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Polypropylene composition and preparation method and application thereof

A polypropylene composition and polypropylene resin technology, applied in the field of polymer material technology and science, can solve the problems of lack of surface gloss and low temperature resistance of parts, and achieve high low temperature impact resistance, high gloss, low temperature and so on. Effect of Coefficient of Linear Expansion

Active Publication Date: 2014-11-12
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, neither of these two patents introduces the surface gloss and low temperature resistance of the parts.

Method used

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  • Polypropylene composition and preparation method and application thereof
  • Polypropylene composition and preparation method and application thereof
  • Polypropylene composition and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Present embodiment is shown in Table 1 by each raw material formula of polypropylene composition, and its preparation method is to carry out as follows:

[0046] Add polypropylene resin, elastomer, medicinal barium sulfate, superfine high-silicon talc powder, bright lubricant and other additives (antioxidants) to a high-speed mixer and mix for 5 minutes at a mixing speed of 1000r / min, and then pass through a double The screw extruder performs melt blending. The aspect ratio of the twin-screw extruder is 35:1. The processing temperature of the twin-screw extruder is 170°C, 180°C, 190°C, and 190°C from the feeding port to the die mouth. , 190°C, 200°C, 200°C, 200°C, 200°C, 200°C, 210°C, the vacuum degree is 0.6MPa.

[0047] After melting and blending, water-cooling, air-drying, and pelletizing steps, the polypropylene composition with low linear expansion coefficient, high cold resistance and high gloss is obtained.

Embodiment 2

[0049] The present embodiment is shown in Table 1 according to each raw material formula of polypropylene composition, and its preparation process is the same as embodiment 1

Embodiment 3

[0051] The present embodiment is shown in Table 1 according to each raw material formula of polypropylene composition, and its preparation process is the same as embodiment 1

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Abstract

The invention discloses a polypropylene composition and a preparation method and application thereof. The polypropylene composition is characterized in that the polypropylene composition comprises, by weight, 50%-70% of polypropylene resin, 10%-30% of elastic bodies, 5%-20% of high-gloss packing, 5%-30% of mineral packing, 0.1%-2% of bright lubricants and 0.1%-5% of other additives. The polypropylene composition has the advantages of being low in linear expansion coefficient, high in cold resistance, high in gloss and the like, and can be used in inner-layer cup covers of injection molding insulation cups, injection molding household appliance components and injection molding automobile parts.

Description

technical field [0001] The invention belongs to the field of polymer material technology and science, and specifically relates to a modified polypropylene composition, in particular to a polypropylene composition with low linear expansion coefficient, high cold resistance and high gloss, its preparation method and application. Background technique [0002] Polypropylene (PP) has excellent comprehensive performance, abundant raw material sources and relatively low price, and is easy to modify at the same time. Therefore, new materials based on PP emerge in endlessly. application is expanding. However, polypropylene has a large coefficient of linear expansion (CLTE) and poor dimensional stability. After molding, injection molded parts are prone to deformation due to shrinkage, which limits its application in the automotive industry. Therefore, polypropylene for automobiles is generally modified by adding other additives such as inorganic powders, mineral fillers, and elastome...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08L23/08C08K3/30C08K7/20C08K3/34
CPCC08K2201/003C08L23/14C08L2205/025C08L2205/035C08L23/12C08L23/0815C08K13/06C08K9/00C08K2003/3045C08K3/34C08K13/04C08K7/20
Inventor 丁运生王平倪国章高勇孙晓红葛倪林
Owner HEFEI UNIV OF TECH
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