HIGH-PERFORMANCE STYRENIC BLOCK COPOLYMERS FEATURING A NOVEL HYBRID MIDBLOCK PHASE

摘要

Two families of non-hydrogenated styrenic block copolymers(SBC)have been widely used in a variety of hot-melt adhesive applications:styrene-isoprene-styrene block copolymers(SIS)and styrene-butadi-ene-styrene block copolymers(SBS).Both have unique physical properties and are used in large volumes in their respective application fields.Blending of SIS and SBS into a single formulation can also make economically attractive packaging tape and disposable nonwoven adhesives;improve the hot-melt stability of adhesives;or improve label converting(matrix stripping without adhesive threads).The downside to blending SIS/SBS is that it requires more complex formulating and may afford less than optimal properties when compared to analogous SIS-based formulations.'