Low-VOC and low-migration polypropylene composite material and preparation method thereof

Abstract

The invention discloses a low-VOC and low-migration polypropylene composite material and a preparation method thereof. The low-VOC and low-migration polypropylene composite material is prepared from 45 to 85 parts of polypropylene, 5 to 10 parts of polyethylene, 10 to 45 parts of inorganic filler, 0.05 to 0.1 part of vitamin E-type compound heat stabilizer and 0.05 to 0.1 part of titanium dioxide light stabilizer. The raw materials are mixed, extruded and granulated to be prepared into the low-VOC and low-migration polypropylene composite material. According to the low-VOC and low-migration polypropylene composite material disclosed by the invention, the green and environment-friendly aids of the vitamin E-type compound thermal stabilizer and the titanium dioxide light stabilizer are utilized to modify the polypropylene, and have small adding amount, good compatibility with a base material and no precipitation; thus, the prepared composite material has the characteristics of low VOC, low migration and the like, and can be applied to automotive trim materials of instrument boards, door boards, stand columns and the like of automobiles.

Description

technical field [0001] The invention relates to the technical field of modified materials, in particular to a low-VOC, low-migration polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (referred to as PP) has the advantages of excellent mechanical properties, low density, good heat resistance, excellent bending fatigue resistance, chemical stability and electrical properties, and is one of the most widely used general-purpose plastics. Because of its good physical and mechanical properties and processing properties, it is widely used in automotive interior parts, including main and auxiliary instrument panels, door panels and pillars. However, polypropylene modified materials will produce volatile organic substances (VOC) such as benzene, aldehydes and amines during the synthesis of raw materials, processing and aging, which are harmful to human health. Therefore, in order to reduce the VOC content in special materi...

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Problems solved by technology

[0003] Patent CN101691435B prepares a low-VOC high-performance PP composite material for automotive interior parts by selecting low-VOC hydrogen-tuned polypropylene, but it limits the application of polypropylene materials and is not conducive to the elimination of VOC generated during the preparation process

Patent CN101817953B adds an inorganic porous odor adsorbent to prepare a low-emission modified polypropylene composite material, but this method has analysis and balance problems and is not conducive to the elimination of VOC

Patent CN101255252B discloses a low-emission special material for automotive interiors, using low-molecular-weight carbonates as organic repellants, but it is difficult to be compatible with polypropylene resin, and VOC removal is poor

Patent CN102875895A discloses a low-emission polypropylene material and its preparation method and application, using low-boiling point VOC detergent and N2 stripping agent, due to the low boiling point and short mixing time, it is difficult for the detergent to reach Uniform, not conducive to the elimination of VOC

The low-VOC polypropylene composite material disclosed in patent CN 10357154A has added different kinds of various additives, and must be under a relatively large vacuum to be able to devolatilize completely, and the equipment needs to be re-invested, and there is a hidden danger of precipitation due to the addition of various additives

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