Pumax Chemicals [P] Ltd manufactures Corrosion Resistant Bisphenol. Pumax Chemicals [P] Ltd also manufactures various types of Unsaturated Polyster Resins. The Corrosion Resistant Bisphenol of Grade - Px Bis, is used in Chemical Process Plants. This Resin is also used in Acid resistance Pipes and Acid Storage Vessels. The Corrosion Resistant Bisphenol is an excellent corrosion resistance to acids, mild alkalis, salts and solvents.