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Modified polypropylene material for thin-wall bumper and preparation method thereof

A technology for polypropylene materials and bumpers, which is applied in the field of modified polypropylene materials and its preparation, can solve problems such as insufficient consideration of rigidity, and achieve the effects of low linear thermal expansion and contraction rate, high rigidity, and high toughness

Active Publication Date: 2010-09-22
NANJING JULONG SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent of application publication number CN101693777A has announced the material for automobile bumper and its preparation method, adopts saturated ethylene-octene as toughening agent, calcium sulfate whisker is used as the method for reinforcing agent to prepare bumper material, but equally rigid give enough consideration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The polypropylene is a copolymerized polypropylene, wherein the comonomer of the copolymerized polypropylene includes ethylene, the content of ethylene is 4-5mol%, the melt flow rate of the polypropylene is 90-100g / 10min, and the dosage is 75 parts by weight; the toughening agent It is PE (the relative molecular weight is about 150,000), and the dosage is 8 parts by weight; the inorganic mineral is calcium carbonate of 0.5-1.5 μm, and the dosage is 10 parts by weight; the mineral fiber is glass fiber, and the dosage is 5 parts by weight; the compatibilizer is Graft rate is 1%, and melt flow rate is the polymer of polypropylene and maleic anhydride grafting of 100g / 10min, and consumption is 1 weight part; Processing aid is ethylene bis stearamide, and consumption is 1 weight part ;

[0032] The preparation method of the present invention is as follows:

[0033] (1) Raw materials are mixed evenly: take polypropylene, compatibilizer, toughening agent, inorganic minerals a...

Embodiment 2

[0037] The polypropylene is a copolymerized polypropylene, wherein the comonomer of the copolymerized polypropylene includes ethylene, the content of ethylene is 4-5mol%, the melt flow rate of the polypropylene is 90-100g / 10min, and the dosage is 75 parts by weight; the toughening agent It is an ethylene-octene copolymer (relative molecular mass is about 1.2 million), and the dosage is 8 parts by weight; the inorganic mineral is 0.5-1.0 μm talcum powder, and the dosage is 10 parts by weight; the mineral fiber is silica whisker, and the dosage is 10 parts by weight. 5 parts by weight; the compatibilizer is the grafted polymer of polypropylene and maleic anhydride with a graft rate of 1% and a melt flow rate of 100g / 10min, and the consumption is 1 part by weight; the processing aid is ethylene bishard Fatty amide, consumption is 1 weight part; Preparation method is with embodiment 1.

Embodiment 3

[0039] The polypropylene is a copolymerized polypropylene, wherein the comonomer of the copolymerized polypropylene includes ethylene, the content of ethylene is 9-10mol%, the melt flow rate of the polypropylene is 100-110g / 10min, and the dosage is 65 parts by weight; the toughening agent It is a mixture of PE (relative molecular weight is about 150,000) and ethylene-octene copolymer (relative molecular weight is about 1.2 million) in a weight ratio of 1:1, and the dosage is 12 parts by weight; the inorganic mineral is 0.5-1.5 μm talc Powder, consumption is 12 weight parts; Mineral fiber is the mixture of aluminum borate whisker and silicon oxide whisker (weight ratio 1: 1), and consumption is 8 weight parts; Compatilizer is that grafting rate is 1%, melt flow The polymer grafted with polypropylene and maleic anhydride at a rate of 90g / 10min, the dosage is 2 parts by weight; the processing aid is silane coupling agent WD-60, the dosage is 1 part by weight; the preparation metho...

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Abstract

The invention discloses a modified polypropylene material applicable for a thin-wall bumper and a preparation method thereof. The material comprises the following components in parts by weight: 50 to 90 parts of polypropylene, 5 to 20 parts of toughening agent, 10 to 15 parts of inorganic mineral, 5 to 15 parts of mineral fiber, 1 to 5 parts of compatibilizer and 1 to 5 parts of processing aid. The product of the invention has the characteristics of high fluidity, high toughness and high rigidity, simultaneously has the characteristics of high surface activity, low shrinkage, low linear thermal expansion and shrinkage rate, heat resistance and low temperature resistance and efficiently satisfies the requirement of a vehicle bumper material.

Description

technical field [0001] The invention relates to a modified polypropylene material suitable for thin-walled bumpers and a preparation method thereof, in particular to a kind of high flow, high toughness, high rigidity, high surface activity, low shrinkage, Low linear thermal expansion and contraction rate, heat and low temperature resistant modified polypropylene material. Background technique [0002] Polypropylene has the advantages of low density, easy molding and processing, and good resistance to gasoline and chemicals. It is widely used in interior and exterior parts of automobiles, housings of electronics and household appliances, etc. It is currently the fastest growing general-purpose thermoplastic. However, polypropylene also has the obvious disadvantages of poor heat and low temperature resistance and large molding shrinkage, so it needs to be modified when used in automobile bumpers. [0003] Automobile bumper is a thin-walled large-scale structural part with lar...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L23/14C08L23/06C08L51/06C08L23/08C08K3/26C08K3/34C08K7/14C08K7/10C08K7/08C08K5/20C08K3/04B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 张新亚周勇蒋顶军吴汾
Owner NANJING JULONG SCI&TECH CO LTD
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