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Polypropylene composite for automobile bumpers, and preparation method thereof

A technology of composite materials and polypropylene, which is applied in the field of polypropylene composite materials for automobile bumpers and its preparation, can solve the problems of high material cost, small material specific gravity, and poor balance of rigidity and toughness of materials, so as to meet the requirements of high cost performance and increase relative capacitive, high impact strength effect

Inactive Publication Date: 2011-10-05
GUANGZHOU SUPER DRAGON ENG PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material prepared by the above method has a small specific gravity and is easy to form, but the toughness is poor, and EPDM is expensive, and the material cost is very high
[0004] Chinese invention patent application CN101759923A discloses a polypropylene composite material for automobile bumpers and its preparation method, which is filled with ultrafine talc powder, ethylene-1 octene (POE) as a toughening agent, and γ-aminopropyl triethyl Oxysilane (KH550) is used as a compatibilizer, and the prepared material has a good balance of rigidity and toughness, but KH550 has a poor compatibilization effect, and cannot fully exert the toughening function of POE, and the material is not cost-effective
[0005] Chinese invention patent application CN101993563A discloses a method for preparing polypropylene material for automobile bumpers. Maleic anhydride grafts are used as a compatibilizer, and the crystal size is controlled by a nucleating agent NA-11. The prepared material has high fluidity. Good thermal stability, but due to the high modulus and low toughness of the system, the material has poor rigidity-toughness balance

Method used

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  • Polypropylene composite for automobile bumpers, and preparation method thereof
  • Polypropylene composite for automobile bumpers, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0029] Weigh the materials according to the components and weight ratios provided in Table 1. First, mix polypropylene resin, talc, thermoplastic elastomer POE, and propylene-based ternary block copolymer in a high-speed mixer for 10 minutes, and then add antioxidant Agent 1010, antioxidant 168, light stabilizer 770, and processing aid are mixed in a high-speed mixer for 10 minutes, and the temperature is controlled at 55-65°C. After that, the composite material was obtained by melt extrusion and granulation in a twin-screw extruder. The temperature of each section of the extruder was set to 200℃, 210℃, 220℃, 220℃, 220℃, 210℃, and the die temperature was 220℃. The screw speed is 400 rpm.

[0030] The test results are shown in Table 2.

[0031] Table 1: The components and proportions of Example 1-2 (all calculated by weight percentage)

[0032] Component

[0033] Table 2: Example 1-2 test performance (GB)

[0034] Test items

[0035] It can be seen from the above table that the...

Embodiment 3-5

[0037] Weigh the materials according to the components and weight ratio provided in Table 3. First, mix polypropylene resin, talc, thermoplastic elastomer POE, and propylene-based ternary block copolymer in a high-speed mixer for 10 minutes, and then add antioxidant Agent 1010, antioxidant 168, light stabilizer 770, and processing aid are mixed in a high-speed mixer for 10 minutes, and the temperature is controlled at 55-65°C. After that, the composite material was obtained by melt extrusion and granulation in a twin-screw extruder. The temperature of each section of the extruder was set to 200℃, 210℃, 220℃, 220℃, 220℃, 210℃, and the die temperature was 220℃. The screw speed is 400 rpm.

[0038] The test results are shown in Table 4.

[0039] Table 3: The components and proportions of Examples 3-5 (all in weight percentage)

[0040] Component

[0041] Table 4: Example 3-5 Test Performance (GB)

[0042] Test items

[0043] It can be seen from the above table that the performanc...

Embodiment 6-9

[0045] Weigh the materials according to the components and weight ratios provided in Table 5. First, mix polypropylene resin, talc, thermoplastic elastomer POE, and propylene-based ternary block copolymer in a high-speed mixer for 10 minutes, and then add antioxidant Agent 1010, antioxidant 168, light stabilizer 770, and processing aid are mixed in a high-speed mixer for 10 minutes, and the temperature is controlled at 55-65°C. Afterwards, the composite material was obtained by melt-extrusion and granulation in a twin-screw extruder. The temperature of each section of the extruder was set to 200℃, 210℃, 220℃, 220℃, 220℃, 210℃, and the die temperature was 220℃. The screw speed is 400 rpm.

[0046] The test results are shown in Table 6

[0047] Table 5: The components and proportions of Examples 6-9 (all calculated by weight percentage)

[0048] Component

Comparative example 3

Example 6

Example 7

Example 8

Example 9

PP (homopolymer)

19

15

9

18

14

PP (copolymerization)

50

50

50...

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Abstract

The invention discloses a polypropylene composite for automobile bumpers, and a preparation method thereof. The polypropylene composite for automobile bumpers comprises 60-80% of polypropylene resin, 10-20% of inorganic filler, 5-15% of thermoplastic elastomer, 5-10% of compatilizer, 0.1-1% of antioxidant, 0-1% of light stabilizer and 0-1% of processing aid. The preparation method of the polypropylene composite for the automobile bumpers comprises the following steps of: firstly, adding the polypropylene resin, the thermoplastic elastomer, the compatilizer and the inorganic filler into a high-speed mixing machine for uniformly mixing, then adding the antioxidant, the light stabilizer and a lubricant to continuously stir and mix at high speed, and finally adding the uniformly mixed material into a double-screw extruder for extruding and forming to obtain the polypropylene composite. Due to the addition of the compatilizer, compared with the prior art, the automobile bumpers made of the polypropylene composite provided by the invention have higher impact resistance and lower cost and can better meet the requirement of customers for an automobile bumper material with high cost performance.

Description

Technical field [0001] The invention relates to a polypropylene composite material, in particular to a polypropylene composite material for automobile bumpers and a preparation method thereof. Background technique [0002] Polypropylene is widely used in automotive interior and exterior trim parts because of its excellent cost performance, especially in front and rear bumpers of automobiles. Since 1976, the Italian FIAT company used the blend of PP and E / P copolymer to make the world’s first bumper. As a new and inexpensive general-purpose plastic, polypropylene has been widely used in the automotive field. More than 80% of the bumpers are made of TPO material based on polypropylene. Automobile bumper materials require extremely high toughness to ensure that the car can absorb enough energy when it is impacted, thereby ensuring the safety of passengers in the car. In the prior art, the toughening modification of polypropylene materials for automobile bumpers generally adopts th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08L23/08C08K13/02C08K13/04C08K3/34C08K3/26C08K3/30C08K7/14B29C47/92B29C48/92
CPCB29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 郝源增郝建鑫任萍侯智谋
Owner GUANGZHOU SUPER DRAGON ENG PLASTICS
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