High-rigidity high-transparency polypropylene composite material

Abstract

The invention discloses a high-rigidity high-transparency polypropylene composite material, and belongs to the technical field of high polymer alloy materials. The high-rigidity high-transparency polypropylene composite material is compounded by 2-4wt% of nanoscale barium sulfate master batch, 0.1-0.3wt% p-tertiary butyl hydroxyl aluminum benzoate and 0.1-0.3wt% sorbitol acetal as a nucleating agent of polypropylene. According to the high-rigidity high-transparency polypropylene composite material, the nanoscale barium sulfate master batch is added to achieve a certain compatible effect on two nucleating agents, so that the two nucleating agents are prevented from resisting against each other; and meanwhile, the effects of nucleating heterogeneously, promoting the polypropylene to quicken crystallization and refining spherocrystal effects are achieved, so that the rigidity and the transparency of a PP (polypropylene) product are further improved.

Description

【Technical Field】 [0001] The invention relates to a polypropylene composite material, in particular to a high rigidity, high permeability and lateness polypropylene composite material, belonging to the technical field of polymer alloy materials. 【Background technique】 [0002] Polypropylene (PP for short) is one of the thermoplastic plastics with the largest output. It has the advantages of low density, good heat resistance, excellent bending fatigue resistance, excellent chemical stability and electrical properties, so it is widely used Automobiles, home appliances, office supplies, electronic appliances and other fields. Polypropylene is a highly crystalline polymer, so its transparency is far inferior to non-crystalline plastics such as PS and PC. In addition, polypropylene has a lower strength among plastics, and the parts are easily deformed, which greatly limits its further use in the market. Therefore, polypropylene must be modified to meet market demand. The most effec...

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Problems solved by technology

[0003] At present, the nucleating agents on the market mainly include sorbitol, phosphate, carboxylate, etc., but there are some disadvantages, such as phosphate and carboxylate nucleating agents, although they can improve the rigidity of polypropylene , but it will lead to a decrease in impact resistance and warpage, and it cannot effectively improve the transparency of the product

The sorbitol-based nucleating agent DBS can reduce the haze of polypropylene and greatly increase the transparency of the product, but its improvement in rigidity is not outstanding

Therefore, it is very difficult to use a single nucleating agent to increase the transparency of polypropylene while improving the rigidity of the product

However, due to the different nucleation mechanisms, some nucleating agents will fight against each other when mixed together, and cannot exert their respective effects. Therefore, the modified polypropylene on the market cannot improve rigidity and transparency at the same time, so as to meet the dual needs of the market for transparency and rigidity.

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