Search Results

This article focuses on new findings related to the scratch resistance of two-component polyurethane clear coats under a variety of conditions (methods) and with differing media (dry abrasives, wet abrasives, etc.). The results are discussed in connection with polymer structure data and other important film properties, such as acid etch resistance.

The increased occurrence of environmental damage to automotive topcoats and the variety of abrasive conditions to which the coating is subjected have made increasing demands on the properties of these coatings. There is as yet, no single paint chemistry that fulfills these extreme requirements in all respects. On the other hand, the right choice of components in polyurethane can result in excellent etch resistance as well as improved scratch resistance compared to traditional melamine/acrylic systems. This paper will discuss some recent studies in the areas of two-component and one-component polyurethane chemistry, which address these rigorous quality requirements.