| 摘要 |
An anionic electrocoating composition is provided including an electrodepositable beta -hydroxyalkylamide curing agent and an electrodepositable polymer capable of crosslinking with the curing agent. This curing agent includes an organic radical that (a) contains from 8 to 60 carbon atoms; (b) is derived from a substituted or unsubstituted aliphatic, alicyclic or aromatic hydrocarbon radical; and (c) is bonded to n beta -hydroxyalkylamide groups, wherein n is an integer from 1 to 4, to form <IMAGE> where R1 can be H or a substituted or unsubstituted aliphatic, alicyclic or aromatic group containing up to 6 carbon atoms; where R2 and R3 can be the same or different and can be H or a substituted or unsubstituted aliphatic, alicyclic, or aromatic group containing up to 36 carbon atoms; where R4 can be H or a substituted or unsubstituted aliphatic group containing up to 8 carbon atoms when n is an integer form 2 to 4, and a beta -hydroxy substituted aliphatic group containing up to 6 carbon atoms when n is 1; where A is the organic radical; where x is the valency of the organic radical and an integer greater than or equal to n; and where R1, R2, R3, R4 and A, either individually or combined, have a carbon chain length, or substituted groups, or both, such that the resulting curing agent has a lipophilic nature enabling it to associate with the organic phase of the electrocoating composition and deposits onto a conductive during an anionic electrocoating process.
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