This application is a continuation-in-part of Ser. No. 74024, filed Sept. 10, 1979 (abandoned) which is a continuation-in-part of Ser. No. 821,012 filed August, 1977, now U.S. Pat. No. 4,167,504 which issued Sept. 11, 1979.
Polyvinyl chloride resin compositions are provided, suitable for use as electrical insulation material, having a high volume resistivity and a high resistance to deterioration when heated at temperatures above 100.degree. C., comprising as the essential ingredients a polyvinyl chloride resin and, in the amounts indicated, in parts per one hundred of resin, from about 30 to about 100 parts mono or poly carboxylic acid ester plasticizer; from about 5 to about 25 parts filler; from about 1 to about 20 parts epoxy compound, and from about 1 to about 20 parts lead alkyl phenolate.
