AQUEOUS BINDER SOLUTIONS
The present invention is directed to aqueous systems for polyamideimide, polyether imide, and/or polyamic acid binder solutions. The present invention provides stable aqueous binder solutions equivalent or superior to current aqueous binder solutions.
1 . An aqueous binder solution comprising a) water, b) polyamideimide or polyether imide, c) an amine, and d) one or more solvent; wherein the one or more solvent comprises guanidines.
2 . An aqueous binder solution of claim 1 further comprising one or more of: viscosity modifiers, thinning solvent, binders, pigments, fillers, dispersing aids, surface tension modifiers, and fluoropolymers.
3 . The aqueous binder solution of claim 2 wherein the thinning solvent is a diether, an alcohol, or a glycol ether.
4 . The aqueous binder solution of claim 1 , wherein the solvent is selected from acetoacetamide, dimethyl acetoacetamide, n-methyl acetoacetamide, diethyl acetoacetamide, dimethyl piperidone,comprises tetramethyl guanidine, dimethyl sulfone, dl-pantothenyl, n-acetylcaprolactam, or a mixture thereof.
5 . The aqueous binder solution of claim 1 wherein the c) amine and d) solvent are the same.
6 . The aqueous binder solution of claim 5 wherein the c) amine and d) solvent are both tetramethyl guanidine.
7 . (canceled)
8 . (canceled)