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US 4,031,050 AGranted
Cationic electrodepositable compositions of blocked NCO and acid salt of adduct of amine and polyepoxide
AssigneePPG Industries, Inc.
InventorRobert D. Jerabek
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Abstract
It has been found that aqueous coating compositions comprising a blocked organic polyisocyanate, an amine adduct of an epoxy group-containing resin, and optionally a catalyst for urethane formation can be electrodeposited. These compositions deposit on the cathode to provide coatings having excellent properties.
Claims6
A composition comprising:
- A. a synthetic hydroxyl-containing adduct which is the reaction product of a primary or secondary amine and a polyepoxide, said adduct being solubilized with acid to provide cationic groups in said adduct,
- B. a blocked polyisocyanate stable at ordinary room temperature in the presence of said adduct and reactive with said adduct at elevated temperatures.
An aqueous electrodeposition bath which is an aqueous dispersion comprising:
- A. a solubilized hydroxyl-containing synthetic adduct which is the reaction product of a primary or secondary amine and a polyepoxide, said adduct being solubilized with acid to provide cationic groups in said adduct,
- B. a blocked polyisocyanate stable at ordinary room temperature in the presence of said adduct and reactive with said adduct at elevated temperatures.
Dependencies are inferred from the claim text.