Polypropylene modified composite material automobile bumper

An automobile bumper and composite material technology, applied in the field of polypropylene modified composite automobile bumpers, can solve the problems of small elongation at break, insufficient impact strength, poor fluidity, etc., and achieve hardness and melt flow rate. Improve, reduce shrinkage, good fluidity

Inactive Publication Date: 2015-08-05
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the materials used for bumpers have problems such as poor shrinkage control, low paint adhesion, poor weather resistance, poor toughness, unsatisfactory impact resistance, small elongation at break and low thermal deformation temperature.
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, complicat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example one

[0015] The bumper material comprises the following components in parts by weight: 45 parts polypropylene, 8 parts bis(p-hydroxyphenyl)phenyl phosphine oxide, 10 parts metallocene polyolefin elastomer, 7 parts nylon, 2-10 parts Maleic anhydride, 8 parts of thermoplastic polyurethane, 1-6 parts of acrylonitrile-butadiene-styrene, 6 parts of ethylene propylene rubber, 6 parts of polyethylene, 7 parts of shear thickener, 14 parts of polyisophthalamide M-phenylenediamine fiber, 3 parts antistatic agent, 3 parts antioxidant, 6 parts dispersant, 3 parts plasticizer, 3 parts ultraviolet absorber.

[0016] In this embodiment, the antistatic agent is a mixture of ethoxylated alkyl amine and ethoxylated alkyl acid amine.

[0017] In this embodiment, the antioxidant is a mixture of dilauryl thiodipropionate and β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate. In the examples, the dilauryl thiodipropionate was replaced with dilauryl thiodipropionate, lauryl thi...

Example Embodiment

[0023] Example two

[0024] According to the polypropylene modified composite material automobile bumper of the present invention, the bumper material comprises the following components in parts by weight: 35-55 parts of polypropylene, 2-10 parts of bis(p-hydroxyphenyl)phenyl phosphine oxide, 5-15 parts of metallocene polyolefin elastomer, 2-10 parts of nylon, 2-10 parts of maleic anhydride, 4-12 parts of thermoplastic polyurethane, 1-6 parts of acrylonitrile-butadiene-styrene, 3-11 parts Ethylene propylene rubber, 3-11 parts of polyethylene, 4-10 parts of shear thickening fluid, 10-16 parts of polymetaphenylene isophthalamide fiber, 1-6 parts of antistatic agent, 1-4 parts of antistatic agent Oxygen, 4-10 parts of dispersant, 1-5 parts of plasticizer, 1-5 parts of UV absorber.

[0025] In this embodiment, the antistatic agent is an ethoxylated alkyl acid amine.

[0026] In this embodiment, the antioxidant is a mixture of dilauryl thiodipropionate and β-(3,5-di-tert-butyl-4-hydroxy...

Example Embodiment

[0032] Example three

[0033] According to the polypropylene modified composite material automobile bumper of the present invention, the bumper material comprises the following components in parts by weight: 35-55 parts of polypropylene, 2-10 parts of bis(p-hydroxyphenyl)phenyl phosphine oxide, 5-15 parts of metallocene polyolefin elastomer, 2-10 parts of nylon, 2-10 parts of maleic anhydride, 4-12 parts of thermoplastic polyurethane, 1-6 parts of acrylonitrile-butadiene-styrene, 3-11 parts Ethylene propylene rubber, 3-11 parts of polyethylene, 4-10 parts of shear thickening fluid, 10-16 parts of polymetaphenylene isophthalamide fiber, 1-6 parts of antistatic agent, 1-4 parts of antistatic agent Oxygen, 4-10 parts of dispersant, 1-5 parts of plasticizer, 1-5 parts of UV absorber.

[0034] In this embodiment, the antistatic agent is a mixture of ethoxylauramide and glycerol monostearate (GMS)

[0035] In this embodiment, the antioxidant is a mixture of lauryl thiodipropionate and β-...

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PUM

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Abstract

The invention discloses a polypropylene modified composite material automobile bumper which is made of materials including polypropylene, bis (p-hydroxyphenyl) phenyl phosphine oxide, metallocene polyolefin elastomer, nylon, maleic anhydride, thermoplastic polyurethane, acrylonitrile-butadiene-styrene, ethylene propylene rubber, polyethylene, shear thickening fluids, poly (m-phenylene isophthalamide) fibers, antistatic agents, antioxidants, dispersing agents, plasticizers and ultraviolet absorbents. The materials of the bumper are fine in flowability and easy to process and avoid deform and post-shrinkage even if the materials are used in a high-temperature high-humidity environment, shrinkage is effectively reduced, and other mechanical performance indexes of polypropylene automobile materials can be met. Compared with existing bumper materials, bending modulus, tensile strength, hardness and melt flow rate are greatly increased.

Description

technical field [0001] The invention relates to the field of auto parts materials, in particular to a polypropylene modified composite auto bumper. Background technique [0002] PP is a semi-crystalline material. It is harder and has a higher melting point than PE. Because the homopolymer PP temperature is very brittle below 0C, many commercial PP materials are random copolymers with 1 to 4% ethylene or clamp copolymers with higher ethylene content. Copolymer PP materials have a low heat distortion temperature (100C), low transparency, low gloss, and low rigidity, but have stronger impact strength. The strength of PP increases with the increase of ethylene content. The Vicat softening temperature of PP is 150°C. Due to the high degree of crystallinity, this material has very good surface stiffness and scratch resistance properties. PP does not have environmental stress cracking problems. Usually, PP is modified by adding glass fibers, metal additives or thermoplastic r...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/00C08L77/00C08L75/04C08L55/02C08L23/16C08L23/06C08L77/10C08K5/5397C07F9/53
CPCC08L23/12C07F9/5325C08K2201/017C08L2205/035C08L2205/16C08L2207/04C08L23/00C08L77/00C08L75/04C08L55/02C08L23/16C08L23/06C08L77/10C08K5/5397
Inventor 邓涛韩海硕
Owner CHONGQING JIAOTONG UNIVERSITY
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