Transparent polypropylene resin with strong impact resistant performance

Abstract

The invention belongs to the field of polymer materials, and specifically relates to a transparent polypropylene resin with a strong impact resistant performance. The transparent polypropylene resin comprises random impact resistant polypropylene resin, which is obtained through polymerization between propylene monomers and ethylene monomers; wherein the weight content of ethylene monomers is 4.0 to 8.0%, 1 to 3% of propylene monomers participates the random copolymerization to form polypropylene random copolymer, and 3 to 5% of propylene monomers participates the impact resistant copolymerization to form impact resistant polypropylene copolymer. The provided transparent polypropylene resin has the advantages of transparency, impact resistance, good comprehensive performance, low application cost, high rigidity, low processing viscosity, and easiness in moulding.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a high-impact transparent polypropylene resin. Background technique [0002] Polypropylene resin has good heat resistance, processability and mechanical strength. It also has the characteristics of low density, easy recovery and recyclability. It is widely used in automobiles, electrical appliances, daily necessities, household and packaging and other fields. Transparent polypropylene is widely used in food packaging, medical products, media product packaging, finishing boxes, beverage bottles, and baby bottles because of its transparent and beautiful products, good hygiene, heat resistance, and low price. It is precisely because of the many advantages of transparent polypropylene that it has developed rapidly around the world since it came out in the early 1980s. The consumption of transparent polypropylene in my country is also growing rapidly. As of 2012, the cons...

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Problems solved by technology

[0003] Traditional transparent polypropylene is usually obtained by adding a transparent agent to homopolymerized or random copolymerized polypropylene. At present, the more prominent problem in use is that its impact performance, especially at low temperature, is low and cannot meet Requirements

However, due to the introduction of the rubber phase into the polypropylene matrix, the impact resistance of polypropylene is greatly improved at room temperature, but its transparency is poor, and the haze is generally around 60%, which cannot meet the needs of transparency in many fields.

[0004] In the case where both transparency and high impact resistance are required, the method of blending random polypropylene with POP, POE, SEBS and other elastomers is mainly used at present. This method can improve the impact resistance of the material to a certain extent. However, it also brings many adverse effects, such as: the price of the added elastomer is high, and it needs to go through twin-screw granulation, which will greatly increase the production cost. At the same time, the elastomer modified product will increase the haze and rigidity. Decrease and increase in processing viscosity greatly affect the transparency and rigidity of the product, increase the difficulty of processing, and prolong the processing cycle. The introduction of elastomers also reduces the hygienic properties of materials, and their applications in medical, food packaging and other fields are limited.

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