低粘度高性能不饱和聚酯树脂系统WHUT-UPR

While no one questions any longer that “green” is good, resin suppliers are facing — and providing a variety of solutions to — the question “what constitutes green?” “Resin formulation is more evolution and materials engineering than some form of chemistry wizardry,” observes Mike Wallenhorst, director of product management for unsaturated polyesters in North America, Ashland Performance Materials (Dublin, Ohio). “Chemistries are constantly evolving to include green aspects 650-251, such as bio-materials and nanotechnology.” Accordingly, resin formulators continue to examine their recipes and, as the following demonstrates, achieve often incremental improvements that accomplish green aims without sacrificing customer-specified performance. To gain the secondary green benefit of potential fuel savings and the ability to haul more bulk product at no additional freight cost 650-180, fabricator Core Molding Technologies (Columbus, Ohio) recently reduced the weight of a Navistar regional-haul truck hood assembly from 100 lb to 79 lb (45 kg to 36 kg) using its custom-compounded sheet molding compound (SMC), commercialized as Nano-Lite. For the hood, the recipe included low-mass, nanofilled polyester and proprietary low-profile additives, Wallenhorst explains. In the formulation, Ashland’s AROTRAN 720 polyester is used in the hood’s Class A outer skin 646-563, but toughened AROTRAN 740 better suits the non-Class A reinforcement panels underneath. The filler ratio encompasses mineral, nanoclay, and one-inch long chopped glass roving at 20, 3 and 39 percent, respectively.