Doverphos S-480 Tris (2,4-di-tert-butylphenyl) phosphite ICC Industries-Dover Antioxidant >> Phosphite Acrylic/Acrylate Resins Amide Resins Polyurethane Vinyl Coatings >> Powder Coatings Coil Coating Powder coating Tris (2,4-di-tert-butylphenyl) phosphite. Used as a secondary antioxidant in paints and coatings. Antioxidants can be added to powder and coil coating formulations to prevent discoloration and loss of physical properties. Tris (2,4-di-tert-butylphenyl) phosphite. Used as a secondary antioxidant in powder and coil coating formulations. Prevents discoloration and loss of physical properties.