Patent ID: 7402625

Claim:
A composition comprising: a polymer processing aid; and at least one coupling agent having controlled polymer architecture wherein said coupling agent includes polystyrene-b-methacrylic anhydride, polys tryene-b-4-vinylpyridine, polyisoprene-b-methacrylic anhydride, poluisoprene-b-4-vinylpyridine, polybutadiene-b-methacrylic anhydride, polybutadiene-b-4-vinylpyridine, polyethylene-b-methacrylic anhydride, polyethylene-b-4-vinylpyridine, polyethylene-propylene-b-methacrylic anhydride, polyethylene-propylene-b-4-vinylpyridine, polystearylmethacrylate-b-methacrylic anhydride, polystearylmethacrylate-b-4-vinylpyridine, polybehenylmethacrylate-b-methacrylic anhydride, polybehenylmethacrylate-b-4-vinylpyridine and combinations thereof.