Abstract
Environmental regulations controlling paint use vary widely between states/cities/counties and undergo constant change. Regardless of locality, however, allowable volatile organic content (VOC) levels are being reduced. All federal government agencies must now fully comply with any state/city/county regulations. In addition, zinc chromate primers are banned by the US Department of Defense (DOD). DOD plans to reduce allowed lead levels in paints for military applications to 50 parts per million by 1994 wherever possible. In order to meet these challenges, the US Navy must constantly reformulate existing military specification (MILSPEC) paints or qualify commercial products. Commercial paints must perform as well or better than MILSPEC paints. Substitute paints with VOC levels significantly below current requirements are most desirable. The US Navy is continuing extensive testing and evaluation programs for several new compliant paint substitutes, including single component polyurethanes. Paints which exhibited superior performance in a recent study remain under continual beachfront exposure and will be compared to new paints from the present study.