Preparation of encapsulated aluminum pigments by emulsion polymerization and their...

INTRODUCTION

Aluminum flakes are a selected class of pigments in coatings,[1] which are used in basecoats to achieve a certain metallic appearance in combination with an angle-dependent color change, the so-called "flop-effect." To achieve this desired effect, the flat, metallic flakes have to be oriented parallel to the substrate surface. This orientation can be achieved by an appropriate rheology profile and strong film shrinkage (solvent evaporation) during application and drying. Due to these rheology and shrinking requirements, solventborne basecoats contain the highe