Hercolyn® D Hercolyn® D methyl ester of hydrogenated rosin is a light amber liquid resinous tackifier and plasticizer. Being hydrogenated, it has marked resistance to aging. It is given a special steam purification treatment to assure consistent mild odor. Hercolyn D resin is used extensively in fragrance compounds, where it functions as a fixative, carrier, and compatibilizer, and in the formulation of chewing gum base. It is also used as a resinous plasticizer or tackifier in finished products such as lacquers, inks, adhesives, floor tiles, artificial leather, and antifouling paints.