Antistatic polypropylene composite material capable of being used in explosion-proof environment and preparation method thereof

Abstract

The invention discloses an antistatic polypropylene composite material capable of being used for an explosion-proof container and a preparation method of the antistatic polypropylene composite material. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 68 to 90 percent of polypropylene, 10 to 25 percent of an antistatic agent, 0.1 to 2 percent of a stabilizer and 0 to 5 percent of other additives. Through the synergistic effect of various antistatic agents, the antistatic polypropylene composite material with the surface resistivity of 10 <5>-10 <8> ohm is obtained, and the antistatic polypropylene composite material is suitable for various injection-molded or blow-molded containers or other products with explosion-proof requirements.

Description

technical field [0001] The invention relates to a polypropylene composite material, in particular to an antistatic polypropylene composite material that can be used in an explosion-proof environment, and a preparation method thereof; it belongs to the field of polymer modification and processing. Background technique [0002] As a light-weight, low-cost, and easy-to-process material, plastics are widely used in various fields such as transportation, electronics, packaging, and military affairs. As the polymer with the lowest density among the five general-purpose plastics, polypropylene is used in various industries year by year due to its processing and cost advantages. But polypropylene also has its inherent disadvantages, such as large shrinkage, low strength, etc., and like most polymer materials, the surface resistivity of ordinary polypropylene is about 10^14-10^16, which is a typical insulating material , It is easy to generate static electricity by friction when use...

AI Technical Summary

Problems solved by technology

But polypropylene also has its inherent disadvantages, such as large shrinkage, low strength, etc., and like most polymer materials, the surface resistivity of ordinary polypropylene is about 10^14-10^16, which is a typical insulating material , it is easy to generate static electricity by friction when used in the environment and it is not easy to dissipate

The static electricity on the surface of ordinary products is at most easy to absorb dust, but the accumulation of static electricity on the surface of plastic products and containers used in environments requiring high explosion-proof requirements will bring huge dangers, such as working environments rich in flammable gases, loading gunpowder, etc. Or containers for volatile solvents, etc., if polypropylene materials are used, antistatic modification must be carried out to greatly reduce the surface resistivity

[0003] There are many studies on antistatic modification of polypropylene in the industry. Antistatic agents for polypropylene include polyoxyethylene, polyols, quaternary ammonium salts, etc. Antistatic requirements in general industries are relatively low, and generally only surface resistance is required. The resistivity is 10^9-10^11, and the amount of antistatic agent added is small; but the explosion-proof environment generally requires the surface resistivity to be in the range of 10^5-10^8, too high or too low may cause explosion risk, This requires high effectiveness and accurate dosage of the antistatic agent

Conductive carbon black is a relatively common antistatic agent or conductive additive in the industry. It can achieve lower resistivity after a large amount of addition, but because its powder particle size is very small, it is very difficult to process and disperse, and it will greatly reduce the matrix resin. Impact resistance, which limits the scope of use of the product; and if the amount of addition is small, although sufficient material properties can be maintained, the surface resistivity often does not meet the requirements

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