High-impact transparent permanent antistatic polypropylene composite material and preparation method thereof

Abstract

The invention discloses a high-impact transparent permanent antistatic polypropylene composite material and a preparation method thereof. The high-impact transparent permanent antistatic polypropylenecomposite material comprises the following raw materials: polypropylene, functionalized ethylene propylene rubber, a transparent agent, an antioxidant and a nucleating agent. The polypropylene composite material prepared by melting, mixing and granulating the raw materials has the advantages of high impact resistance, excellent transparency, permanent static resistance and the like, can be applied to the fields of light diffusion LED illumination, food packaging, daily article packaging and the like, and is particularly applicable as a raw material for the packaging industry of direct injection molding and the like.

Description

Technical field [0001] The present invention relates to a polypropylene composite, and in particular, a high-resistance transparent permanent anti-electrostatic polypropylene composite material is related to the preparation method thereof, which is a polypropylene modified technology. Background technique [0002] Polypropylene is used as a general plastic, which has the advantages of low price and good heat resistance. It is widely used in automotive, home appliances, office supplies and various electronic electrical fields, especially lighting and take-out packaging industries, transparent high-resistance and The demand for polypropylene materials that have both permanent anti-electrostatic properties has increasing, but since polypropylene is a semi-crystalline material, it mainly includes homogeneous polypropylene, no polypropylene, and block copolypropylene, the prior It has better transparency, but poor toughness, block copolymerization polypropylene can have good impact to...

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Problems solved by technology

[0002] As a general-purpose plastic, polypropylene has the advantages of low price and good heat resistance. It is widely used in automobiles, home appliances, office supplies and various electronic appliances, especially in lighting and takeaway packaging industries. The demand for polypropylene materials with permanent antistatic properties is also increasing, but since polypropylene is a semi-crystalline material, it mainly includes homopolypropylene, random polypropylene and block copolymer polypropylene, the former two It has good transparency, but poor toughness. Block copolymerized polypropylene can have good impact toughness, but due to the heterogeneous structure, the refractive index difference between the continuous phase and the dispersed phase leads to poor transparency of the material, and the general Transparent polyolefin does not have a permanent antistatic effect, and some conductive polymers or carbon black need to be added, which in turn reduces the transparency of the material. Therefore, research on the preparation of high-impact transparent permanent antistatic polypropylene composite materials has become a modified One of the important directions of polypropylene

[0003] At present, there are many studies on high-impact transparent polypropylene. There are two main ways. One is the modification method. On the matrix of random polypropylene or homopolypropylene, by adding a small amount of toughening agent and phase Compatibilizer, but due to the incompatibility of multi-phase, the refractive index gap of the interface is large, it is difficult to balance high impact resistance and transparency

Another method is to adjust the process and increase the ethylene intake on the basis of the polymerization kettle and the random polypropylene polymerization, and improve the impact performance to a certain extent on the basis of maintaining a certain transparency as much as possible. , but the improvement range is limited, and it is not flexible enough to meet the differentiated needs of downstream customers

[0004] Chinese patent CN104312013A provides a high-flow high-impact transparent polypropylene material produced by the hydrogen adjustment method, which solves the defects of unstable fluidity, strong odor, and easy yellowing of products produced by the degradation method of the same industry, but the product is still non-toxic. Standard copolymer polypropylene category, Charpy notched impact strength 6.0-6.5KJ / m 2 , the impact strength is still difficult to meet some applications with high toughness requirements, while the flexibility of the polymerization method is relatively low, it is difficult to meet the differentiated needs of downstream customers

[0005] Chinese patent CN201811503639.6 provides a light-colored permanent antistatic modified polypropylene material and its preparation method. By adding a conductive nano-carbon material composite antistatic agent to the polypropylene matrix, it has light color, excellent mechanical properties and A permanent antistatic material that does not depend on ambient humidity, but nano-carbon materials will still greatly affect the transparency of the material, so it is not suitable for high-transparency products

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