| 摘要 |
The invention provides a resin composition comprising (A) a polymer comprisi ng at least one primary carbamate functional group and one or more 10 quaternar y ammonium groups, and (B) a carbarnate functional reactive additive that is generated in situ during the production of polymer (A). The invention also provides a method of making a electrocoat resin composition comprising (A) a polymer having at least one primary carbonate group and one or more quaterna ry ammoniwn groups and (B) a carbarnate functional 1 5 reactive additive, the method comprising reacting a monomeric polyisocyanate, and a compound comprising at least one group that is reactive with isocyanate and at least one carbamate group, so as to produce both (1) an intermediate product havin g at least one carbamate functional group and at least one isocyanate function al group, as well as (2) a carbamate functional reactive additive having no isocyanate 20 functionality, reacting said intermediate product with a compound having at least one epoxy group and at least one isocyanate reactiv e group, said reaction occuring in the presence of the reactive additive so as to produce a carbamate functional resin having at least one epoxy group, reacting said at least one epoxy group with a tertiary amine compound in the presence of an acidto provide a carbamate functional resin having 25 one or more quaternary ammonium groups, said reaction occurring in the presence of the reactive additive to provide a resin composition comprising (A) a carbamate functional resin having one or more quaternary ammonium groups and (B) a carbarnate functional reactive additive. Finally, the invention provid es electrocoat coating compositions comprising 30 the resin composition of the invention and a method of using said electrocoat coating compositions.</SDOA B>
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