Background and preparation of pyrolene_Kain Industrial Additives

background and overview[1] methylene isc10 a highly valuable component among heavy aromatics, it is mainly used to produce pyromellitic dianhydride (pmda). the main use of pyromellitic dianhydride is to react with 4,4-diaminodiether to produce new high-temperature resistant engineering plastics and insulating materials polyimide (pi). polyimide is widely used in aerospace, atomic energy, electromechanical and other…