<I>EASTMAN</I> PTA (Purified Terephthalic Acid) 1,4-benzenedecarboxylic acid 100-21-0 Eastman Chemical Company Corrosion inhibitor Polyester Coatings >> Powder Coatings Automotive OEM Coil Coating General Industrial /Maintenance Metal Eastman PTA (Purified Terephthalic Acid) is used to manufacture polyester coatings resins for use in the formulation of general metal, appliance, automotive, industrial maintenance, and coil coatings. The primary application for PTA is in combination with Eastman NPG Glycol in polyester powder coating resins. It has also been used in unsaturated polyesters for fiberglass-reinforced plastics applications. The aromatic ring of PTA imparts excellent hardness and corrosion and stain resistance to coatings resins and unsaturated polyesters. PTA has moderate solubility in molten glycols which can increase synthesis times, and it imparts moderate solubility to resins. It shows excellent weathering ,good chemical and stain resistance ,good hardness/flexibility balance ,ideal glass transition temperature range ,Outstanding powder flow and fluidization characteristics. It is used in polyester polyols for polyurethanes ,polyester powder coating resins ,polyester-melamine baking enamels ,unsaturated polyester resins for fiberglass-reinforced plastics ,waterborne polyester resins. Purified terephthalic acid. Used in general metal, appliance, automotive, industrial maintenance and coil coatings. Imparts very good hardness, corrosion and stain resistance. Possesses good weathering, chemical and stain resistance. Offers good hardness/flexibility balance. Exhibits ideal glass transition temperature.