Hebei Messi Biology Co., Ltd. stated that in halogen-containing rubber, high-temperature vulcanization will cause the halogen to be removed from the rubber molecular chain, forming HF, HCl, HBr, etc. These products will not only affect the vulcanization performance and physical properties of the rubber, but also have a great impact on the performance of the product. Magnesium oxide is mainly used in the production of rubber products and chloroprene adhesives. In rubber manufacturing, magnesium oxide acts as an acid absorber and accelerator, and in chloroprene adhesives, it acts as a vulcanization cross-linking, anti-scorching agent and resin chelating agent.
Adding metal oxides to rubber can absorb these acids. Generally, zinc oxide and magnesium oxide are commonly used, but adding more zinc oxide can easily cause the rubber to burn. Therefore, magnesium oxide is a better choice. In addition, magnesium oxide also plays a role in vulcanization cross-linking, anti-scorching, and improving thermal stability in rubber. Particle size distribution and morphology of magnesium oxide. The activity of magnesium oxide refers to its ability to promote chemical reactions or physical adsorption.
Hebei Messi Biology Co., Ltd. stated that magnesium oxide and zinc oxide are generally used at the same time to solve the problem of easy burning of vulcanized rubber, as well as high degree of vulcanization and fast vulcanization speed, and the degree of crosslinking is much higher than that of single use.
Magnesium oxide can play a stabilizing role when added during mixing, prevent burning during processing, and improve the burning of rubber during storage. In plasticization, it also has the function of plasticizing rubber. Adding magnesium oxide to rubber at the beginning of mixing can prevent early crosslinking and cyclization of chloroprene rubber and increase the safety of operation. During vulcanization, it becomes a vulcanizer, plays the role of hydrogen chloride acceptor, improves the stability of rubber, and prevents hydrogen chloride from corroding fiber tissue. Magnesium oxide can increase the stability stress of rubber, improve heat resistance and aging resistance, but leads to a decrease in elongation. The quality of magnesium oxide has a great influence on the processing and vulcanization of chloroprene rubber. When the amount of magnesium oxide is increased to 10 parts, the vulcanized rubber can have higher plasticity and better storage stability, but can reduce the vulcanization speed.