Zwitterion-containing compositions
AssigneePPG Industries, Inc.
InventorsMarco Wismer, Joseph F. Bosso
Life of this patent
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Abstract
Synthetic resins which are water-dispersible Zwitterion-containing resins and containing chemically-bound quaternary ammonium base groups can be dissolved or dispersed in water to provide aqueous coating compositions. Such compositions in which these resins are the major resinous component can be applied by electrodeposition and deposit on the cathode to provide coatings of improved properties including a high degree of resistance to corrosion or staining.
Claims8
An ungelled, inherently water-dispersible, substantially epoxy group free, electrodepositable synthetic organic resin containing Zwitterions, said Zwitterions consisting of a quaternary ammonium base group and a carboxyl group which are derived from the reaction of an epoxy group-containing resin with an amino acid, solutions of said synthetic organic resin being substantially free of dissociated counter-ions.
A method of preparing an ungelled, substantially epoxy group free, inherently water-dispersible, electrodepositable resin which comprises reacting a 1,2-epoxy group containing resin with an amino acid, thereby forming a resin containing quaternary ammonium Zwitterions, solutions of said resin being substantially free of dissociated counter-ions.
Dependencies are inferred from the claim text.