Process for forming multi-layered coatings and multi-layered coating

摘要

The present invention provides an improved 2 wet coating system. The present invention relates to a process for forming a multi layered coated film comprising the steps of: (I) forming an uncured electrodeposition coated film on an electrically conductive substrate, (II) applying an intermediate coating on the electrodeposition coated film, and then simultaneously heating and curing the uncured electrodeposition coated film and the uncured intermediate coated film; then, (III) forming an uncured base coated film on the intermediate coated film, (IV) applying a clear top coating on the base coated film, and then simultaneously heating and curing the uncured base coated film and an uncured clear coated film; wherein the electrodeposition coating forms a self-stratifying coated film comprising two layers alpha and beta , and the dynamic glass transition temperature of the resin layer ( alpha ) in direct contact with the electrically conductive substrate and that of the resin layer ( beta ) in direct contact with the intermediate coated film are controlled.The present invention provides an improved 2 wet coating system. The present invention relates to a process for forming a multi layered coated film comprising the steps of: (I) forming an uncured electrodeposition coated film on an electrically conductive substrate, (II) applying an intermediate coating on the electrodeposition coated film, and then simultaneously heating and curing the uncured electrodeposition coated film and the uncured intermediate coated film; then, (III) forming an uncured base coated film on the intermediate coated film, (IV) applying a clear top coating on the base coated film, and then simultaneously heating and curing the uncured base coated film and an uncured clear coated film; wherein the electrodeposition coating forms a self-stratifying coated film comprising two layers alpha and beta , and the dynamic glass transition temperature of the resin layer ( alpha ) in direct contact with the electrically conductive substrate and that of the resin layer ( beta ) in direct contact with the intermediate coated film are controlled.