A method for preparing antimony trioxide PBT flame-retardant masterbatch, comprising the following steps: A method for preparing antimony trioxide PBT flame-retardant masterbatch, characterized in comprising the following steps: Conveying antimony trioxide powder and carrier resin in proportion via loss-in-weight feeding to a twin-screw extruder or directly to a high-speed mixer, stirring uniformly, then feeding the mixed material into the twin-screw extruder. Subsequently, melting, plasticizing, and extruding within the extruder, followed by pelletizing via granulation equipment, then drying to obtain the finished product. The method for preparing antimony trioxide PBT flame-retardant masterbatch according to the present invention features die blockage resistance, low defect rate, high straight-run yield, and low production cost. It generates no dust, making it environmentally friendly. The resulting antimony trioxide PBT flame-retardant masterbatch contains 70–90% antimony trioxide powder content, making it particularly suitable for use in the engineering plastics processing industry.
Country Code: CN
Application Number: CN202011035457.8
