Antibacterial ABS plastic and preparation method thereof

Abstract

Disclosed antibacterial ABS plastic is prepared from the following raw materials in parts by weight: 90-120 parts of ABS resin, 3-5 parts of polyurethane quaternary ammonium salt, 3-5 parts of a plasticizer and 3-5 parts of an auxiliary agent. The preparation method comprises the following steps: preparing hyperbranched quaternary ammonium salt; and conducting melt blending of the raw materials, and conducting extrusion granulation to obtain the antibacterial ABS plastic. A dendritic quaternary ammonium salt polymer antibacterial agent is obtained by reacting the micromolecular antibacterial agent quaternary ammonium salt with a hyperbranched polymer to introduce dendritic molecules into the molecular structure of the quaternary ammonium salt. The quaternary ammonium salt has good hydrodynamic behavior, and can be well dispersed in ABS resin, and due to high functionality, molecular chains of the quaternary ammonium salt can be chemically bonded with ABS resin, so that the defect of low thermal stability of micromolecular quaternary ammonium salt serving as an antibacterial agent is overcome, the antibacterial property and antibacterial stability of the ABS resin are enhanced, andthe safety to a human body is achieved.

Description

technical field [0001] The invention belongs to the technical field of ABS plastics, and specifically designs an antibacterial ABS plastic and a preparation method thereof. Background technique [0002] ABS resin is a terpolymer of acrylonitrile (A), butadiene (B) and styrene (S), and the relative content of the three monomers can be changed arbitrarily to make it resin. ABS resin has the common properties of the three components. Acrylonitrile (A) makes it chemically resistant, heat-resistant, and has a certain surface hardness. Butadiene (B) makes it highly elastic and tough. Styrene (S ) to make it have the processing and molding characteristics and electrical properties of thermoplastics. Therefore, ABS resin has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties, and also has the characteristics of easy processing, stable product size, and good surface gloss. At present, ABS resin has been widely us...

AI Technical Summary

Problems solved by technology

Common antibacterial agents for plastics mainly include inorganic, organic small molecules, natural and human molecules, and polymers. Among them, inorganic antibacterial agents are characterized by good heat resistance, wide antibacterial spectrum, and are not easy to produce drug resistance. However, there are easy discoloration, difficult manufacturing, complicated process, and heavy metal ions involved in the production process are easy to pollute the environment; the characteristics of organic small molecules are fast sterilization, convenient processing, and good color stability, but they have poor heat resistance and are easy to produce. It is precipitated in a solvent environment and fails, and it is easy to produce drug resistance. The decomposition products are often toxic and endanger human health. The characteristics of polymer antibacterial agents are long-acting, broad antibacterial spectrum, small irritation, diverse structures, and rich types, which can effectively overcome the shortcomings of the above three antibacterial agents

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