Transparent polypropylene with high fluidity and high heat resistance and preparation method thereof

Abstract

The invention provides transparent polypropylene with high fluidity and high heat resistance and a preparation method thereof. The transparent polypropylene comprises the following components in percentage by weight: 30-70% of random copolymerization polypropylene, 23-70% of homopolymerization polypropylene, 0-5% of ethylene-octylene copolymer, 0.1-2% of a nucleating agent, 0.1-2% of an additive and 0.1-2% of a processing agent. The transparent polypropylene compound material with high fluidity, high rigidity and high heat resistance, disclosed by the invention, utilizes the advantages of high rigidity and high heat resistance of homopolymerization polypropylene, and the heat resistant temperature and the rigidity of random copolymerization polypropylene are improved; through different fluid polypropylene compounding, a wide fluidity range is achieved, so that the transparent polypropylene can meet different customer requirements; a transparent toughening agent can be added, so that the purpose of improving the low-temperature toughness is achieved; through the compounding of homopolymerization polypropylene and random polypropylene, and the adding of the nucleating agent, the particle diameter of spherocrystal is shortened, the transparency is improved, the compatibility is good, no current ripple exists on the surface, and the lustrousness is high.

Description

technical field [0001] The invention belongs to the field of modified plastics, and in particular relates to a high-flow, high-heat-resistant transparent polypropylene and a preparation method thereof. Background technique [0002] Compared with PMMA, PC, transparent ABS and other thermoplastic transparent plastic materials, transparent polypropylene has obvious cost advantages, and complies with food and drug hygiene regulations, and has been widely used in household appliances, tableware, medical equipment, daily necessities and other fields. However, limited by the synthesis process and the molecular chain structure of the material, there is still a certain gap in transparency, mechanical properties, and heat resistance, especially in the field of small household appliances such as electric irons, kitchen appliances, and electric fans. In terms of heat resistance, the use requirements are relatively high, and ordinary transparent polypropylene materials are difficult to m...

AI Technical Summary

Problems solved by technology

However, limited by the synthesis process and the molecular chain structure of the material, there is still a certain gap in transparency, mechanical properties, and heat resistance, especially in the field of small household appliances such as electric irons, kitchen appliances, and electric fans. In terms of heat resistance, the use requirements are high, and ordinary transparent polypropylene materials are difficult to meet the requirements, thus limiting the promotion and use of transparent polypropylene materials

[0003] Chinese patent CN201080053441 discloses a heterogeneous polypropylene product that synthesizes a balance between rigidity and transparency. It mainly polymerizes monomers with different structures in the ring pipe process, and directly polymerizes to produce random copolymerized polypropylene products. It is limited by the synthesis process. The rigidity and heat resistance of the product are still insufficient

Chinese patent CN201410130806 discloses a high heat-resistant and cold-resistant transparent polypropylene material, which is mainly used for blow molding bottles. Its melt flow rate is below 2g / 10min, and the product transparency is slightly better than ordinary PP, but the transparency is still It cannot meet the requirements of some home appliances; Chinese patent CN2008102074767 discloses a toughening method for high-flow transparent polypropylene, which is mainly aimed at the toughening and modification of transparent PP products, but does not propose a solution to the problems of heat resistance and rigidity

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