Syndiotactic polypropylene

Syndiotactic polypropylene (CAS 26063-22-9), abbreviated sPP, is a stereoregular polypropylene with alternating monomer orientation along the polymer chain.

Where is Syndiotactic polypropylene used?

• Packaging films and flexible containers: enhanced transparency and puncture resistance versus conventional grades
• Automotive interiors: soft-touch panels and under-hood parts meeting flexibility and low-temperature impact requirements
• Building and construction: rheology modifier and plasticizing component in bitumen blends and waterproofing membranes, improving low-temperature crack resistance
• Printing and labeling substrates: surface characteristics supporting ink adhesion and film processability on high-speed converting lines
• Unlike isotactic grades, sPP delivers superior flexibility, optical clarity and impact resistance.

Good to know: Unlike isotactic grades, sPP delivers superior flexibility, optical clarity and impact resistance where standard polypropylene falls short.

Commercial specifications

• Melt flow index variants for extrusion, injection molding and film casting
• MFI and tacticity specifications confirmed by buyers