| 摘要 |
PARTIALLY-DEFUNCTIONALIZED AMINOPLAST CURING FOR POLYMER COMPOSITIONS A method of producing a cured coating is described comprising the steps of: (A) applying a coating composition on a substrate, wherein the coating composition is a curable coating composition comprising: (1) a polymer comprising functional groups that are reactive with methylol and/or methylalkoxy substituents on the amino nitrogens of an aminoplast curing agent, and (2) an aminoplast curing agent that includes, as substituents on the amino nitrogens: (a) a plurality of methylol and/or methylalkoxy substituents, and (b) one or more substituents that are either non reactive with the functional groups on the polymer or are reactive with the functional groups at a higher temperature than the temperature at which the methylol and/or methylalkoxy substituents are reactive with the functional groups, and (B) curing the coating at a cure temperature sufficient to react the functional groups on the polymer with the methylol and/or methylalkoxy substituents, but below the temperature for reaction, if any, between the functional groups and the (b) substituents.
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