Acrylonitrile is commonly employed as a comonomer with styrene, e.g. acrylonitrile, styrene and acrylate plastics. Styrene acrylonitrile resin is a copolymer plastic consisting of styrene and acrylonitrile. Acrylonitrile butadiene styrene is a common example. ABS is derived from acrylonitrile, butadiene, and styrene. A grafted acrylic ester elastomer is introduced during the copolymerization of styrene and acrylonitrile. TBBPA is also used as an additive in acrylonitrile butadiene styrene (ABS). Amine-terminated butadiene acrylonitrile (ATBN) is also used. Kit Fisto was the first minifigure to not use an acrylonitrile butadiene styrene head. ABS is a terpolymer made by polymerizing styrene and acrylonitrile in the presence of polybutadiene. Acrylamide is prepared by the enzyme-catalyzed hydrolysis of acrylonitrile. Acrylamide can be prepared by the hydrolysis of acrylonitrile. Propene is also used to produce isopropanol (propan-2-ol), acrylonitrile, propylene oxide, and epichlorohydrin. The glycerol route begins with pyrolysis to acrolein, which undergoes ammoxidation to give acrylonitrile. Benzyl alcohol reacts with acrylonitrile to give "N"-benzylacrylamide. A recovery column removes bulk water, and acrylonitrile and acetonitrile are separated by distillation.