Poster
Abstract
Research summary supplied by the authors
Bisphenol A and its substitutes, such as bisphenol S, are widely used to produce polycarbonate, epoxy resin and other chemical materials. In leather industry, bisphenol S and bisphenol F can be easily found in aryl synthetic tannins derived from phenols. ECHA and the Member States have assessed a group of 148 bisphenols (BPs) and recommended that more than 30 BPs need to be restricted due to their potential hormonal or reprotoxic effects. In this paper, the current situation of BPs content especially the bisphenol F and bisphenol S in aryl synthetic tannin s and in the leather was studied by using HPLC and the formation mechanism of bisphenol F and bisphenol S had also been discussed. At the same time, suitable hydrophilic aromatic sulfonic acids and hydrophobic aromatic monomers were chosen to condense with formaldehyde under optimized conditions to form a series of aryl synthetic t annins without the 148 BP s announced by ECHA. The new synthetic tanning agents have good performances in leather application and the resultant leathers have good physical properties.