A kind of low-voc polypropylene material and its preparation method and application
A polypropylene material and polypropylene technology, applied in the field of modified polypropylene material, low-VOC, low-acetaldehyde polypropylene material and its preparation, can solve problems such as no solution, and achieve the effect of reducing acetaldehyde content
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Embodiment 1
[0046] A kind of low-VOC polypropylene material, its raw material formula is shown in Table 1, and its preparation method comprises the following steps:
[0047] Add polypropylene, elastomer and dispersant to a low-speed mixer and mix evenly, with a rotation speed of ≤80r / min; then add mineral fillers, lubricants, acid absorbers, antioxidants, and weather-resistant agents for mixing, and finally add molecular sieves. After mixing evenly, add it from the main feeding port of the twin-screw extruder, carry out melt blending, vacuum extrude through the extruder, dry, granulate and classify with the granulator to obtain the low-VOC polypropylene material.
[0048] The aspect ratio of the twin-screw extruder is 48:1, and the temperature of the melting section of the twin-screw extruder is 180°C.
[0049] Among them, the polypropylene used is homopolypropylene, the elastomer is ethylene-butylene copolymer, the dispersant is acetone, the mineral filler is talcum powder, the lubricant...
Embodiment 2
[0051] A kind of low-VOC polypropylene material, its raw material formula is shown in Table 1, and its preparation method is with embodiment 1;
[0052] The aspect ratio of the twin-screw extruder is 48:1, and the temperature of the melting section of the twin-screw extruder is 210°C.
[0053] Among them, the polypropylene used is copolymerized polypropylene, the elastomer is ethylene-hexene copolymer, the dispersant is purified water, the mineral filler is talcum powder, the lubricant is C22 unsaturated aliphatic amide, and the acid absorber is stearic acid A compound of zinc and magnesium oxide in a mass ratio of 1:2, and the antioxidants are hindered phenolic antioxidants (antioxidant 3114) and phosphite antioxidants (antioxidant 168) at a ratio of 1:1 The mass ratio composition, the weather resistance agent is a hindered amine light stabilizer (Chimassorb 944); the molecular sieve is a hydrophobic zeolite molecular sieve with a pore size of 0.2-1 nanometer.
Embodiment 3
[0055] A kind of low-VOC polypropylene material, its raw material formula is shown in Table 1, and its preparation method is with embodiment 1;
[0056] The aspect ratio of the twin-screw extruder is 52:1, and the temperature of the melting section of the twin-screw extruder is 230°C.
[0057] Among them, the polypropylene used is homopolypropylene, the elastomer is ethylene-octene copolymer, the dispersant is a mixture of acetone and purified water at a mass ratio of 1:1, the mineral filler is talcum powder, and the lubricant is C25. Saturated aliphatic amide, the acid absorbing agent is a compound of zinc stearate and zinc oxide at a mass ratio of 1:3, the antioxidant is hindered phenolic antioxidant (antioxidant 1076), phosphite antioxidant The oxygen agent (antioxidant 626) is composed at a mass ratio of 1:1, and the weather resistance agent is a hindered amine light stabilizer (Tinuvin 770); the molecular sieve is a hydrophobic zeolite molecular sieve with a pore size of ...
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