Research on a New Type of PVC Light Stabilizer — Preparation and Properties of a Calcium/Zinc Epoxy Oleate Composite Light Stabilizer

Research on a New Type of PVC Light Stabilizer — Preparation and Properties of a Calcium/Zinc Epoxy Oleate Composite Light Stabilizer

In this paper, a new PVC light stabilizer based on calcium epoxy oleate and zinc epoxy oleate as main raw materials was prepared. The optimal formula of this calcium-zinc composite light stabilizer is: calcium epoxy oleate : zinc epoxy oleate : β-diketone : epoxidized soybean oil : hindered phenol 1010 = 9:3:3:4:4. Using the thermal-ageing oven method, Congo red method and conductivity method, this light stabilizer was compared with domestic and imported calcium-zinc light stabilizers. The results show that the thermal stability of this composite light stabilizer is higher than that of both domestic and imported calcium-zinc light stabilizers, and its thermal stability time at 180°C reaches 320 min.