Active magnesium oxide plays the role of acid absorption in fluororubber production, for the purpose of speeding up the sulfide. The second, magnesium oxide can increase the bonding performance with metal skeleton, heat-resistant quality and so on. Inhale iodine value is the key to judge the performance of magnesium oxide in acid absorption. Under normal circumstances, the larger Inhale iodine value, the stronger ability of acid absorption. For example, when used as acid acceptor, you only add three copies of high active magnesium oxide is OK, but if you add lower active magnesium oxide, you need add five copies, even more.
Magnesium oxide and zinc oxide are common used as acid acceptor. When adding zinc oxide, usually used same amount of dibasic lead phosphite in water resistance rubber. While magnesium oxide is used in high heat resistance rubber. Lead oxide is often used in acidproof rubber. Calcium oxide, or together with magnesium oxide is used as low compression and deformation rubber. Calcium hydroxide and active magnesium oxide are the main acid-acceptor.
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