12.01.17
US Patent No. 9,801,795; B2; Colgate-Palmolive Company has patented an oral care composition comprising a phosphate/acrylate co-polymer, a whitening agent, and an orally acceptable carrier. The phosphate/acrylate co-polymer is a co-polymerized product of a mixture of acrylic acid, methacrylic acid, and a mixture of 2-hydroxyethyl methacrylate phosphates.