Flexsys unveils ‘world-first’ 6PPD alternative for tire rubber

Akron, Ohio – US-based tire additives supplier Flexsys has claimed a breakthrough with the introduction of “the industry’s first viable alternative” to 6PPD antioxidants.

The development follows “years of intensive research” by the company in collaboration with federal and independent research laboratories, the company said 20 Nov.

Leaching of antioxidant/antiozonant 6PPD from tire wear particles has been linked to mortality of certain species of salmon and trout in the US – via transformation by-product 6PPD-quinone.

Without providing further details, Flexsys said its alternative employs chemistry outside the 'PPD family', so avoiding the formation of 'quinone' by-product entirely.

According to Flexsys, its R&D team 'is on track' to meet targets including “providing short- and long-term protection to tires against degradation” while maintaining high safety standards and durability.

Furthermore, Felxsys said introducing the replacement involves ‘minimal change' in rubber compound formulations, while the new additives are also said to meet environmental and regulatory benchmarks.

Flexsys is now engaged in ‘extensive testing’ to allow 6PPD to be replaced at a rapid pace, meet tire safety standards and comply with environmental regulations.

The Akron-based company said it is also optimising the process chemistry to allow for “efficient world-scale production.”

The company is also continuing its work with regulatory agencies globally to have the new chemistry fully approved for commercial use.