Sodium Methacrylate/PEG/PPG-45/15 Hydroxypropyl Methacrylate Copolymer is a copolymer of the sodium salt of Methacrylic Acid and the alkoxylated derivative of Hydroxypropyl Methacrylate which has been reacted with a mixture of approximately 45 mols of ethylene oxide and 15 mols of propylene oxide.