Chemical-resistant and scratch-resistant polypropylene composite material and preparation method thereof

Abstract

The invention discloses a chemical-resistant and scratch-resistant polypropylene composite material which is prepared from the following ingredients in parts by weight: 55 to 80 parts of polypropylene, 8 to 12 parts of polyethylene and 0.5 to 2 parts of carbon black, wherein the polyethylene is at least one of extrusion-grade high-density polyethylene and injection-molding-grade high-density polyethylene, the density of the polyethylene is 0.948 to 0.965g / cm<3>, and the melt mass flow rate of the polyethylene is 0.1 to 12g / 10min. In the polypropylene composite material disclosed by the invention, all the ingredients and contents interact with each other; meanwhile, the polyethylene and the carbon black are reasonably chosen, so that the polypropylene composite material has good comprehensive performance of chemical resistance and scratch resistance, keeps very good mechanical property at the same time and is especially suitable for being applied to automotive upholsteries. Meanwhile, the invention further discloses a preparation method of the chemical-resistant and scratch-resistant polypropylene composite material.

Description

technical field [0001] The invention relates to a polypropylene composite material and a preparation method thereof, in particular to a chemical-resistant and scratch-resistant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP for short) is generally a polymer formed by free radical polymerization of propylene monomers. Compared with other general-purpose thermoplastics, it has the characteristics of low price, small specific gravity, and excellent mechanical properties, and has been widely used in the automotive field. The application scenarios of automotive polypropylene materials mainly include automotive interior parts, exterior parts and functional areas around the engine. These application areas are more or less exposed to some common chemicals, such as automotive interior parts Sweat, sunscreen, polishing wax, etc., which are easy to come into contact with in the environment, these chemicals are a sever...

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Problems solved by technology

However, the production of this material requires multiple extrusion granulation and mixing, the steps are complicated and not conducive to large-scale production, and this material is mainly used for cables

Chinese patent CN105255088B uses polypropylene resin, acrylic acid, styrene, and dicumyl peroxide to prepare acrylic styrene grafted polypropylene, and then passes through a high-speed mixer and internal mixer with carboxylated nitrile rubber, amino-terminated liquid nitrile rubber, etc. , Parallel twin-screw extruder granulator to prepare heat-resistant, oil-resistant, acid- and alkali-resistant modified polypropylene, but this kind of polypropylene composition has many processing steps and the process cannot be continuous, the production efficiency is low, and it is not suitable for large-scale rapid production

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