Polymers including a methylene beta-ketoester and products formed therefrom

A polymer prepared from a polymerizable composition comprising:

• at least one methylene beta-ketoester monomer having the structural formula:
• wherein R1 and R2 are independently C1-C15 alkyl, C2-C15 alkenyl, halo-(C1-C15 alkyl), C3-C6 cycloalkyl, halo-(C3-C6 cycloalkyl), heterocyclyl, heterocyclyl-(C1-C15 alkyl), aryl, aryl-(C1-C15 alkyl), heteroaryl or heteroaryl-(C1-C15 alkyl), each of which may be optionally substituted by C1-C15 alkyl, halo-(C1-C15 alkyl), C3-C6 cycloalkyl, halo-(C3-C6 cycloalkyl), heterocyclyl, heterocyclyl-(C1-C15 alkyl), aryl, aryl □(C1-C15 alkyl), heteroaryl, C1-C15 alkylthio, hydroxyl, nitro, azido, cyano, acyloxy, carboxy, or ester;
• or
• wherein R1 and R2 are taken together with the atoms to which they are bound to form a 5-7membered heterocyclic ring which may be optionally substituted by C1-C15 alkyl, halo-(C1-C15 alkyl), C3-C6 cycloalkyl, halo-(C3-C6 cycloalkyl), heterocyclyl, heterocyclyl-( C1-C15 alkyl), aryl, aryl □(C1-C15 alkyl), heteroaryl, C1-C15 alkoxy, C1-C15 alkylthio, hydroxyl, nitro, azido, cyano, acyloxy, carboxy, or ester;
• and
• wherein the amount of ketals in the polymerizable composition is less than about 100 ppm and/or the amount of latent acid-forming impurities in the polymerizable composition is less than about 100 ppm.