Analysis of Reaction Products (e.g. Chlorohydrins) of ESBO in Poly(vinyl chloride) Type Polymers and Coatings

摘要

The transformation products of epoxidized soybean oil (ESBO) reacted with hydrochloric acid from heated PVC were analyzed by GC-FID after gentle transes-terification and acetylation. Treatment of ESBO with HCl at ambient temperature results in almost quantitative conversion to chlorohydrins, but elevated temperatures, such as used to produce PVC articles or to cure can coatings, also cause further reactions, the products of which have not been identified. In PVC cling films and PVC gaskets of lids for glass jars, probably less than 10% of the ESBO is converted, but in organosol type can coatings it might frequently be more than 20%. It is expected that with a single can or glass jar (baby food), up to a few milligrams of ESBO transformation products are ingested. When the use of ESBO was authorized, the toxicity of these reaction products has not been evaluated.