Water-dispersible cationic polyurethane resins
Abstract
Abstract WATER-DISPERSIBLE CATIONIC RESINS, AND ESPECIALLY POLYURETHANE RESINS, ARE PROVIDED BY REACTING A RESIONOUS POLYEPOXIDE WITH A STOICHIOMETRIC DEFICIENCY OF PPOLYISOCYANATE TO PROVIDE AN HYDROXY-FUNCTIONAL POLYURETHANE IN WHICH TERTIRY AMINE FUNCTIONALITY IS GENERATED BY REACTION WITH A MONOSECONDARY AMINE TO PROVIDE DISPERSIBILITY IN WATER WITH THE AID OF AN ACID. SOME OF THE EPOXY FUNCTIONALITY IS CONSUMED BY ESTERIFICATION WITH A MONOCARBOXYLIC ACID TO PROVIDE INTERNAL PLASTICIZATION AND ENHANCE FILM FORMATION. THIS IS ESPECIALLY IMPORTANT WHEN THE RESINS ARE ELECTRODEPOSITED AT THE CATHODE. THE MONOCARBOXYLIC ACID MAY BE UNSATURATED TO PROVIDE A BASIS FOR CURE WHICH IS INDEPENDENT OF THE HYDROXY FUNCTIONALITY.
Inventors
- 👤 K Sekmakas
Bibliographic Details
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