Scratching-resistant and stress-whitening prevention polypropylene compound and preparation method

A polypropylene composition and a stress-whitening resistance technology are applied in the preparation of scratch-resistant and stress-whitening polypropylene compositions, and in the field of scratch-resistant and stress-whitening-resistant polypropylene compositions, which can solve product stress Whitening and other problems, to achieve the effect of low equipment requirements, excellent resistance to stress whitening, and high product yield

Active Publication Date: 2012-03-21
WUHAN JINFA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a scratch-resistant and stress-whitening-resistant polypropylene composition and its preparation method, so as to solve the problem of stress-whitening products that are prone to occur in polypropylene compositions

Method used

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  • Scratching-resistant and stress-whitening prevention polypropylene compound and preparation method
  • Scratching-resistant and stress-whitening prevention polypropylene compound and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh the components according to the weight percentage shown in Table 1: polypropylene, elastomer ethylene-propylene copolymer, dimethyl polysiloxane, compatibilizer polyolefin silicone copolymer, antioxidant 1010 and light stabilizer. Mix polypropylene, elastomer, anti-scratch agent dimethyl polysiloxane, and compatibilizer in a high-speed mixer for 3 minutes, then add antioxidant and light stabilizer, and mix for another 2 minutes at a speed of 2000 rpm Minutes to obtain the premix; the premix is ​​melted and extruded by a twin-screw extruder, and the temperature of each zone of the screw is maintained at 190~230°C. Vacuum granulation produces scratch-resistant and stress-whitening-resistant polypropylene, and its resistance to Scratch and anti-stress whitening properties, the specific values ​​are listed in Table 1.

Embodiment 2

[0035] Weigh the components shown in Table 1 by weight percentage: polypropylene, elastomer ethylene-butylene copolymer, polyethylene, talcum powder, vinyl polysiloxane, compatibilizer polyolefin silicone copolymer, antioxidant agents and light stabilizers. Mix polypropylene, elastomer, polyethylene, anti-scratch agent, and compatibilizer in a high-speed mixer for 2 minutes, then add talcum powder, antioxidant and light stabilizer, and mix for another 2 minutes at a speed of 1500 rpm , to obtain a premix; the premix is ​​melted and extruded by a twin-screw extruder, and the temperature of each zone of the screw is 200° C., and vacuum granulated to obtain a scratch-resistant and stress-resistant whitening polypropylene. And measure its scratch resistance and stress whitening resistance, the specific values ​​are listed in Table 1.

Embodiment 3

[0037] Take the components shown in Table 1 by weight percentage: polypropylene, elastomer ethylene-octene copolymer, polyethylene, talcum powder, aminopolysiloxane, compatibilizer polyolefin silicone copolymer, antioxidant and light stabilizers. The preparation method is the same as in Example 2, and the performance test values ​​are listed in Table 1.

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Abstract

The invention discloses a scratching-resistant and stress-whitening prevention polypropylene compound, which comprises, by weight, 40% to 95% of polypropylene, 2% to 20% of elastomers, 0% to 15% of polyethylene, 0% to 30% of talcum powder, 1% to 5% of scratching-resistant agent, 0.5% to 8% of compatilizer, 0.1 % to 1% of oxidation inhibitor and 0.1% to 0.5% of light stabilizer, wherein the compatilizer is polyolefin organosilicon copolymer or alkyl modified polysiloxane. The preparation method of the scratching-resistant and stress-whitening prevention polypropylene compound includes steps offirstly, taking all components by weighing according to the percentage, mixing the polypropylene, the elastomers, the polyethylene, the scratching-resistant agent and the compatilizer in a high-mixing machine for one to three minutes, then adding the talcum powder, the oxidation inhibitor and the light stabilizer to be mixed together for one to three minutes, and obtaining pre-mixed materials; and secondly, melting and extruding the pre-mixed materials by a double-screw extruder, and pelleting in a vacuum state so as to obtain the scratching-resistant and stress-whitening prevention polypropylene, wherein the temperature of each area of screws ranges from 190 DEG C to 230 DEG C. The scratching-resistant and stress-whitening prevention polypropylene compound has the advantages that scratching resistance is improved by the aid of polysiloxane scratching-resistant agent, the problem of serious stress whitening of workpieces during injection molding, mounting and using due to introductionof the scratching-resistant agent is solved, and pass rate of products is high.

Description

technical field [0001] The invention relates to a polypropylene composition, especially a scratch-resistant and stress-whitening-resistant polypropylene composition; the invention also provides a preparation of a scratch-resistant and stress-whitening-resistant polypropylene composition method. Background technique [0002] Polypropylene has been widely used in automobiles recently due to its advantages of low cost, light weight, high strength, good chemical resistance, good processing technology, and easy recycling. But its disadvantage is that the surface hardness of polypropylene is low, and its parts such as instrument panels, sub-dashboards, door panels, pillars, glove boxes, etc. will inevitably be rubbed by hard objects during production, transportation and use. , such as passenger fingernail scratches, shoes bruises, thus changing the color of the interior parts, affecting the durability and aesthetics of the interior parts. In addition, stress whitening may occur ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L53/00C08L23/06C08L23/08C08L23/16C08L83/04C08L23/00C08K13/02C08K3/34B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 杨波李永华丁超黄达罗忠富姚程陈锐李晟张春怀
Owner WUHAN JINFA TECH CO LTD
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