Suitable polymers may be derived from acrylate monomers including methyl acrylate, ethyl acrylate, butyl acrylate and isodecyl acrylate, methacrylate monomers such as methyl methacrylate, ethyl methacrylate, n-hexyl methacrylate, butyl methacrylate and vinyl acetate monomers and appropriate mixtures thereof as is well known in the art.