The heat stabilities and transparencies of stearates of rare earth metals except scandium and promethium used as heat stabilizers as PVC were studied.

• 研究了钪、钷外其他稀土金属硬脂酸皂对PVC热稳定作用。结果表明:它们均属长期型热稳定剂,与少量硬脂酸锌并用可有效改善其抑制PVC初期着色的效能;