Seed oils ofEuphorbia lagascae Spreng. andVernonia anthelmintica (L.) Willd. were prepared, refined and epoxidized; trivernolin was prepared fromV. anthelmintica and also epoxidized. These products were each comparatively evaluated as plasticizer‐stabilizers for polyvinyl chloride against commercial controls. EpoxidizedEuphorbia andVernonia oils and epoxidized trivernolin have potential value as primary plasticizers with the added advantage of increased heat and light stability; they could also be used in combination with other plasticizers utilizing the latter properties. Crude and refinedEuphorbia andVernonia oils are not considered suitable primary plasticizers because of poor compatibility and permanence; at low levels they probably could be used as stabilizers.
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Krewson et al. (1966) studied this question.
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