A water soluble wire enamel

A Water Soluble Wire Enamel has been developed and successfully coated on copper and aluminum magnet wire. The story of the development of the polymer, its brainstorming, planning and evaluations are related. The film properties of this water-soluble polyester are approximately equal to solvent polyesters. Cresylic acid is no longer needed. Costs are approximately equal to solvent enamels. Because wire coaters were concerned about the emissions from their operations, this program was initiated to formulate wire enamels that would have acceptable effluent levels. This development was a joint venture of the Sherwin-Williams Company and Packard Electric, General Motors Division.