Low-VOC low-odor polypropylene resin composition and preparation method thereof

Abstract

The invention belongs to the field of plastics, and relates to a low-VOC low-odor polypropylene resin composition and a preparation method thereof. The preparation method comprises: (1) dissolving octaisobutylsilsesquioxane in n-hexane to obtain the n-hexane solution of octaisobutylsilsesquioxane; (2) mixing the n-hexane solution of the octaisobutylsilsesquioxane and polypropylene powder, and drying the mixed material to achieve a constant weight; (3) uniformly mixing an acid-absorbing agent, an antioxidant and the dried material obtained in the step (2) to obtain a premix; and (4) carrying out melt blending on the premix to obtain the polypropylene resin composition. According to the present invention, the total volatile organic compound (TVOC) of the polypropylene resin composition can be significantly reduced so as to well solve the disadvantages in the prior art; the operation process is simple and reliable, and the investment cost is low; and the obtained product is suitable for high-grade vehicle interior decoration members, medical and food packaging materials, and other fields with high environmental protection requirements.

Description

technical field [0001] The invention belongs to the field of plastics, and more specifically relates to a low-VOC and low-odor polypropylene resin composition and a preparation method of the low-VOC and low-odor polypropylene resin composition. Background technique [0002] Polypropylene (PP) has been widely used in various fields of people's life because of its excellent comprehensive properties, wide range of sources, high quality and low price. However, the existing polypropylene materials and products all have the problems of releasing volatile organic compounds (VOC) and odors to pollute the environment and endanger people's health in varying degrees, which largely limits the use of polypropylene materials in high-end products with high environmental protection requirements. Applications in automotive interior parts, medical and food packaging materials, etc. Therefore, the research and development of environmentally friendly low-VOC and low-odor polypropylene resin an...

AI Technical Summary

Problems solved by technology

For example, CN101570612A reduces VOC content by adding an inorganic photocatalyst to decompose small organic molecules, but the components are complex and the effect is limited

CN101255252A reduces the VOC of material by adding organic matter repellant (such as isopropanol / water), but there are compatibility and persistence problems in this way

Although the aforementioned method of using adsorbent can play a certain role in reducing the VOC of polypropylene, there is still a problem of adsorption balance. At higher temperatures, the balance moves to the direction of desorption, resulting in the possibility of re-release of VOC in polypropylene material later. Hidden danger

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