Patent ID: 8835526

Claim:
A polymer that comprises: (a) ethoxyethyl methacrylate monomers and/or ethoxyethyl acrylate monomers that are incorporated in the polymer; (b) one or more hydroxyalkyl methacrylate monomers and/or one or more hydroxyalkyl acrylate monomers that are incorporated in the polymer; and (c) one or more di-functional crosslinking agents that are incorporated in the polymer, and (d) one or more multifunctional crosslinking agents, different from the one or more di-functional crosslinking agents, that are incorporated in the polymer, wherein the total combined weight of the ethoxyethyl methacrylate monomers and the ethoxyethyl acrylate monomers ranges from 87 percent to 98 percent based on the total weight of the dry polymer, and the total combined weight of the one or more hydroxyalkyl methacrylate monomers and the one or more hydroxyalkyl acrylate monomers ranges from 1.5 percent to 12 percent based on the total weight of the dry polymer, and wherein 5 percent or less based on the total weight of the dry polymer of the monomers incorporated in the polymer have aromatic constituents, and wherein the polymer is prepared by polymerization without solvent.