Synthetic Resin AP Acetophenone-folmaldehyde Degussa Aminoplaste / Phenoplaste (UF, MUF) ADHESIVE Acetophenone formaldehyde condensation resin. In the manufacture of adhesives, Synthetic Resin AP acts as a hard resin in combination with soft resins and polychloroprene. But synthetic Resins are also used in isocyanate-based reactive adhesives and in radiation-cured and water-clear adhesives. Acetophenone-formaldehyde condensation resin. Used in isocyanate-based reactive adhesives and in radiation-cured and water-clear adhesives. Acts as a hard resin in combination with soft resins and polychloroprene