Bulk polymerization antibacterial ABS resin and preparation method thereof

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a polymer-grade antibacterial ABS (Acrylonitrile Butadiene Styrene) resin and a preparation method thereof. The formula comprises the following raw materials in percentage by weight: 5-20% of toughened rubber, 50-65% of styrene, 10-25% of acrylonitrile, 10-20% of a solvent, 0.5-5% of an antibacterial agent monomer, 0.01-0.1% of an initiator, 0.1-0.3% of a chain transfer agent and 0.02-0.25% of an antioxidant. According to the present invention, the antibacterial effective component of the polymer grade antibacterial ABS resin is connected with the polymer monomer in the chemical bond manner, such that the antibacterial substance and the ABS matrix resin are truly integrated, and the problems of poor compatibility and influence on the mechanical property and the thermal property do not exist;

Description

technical field [0001] The invention belongs to the technical field of macromolecular materials, in particular to a polymerization-grade antibacterial ABS resin and a preparation method thereof. Background technique [0002] ABS resin is a blend of rubber-toughened styrene-acrylonitrile copolymer (SAN), which has excellent strength, toughness and processability, and is widely used in automobiles, home appliances, machinery, shipbuilding and other fields. ABS resin has excellent mechanical properties and processing properties, but it does not have antibacterial properties, which greatly limits its use in household appliances, household products, food packaging, medical equipment, health care products, etc., which have high requirements for hygiene and environmental bacteria concentration. For this reason, people have developed antibacterial ABS resin, which itself has a good inhibitory or killing effect on bacteria, fungi, molds and even viruses contaminated on the surface of...

AI Technical Summary

Problems solved by technology

[0007] 1. Natural antibacterial agents are mainly extracted from plants, such as chitin, chitosan, castor oil, horseradish, etc., which are generally non-toxic and harmless and easy to use, but the disadvantages are low antibacterial rate, poor heat resistance, and cannot be broad-spectrum and long-lasting And the quantity is very small, and due to the low antibacterial rate, the amount of addition is relatively large to achieve a better antibacterial effect, which will affect the mechanical and thermal properties of ABS resin while increasing the cost;

[0008] 2. Organic antibacterial agents mainly include organic compounds such as quaternary ammonium salts, imidazoles, thiazoles, and phenols. They have a high antibacterial rate and do not affect the color and mechanical properties of ABS resin itself. They are widely used in European and American countries, but their The disadvantages are poor heat resistance, easy hydrolysis, short validity period, and some organic antibacterial agents themselves have low toxicity and cannot be used in the field of direct contact with the human body;

[0009] 3. Inorganic antibacterial agents are also known as metal ion antibacterial agents. They use the antibacterial properties of metal ions such as silver, zinc, and copper to fix them on carriers such as zirconium phosphate, plexiglass, zeolite, and molecular sieves by means of ion exchange adsorption. It is made of antibacterial agent, which has the advantages of high antibacterial rate, good heat resistance, and less addition. The disadvantage is that metal ions such as silver ions will precipitate and penetrate into the human body, which will cause argyria. Long-term use will affect people's life and health. Secondly, silver ions are easy to be reduced. It is a black silver element, and the copper ion itself shows blue color, which affects the chromaticity of ABS products. Except for silver ions, other metal ion antibacterial agents have insufficient antibacterial performance per unit mass, and a large amount needs to be added to achieve a better antibacterial effect. The addition amount not only increases the cost but also loses the original mechanical and thermal properties of ABS resin. Titanium dioxide photocatalytic antibacterial agents must have sufficient light intensity to have antibacterial properties, and cannot be used in some occasions without light or weak light. narrow face

Except for the antibacterial principle of titanium dioxide photocatalysis, the metal ion antibacterial agent is based on the principle of metal ion dissolution and sterilization. With the dissolution of metal ions, the antibacterial performance of antibacterial ABS will decrease, so the antibacterial ABS resin containing metal ion antibacterial agent has antibacterial durability. Can not guarantee

[0010] ABS materials are widely used in automobiles, home appliances, children's toys, medical and health care and other fields, but ABS polymer itself does not have antibacterial properties, and bacteria and other microorganisms are easy to breed on the surface of plastic products. When people come into contact with ABS products with bacteria, they are prone to infection. , ABS materials without antibacterial properties are easy to become the medium for the spread of bacteria and other microorganisms, posing a threat to people's lives and health