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Polypropylene material for automotive bumper and method for preparing same

A polypropylene material, automobile bumper technology, applied in bumpers and other directions, can solve problems such as poor impact resistance, reduced automobile safety performance, and large volume change, and achieve enhanced impact resistance, excellent mechanical properties, and small volume changes. Effect

Active Publication Date: 2009-01-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modification process of the existing polypropylene material is complicated, and the impact resistance of the material is poor, which increases the risk of drivers and passengers
[0003] Chinese invention patent application CN1566196A discloses a new type of polypropylene composite material, which is composed of the following components by weight: copolymerized polypropylene pellets 25-60, thermoplastic elastomer 5-20, high-density polyethylene 0-20, Mineral filler 0-40, polar polymer material 0-10, anti-heat oxidant 0.1-0.6, coupling agent 0.1-0.3, light stabilizer 0.1-0.3, which have strong adhesion, but the volume change of the material is relatively small Large, poor impact resistance; and poor fluidity during molding, complicated preparation process
[0004] Chinese invention patent CN1235989A discloses a paintable modified polypropylene composition, which contains 100 parts of polypropylene, 10-50 parts of rubber-type toughening agent, 5-15 parts of oligomer, 5-20 parts Parts of grafted modified polypropylene, 1-15 parts of inorganic fillers, which are uniformly mixed with the above-mentioned various materials in proportion, melted and blended at a processing temperature of 180-220°C, and then extruded into pellets or internal mixer It is produced by granulation; the impact strength of the composition prepared by the above method is up to 629.6J / m, and when it is used as a material for preparing automobile bumpers, its impact strength is not high enough to absorb more impact energy , thereby reducing the safety performance of the car

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Polypropylene material: 60 parts of copolymerized polypropylene, 15 parts of EPDM, 15 parts of talcum powder, 3 parts of paraffin wax, 0.2 parts of antioxidant 1010, 0.3 parts of aluminum-zirconate coupling agent, sodium oleate 5 parts, 0.1 part of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate;

[0029] Preparation method: step a: heat the mixer to 90°C, add inorganic filler talc powder, lubricant paraffin, antioxidant 1010, aluminum-zirconate coupling agent, volume stabilizer sodium oleate and light stabilizer Bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, mixed and stirred for 20 minutes, added copolymerized polypropylene and thermoplastic elastomer ternary isopropyl rubber EPDM, continued to stir for 3 Minutes to prevent the material from agglomerating and to obtain the mixed material;

[0030] Step b: Add the mixed material prepared in step a into the extruder, control the feeding speed to 10 rpm, the screw speed to 120 rpm, and the temperature of the extrusion...

Embodiment 2

[0032] Polypropylene material: 70 parts of block polypropylene, 10 parts of ethylene propylene rubber, 30 parts of calcium carbonate, 10 parts of white oil, 0.8 parts of antioxidant 168, 0.5 parts of aminopropyl triethoxysilane, 10 parts of calcium oleate part, 0.05 part of p-octylbenzene salicylate;

[0033] Preparation:

[0034] Step a: Heat the mixer to 95°C, add inorganic filler calcium carbonate, lubricant white oil, antioxidant 168, coupling agent aminopropyltriethoxysilane, volume stabilizer calcium oleate and light stabilizer Agent salicylic acid p-octyl stupid ester, mixed and stirred for 10 minutes, added block polypropylene and thermoplastic elastomer ethylene propylene rubber to it, continued to stir for 2 minutes, prevented the material from agglomerating, and obtained the mixed material;

[0035] Step b: Add the mixture prepared in step a into the extruder, control the feeding speed to 8 rpm, the screw speed to 100 rpm, and the temperature of the extrusion proce...

Embodiment 3

[0037] Polypropylene material: 30 parts of polypropylene copolymer, 20 parts of polyolefin elastomer POE, 20 parts of calcium oxide, 1 part of chlorinated paraffin, 0.05 parts of 2,6-di-tert-butylhydroxytoluene, aminopropyltriethoxysilane 0.05 parts, 1 part of zinc stearate, 0.4 parts of p-octylbenyl salicylate;

[0038] Preparation:

[0039] Step a: Heat the mixer to 100°C, add inorganic filler calcium oxide, lubricant chlorinated paraffin, antioxidant styrenated phenol, coupling agent aminopropyltriethoxysilane, volume stabilizer hard Zinc fatty acid and light stabilizer salicylic acid p-octyl stupid ester were mixed and stirred for 30 minutes, and copolymerized polypropylene and thermoplastic elastomer polyolefin elastomer were added to it, and the stirring was continued for 5 minutes to prevent the material from agglomerating to obtain the mixed material;

[0040] Step b: Add the mixture prepared in step a into the extruder, control the feeding speed to 15 rpm, the screw ...

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PUM

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Abstract

The invention discloses a polypropylene material used for automobile bumpers and a preparation method thereof. The polypropylene material comprises polypropylene, thermoplastic elastomer, inorganic fillers, lubricants, antioxidants, coupling agents, volume stabilizer and light stabilizers. The invention has the preparation method that the inorganic fillers, the lubricants, the chemical inhibitors, the coupling agents, the volume stabilizers and the light stabilizers are added into a mixer for mixing and stirring, then the polypropylene and the thermoplastic elastomer are added into the mixture for mixing and stirring and are added into an extruder to be extruded for molding, so the polypropylene material is obtained. The invention has the advantages of high impact strength, excellent mechanical property, simple and practical preparation process and low cost, is suitable for industrial production and can be used for preparing the automobile bumpers.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a polypropylene material used for automobile bumpers, and also relates to a preparation method of the material. Background technique [0002] At present, with the rapid development of the automobile industry, people have higher and higher requirements for the cost performance of automobiles. Various environmentally friendly polymer composite materials have been widely used in automobiles. Automobile bumpers are mostly made of materials such as polyurethane elastomer and ABS, but the molding process of these materials is complicated and expensive, which increases the cost of automobiles and increases the burden on buyers. The molding process of modified polypropylene material is simple, the cost is relatively low, and it is the best material for automobile bumper. However, the modification process of the existing polypropylene material is complicated, and the impact resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/20B29C47/38B29C47/78B60R19/03B29C48/90B29C48/395B29C48/793B29C48/875
CPCB29C2947/92704B29C2947/9259B29C47/0004B29C48/875B29C2948/92704B29C48/022B29C48/793B29C48/919B29C48/90B29C48/905B29C2948/9259
Inventor 张日清董俊卿
Owner BYD CO LTD
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