Antibacterial polypropylene resin powder used for selective laser sintering and preparation thereof
The technology of polypropylene resin and antibacterial polypropylene is applied in the field of antibacterial polypropylene resin powder and its preparation, which can solve the problems of breeding, spreading and restriction, and achieve the effects of suitable bulk density, small size error and good performance.
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Embodiment 1
[0040] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 35 g / 10 min) and 1000 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.2MPa; then raise the temperature to 120°C, and keep the temperature at this temperature for 60 minutes; after the end of the constant temperature, cool down to 80°C with cooling water at a rate of 1.0°C / min, and keep the temperature at this temperature for 60 minutes; continue Decrease to 25°C at a rate of 1.0°C / min, and keep at this temperature for 60 minutes. After adding the zirconium phosphate silver-loaded antimicrobial agent of 0.5 weight fraction in the obtained solid-liquid mixture, the antioxidant 1010 of 0.25 weight fraction and the antioxidant 168 of 0.25 weight fraction, and after the calcium stearate of 0.5 weight fraction, through centrifugation And vacuum drying to obtain antibacterial polypropylene resin powder suitable for selective laser sintering. The particle...
Embodiment 2
[0042] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 55 g / 10 min) and 800 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.3MPa; then raise the temperature to 130°C, and keep the temperature at this temperature for 60 minutes; after the constant temperature is over, the cooling water will drop to 75°C at a rate of 1.0°C / min, and keep the temperature at this temperature for 60 minutes; Decrease to 20°C at a rate of 1.0°C / min and hold at 20°C for 60 minutes. After adding 0.05 weight fraction of zinc pyrithione, 0.25 weight fraction of antioxidant 1010 and 0.25 weight fraction of antioxidant 168, and 1 weight fraction of zinc stearate in the obtained solid-liquid mixture, centrifugation and vacuum After drying, an antibacterial polypropylene resin powder suitable for selective laser sintering is obtained. As measured by a laser particle size analyzer, the particle size of the antibacterial polypropylene...
Embodiment 3
[0044] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 70 g / 10 min) and 1200 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.1MPa; then raise the temperature to 110°C, and keep the temperature at this temperature for 90 minutes; after the constant temperature is completed, cool it down to 25°C with cooling water at a rate of 0.1°C / min, and keep the temperature at this temperature for 90 minutes. After adding 1.5 weight fraction of nano-zinc oxide, 0.1 weight fraction of antioxidant 1010 and 0.1 weight fraction of antioxidant 168, and 0.75 weight fraction of nano-silica in the obtained solid-liquid mixture, centrifugal separation and vacuum drying Finally, the antibacterial polypropylene resin powder suitable for selective laser sintering is obtained. As measured by a laser particle size analyzer, the particle size of the antibacterial polypropylene resin powder obtained in this embodiment is 30-147 μm,...
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