Groundnut and castor oils were passed through an azeotropic salt bath to yield heterogeneous masses. Both the oils yield acetone‐soluble and ‐insoluble fractions. In both the cases acetone‐insoluble fractions show the presence of benzenoid rings, ether linkages and oxiranes. The average molecular weights of acetone‐soluble fractions vary from 901 to 936 in the case of groundnut oils and from 974 to 979 with castor oils. This shows that these oils are capable of polymerization by the present method. Copyright © 1967 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim