Polychem 7562-X-65 Alkyd resin OPC Polymers Alkyd Resins xylene POLYCHEM 7562-X-65 is a castor based plasticizing alkyd useful in nitrocellulose lacquers and baked enamels in combination with aminoplast resins. Castor oil based plasticizing alkyd resin. Used in nitrocellulose lacquers and baked enamels in combination with aminoplast resins.