Thermal-oxidizing-aging resisting polypropylene composite

Abstract

The invention discloses a thermal-oxidizing-aging resisting polypropylene composite. The thermal-oxidizing-aging resisting polypropylene composite comprises the following components in percentage by weight: 30%-85% of polypropylene, 0-10% of flexibilizer, 2%-10% of compatilizer, 10%-40% of filling agent, 0.1%-0.5% of nucleating agent, 1%-10% of load type functional agent and 0.2%-1.0% of processing agent. Due to the nucleating agent, the polypropylene spherocrystal is refined, the crystallization is uniform and regular and the degree of crystallinity is increased, so that the lattice defect of a substrate is avoided effectively, and the oxygen is prevented from dispersing to the inner part from the surface of the composite freely; due to the compatilizer, the interface bonding force of the polypropylene and the filling agent is improved, so that two phase interfaces are combined tightly, the and the oxygen is prevented from dispersing to the inner part from the surface of the composite freely, and the thermal-oxidizing-aging resistance is improved; and the load type functional agent solves the problem of dispersibility and solvent resistance of an antioxidant and a light stabilizer. The thermal-oxidizing-aging resisting polypropylene composite has a simple preparation method, is high in thermal-oxidizing-aging resisting efficiency and is widely applied to the field of household appliances such as electric cookers, microwave ovens, washing machines, dish-washing machines and the like.

Description

technical field [0001] The invention relates to the technical field of polypropylene modification, in particular to a heat-resistant oxygen aging polypropylene compound. Background technique [0002] Polypropylene has the advantages of abundant sources and low price, and compared with other general-purpose plastics, it has the characteristics of good mechanical properties, low density, good rigidity, high strength and good electrical insulation performance. It is currently widely used in the field of household appliances, but due to Polypropylene contains unstable tertiary carbon groups, and Yiai is attacked by heat, oxygen and ultraviolet rays, and its performance deteriorates, such as yellowing, surface cracking and pulverization, and a significant decline in mechanical properties. Therefore, many products are Long-term heat-oxidative aging resistance requirements are put forward for polypropylene. The existing improvement methods are generally to improve the heat and oxy...

AI Technical Summary

Problems solved by technology

[0004] There is a common problem in the above-mentioned patents, that is, the antioxidant or light stabilizer is directly dispersed in the material system. Although the short-term aging performance is very good, under the long-term action of heat, oxygen and light, the antioxidant or light stabilizer There will be a problem of precipitation, especially when the product is in contact with the hot water solution of detergent or washing powder for a long time, these antioxidants or light stabilizers are easily dissolved by the hot washing liquid, resulting in a significant increase in the aging resistance of the above-mentioned polypropylene products. decline