Stress whitening resistant and scratch resistant polypropylene composition, and preparation method thereof

A polypropylene composition and polypropylene resin technology, applied in the field of polypropylene composition and its preparation, can solve problems such as difficult balance, and achieve the effect of excellent toughness

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still no good method for how to solve the contradiction between toughening and improving scratch resistance and stress whitening performance, and it is difficult to balance the above-mentioned properties in the existing technology

Method used

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  • Stress whitening resistant and scratch resistant polypropylene composition, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0021] Polypropylene (Sinopec Beijing Yanshan Petrochemical Company, brand: K9726, melt index: 26g / 10min), talc (Dalian Fuji Mining Co., Ltd., 2500 mesh), ethylene propylene rubber (Dow Chemical Company, brand: NORDEL IP ), oil-extended fully vulcanized powder styrene butadiene rubber A (the weight ratio of fully vulcanized powder styrene butadiene rubber to linear polymethicone lubricant (Beijing Second Chemical Industry Plant) is 100:35, of which the fully vulcanized powder styrene butadiene rubber Beijing Research Institute of Chemical Industry, brand: VP101, average particle size 0.1μm), polyethylene (Sinopec Beijing Yanshan Petrochemical Company, brand: 3300J, melt index: 2.5g / 10min), antioxidant (Swiss Ciba Chemical Company, brand: B225) After mixing uniformly (see Table 1 for specific formula), use twin screw to extrude and granulate at 190~230℃. The samples were injected by the injection machine, and the mechanical properties, scratch resistance and other properties wer...

Embodiment 4～5

[0023] Except that the oil-extended fully vulcanized powder styrene butadiene rubber A is changed to oil-extended fully vulcanized powder styrene butadiene rubber B (the weight ratio of fully vulcanized powder styrene butadiene rubber to linear polymethylsiloxane lubricant is 100:90). The remaining components and preparation conditions are the same as in Example 1, and the specific formula and test results are shown in Table 1.

[0024] The examples of the present invention use a scratch resistance tester to evaluate the degree of scratch resistance. A mechanically driven scraper is used to scrape a line segment pattern on the prepared plastic surface. Then use a colorimeter to measure the color deviation of the unscratched surface. In the same sample area, use a spectrophotometer to measure the light scattering value of the sample before and after scratching. The difference in light scattering before and after scratching ΔE is used to measure the scratch resistance of polypropy...

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Abstract

The present invention provides a stress whitening resistant and scratch resistant polypropylene composition, and a preparation method thereof. The polypropylene composition comprises the following components, wherein the components are blended, and comprise, by weight, 100 parts of a polypropylene resin, 0-50 parts of a mineral filler, 0.05-40 parts of oil-filled fully-vulcanized powdered rubber,0.01-30 parts of polyethylene and 0-30 parts of a toughening agent. The oil-filled fully-vulcanized powdered rubber is the fully-vulcanized powdered rubber filled with a polysiloxane lubricant and/orhydrocarbon lubricating oil, and the average particle size of the full-vulcanized powdered rubber is 20-2000 nm. The polypropylene composition of the present invention has characteristics of good mechanical property, scratch resistance and stress whitening resistance.

Description

Technical field [0001] The invention relates to a polypropylene composition and a preparation method thereof. Specifically, it relates to a polypropylene with good impact performance, resistance to stress whitening and scratch resistance and a preparation method thereof. technical background [0002] Polypropylene has the advantages of low price, light weight, easy recycling, good processing and formability, etc., and has a wide range of applications in many fields. However, polypropylene also has the problem of poor impact resistance. When it is suitable for occasions that have certain requirements for the balance of rigidity and toughness, it cannot meet the requirements of actual use, especially in the fields of automobiles and home appliances. At present, the most commonly used method to improve the impact resistance of polypropylene is by blending rubber or elastomers, such as ethylene propylene rubber and polyolefin elastomers. However, this method also has certain limita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/06C08L23/08C08L51/06C08L9/06C08L13/00C08L9/02C08L9/00C08L83/04C08L33/04C08L23/16C08K3/34C08K3/26C08K5/01
Inventor 金滟元文芳丁树岩蔡涛刘善元石胜鹏张静
Owner CHINA PETROLEUM & CHEM CORP
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