| abstract |
This invention provides a paint film forming methodncomprising applying color base paint onto rigid resin parts and thennclear paint and curing the two paint films, which is characterized bynusing, as said clear paint, a clear paint comprising 60-90% by weightnof a hydroxyl-containing acrylic resin (A) and 10-40% by weight of ancuring agent (B), based on the combined solid content of the acrylicnresin (A) and the curing agent (B), n said acrylic resin (A) having a hydroxyl value of 80-160nmgKOH/g and being prepared by radical-copolymerizing (a) 8-30% bynweight of a primary hydroxyl-containing monomer selected from 4-hydroxybutyln(meth)acrylate monomers and ε-caprolactone-modifiednvinyl monomers obtained by ring-opening polymerization of ε-caprolactonenwith hydroxyalkyl (meth)acrylate; (b) 10-40% by weightnof secondary hydroxyl-containing monomer; and (c) 30-82% by weightnof still other polymerizable unsaturated monomer. |