Sodium Styrene/Methoxy PEG-10 Maleate/Nonoxynol-10 Maleate/Acrylates Copolymer is the sodium salt of a polymer of styrene, methoxy PEG-10 maleate, nonoxynol-10 maleate and a monomer consisting of acrylic acid, methacrylic acid or one of their simple esters.