The influence of bisphenol antioxidants on thermo-oxidative degradation of plasticised poly(vinyl chloride)

A number of phenolic antioxidants have been evaluated, alone and in combination with phosphites, for their ability to reduce HCl evolution from PVC formulations plasticised with a new class of plasticiser based on formals of dioxane alcohols. The results show that the effectiveness of phenols is more or less independent of the chemical structure but determined by their evaporation rates. The best formulations decrease the chloride ion concentration in the working zone air during PVC linoleum production by approximately three times. (C) 2001 Elsevier Science Ltd. All rights reserved.