Biodegradation-resistant electrodepositable coating...

Details Biodegradation-resistant electrodepositable coating... Biodegradation-resistant electrodepositable coating...

C - Chemistry, Metallurgy

25

D

C25D 13/10 (2006.01) C09D 5/44 (2006.01) C25D 13/00 (2006.01)

Patent

CA 2386266

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 .alpha.- alkoxycarboxylic acid of formula (I), (see 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.

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