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Scratch-resistant polypropylene composite material and preparation method thereof

A technology of composite material and polypropylene, which is applied in the field of scratch-resistant polypropylene composite materials and its preparation, can solve the problems of impact on mechanical properties, cost increase, and deterioration of mechanical properties, and achieve excellent scratch resistance and good scratch resistance effect, effect of good smell

Pending Publication Date: 2020-07-31
CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For geometric dermatoglyphs with larger texture depth, although the content of scratch resistance agent (≥5%) can be greatly increased, the scratch performance can also be improved, but there are many problems: a. The cost is significant Improvement: the scratch resistance agent is expensive, and increasing the content of the scratch agent means that the cost will increase significantly; b. The mechanical properties are significantly affected: the scratch resistance agent acts as a stress concentration point in the polypropylene composite material, improving the scratch resistance. The content of the scratch agent is also accompanied by the deterioration of the mechanical properties; c. The significant improvement of the odor level: the scratch resistance agent has a greater odor than the polypropylene matrix, and the odor will increase with the increase of the scratch agent content

Method used

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  • Scratch-resistant polypropylene composite material and preparation method thereof
  • Scratch-resistant polypropylene composite material and preparation method thereof
  • Scratch-resistant polypropylene composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1-9 and comparative example 1-4

[0045] (1) Weigh each component according to the ratio in Table 1, add other components except chopped E-glass fiber into the high mixer and dry mix for 1 to 3 minutes to obtain mixture A;

[0046] (2) Add the mixture A into the twin-screw extruder from the main feeding port of the screw, and add the chopped E-glass fiber into the twin-screw extruder from the side feeding port in the middle of the screw, and then granulate and dry after melting and extruding. finished product. The melt extrusion conditions of the twin-screw extruder are: the temperature of the first zone is 90°C, the temperature of the second zone is 200°C, the temperature of the third zone is 200°C, the temperature of the fourth zone is 220°C, the temperature of the fifth zone is 220°C, the temperature of the sixth zone is 220°C, and the temperature of the seventh zone is 220°C. The temperature in the zone is 220°C, the temperature in the eighth zone is 220°C, the temperature in the ninth zone is 220°C, the s...

Embodiment 10

[0048] Preparation process: Weigh each component according to the ratio in Table 1, add each component into the high-speed mixer and mix at high speed for 1-3 minutes, and get the premix after mixing evenly; put the premix in the main body of the twin-screw extruder The feeding port is melted and extruded, granulated and dried to obtain the finished product.

[0049] The conditions of the melt extrusion of the twin-screw extruder are the same as in Example 3.

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Abstract

The invention discloses a scratch-resistant polypropylene composite material and a preparation method thereof. The scratch-resistant polypropylene composite material comprises the following components: 22-89 parts of polypropylene; 5-40 parts of chopped alkali-free glass fibers; 0-8 parts of a polar monomer grafted polymer compatilizer; 5-20 parts of a toughening agent; and 0.5 to 4 parts of a scratch-resistant agent. According to the invention, the chopped alkali-free glass fiber and the scratch-resistant agent are used together; the prepared composite material has excellent scratch resistance, especially for geometric dermatoglyph of which the dermatoglyph texture depth is greater than 100 microns, a very good scratch-resistant effect can be achieved, the purpose of saving cost is achieved, and relatively high mechanical properties and good smell are maintained.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a scratch-resistant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is one of the five general-purpose plastics. It has the characteristics of low cost, easy processing and molding, environmental protection and non-toxicity, and is widely used in automobiles, home appliances and other fields. But at the same time, pure polypropylene materials have disadvantages such as poor rigidity, large shrinkage rate, and poor dimensional stability. To improve these properties, talc powder is usually added for modification, which will lead to poor scratch resistance of polypropylene composite materials. For automotive parts injection-molded with such materials, it is inevitable to be rubbed by hard objects during production, transportation and use, such as scratches from passenger fingernails and shoes, which will affe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L51/06C08L23/08C08L83/04C08K13/04C08K7/14C08K5/134C08K3/04C08K5/20C08K5/526B29C48/92
CPCC08L23/14B29C48/92C08L2205/08C08L2205/06C08L2205/035C08L2205/03C08K2201/003C08K2201/004B29C2948/92704B29C2948/9259C08L51/06C08L23/0815C08L83/04C08K13/04C08K7/14C08K5/1345C08K3/04C08K5/526C08K5/20
Inventor 张宇黄险波叶南飚罗忠富王林陈业中
Owner CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD