At first, magnesium oxide plays a part of stabilization while mixing. It can prevent size material from scorching. What’s more, the magnesium oxide can improve scorching during storage and plastify the rubbers.
At the beginning of mixing, adding magnesium oxide can prevent chloroprene rubber adhesive from early cross bonding and circularzation, and increase safety performance. It also can be the vulcanizing agent and plays an role of the hydrogen chloride acceptor when it vulcanizes. What’s more, it can prevent from hydrogen chloride’s erosion to carton fibration. The quality of magnesium oxide has a significant impact to the chloroprene rubber adhesive’s processing vulcanization. Increasing the dosage of magnesium oxide to ten units, the vulcanized rubber has a high performance in plastic and a better storage stability. In addition, it can decrease the curing speed.
The zinc oxide is mainly used in vulcanized rubber and makes vulcanization flat. Increasing the dosage of zinc oxide can improve performance of heat resistance and ageing-resistance, but the size material is easily to scorch and was decreased storage stability. Using it in a large doses will make size material harden and lose plasticity. However, a large doses of it can increase curing speed, enhance curing speed and the resistance to high temperature. Generally speaking, using magnesium oxide and zinc oxide simultaneously can solve some problems of fast cure rate and easily burnt.