Properties:
Durene, also known as 1,2,4,5-tetramethylbenzene, is an organic compound with a chemical formula of C6H2(CH3)4. It is a colorless solid with a sweet odor. It is one of the three isomers of tetramethylbenzene, the other two being 1,2,3,4-tetramethylbenzene (melting point −6.2°C) and 1,2,3,5-tetramethylbenzene (melting point −23.7°C). The melting point of durene is relatively high (79.2°C), which reflects the high symmetry of its molecule.
Uses:
Durene is a component with high utilization value among C10 heavy aromatics, and is mainly used in the production of pyromellitic anhydride (PMDA). The main uses of pyromellitic anhydride are to react with 4,4-diaminodiphenylether to produce new high-temperature resistant engineering plastics and insulating materials polyimide (PI). Polyimide is widely used in aerospace, atomic energy, electromechanical and other industrial productions with excellent electrical insulation properties, high temperature resistance and radiation resistance. In addition, PMDA is also an important raw material for high-quality plasticizers, curing agents and matting agents for powder coatings. The demand for PMDA is increasing, and the demand for durene has also increased exponentially.