Hebei Messi Biology Co., Ltd. stated that magnesium oxide is a white loose powder. Relative density is 3.20~3.23. It is insoluble in water and ethanol, but soluble in acid. It can gradually absorb moisture and carbon dioxide in the air and reduce its activity, so it should be strictly sealed.
In addition to being a chloroprene rubber vulcanization accelerator, magnesium oxide can also be used as an activator and inorganic accelerator for chloroprene rubber. It is suitable for almost all types of chloroprene rubber compounds, but the rubber compounds have poor water resistance. It can improve the scorch performance of the compound and help the storage of the mixed rubber. When zinc oxide is used in chloroprene rubber, magnesium oxide must be added, and its dosage can be as high as 5 parts according to the hardness requirements. If the dosage is lower than that of zinc oxide, there is a risk of scorch. It can improve the tensile strength, tensile stress and hardness of chloroprene rubber vulcanizate. It can also neutralize the small amount of hydrogen chloride produced during vulcanization and when the product is exposed to sunlight or harsh oxidizing conditions, and has similar properties to other halogenated rubbers. It can give chlorosulfonated polyethylene vulcanizate good physical and mechanical properties, especially low permanent deformation, but poor water resistance.
Adding magnesium oxide to fluororubber can be used as a hydrogen fluoride acceptor to achieve high vulcanization. In addition, it can also improve the scorch performance of fluororubber and improve the thermal stability of vulcanized rubber, but the acid resistance is poor. When it is used as an environmentally friendly accelerator for hard rubber, it has a low relative density and is cheap, suitable for steam vulcanization. It can also be used as a vulcanization activator and inorganic accelerator for natural rubber and styrene-butadiene rubber. As an activator in styrene-butadiene rubber, it can greatly reduce the early vulcanization tendency of the rubber. In addition, it can also be used as a reinforcing agent for heat-resistant nitrile rubber. When magnesium oxide is used in tire buffer layer rubber, it can improve multiple deformation performance and the bonding force between cord layers. Nano-magnesium oxide is an excellent filler and reinforcing agent for rubber products, which can improve the quality and strength of rubber products. Nano-magnesium oxide has the characteristics of light weight and good activity, and can be used as an accelerator and activator for chlororubber and fluororubber.