Abstract: Disclosed herein is a method for preparing a multilayer coating system on a substrate including at least the steps of applying a first primer coating material composition to a substrate (step (1)), applying a second base coating material composition to the first coating film formed in step (1) prior to curing the first coating film and forming a second coating film (step (2)), applying a third clear coating material composition to the second coating film formed in step (2) prior to curing the second coating film and forming a third coating film (step (3)), and jointly curing the first, second and third coating films (step (4)).

Abstract: Disclosed herein is a method for preparing a multilayer coating system on a substrate including at least the steps of applying a first coating material composition to a substrate (step (1)), applying a second coating material composition to the first coating film formed in step (1) prior to curing the first coating film and forming a second coating film (step (2)) and jointly curing the first and second coating films (step (3)).

Abstract: A double coating, curing method, cured coating, and kit are provided. A first layer of the double coating can be a first cure coating composition, which has a first hydroxy-functional resin, a first crosslinking agent, and a non-polar catalyst. A second layer of a second cure coating composition can have a second hydroxy-functional resin, a second crosslinking agent, and a polar catalyst. The non-polar catalyst catalyzes crosslinking between the second hydroxy-functional resin and crosslinking agent, and not between the first hydroxy-functional resin and crosslinking agent. The polar catalyst catalyzes crosslinking between the first hydroxy-functional resin and crosslinking agent, and not between the second hydroxy-functional resin and crosslinking agent. The polarity of the catalysts can facilitate catalyst migration from one layer to the other. The separate compositions can be shelf-stable and/or the curing can occur at low temperature.

Abstract: A double coating, curing method, cured coating, and kit are provided. A first layer of the double coating can be a first cure coating composition, which has a first hydroxy-functional resin, a first crosslinking agent, and a non-polar catalyst. A second layer of a second cure coating composition can have a second hydroxy-functional resin, a second crosslinking agent, and a polar catalyst. The non-polar catalyst catalyzes crosslinking between the second hydroxy-functional resin and crosslinking agent, and not between the first hydroxy-functional resin and crosslinking agent. The polar catalyst catalyzes crosslinking between the first hydroxy-functional resin and crosslinking agent, and not between the second hydroxy-functional resin and crosslinking agent. The polarity of the catalysts can facilitate catalyst migration from one layer to the other. The separate compositions can be shelf-stable and/or the curing can occur at low temperature.