Examples of acrylic acid type monomers are acrylates such as methyl acrylate, ethyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, and trimethylolpropane triacrylate; methacrylates such as methyl methacrylate, t-butyl methacrylate, triethyleneglycol dimethacrylate, and trimethylolpropane methacrylate; acrylic acid or methacrylic acid and acrylic acid metal salts.