A special low-volatility, migration-resistant nano-composite anti-aging masterbatch for polypropylene and its preparation process

Abstract

The invention discloses a special low-volatility migration-resistant nano composite anti-aging master batch for polypropylene. The master batch comprises the following components in parts by weight: 35 to 45 parts of carrier resin polypropylene, 35 to 45 parts of light stabilizer a, 0 to 10 parts of light stabilizer b, 20 to 30 parts of ultraviolet light absorber, 1 to 2 parts of nano zinc oxide, 0.5 to 2 parts of dispersed lubricant and 0.5 to 5 parts of surface treating agent. In the master batch disclosed by the invention, a broadband as well as efficient and long-acting ultraviolet screening capacity of the nano zinc oxide are used to take a synergistic effect with the organic light stabilizer, so that weather resistance of a target product is greatly improved; a universal formula is adopted, and by an ultrahigh adsorption effect brought by a high specific surface area of the nano zinc oxide, content of volatile matter in the master batch and a subsequent plastic product is effectively reduced, the low VOC (Volatile Organic Compound) requirement on the product is met, and the master batch accords with the national standard.

Description

technical field [0001] The invention relates to the technical field of polymer material modification formula and processing, in particular to a low-volatility, migration-resistant nano-composite anti-aging masterbatch for polypropylene and a preparation process. Background technique [0002] Polypropylene material is widely used in structural parts such as automobiles and home appliances because of its good rigidity and excellent mechanical properties, heat resistance, chemical corrosion resistance, easy molding processing, good surface gloss, and recyclable utilization. . However, polypropylene (PP) is particularly poor in weather resistance. Because of the tertiary carbon structure on the main chain of polypropylene, polypropylene is very easy to age and degrade due to the combined effects of heat, oxygen, light, and water vapor in the environment during processing, storage, and use, losing luster, physical and chemical properties, and use. value. [0003] Since the ant...

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Problems solved by technology

This method will lead to an increase in the use of masterbatch and increase the cost of customer formulations

And high-concentration anti-aging masterbatches need to add a large amount of dispersant to solve the migration problem caused by uneven dispersion, and there is no effective method to suppress the remaining volatile organic compounds in masterbatches

[0005] Inorganic nano-ZnO has a very small particle size, and the nanoparticles have a very high specific surface area and insufficient atomic coordination, so that the nanoparticles have a strong adsorption effect, which can effectively adsorb the low molecular weight in the masterbatch and polypropylene formulation system. Volatile matter, followed by nano-scale zinc oxide particles have a strong shielding effect on UVA and UVB bands of ultraviolet rays. At present, only composite inorganic nanoparticles have been used in polycarbonate sun panels in China, but in polycarbonate There is no specific use method and effect in the field of propylene

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