| abstract |
The invention relates to a double coating, a curing process, a cured coating and a kit. A first layer of the double coating may be a first curing coating composition, which has a first hydroxy functional resin, a first curing agent and a nonpolar catalyst. A second layer of a second cure coating composition may have a second hydroxy functional resin, a second crosslinking agent, and a polar catalyst. The non-polar catalyst catalyzes the crosslinking between the second hydroxy functional resin and the crosslinking agent, but not between the first hydroxy functional resin and the crosslinking agent. The polar catalyst catalyzes the crosslinking between the first hydroxy functional resin and the crosslinking agent, but not between the second hydroxy functional resin and the crosslinking agent. The polarity of the catalysts can facilitate catalyst migration from one layer to another. The separated compositions may be storage stable and / or curing may occur at low temperatures. |