Polypropylene toughening additive
An additive and polypropylene technology, which is applied in the field of polypropylene toughening additives, can solve the problems of decreased rigidity of polypropylene materials, high price, and increased cost of polypropylene materials, and achieve the effects of low cost, wide application, and simple preparation methods
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Embodiment 1
[0051] The preparation of embodiment 1 ethylene polymer composition
[0052] Propane, ethylene and hydrogen are introduced continuously into a loop reactor with a volume of 250 liters. In addition, a silica-supported titanium-magnesium catalyst was introduced into the reactor together with triethylaluminum, and the molar ratio of aluminum in the activator to titanium in the solid component was 20. The loop reactor was operated at a temperature of 95°C and a pressure of 55 Bar. In the loop reactor, the ethylene content in the fluid phase was 1.8 mol % and the ratio of hydrogen to ethylene was 310 mol / kmol. The production rate of polymer was 13.5 kg / h. The polymer produced in the loop reactor had a weight average molecular weight of 40385 g / mol, a molecular weight distribution of 4.76, and a density of 0.956 g / cm 3 .
[0053] The slurry was withdrawn from the loop reactor to a flasher where the pressure was reduced to 3 Bar. The polymer is then directed into a fluidized bed...
Embodiment 2
[0055] The preparation of embodiment 2 ethylene polymer composition
[0056] Propane, ethylene and hydrogen are introduced continuously into a loop reactor with a volume of 250 liters. In addition, a silica-supported titanium-magnesium catalyst was introduced into the reactor together with triethylaluminum, and the molar ratio of aluminum in the activator to titanium in the solid component was 20. The loop reactor was operated at a temperature of 95°C and a pressure of 55 Bar. In the loop reactor, the ethylene content in the fluid phase was 1.8 mol % and the ratio of hydrogen to ethylene was 280 mol / kmol. The production rate of polymer was 13.5 kg / h. The polymer produced in the loop reactor had a weight average molecular weight of 44648 g / mol, a molecular weight distribution of 4.43, and a density of 0.950 g / cm 3 .
[0057] The slurry was withdrawn from the loop reactor to a flasher where the pressure was reduced to 3 Bar. The polymer is then directed into a fluidized bed...
Embodiment 3
[0061] (1) Preparation of Toughened Polypropylene Blend
[0062] Table 1 Raw material composition of toughened polypropylene blend Ⅰ
[0063]
[0064] The homopolypropylene used in this example is produced by Yanshan Petrochemical Co., Ltd., with a brand name of K9935 (melt flow rate under the conditions of 230° C. and 2.16 kg: 3.1 g / 10 min).
[0065] The copolymerized polypropylene used in this example is produced by Korea Petroleum & Chemical Industry Co., Ltd., and its brand name is PP-R BP2000 (melt flow rate under the conditions of 230° C. and 2.16 kg is 0.3 g / 10 min).
[0066] The materials in Table 1 were added to the mixer according to the amount to be mixed, the speed of the mixer was 500 rpm, and the mixing time was 4 minutes; then it was melted and extruded in a twin-screw extruder, and granulated to obtain toughened polymer. Propylene Blends I. The process of twin-screw extruder is: zone 1 180-190℃, zone 2 200-210℃, zone 3 200-210℃, zone 4 210-215℃, zone 5 210...
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