Studies on Chlorinated Fatty Acid Esters as Plasticizers for PVC. II.

Methyl pentachloro stearate was stabilized by epoxidized soybean oil and butyl ester of epoxidized soybean fatty acid, and properties of PVC compounds containing them were examined. Stability of methyl pentachloro stearate was improved by the addition of epoxidized soybean oil and butyl ester of epoxidized soybean fatty acid, but mechanical strength and electrical resistivity of the PVC compounds became inferior. Permanency of plasticized sheets in hot air and oil was improved by the addition of epoxidized soybean oil, but it became inferior by the addition of butyl ester of epoxidized soybean fatty acid. Low temperature flexibility and efficiency of the plasticizer was improved markedly by the addition of butyl ester of epoxidized soybean fatty acid. The stabilized methyl pentachloro stearate appears to be of broad utility applicable to a wide range of vinyl processing techniques.