. . . "The resin selected for the process of the present invention is preferably prepared from emulsion polymerization methods, and the monomers utilized in such processes include styrene, acrylates, methacrylates, butadiene, isoprene, and a monomer with acid functionality, such as acrylic acid, and methacrylic acid, and optional basic olefinic monomers, such as acrylic acid, methacrylic acid, acrylamide" .