High-modulus and ultrahigh-impact polypropylene composite material and its preparation method

A composite material, polypropylene technology, applied in ultra-high impact polypropylene composite materials, polypropylene composite materials, high modulus field, can solve rigidity and heat resistance decline, poor impact resistance, low temperature toughness difficult to meet Requirements and other issues, to achieve the effect of reducing toughness loss, improving rigidity, and excellent low-temperature toughness

Active Publication Date: 2014-07-16
SHANGHAI PRET COMPOSITES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally speaking, polypropylene materials, especially copolymerized polypropylene materials, have good impact resistance, and modified polypropylene toughened by elastomers can obtain ideal room temperature toughness; but at -30°C or even -40°C, etc. Under extreme low temperature conditions, the high glass transition temperature of polypropylene materials determines that its low-temperature impact resistance is poor, and it can only be toughened by elastomers to improve low-temperature toughness
However, only relying on the method of adding a large amount of elastomer to toughen will inevitably lead to a sharp decline in the rigidity and heat resistance of the material, which cannot meet the strength requirements of large injection molded parts; when the content of elastomer is small, although the strength can meet the requirements, the material Toughness, especially low temperature toughness, is difficult to meet the extremely demanding tests of auto parts such as head impact and airbag blasting

Method used

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  • High-modulus and ultrahigh-impact polypropylene composite material and its preparation method
  • High-modulus and ultrahigh-impact polypropylene composite material and its preparation method
  • High-modulus and ultrahigh-impact polypropylene composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 64.5% of polypropylene by weight, 20% of inorganic filler 2, 15% of elastomer 2, 0.1% of Irganox1010, 0.1% of Igrafos168, and 0.3% of Negonox DSTP, and dry mix them in a high-speed mixer for 5 minutes. Then add it to the twin-screw extruder for melt extrusion and granulation. The temperature in the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, twin-screw extrusion Machine speed is 400 rpm. After the particles are dried, they are injection molded on an injection molding machine to prepare samples.

Embodiment 2

[0030] Weigh 59.5% of polypropylene, 20% of inorganic filler 2, 20% of elastomer 2, 0.1% of Irganox1010, 0.1% of Igrafos168, and 0.3% of Negonox DSTP by weight, and dry mix them in a high-speed mixer for 5 minutes. Then add it to the twin-screw extruder for melt extrusion and granulation. The temperature in the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, twin-screw extrusion Machine speed is 400 rpm. After the particles are dried, they are injection molded on an injection molding machine to prepare samples.

Embodiment 3

[0032] Weigh 54.5% of polypropylene, 20% of inorganic filler 2, 25% of elastomer 2, 0.1% of Irganox1010, 0.1% of Igrafos168, and 0.3% of Negonox DSTP by weight, and dry mix them in a high-speed mixer for 5 minutes. Then add it to the twin-screw extruder for melt extrusion and granulation. The temperature in the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, twin-screw extrusion Machine speed is 400 rpm. After the particles are dried, they are injection molded on an injection molding machine to prepare samples.

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Abstract

The invention discloses a high-modulus and ultrahigh-impact polypropylene composite material and its preparation method. The composite material comprises 40-74wt% of polypropylene, 10-30wt% of an ultrafine inorganic filler, 15-30wt% of an elastomer flexibilizer, 0.1-2wt% of a stabilizer, and 0-5wt% of other additives. The preparation method comprises the following steps: carrying out dry mixing on raw materials in a high speed mixer for 3-15min, adding the mixed raw materials into a double screw extruder, carrying out melt extrusion, and carrying out cooling granulation. The preparation method has the following advantages:1, a ethylene-butylene copolymer is used as the elastomer flexibilizer, so the polypropylene composite material has better low temperature toughness than traditional toughening modified polypropylene; 2, ultrafine talcum powder is used as the inorganic filler, so the toughness loss can be reduced as much as possible, and the rigidness of the material is greatly improved; and 3, the synergistic effect of the ultrafine talcum powder and the elastomer flexibilizer is utilized, so the polypropylene composite material has more ideal rigidness-toughness balance than the traditional toughening modified polypropylene.

Description

technical field [0001] The invention relates to a polypropylene composite material, specifically a high-modulus, super-high-impact polypropylene composite material, and a preparation method thereof; belonging to the field of polymer modification and processing. Background technique [0002] In recent years, with the rapid development of the automobile industry, the demand for various plastic parts has increased sharply, among which polypropylene composite materials account for the largest proportion. For some important automotive interior parts such as instrument panels, door panels, and center consoles, in addition to requiring components to have sufficient strength to carry other components installed on the instrument panel or door panels, the parts are also required to have sufficient resistance. Impact performance, in the event of a car collision, no obvious cracks or sharp fragments will be produced, and the safety of drivers and passengers will be protected as much as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/00C08L9/00C08L23/16C08L23/08C08K13/02C08K3/26C08K3/30C08K3/36C08K3/22C08K3/34B29B9/06B29C47/92B29C48/92
CPCB29B9/06B29C48/92B29C2948/9258B29C2948/92704C08K2201/003C08L23/12C08L53/00C08L23/0815C08K13/02C08K3/34B29C48/04B29C48/40B29C2948/9259
Inventor 张锴张鹰张祥福周文郭思斯蔡莹
Owner SHANGHAI PRET COMPOSITES
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