BMC (Dough Molding Compound) is a fiber-reinforced compound in a thermoset resin matrix, containing mineral fillers and different additives. Thermoset unsaturated polyester is often used as the organic matrix. Other ingredients are added to improve its properties and improve its conversion: catalysts, inhibitors, thermoplastic additives, mold removers, thickeners and pigments.
SMC is a polymeric composite material mainly composed of thermoset resin, mineral fillers and glass fiber reinforcement. The resin used is usually unsaturated polyester. Additional components such as thermoplastic components, catalysts, inhibitors, mold release agents, thickeners and color pigments are used to improve the performance of the final product and the molding process.