Abstract
Metal cans are often protected from corrosion by vinylic organosol coatings, made from PVC and epoxyphenolic (EP) resins. Using electron spin resonance, BADGE, a monomer of EP, was shown to plasticize PVC. Optimization of extraction allowed extraction of 4 mg of BADGE/dm2, so vinylic organosols appear to be worst-case coatings. Comparison of behavior between BADGE and a paramagnetic probe revealed that these compounds were trapped to a large extent in the cross-linked EP network and could not migrate at 40 °C. Contact with triglycerides, which plasticize the coating, induced high migration of BADGE. Neither isooctane nor ethanol could mimic fats, in contrast to isooctane/tert-butyl acetate mixtures. In aqueous foodstuffs, BADGE hydrolyzed into a monoepoxide and then into a bisdiol. The total amount of toxicologically relevant epoxides over shelf life was shown to reach a maximum value within 3 weeks at 40 °C, at very low levels, whatever the aqueous food simulant. After sterilization at 120 °C (20 min), t...
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