Nano talcpowder modified polypropylene composite material and preparation method thereof

A technology of nano talc powder and composite materials, which is applied in the field of high-strength and low-density polypropylene composite materials and high toughness, and can solve the problems of failing to meet the end-use performance requirements of products, limited improvement of material performance, and affecting product performance. Achieve high rigidity and toughness, reduce density and weight, and improve performance

Active Publication Date: 2012-07-04
SHANGHAI PRET COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding a small amount of nano-talc powder has limited improvement in material performance, and often fails to meet the end-use performance requirements of the product; while adding a large amount, nano-sized particles are easy to agglomerate during high-temperature melt blending and affect product performance. would significantly increase material costs

Method used

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  • Nano talcpowder modified polypropylene composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Main components: polypropylene (melt index 20g / 10min), nano talc powder (average particle size 80nm), maleic anhydride grafted polypropylene (grafting rate 0.5%, melt extruded from block copolymerized polypropylene through maleic anhydride modified) 0.5%, Irganox 1010 (tetrakis[β-(3,5-di-tert-butyl 4-hydroxyphenyl) propionate] pentaerythritol ester, Ciba Company) 0.1%, Igrafos 168 (phosphite tris(2, 4-di-tert-butylbenzene), Ciba) ester 0.1%, Negonox DSTP (stearyl thiodipropionate, British ICE company) 0.3%.

[0060] According to the above weight percentages, the main components are dry mixed in a high-speed mixer for 5 minutes, and then added to a twin-screw extruder for melt extrusion and granulation. The third zone is 210°C, the fourth zone is 210°C, the head is 220°C, and the speed of the twin-screw extruder is 400 rpm. The pellets are dried and injection molded on an injection molding machine.

Embodiment 2

[0062] Main components: polypropylene (melt index 20g / 10min) 91%, nano talc powder (average particle size 80nm) 7%, maleic anhydride grafted polypropylene (grafting rate 0.5%) 1.5%, Irganox 1010 (four [ β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol, Ciba) 0.1%, Igrafos 168 (tris(2,4-di-tert-butylphenyl) phosphite, Ciba ) 0.1%, Negonox DSTP (stearyl thiodipropionate, British ICE company) 0.3%.

[0063] Weigh the main components according to the above weight percentage, dry mix them in a high-speed mixer for 5 minutes, and then add them to a twin-screw extruder for melt extrusion and granulation. , 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, and the speed of the twin-screw extruder is 400 rpm. The pellets are dried and injection molded on an injection molding machine.

Embodiment 3

[0065] Main components: polypropylene (melt index 20g / 10min) 81.5%, nano talc powder (average particle size 80nm) 15%, maleic anhydride grafted polypropylene (grafting rate 0.5%) 3%, Irganox 1010 (four [ β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol, Ciba) 0.1%, Igrafos 168 (tris(2,4-di-tert-butylphenyl) phosphite, Ciba ) 0.1%, Negonox DSTP (stearyl thiodipropionate, British ICE company) 0.3%.

[0066] Weigh the main components according to the above weight percentage, dry mix them in a high-speed mixer for 5 minutes, and then add them to a twin-screw extruder for melt extrusion and granulation. ℃, 210 ℃ in the third zone, 210 ℃ in the fourth zone, 220 ℃ in the head, and the speed of the twin-screw extruder is 400 rpm. The pellets are dried and injection molded on an injection molding machine.

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Abstract

The invention provides a nano talcpowder modified polypropylene composite material and a preparation method thereof. A nano-scale talcpowder filler is added and a proper amount of traditional micro-scale talcpowder is added for synergistic modification of polypropylene, an agglomeration phenomenon of the nano filler is avoided to the greatest extent by a special feed and extrusion process, and the composite material with higher comprehensive performance and wider application range is obtained under the conditions of relatively low material density and cost.

Description

technical field [0001] The invention relates to a polypropylene composite material, in particular to a polypropylene composite material with high toughness, high strength and low density, and a preparation method thereof. Background technique [0002] Polypropylene is widely used in corrosion-resistant and insulating parts such as interior and exterior trim parts of automobiles, shells of electronics and home appliances, etc. because of its abundant raw materials, low price and good comprehensive performance. It is currently the fastest growing general-purpose thermoplastic. However, polypropylene also has disadvantages such as low rigidity, poor heat resistance, and large shrinkage rate. Usually, the method of adding inorganic fillers is used to improve the rigidity of polypropylene. [0003] For example, the polypropylene composite material disclosed in patent CN1226342C uses barium sulfate for reinforcement, the composite material disclosed in CN101864108A uses wollastoni...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L53/00C08K13/02C08K3/34B29B9/06B29C47/92B29C48/92
Inventor 张锴张鹰张祥福周文
Owner SHANGHAI PRET COMPOSITES
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