Structures and Optical Properties of Resins Containing Several Carboxylic Acids Neutralized with Barium Ion

Monomer composites containing an aromatic carboxylic acid and methacrylic acid (or acrylic acid) partially neutralized with barium compound showed good solubility in chlorostyrene at high barium ion concentrations, unlike composites containing only one carboxylic acid. The improved solubility was due to the presence of an ionic crosslinked composed of the aromatic carboxylate ion and methacrylate(acrylate) ion bridged with a barium ion, which provided an effective structure for depressing the growth of ionic associations.