Polypropylene composition with copper-colored metal texture, and preparation method and application thereof
A polypropylene composition and metal texture technology, applied in the field of modified plastics, can solve the problems of inability to produce metal effects, easy residual monomers in coatings, air pollution in vehicles, etc., and achieve high product yield, low equipment requirements, and good quality. metal texture effect
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Embodiment 1
[0038] A polypropylene composition with a copper-colored metallic texture, the preparation method of which is as follows:
[0039] According to the formula in Table 1, homopolypropylene, flaky copper powder (with a particle size of 8 μm), and titanium dioxide-coated silicate glass (with a purity of 95% and a particle size of 10 μm) were weighed. Mix homopolypropylene, flake copper powder, and color brightener in a mixer for 1 to 3 minutes at a speed of 800 to 1500 rpm to obtain a premix; the premix is melted and extruded by a twin-screw extruder The temperature in each zone of the screw is 190-250°C, and the spray-free polypropylene with paint color is produced by vacuum granulation.
[0040] Evaluate the paint luster and metallic texture of the injection molded samples, and the specific evaluation grades are listed in Table 1.
Embodiment 2
[0042] A polypropylene composition with a copper-colored metallic texture, the preparation method of which is as follows:
[0043] According to the formula in Table 1, homopolypropylene, ethylene-propylene copolymer, talcum powder, flake copper powder (50 μm in particle size), and mica coated with titanium dioxide (98% in purity and 50 μm in particle size) were weighed. Mix polypropylene and ethylene-propylene copolymer in a high-speed mixer for 1 to 3 minutes, then add talc powder, flake copper powder, and titanium dioxide-coated mica and mix for 1 to 3 minutes at a speed of 800 to 1500 rpm Minutes to obtain a premixed material, which is melted and extruded by a twin-screw extruder, the temperature of each zone of the screw is 190-250°C, and vacuum granulated to obtain a spray-free polypropylene with paint color.
[0044] Evaluate the paint luster and metallic texture of the injection molded samples, and the specific evaluation grades are listed in Table 1.
Embodiment 3
[0046] A polypropylene composition with a copper-colored metallic texture, the preparation method of which is as follows:
[0047] According to the formula in Table 1, homopolypropylene, ethylene-octene copolymer, talcum powder, flake copper powder (100 μm in particle size), and mica coated with titanium dioxide (98% in purity and 80 μm in particle size) were weighed. The mixing method and preparation method are the same as in Example 2, and the paint gloss and metallic texture of the injection molded sample are evaluated, and the specific evaluation grades are listed in Table 1.
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