| 摘要 |
The stabilization of polyvinyl chloride resins and polyvinyl chloride resin compositions with novel compositions comprising metal salts of carboxylic acids and an alpha -acyl-lactone of the formula: <IMAGE> wherein R represents an aliphatic or aromatic radical containing 2 to 30 carbon atoms, R' represents a linear or branched-chain hydrocarbon radical having from 2 to 30 carbon atoms or a divalent cyclic radical having 4 to 10 carbon atoms. |
