摘要 |
1443613 Stabilization of polyvinyl chloride SOC CHIMIQUE DES CHARBONNAGES 15 July 1974 [3 Aug 1973] 31201/74 Heading C3P Polyvinyl chloride is stabilized by a compound of formula wherein each R is a hydracarbon radical, for example an alkyl, alicyclic or phenyl radical specified alkyl radicals being methyl, ethyl, butyl and octyl. |