Flame-resistant PC (Polycarbonate)/PBT (Polybutylene Terephathalate)/PET (Polyethylene Terephathalate) alloy and preparation method thereof
A technology of alloys and flame retardants, which is applied in the field of thermoplastic polymer material modification, flame-retardant PC/PBT/PET alloys of high-performance engineering plastics and its preparation, can solve the problems of high cost and poor flame retardancy of alloys, and achieve High cost performance, improved processing fluidity, and shortened molding cycle
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Embodiment 1
[0057] Dry PC, PET and PBT at 110°C for 6 hours, and dry the rest of the additives at 70°C for 12 hours.
[0058] The above dried raw materials were weighed according to the proportion, and weighed: 30kg PC, 20kg PET, 23.2kg PBT, 5kg EMA-GMA, 3kg EMA, 0.2kg antioxidant 1010 and 0.2kg 168, 0.4kg lubricant TAF, 10kg Flame retardant brominated epoxy resin, 8kg zinc borate; then mixed in a high speed mixer for 10 minutes.
[0059] Add the above-mentioned uniformly mixed material into the hopper of the twin-screw extruder, and control the temperature of each section at: 210°C in the first zone, 220°C in the second zone, 230°C in the third zone, 240°C in the fourth zone, 250°C in the fifth zone, and 250°C in the sixth zone 240°C, 240°C in the seventh zone, 250°C in the eighth zone, and the temperature of the head is 250°C; the screw speed is controlled at 300rpm, melted, blended and extruded by a twin-screw extruder, water-cooled, air-dried, pelletized, and finally bagged into flame...
Embodiment 2
[0063] Dry PC, PET and PBT at 110°C for 6 hours, and dry the rest of the additives at 70°C for 12 hours.
[0064] The above-mentioned dried raw materials are weighed according to the proportion, and take: 45kg PC, 15kg PET, 15kg PBT, 4kg EMA-GMA, 3kg EMA, 0.2kg antioxidant 1010 and 0.3kg 168, 0.5kg lubricant TAF, 11kg resistance Fuel agent brominated epoxy resin, 3kg antimony trioxide, 3kg zinc borate; then mix in high-speed mixer for 10 minutes.
[0065] Add the above-mentioned uniformly mixed material into the hopper of the twin-screw extruder, and control the temperature of each section at: 200°C in the first zone, 210°C in the second zone, 220°C in the third zone, 230°C in the fourth zone, 240°C in the fifth zone, and 240°C in the sixth zone 250°C, 250°C in the seventh zone, 240°C in the eighth zone, and the temperature of the head is 240°C; the screw speed is controlled at 250rpm, melted, blended and extruded by a twin-screw extruder, water-cooled, air-dried, pelletized, ...
Embodiment 3
[0069] Dry PC, PET and PBT at 120°C for 5 hours, and dry the rest of the additives at 70°C for 12 hours.
[0070] Weigh the above-mentioned dried raw materials according to the proportion, and take: 45kgPC, 15kgPET, 17.8kg PBT, 6kg EMA-GMA, 0.3kg antioxidant 1076 and 0.3kg 168, 0.6kg lubricant PETS, 10kg flame retardant brominated Epoxy resin, 5kg antimony trioxide; then mixed in a high-speed mixer for 10 minutes.
[0071] Add the above-mentioned uniformly mixed material into the hopper of the twin-screw extruder, and control the temperature of each section at: 210°C in the first zone, 220°C in the second zone, 230°C in the third zone, 240°C in the fourth zone, 250°C in the fifth zone, and 250°C in the sixth zone 240°C, 240°C in the seventh zone, 240°C in the eighth zone, head temperature 250°C; the screw speed is controlled at 250rpm, melted, blended and extruded by a twin-screw extruder, water-cooled, air-dried, pelletized, and finally bagged into flame retardant PC / PBT / PET...
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