ADDITIVES | ANTIOXIDANTS/STABILISERS


mixed plastics. “Additives will play a key role in enabling high quality performance of recycled materials while mitigating any negative interactions associated with contamination in the material stream.”


BASF Plastic Additives will soon launch two specific antioxidants as Biomass Balanced (BMB- cert) grades. The additives will enable customers to produce polymer grades that have a significantly lower product carbon footprint than conventional offerings. As the substitution is based on the International Sustainability and Carbon Certifica- tion (ISCC) Plus mass balance attributed content concept, customers can expect identical product performance with no change to specification or regulatory status (so no requalification required). The company has received (ISCC) PLUS certifica- tion for certain grades of plastics additives pro- duced at manufacturing sites in Kaisten in Switzer- land and McIntosh in Alabama in the US. It says the two sites are acting as pilots prior to global implementation.


Floating ideas


BASF has also developed a new UV stabiliser system, Tinuvin 2730 ED, which is formulated to extend the lifetime of polyolefin in high exposure conditions to more than 30 years. The company


expects it to play a role in expanding installation of floating plastic photovoltaic (PV) systems, which provide an alternative to land-based installations that do not compete with agriculture or other requirements. A proof-of-concept floating solar system has


already been installed at BASF’s McIntosh additives manufacturing site at Alabama in the US as part of its 2050 net zero CO2


emissionsprogramme.


Developed in conjunction with Noria Energy, the floating pontoon solar system features a flat-pack design based around a TPO floating frame. The pilot system powers three aerators that are used to improve water quality in a pond at the facility. “Now that we have the installation and the proof


of concept at McIntosh, they’re [Noria Energy] working with our energy management team to look at installations at our Wyandotte site. That’s also going to be a large-scale pilot for the Noria-specific design, which will be a hundred times the size of the pilot we have in place. We’re also looking into our Geismar Verbund site, which currently can support a 5 MW system,” according to Neil DeLog- gio, BASF’s Business Development Manager for Plastic Additives in the Americas. The Baeropol T-Blend product line from Baerlocher, which includes its Baeropol RST stabiliser, has formed the basis for a set of additive


Stabilisation key to TPO roofing success


Polyolefin-based roofing membranes have achieved a prominent position in low-slope roofing solutions in North America, according to Andrea Landuzzi, Global Marketing Director Technology Solutions – Polymer Additives at Solvay, and that success is now spurring considerable interest in both Europe and Asia, where TPO products are gaining market share against PVC, bitumen and other materials. The key attractions of TPO mem-


branes include good physical performance, puncture resistance, flexibility, and ease of fabrication, installation and sealing. A further attraction, Landuzzi says, is that they are design-friendly, supporting easy integration of building integrated and building applied photovoltaic (BIPV and BAPV) systems.


Extending service lifetimes is an 58 IMAGE: SOLVAY


Solvay says latest TPO roofing membranes require advanced stabilisation chemistry


important goal for membrane manufacturers, who are looking for advanced stabilisation systems that provide the required durability in the most extreme thermal and UV conditions and that will accommodate forecast climate change impacts. Solvay’s Cyasorb Cynergy Solutions B Series stabilisers are said to provide very good UV resistance (to 60 kJ/m2


) COMPOUNDING WORLD | September 2023


and thermal stability (up to 135°C) in TPO membrane formulations, surpass- ing the current standards for TPO sheet roofing in North America, Europe and China. Membranes produced using the additive are discoloration resistant and protected against microcrack formation, the company says. � www.solvay.com


www.compoundingworld.com


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