Polypropylene composition for improving surface flame treatment effect and preparation method of polypropylene composition

Abstract

The invention discloses a polypropylene composition for improving a surface flame treatment effect and a preparation method of the polypropylene composition. The composition is prepared from, by weight, 40-70 parts of polypropylene resin, 10-20 parts of POE, 5-15 parts of a styrenic block copolymer, 10-30 parts of filler, 3-5 parts of maleic anhydride grafted polypropylene, 0.5-2.0 parts of pigments and 0.2-2.0 parts of auxiliary agents. By introduction of the styrenic block copolymer with a main chain containing unsaturated double bonds into a conventional polypropylene and filler system, thesurface double bond content is increased, and polymer surface polarity is improved; since the double bonds can be easily oxidized by high-temperature flame, more oxygen-containing functional groups can be introduced, surface tension and wettability are improved, the surface flame treatment effect can be evidently improved by the prepared polypropylene composition, and the polypropylene composition can be used for preparation of automobile full-plastic tail door outer plates and spoilers and has great surface flame treatment and adhesion performances.

Description

technical field [0001] The invention relates to a polypropylene composition and a preparation method thereof, in particular to a polypropylene composition for improving the surface flame treatment effect and a preparation method thereof, and belongs to the technical field of modified polymer materials. Background technique [0002] Polypropylene PP is a semi-crystalline plastic with the characteristics of low density and easy processing, and has become the most widely used variety of automotive plastics. The all-plastic tailgate is one of the current trends in the development of lightweight vehicles. The all-plastic tailgate mainly includes an inner panel, an outer panel and a spoiler, among which the outer panel and the spoiler are made of PP+Talc material, and different parts are connected by adhesive. However, polypropylene is a non-polar resin with low surface energy, poor adhesive performance, low adhesive strength and prone to interfacial degumming. [0003] In order...

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Problems solved by technology

However, due to the large variety of PP, which has a relatively broad molecular weight distribution and crystallinity, the surface flame treatment effect is often poor, resulting in adhesive failure.

At present, in the existing technology, the surface energy of the material system is enhanced by adding an elastomer with a certain polarity to the PP+Talc material system for compounding, thereby enhancing its surface polarity, although this method can increase to a certain extent Adhesion and bonding properties of polypropylene materials, but most of them are only suitable for improving the adhesion of surface coatings, the improvement of surface energy is not very obvious, and it is not suitable for the bonding between PP+Talc; there are few published The polypropylene composition used to bond the PP material and the polyurethane foam layer has very limited improvement on the surface energy of the PP+Talc material system, and it is difficult to achieve a better effect

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