A continuous melt polymerization method for high-temperature-resistant nylon comprises the following steps: In a polymerization reactor, add catalyst and semi-aromatic salt, displace air from the reactor, pressurize with gas, heat and stir to initiate condensation reaction; Conducting a prepolymerization reaction; feeding the mixture into the top of a tubular polymerizer, where the prepolymer flows downward to undergo high-temperature, low-pressure polymerization; discharging from the bottom of the tubular polymerizer into a twin-screw extruder for a first continuous melt extrusion thickening reaction; feeding into the twin-screw extruder for a second continuous melt extrusion thickening reaction; water-cooling the extruded resin strip, pelletizing, and drying to complete the product. This method features low prepolymerization temperature, easily controllable prepolymer viscosity, short polymerization time, high production efficiency, excellent mechanical properties, high whiteness, minimal black spots, consistent molecular weight across batches, stable product quality, simple process, zero waste discharge, low cost, and suitability for industrial production.
Country Code: CN
Application Number: CN202210074664.7
