3.3'.4.4'-Benzophenonetetracarboxylic Dianhydride
3.3'.4.4'-Benzophenonetetracarboxylic Dianhydride 25g : 3.3'.4.4'-Benzophenonetetracarboxylic Dianhydride is a key polyimide precursor for high-temperature polymers. Its benzophenonetetracarboxylic dianhydride structure ensures thermal stability and chemical resistance.