On the Epoxidation of Maleinized Fatty Esters

In the previous paper, we reported that the maleinized fatty esters are the useful primary plasticizers for polyvinyl chloride. On this paper, we attempted to improve the properties of these plasticizers by epoxidation. The epoxidation of maleinized oleic esters was rather difficult than that of oleic ester by the steric effect of maleic ester. Thus, we could not get the epoxide having high content of oxirane oxygen. However, the PVC film plasticized by the epoxides obtained (oxirane oxygen content 0.20.4%) showed better properties than the film plasticized by the raw maleinized fatty esters in color, clearness and thermal stability.