Development of Automotive Metallic Finishes by Non-aqueous Polymer Dispersions (NAD)

Abstract

The coatings composed of a mixture of NAD/solution acrylic polyol/melamine formaldehyde resin give a typical two-phase structured system, not only in liquid enamel, but also in crosslinked filmes with discrete polymer particles, which brings out specific features in the coatings performance. Especially in the area of automotive metallic finishes, NAD has been used extensively to improve their rheology, mechanical properties and durability. The mechanism of the rheological control of the coatings by NAD particles is mainly discussed.