Abstract: A method of making aqueous solutions of polyesterimides and the resulting solutions are disclosed. The disclosed method is particularly adapted to making aqueous solutions of high molecular weight polyesterimides with low acid numbers. The resulting aqueous polymer solutions can also be made with high polymer solids content. Solubilization takes place utilizing a base to open imide bonds in the ester-imide polymer chain. The polymer solution has particular utility as a wire enamel.

Abstract: Bonding compositions are disclosed as well as bondable articles utilizing such compositions. Such bonding compositions contain a crystalline polyester material and an amorphous polyester material and exhibit thermally stable bonding properties. Such bondable articles include bondable magnet wires comprising a conductor, an insulating base coat thereon and a bonding composition coated thereover containing a crystalline polyester material and an amorphous polyester material with the wires adapted to be shaped as coils and the like and thereafter bonded together with a bond which exhibits bond strength at elevated temperatures.

Abstract: Polyesterimide polymers are provided as well as processes for preparing the same. Polyesterimide compositions are provided which can be applied as a magnet wire coating with the resulting magnet wire exhibiting excellent flexibility, heat shock, dielectric, and thermal properties. Such polyesterimide compositions can function as hot melt coating compositions for application as a magnet wire coating in a solventless process.