Clearcoat compositions and methods of forming clearcoat compositions

A method of forming a clearcoat composition, the method comprising the steps of:

• forming a binder portion A that comprises a polyaspartic ester resin, wherein the polyaspartic ester resin has >NH reactive groups;
• forming an activator portion B comprising:
• providing a polyisocyanate component and a polyol component, wherein the polyisocyanate component has —NCO reactive groups, the polyol component has —OH reactive groups and comprises polycaprolactone polyol, and wherein the polyisocyanate component comprises homopolymer of hexamethylene diisocyanate (HDI) in an amount of greater than or equal to 95% by weight based on the total weight of the polyisocyanate component, and wherein the homopolymer of HDI comprises trimers of HDI, wherein the polycaprolactone polyol has a number average molecular weight (MN) of from about 200 to about 2000;
• and
• forming a polyol-modified isocyanate by reacting the polyol component with the polyisocyanate component;
• and
• mixing the binder portion A and the activator portion B together to form the clear coat composition, wherein the clearcoat composition has an isocyanate index defined by (moles of —NCO reactive groups)/(moles of —OH reactive groups+moles of >NH reactive groups) of from about 0.8 to about 1.45, and wherein when the clearcoat composition is substantially cured, the clearcoat composition has a gloss retention after scratch testing per DIN EN ISO 20566 (Amtec Test) of from about 60% to about 74% and after baking at 60° C. for 1 hour or at 80° C. for 2 hours post the Amtec Test of about 70% or greater.