The actual effect of PVC heat stabilizer

PVC heat stabilizer has two main preparation process, one is the calcium carbide process, main raw materials for the production of PVC heat stabilizer is calcium carbide, coal and salt; two is the ethylene method, optical brightener main raw material is oil. PVC heat stabilizer and zinc borate and optical brighteners are mainlycalcium carbide method. In the calcium carbide preparation of PVC, PVC thermal stabilizer in the salt electrolysis hydrogen chloride for the production of PVC, sodiumsurplus for the production of caustic soda, so, black iron oxide, zinc borate, antimonyflame retardant actually exists symbiosis, chlor alkali balance optical brighteners andthe entire industry two processes in different economic development cycle opticalbrightener, cost difference. Under normal circumstances, iron oxide black because ofhigher oil prices, high aluminum hydroxide and optical brightening agent ethyleneproduction cost, chromium oxide and zinc borate advantages; but once the international economy into recession, chromium oxide will be running low, calcium carbide process because of high energy consumption, such as the electricity price support, cost advantage disappears. PVC heat stabilizer and optical brighteners tocarbide PVC capacity is expanding rapidly, formed a great challenge to the ethyleneproduction of PVC, optical brighteners are many ethylene enterprises at a loss of the edge. But with the 2008 May crude oil prices continued to decline, the ethylene cost advantage obviously, electrical manufacturers stone low profit operation, or evendifficult to continue.