Polypropylene compound for automobile fender and preparation method thereof

A polypropylene and fender technology, applied in the field of polymer materials and their molding processing, can solve the problems of increased material cost and high price, and achieve the effect of excellent aging resistance and high performance

Inactive Publication Date: 2014-09-24
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rubber fenders are characterized by softness and high impact, but are expensive; plastic materials are currently mainly prepared by blending polypropylene with talcum powder and thermoplastic elastomers, but to achieve low modulus and high impact, a large amount of thermoplastic must be added. Elastomer, virtually greatly increases the cost of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 82.5 kg of polypropylene PP SP179, 5 kg of toughening agent POE DF610, 1 kg of LLDPE grafted with maleic anhydride graft Bondyram4108, 0.2 kg of phenolic antioxidant 1010, 0.3 kg of phosphite antioxidant 168, 0.5 kg Processing aid EBS, 0.5 kg of light stabilizer 770 are melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1, and 10 kg of 3000-mesh talc powder is fed into the twin-screw extruder from the side through a weight-loss weighing scale Machine, the temperature of each section of the extruder is set at 180-240 ° C, extruded and granulated, and finally the product is obtained.

[0030] Test its performance according to the corresponding standards, the list is as follows:

[0031] performance

Embodiment 2

[0033] Process 60 kg of polypropylene PP K9017, 15 kg of toughening agent SEBS6154, 2 kg of HDPE grafted with maleic anhydride graft Bondyram5101, 0.5 kg of phenolic antioxidant 1010, 0.5 kg of phosphite antioxidant 627A, and 1 kg Auxiliary zinc stearate and 1 kg of light stabilizer 944 are melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1, and 20 kg of 3000-mesh talcum powder is fed into the twin-screw from the side through a weight-loss weighing scale. Extruder, the temperature of each section of the extruder is set at 180-240°C, extruded and granulated, and finally the product is obtained.

[0034] Test its performance according to the corresponding standards, the list is as follows:

[0035] performance

Embodiment 3

[0037] 30 kg of polypropylene PP K9928, 30 kg of toughening agent LLDPE7144, 5 kg of ethylene-octene copolymer maleic anhydride graft 493D, 1 kg of phenolic antioxidant 1010, 1 kg of phosphite antioxidant 627A, 1.5 kg of processing aid calcium stearate and 1.5 kg of light stabilizer 622 are melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1, and 30 kg of 5000-mesh talcum powder is fed from the side through a weight-loss weighing scale Put into a twin-screw extruder, set the temperature of each section of the extruder at 180-240°C, extrude and granulate, and finally obtain the product.

[0038] Test its performance according to the corresponding standards, the list is as follows:

[0039] performance

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Abstract

The invention discloses a polypropylene compound for automobile fenders and a preparation method thereof. The polypropylene compound for automobile fenders comprises 89-19 wt% of polypropylene, 5-40 wt% of a flexibilizer, 1-5 wt% of polar monomer grafted olefin polymer, 0-2 wt% of a heat stabilizer, 0-2 wt% of a processing auxiliary agent, 0-2 wt% of a light stabilizer, and 5-30 wt% of talcum powder. The preparation method comprises the following steps: melting, mixing and dispersing polypropylene, the flexibilizer, polar monomer grafted olefin polymer, the heat stabilizer, the processing auxiliary agent, and the light stabilizer in a double screw extruder, feeding the talcum powder from a side feeding port into the double screw extruder, setting the temperature of each section of the extruder at 180-240 DEG C, and performing extrusion granulation. The material provided by the invention has the characteristics of low modulus, high impact, and excellent aging resistance, meets the requirements of low modulus, high impact, and aging resistance for automobile fenders, and realizes high performance of automobile fender materials.

Description

technical field [0001] The invention relates to a polypropylene compound for automobile fenders and a preparation method thereof, and belongs to the field of polymer materials and their molding and processing. Background technique [0002] With the development of automobile lightweight technology, plastic strip steel has become the development trend of the automobile industry, and polypropylene material plays an important role in automobile lightweight technology due to its excellent performance-price ratio and low density. [0003] The main function of the car fender is to prevent the mud from splashing on the body or pedestrians when the car is driving on the muddy road, which will cause the body or the body to be unsightly. Therefore, in addition to the requirements of excellent weather resistance and aging resistance, the fender also requires the characteristics of low modulus and high impact. It is easy to deform and not easy to be damaged when subjected to external imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L51/06C08K13/02C08K3/34B29B9/06B29C47/92B29C48/92
CPCB29C47/0011B29C47/92B29C47/6087B29B9/06B29C48/92B29C2948/92704C08K2201/003C08L23/0815C08L23/12C08L2201/08C08L2205/03C08L51/06C08K13/02C08K3/34C08L53/02B29C48/04B29C48/40B29C48/625
Inventor 刘志雄孙刚张永杨明刘远邵华
Owner SHANGHAI KINGFA SCI & TECH
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