Partially-defunctionalized aminoplast curing for polymer...

Details Partially-defunctionalized aminoplast curing for polymer... Partially-defunctionalized aminoplast curing for polymer...

C - Chemistry, Metallurgy

09

D

C09D 161/32 (2006.01) C09D 133/06 (2006.01) C09D 201/00 (2006.01) C09D 201/02 (2006.01) C08L 61/20 (2006.01)

Patent

CA 2108994

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 methyl- alkoxy 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 methyl- alkoxy 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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