Polyimide Resin
Polyimide Resin
(Polyimide)
Thermoset polyimides were introduced in the 1960s, followed in the early 1970s by thermoplastic polyimides. They are used in wire enamels, laminates, adhesives, gears, covers, bushings, piston rings, valve seats, and in solution form as a laminating varnish. Polyimides are characterized by repeating imide linkages: There are four types of aromatic polyimides: (1) condensation products made by the reaction pyromellitic dianhydride (PMDA) [C6H2(C2O3)2] and aromatic diamines such as 4,4'-diaminodiphenyl ether [(C6H4NH2)2O]; (2) condensation products of 3,4,3',4'-benzophenone tetracarboxylic dianhydride (BTDA) [(C6H5)2CO(C2O3)2] and aromatic amines;(3) the reaction of BTDA and a diisocyanate such as 4,4'-methylene-bis(phenylisocyanate) [OCNC6H4CH2C6H4NCO]; and (4) a polyimide based on diaminophenylindane and a dicarboxylic anhydride such as carbonyldiphthalic anhydride [OC6H4(CO)2COC6H4(CO)2]. Thermoset polyimides are produced in condensation polymers that possess reactive terminal groups capable of subsequent cross-linking through an addition reaction.
Heathland can supply various plastic resins, such as polyimide, in different qualities and quantities. If you are interested in our materials, please contact us for details and material specifications.