New High-Efficiency Styrenic Block Copolymers, Tackifier for Adhesives Shawn W. Mowry Ph.D. January 1, 2009 To achieve improved adhesive performance, two high-efficiency four-arm radial styrene-isoprene-styrene (SIS) block copolymers were developed by Dexco Polymers L.P. for hot-melt adhesive (HMA) and pressure-sensitive adhesive (PSA) applications. Read More