Polypropylene composite material for automobile interior decoration, and preparation method thereof

Abstract

The invention discloses a polypropylene composite material for automobile interior decoration, and a preparation method thereof. The polypropylene composite material comprises 33.5-47 parts of homopolymerized PP, 20-33.5 parts of copolymerized PP, 15-30 parts of talcum powder, 0.2-0.5 part of an antioxidant, 1-1.5 parts of a deodorant, 0.1-0.3 part of a dispersant, 0.5-1 part of calcium stearate,0.1-0.2 part of a light stabilizer and 0.3-0.5 part of a nucleating agent. The invention also provides the preparation method of the composite material. The composite material is obtained by mixing, co-extruding, cooling, pelletizing and drying. The compounding of the homopolymerized PP and the copolymerized PP under the synergistic effects of the talcum powder, a nucleating agent and the dispersant improves the modulus of the composite material, improves the scratch resistance, avoids the use of a scratch-resistant agent, reduces the production cost, reduces the odor and the VOC content of the composite material, and makes the composite material meet the requirements of the automotive interior decoration for the use environment.

Description

technical field [0001] The invention belongs to the technical field of polypropylene modified materials, in particular to a polypropylene composite material for automobile interior decoration and a preparation method thereof. Background technique [0002] With the development and progress of human society, people's awareness of living standards is gradually improving, and the word "environmental protection" gradually catches the eyes of the public; and on the rapidly developing urban roads, the environmental protection of automobiles is also particularly important. The choice of materials has also worked towards low odor, low VOC and scratch resistance. Polypropylene (PP) plastic has excellent comprehensive physical properties, good impact resistance, resistance to various organic solvents and acid and alkali corrosion, and is cheap, so it has become the main material for making automotive interiors. [0003] However, the existing PP plastic smell has a strong pungent smell...

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Problems solved by technology

For example: Chinese patent CN102372873A discloses a low-odor, low-VOC, high-performance polypropylene composite material for automotive interiors. The raw material composition of the polypropylene composite material is 50-90% polypropylene and 0-40% inorganic filler , Toughener 5-15%, Compatibilizer 5-10%, Odor Adsorption Masterbatch 0.5-5%, Antioxidant 0.1-1.0%, Color Masterbatch 1.0-2.5%, by optimizing low-odor resin raw materials and additives , and use odor-absorbing masterbatches to achieve the effect of low odor and low VOC content, however, the scratch resistance of the polypropylene composite material is poor and cannot meet the requirements of the vulnerable automotive interior environment

Chinese patent CN104448571A discloses a low-VOC scratch-resistant polypropylene composite material for automobile interior decoration and its preparation method. The polypropylene composite material includes the following components: copolymerized PP65-80%, toughening agent 10-15%, talcum powder 5% -20%, ultrafine active nano-calcium 1-5%, odor absorber 0.5-1%, weather and aging resistance additive 0.5-1%, lubricant 0.1-0.5%, scratch-resistant agent 1-3%; VOC copolymerized polypropylene hydrocarbon is used as the base material, and ultra-low shrinkage, low VOC and scratch resistance are achieved by adding ethylene-octene copolymer, composite filler, odor absorber, scratch-resistant agent and weather-resistant and aging-resistant additives However, due to the use of scratch-resistant agents, the production cost of this polypropylene composite material is increased. At the same time, its odor level is low, and the VOC content needs to be further reduced

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