Global resin supplier AOC (Collierville, Tenn.) has developed R058, a line of out-of-autoclave (OOA) epoxy vinyl ester resins to meet demand for high-performance composites in aerospace, automotive, wind energy, military, marine and other markets. The R058 series is specifically designed for carbon fiber reinforcements and is said to create lightweight composite parts with exceptional strength-to-weight ratios. The resin is designed to combine the performance of epoxy resins with the processing speed of unsaturated polyester resins. Designed for vacuum infusion and resin transfer molding (RTM), R058 reportedly has excellent mechanical properties and chemical resistance. Other benefits include room temperature cure for laminates as thin as 2 mm/0.08 inch, low viscosity for shorter mold fill times and complete fiber wet-out, low laminate exotherm for improved surface aesthetics, no post-cure requirement and good strength, toughness and chemical resistance over a range of temperatures.