Controlled Rheology Polypropylene

Polypropylene (PP) produced with Ziegler-Natta catalysts typically has a broad molecular weight distribution (MWD). This results in a very high melt elasticity which causes problems with high-speed equipment.

By addition of specific organic peroxides to PP in an extruder, the problem can be overcome, allowing for controlled degradation of the polymer (visbreaking). Controlled rheology polypropylene (CR-PP) extends and improves the characteristics of PP.

Organic peroxides narrow MWD and at the same time reduce average molecular weight. The decrease in melt viscosity, expressed by an increase in melt flow index (MFI), is controlled by the amount of peroxide. Applications include PP film, extrusion coating, fibers (spunbond, meltblown) and injection molding.

Trigonox® 301, the most efficient organic peroxide for CR-PP visbreaking

Our range of organic peroxides for modification of polymers is the world’s largest, including Trigonox 301, the latest generation of our organic peroxides for CR-PP. This AkzoNobel invention is patented and offers a number of advantages over commonly used modifiers.

Cost-effective, optimal organoleptic properties & food contact approved

Trigonox 301 is very cost-effective and releases low amounts of volatile decomposition products. It also shows very good organoleptic properties and has been approved for food contact applications by both BfR (0.25% max.) and FDA (0.375% max.).

Contact us for more information.