBLE SUBSTRATES

摘要

The present invention comprises the steps of adding a first monomer feed to the reaction vessel in the presence of a first initiator and water to form an acid-functional polymer; Neutralizing the acid-functional polymer to form a particulate polymer; And adding a second monomer feed to the reaction vessel in the presence of a second initiator to form agglomerated polymers, wherein the method is a one-pot method. to be. The first monomer feed comprises an unbranched (meth) acrylate monomer, a (meth) acrylic acid monomer, a branched (meth) acrylate and a styrene monomer, the second monomer feed comprises a hydrophobic monomer, The emulsion comprises agglomerated polymers, the agglomerated polymers comprising particulate polymers, and the agglomerated polymers are in the form of aggregated micronuclei. Agglomerated polymers can be used in high opacity emulsions.