| abstract |
PURPOSE: To provide the titled compsn. having excellent heat resistance and stable electrical, physical and chemical characteristics, consisting of PVC, an heat-resistant ester plasticizer, a basic lead cpd. and a specified epoxy cpd. n CONSTITUTION: 40W70pts.wt. of a heat-resistant ester plasticizer (B) having an MW of not less than 500 (e.g. ditridecyl phthalate), at least 5pts.wt. of a basic lead cpd. (C) having a basicity of 40% or above (e.g. lead oxide or dibasic lead phthalate) and 2W20pts.wt. of an epoxy cpd. (D) having an oxirane oxygen content of not less than 6% (e.g. an epoxidized soybean oil), are blended with 100pts.wt. of PVC (A) having an average polymn. degree of 1,200 or above. If necessary, 2W20pts.wt. of a polyfunctional monomer having at least two functional gp. is mixed with the resulting blend. Then the mixt. is subjected to a free-radical generating treatment to effect crosslinking reaction among PVC molecules. n COPYRIGHT: (C)1981,JPO&Japio |