Syndiotactic polypropylene

Syndiotactic polypropylene (CAS 26063-22-9), commonly abbreviated as sPP, is a stereoregular form of polypropylene distinguished by its alternating monomer orientation along the polymer chain.

Unlike isotactic grades, sPP delivers superior flexibility, optical clarity, and impact resistance, making it a preferred base resin where standard polypropylene falls short on performance.

In packaging films and flexible containers, sPP provides enhanced transparency and puncture resistance compared to conventional polypropylene grades for industrial and consumer use.

Automotive interior components, including soft-touch panels and under-hood parts, use sPP to meet flexibility and low-temperature impact requirements in demanding environments.

In building and construction, it functions as a rheology modifier and plasticizing component in bitumen blends and waterproofing membranes, improving low-temperature crack resistance.

Printing and labeling substrates benefit from sPP's surface characteristics, which support ink adhesion and film processability on high-speed converting lines for commercial labeling.

Syndiotactic polypropylene is supplied as pellets or granules, with melt flow index variants available to suit extrusion, injection molding, and film casting processes.

Technical and polymer-grade specifications are standard across the market. Buyers typically source sPP in bulk bags or octabins, with specific MFI and tacticity specifications confirmed.