PEI resin are comparable to the polyester wire enamels; both resins use ethylene glycol. The diacids utilized in PEI enamels are the same as in polyester wire enamels. The imide component of PEI resins is the reaction product of an aromatic diamine or corresponding diisocyanate with two moles of trimellitic acid (TMA). the most common aromatic diamine is methylenedianiline (MDA). the resulting diimide  dicarboxylic acid (DIDA) is used asa dicarboxylic acid building block in addition to the standard diacids to form a polyester that contains imide functionality. PEI wire enamels also contain cross-linking agents such as tetrabutyl  titanate (BTM) and phenolic resins, flow additives, and occasionally other additives to improve wire properties. 

Deatherm E 641
Deatherm E 642
Deatherm E 661
Deatherm E 809
Isomid 860-M
Isomid 860
Terebec MT 533
Terebec MT 533-EF
Terebec MT 533-N
Terebec MT 533-DG
Terebec MT 533-HT
Terebec MT 533-P
Sinvar 308
H 42
Wire  Enamel 1529 H
Wire  Enamel 1598
Terebec  TR 543

Electro Insulation enamel Primary Insulation Contacts

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