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AssigneePPG Industries Ohio, Inc.
InventorsAlan J. Kaylo, Gregory J. McCollum, Steven R. Zawacky
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Provided is a biodegradation resistant cationic electrodeposition composition of a resinous phase dispersed in an aqueous medium. The resinous phase includes an electrodepositable resin having cationic onium salt groups which have been at least partially solubilized with an α-alkoxycarboxylic acid of formula (I), where R is C1 to C6 alkyl or aryl and R′ is H or C1 to C2 alkyl. Also provided is a method of electrocoating a conductive substrate serving as a cathode in an electrical circuit where the cathode and an anode are immersed in an aqueous electrodeposition bath containing the biodegradation resistant cationic electrodepositable composition described above, and substrates coated by the method.
A biodegradation resistant cationic electrodepositable composition comprising a resinous phase dispersed in an aqueous medium, said resinous phase comprising an electrodepositable resin having cationic onium salt groups, said onium salt groups having been at least partially solubilized with an α-alkoxycarboxylic acid of the following formula (I):
A biodegradation resistant cationic electrodepositable composition comprising a resinous phase dispersed in an aqueous medium, said resinous phase comprising an electrodepositable polyepoxide polymer having cationic ammonium salt groups formed from the at least partial solubilization of basic nitrogen groups with an α-alkoxycarboxylic acid selected from methoxyacetic acid, ethoxyacetic acid, butoxyacetic acid, phenoxyacetic acid, 2-(2-methoxyethoxy)acetic acid and 2-[2-(2-methoxyethoxy)ethoxy]acetic acid.
A method for coating a conductive substrate serving as a cathode in an electrical circuit comprising said cathode and an anode immersed in an aqueous biodegradation resistant cationic electrocoating composition, the method comprising passing electric current between said anode and said cathode so as to cause the electrocoating composition to deposit as a substantially continuous coating on the cathode, characterized in that the biodegradation resistant electrocoating composition comprises a resinous phase dispersed in an aqueous medium, said resinous phase comprising an electrodepositable resin having cationic onium salt groups, said onium salt groups having been at least partially solubilized with an α-alkoxycarboxylic acid of the formula (I):
A method for coating a conductive substrate serving as a cathode in an electrical circuit comprising said cathode and an anode immersed in an aqueous biodegradation resistant cationic electrocoating composition, the method comprising passing electric current between said anode and said cathode so as to cause the electrocoating composition to deposit as a substantially continuous coating on the cathode, characterized in that the biodegradation resistant electrocoating composition comprises a resinous phase dispersed in an aqueous medium, said resinous phase comprising an electrodepositable polyepoxide polymer having cationic ammonium salt groups formed from the at least partial solubilization of basic nitrogen groups with an α-alkoxycarboxylic acid selected from methoxyacetic acid, ethoxyacetic acid, butoxyacetic acid, phenoxyacetic acid, 2-(2-methoxyethoxy)acetic acid and 2-[2-(2-methoxyethoxy)ethoxy]acetic acid.
Dependencies are inferred from the claim text.