A  polyester  molecule  is made up of many ester  linkages  and  vinyl groups (carbon-to-carbon double bonds). Chemical attack of a polyester occurs  at the most reactive sites - the ester linkages and the  unreacted  vinyl  groups.  Ester linkages are  susceptible  to  hydrolytic attack by strong acids like hydrochloric acid and strong alkalis  like caustic soda. Unreacted vinyl groups in the polymer can be attacked by oxidation and halogenation.
       
Bisphenol  resins are formulated to have bare minimum  ester  linkages in its molecular chain. These ester linkages are structurally protected  from  an  environmental attack. Cured  Bisphenols  have  excellent         hydrolytic stability and excellent chemical resistanc to a wide  range of  corrosive chemicals even at elevated temperatures. The  hydrolytic stability of Bisphenols increases resistance to alkalies and makes  it         most  suited  for alkaline exposure. These  resins  display  excellent physical, mechanical and high temperature chemical resistance  properties.
       
Bisphenols  are mainly used for chemical corrosion resistant  applications  especially  suited for alkaline exposure, in most  mineral  and organic chemicals, in salt solutions and for chemical fumes etc.
                       
        #  BISPHENOLS  for        *  higher chemical resistance properties