Hebei Messi Biology Co., Ltd. stated that magnesium oxide and magnesium carbonate are important additives in rubber products. The amount of magnesium oxide and magnesium carbonate used in many foreign brand tires is much higher than the domestic average level, generally about 3-7 parts. After the increase of magnesium oxide and magnesium carbonate by 30%-70%, the performance of rubber tires in terms of heat generation and aging has not changed significantly, but the degree of reduction in wear loss is significantly better than that of ordinary tires, and the tire density after the increase of magnesium oxide and magnesium carbonate has a significant decrease, which not only effectively reduces the cost and quality of the rubber, but also greatly improves the performance of the rubber.
Hebei Messi Biology Co., Ltd. stated that not all magnesium oxide and magnesium carbonate can take on this important task and be used in rubber products, because the quality of magnesium oxide and magnesium carbonate has an important influence on the performance of rubber.
Magnesium oxide is generally divided into light magnesium oxide and heavy magnesium oxide according to its bulk density, and can be divided into high-activity magnesium oxide, medium-activity magnesium oxide, low-activity and relatively inert magnesium oxide according to its chemical activity. Generally speaking, only light and active magnesium oxide can be used as a CPE vulcanization aid. When selecting magnesium oxide, you should not only pay attention to its content and mistakenly think that the higher the content, the better. Instead, you should comprehensively consider the quality of magnesium oxide from aspects such as bulk density, activity (iodine absorption value or citric acid value), content, particle size, surface modification, etc., and then select it through experimental comparison.
Hebei Messi Biology Co., Ltd. has proved through experiments that the comprehensive quality of magnesium oxide\magnesium carbonate has a significant relationship with the rubber vulcanization speed, vulcanization degree, and physical properties such as tensile strength and elongation at break of the rubber. Generally speaking, light and moderately active magnesium oxide is used by most formulas. At the same time, the finer the particle size of magnesium oxide\magnesium carbonate, the better its acid absorption speed, and the more conducive it is to improve tensile strength and promote vulcanization. If the surface is coated and modified with an appropriate coupling agent, the dispersibility of magnesium oxide and its compatibility with rubber can be increased, and it is more suitable for addition in rubber mixing.