| 摘要 |
The invention provides a polymer (a) having a polymer backbone having append ed thereto at least one carbamate functional group, the polymer represented by randomly repeating units according to formula (I) , wherein R1 represents H or CH3, R2 represents H, alkyl, or cycloalkyl, L represents a divalent linking group, A represents repeat units comprising at least one repeat unit having a pendant carboxylic acid group, x represents 10 to 90 weight %, and y represents 90 to 10 weight %. The invention further provides an anodic electrocoat coating composition comprising an aqueous dispersion cf a polymer (a) and (b ) a compound having a plurality of functional groups that are reactive with said carbamate groups, wherein the repeat units A of polym er (a) having a pendant carboxylic acid group are base-salted. Finally, the invention provides an anodic electrodeposition method requiring 1) immersing a conductive substrate in a coating composition comprising, in an aqueous medium, polymer (a) and (b) a compound having a plurality of functional groups that are reactive with said carbamate groups, 2) applying a voltage between a cathode and the conductive substrate, and 3) removing the substrate from the coating composition.
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