Hazardous Air Pollutant Free Replacement for Specification A-A-1936A Contact Adhesive.

摘要

The goal of the Sustainable Painting Operations for the Total Army (SPOTA) program is to significantly reduce the amount of hazardous air pollutant (HAP) emissions produced in coating operations, including adhesives and sealant application and removal. This work focuses on determining a suitable HAP-free or low-HAP contact adhesive replacement for the A-A-1936A specification. A-A-1936A is a common contact adhesive specification used for commercial and military applications. The current material has a HAP content of 22 weight-percent (wt.%) and 422 g/L volatile organic compound (VOC). Six alternative low-HAP or HAP-free commercial adhesives were evaluated using high- pressure decorative plastic laminate bonded to fir plywood. Testing included edge lift, open time, and shear strength in accordance with the A-A-1936A specification. No alternatives passed all of the requisite tests in the specification, although a few adhesives passed two out of the three requirements. In particular, 3M-94 CA is the most promising alternative adhesive and should only require minor modifications to meet the specification requirements.