Loading patent…
AssigneePI Materials Research Laboratory
InventorsYoshihiro Oie, Hiroshi Itatani, Shinichi Furusaki, Yuji Yamazaki, Sadakazu Hokamura
Estimating the term…
Aromatic diamines having a carboxylic acid group and various other diamines are reacted with aromatic tetracarboxylic dianhdyrides in organic polar solvents to provide polyimides. Polyimide compositions for electrodeposition which comprise the neutralized salts of the polyimides, water and poor solvents for the polyimides have good keeping quality and when electrodeposited on electrically conductive materials, can form polyimide coats that have high levels of appearance, smoothness and denseness while exhibiting good physical and chemical characteristics in such aspects as heat resistance, electrical insulation and chemical resistance.
A polyimide composition for electrodeposition comprising a neutral salt of a polyimide which is the product of reaction between an aromatic tetracarboxylic dianhydride and an aromatic diamine, a polar solvent that dissolves said polyimide, water and a poor solvent for said polyimide, said polyimide being prepared using an aromatic diaminocarboxylic acid as part of said aromatic diamine.
Dependencies are inferred from the claim text.