Precipitation-resistant, scratch-resistant, high-performance and low-cost polypropylene composite material and preparation method thereof

Abstract

The invention discloses a precipitation-resistant, scratch-resistant, high-performance and low-cost polypropylene composite material and a preparation method thereof. The modified polypropylene composite material comprises the following components in percentages by weight: 40-90% of polypropylene, 5-15% of an elastomer, 0-30% of an inorganic filling material, 1-15% of fumed silica, 0.05-5% of an organic light stabilizer, 0.1-1.5% of an antioxidant, 0-2% of a coupling agent and 0-2% of auxiliary agents. According to the invention, the fumed silica has an extremely strong ultraviolet absorptionfunction, so the usage amount of the light organic stabilizer is reduced; and the fumed silica particles generate hydrogen-bond interaction through silanol groups existing on the surfaces of the fumedsilica particles to form an aggregate network, and the silanol groups and the aggregate network structure have effective adsorption and migration inhibition effects on the organic light stabilizer, so migration of the organic light stabilizer to the surface of a product is reduced. Meanwhile, the fumed silica has an excellent lubricating effect, so the friction coefficient of the surface of the product can be effectively reduced, and the usage amount of a scratch-resistant auxiliary agent can be reduced.

Description

technical field [0001] The invention relates to a high-performance and low-cost polypropylene composite material resistant to precipitation and scratching; the invention also provides a preparation method of the high-performance and low-cost polypropylene composite material resistant to precipitation and scratching. Background technique [0002] With the continuous development of the automobile industry, lightweight, safety, comfort, and aesthetics have become the focus of attention. Due to its excellent performance, low price and easy processing and molding, polypropylene is widely used in the automotive field, such as dashboards, sub-dashboards, door panels, pillars, bumpers, etc. As people's aesthetic requirements for automotive interiors are getting higher and higher, OEMs' performance requirements for materials are also constantly improving. The air quality in the car is the focus of major OEMs, so reducing the use of additives is beneficial to improve the odor and VOC...

AI Technical Summary

Problems solved by technology

Application number: CN110317407A discloses a PP composite material with low friction coefficient and its preparation method. The method improves the scratch resistance of the material by adding polytetrafluoroethylene and polysiloxane, but polytetrafluoroethylene is expensive And not easy to fuse with polypropylene matrix

CN102108152A discloses a polypropylene composition with both low emission and excellent light aging resistance. The method can partially or completely replace traditional organic light stabilizers by adding ultrafine titanium dioxide capable of effectively absorbing and shielding ultraviolet rays, thereby obtaining Polypropylene composition with low emission performance and excellent light aging resistance. Although the addition of silicon dioxide can reduce the amount of organic light stabilizer, it cannot prevent the organic light stabilizer from migrating to the surface of polypropylene

For some materials, when using a light stabilizer with a low melting point or using a large amount of light stabilizer, there will be a greater risk of precipitation and stickiness

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