abstract |
The multilayer coating system is a first basecoat layer formed of a first coating composition comprising hydroxyl functional polymer core-shell particles and a free polyisocyanate having a weight average molecular weight of less than 600 g/mol, wherein 600 g The amount of free polyisocyanate having a weight average molecular weight of less than /mol is 3.5% by weight or more, the first basecoat layer; a second basecoat layer formed of a second coating composition comprising carboxylic acid functional polymer core-shell particles; and a topcoat layer formed of a coating composition comprising a free polyisocyanate and a film-forming resin reactive with the free polyisocyanate. |