| abstract |
Abstract An abrasion resistant terpolymer comprising from about 25 mole % to about 65 mole % of an alkyl acrylate monomer, the alkyl groups of which have an average of 4 to 12 carbon atoms, from about 10 mole % to about 50 mole % of a strongly polar monomer, and from about 10 mole % to about 50 mole % of a moderately polar monomer selected from cyclic N-vinyl lactams, wherein the strongly polar monomer and the N-vinyl lactam are present in a ratio of from about 0.8 to about 1.2, and the polar monomers are present in a ratio to said alkyl acrylate monomer of from about 0.4:1 to about 0.85:1. |