| 摘要 |
PURPOSE: A method for preparing a styrene-based resin composition continuously is provided, to improve the fluidity and the impact resistance by controlling the reaction temperature and the addition amount of additives at each process. CONSTITUTION: The method comprises the steps of dissolving 4-6 parts by weight of a diene rubber to 15-20 parts by weight of a solvent, 1-4 parts by weight of a lubricant paraffin and 70-80 parts by weight of a vinyl monomer to prepare a rubber solution and supplying the rubber solution into a first reactor continuously; polymerizing the rubber solution at the first reactor with a reaction temperature of 129-135 deg.C and a rotation speed of a stirrer of 120-250 ppm to prepare a polymer with a conversion rate of 10-40 wt%; supplying the reaction solution obtained from the first reactor into a second reactor with a reaction temperature of 130-137 deg.C and a rotation speed 80-120 ppm, a third reactor with a reaction temperature of 147-152 deg.C and a rotation speed 60 ppm, and a fourth reactor with a reaction temperature of 165-170 deg.C and a rotation speed 60 ppm, continuously, to carry out the polymerization until the conversion rate reaches 65-90 wt%; and supplying the reaction solution of the fourth reactor into a devolatilization reactor continuously to separate a rubber component-containing polymer from the unreacted monomer.
|
