To produce a wide range of styrene acrylonitrile (SAN) copolymer with excellent chemical resistance, heat resistance and suitable property for compounding with ABS via the continuous bulk polymerization process using Toyo Engineering Corp. (TOYO) technology.
Styrene monomer, acrylonitrile, a small amount of solvent and additives are fed to the specially designed reactor (1) where the polymerization of the fed mixture is carried out. The polymerization temperature of the reactor is carefully controlled at a constant level to maintain the desired conversion rate. The heat of the polymerization is easily removed by a specially designed heat-transfer system. At the exit of the reactor, the polymerization is essentially complete.
The mixture is preheated (2) and transferred to the devolatilizer (3). Volatile components are separated from the polymer solution by evaporation under vacuum. The residuals are condensed (4) and recycled to the process. The molten polymer is pumped through a die (5) and cut into pellets by a pelletizer (6).
Licensor: Toyo Engineering Corp. (TOYO)