ADDITIVES | ANTIOXIDANTS AND STABILISERS
A stabiliser blend shows improved properties for PP automotive compounds Source: SI Group
Development for Plastic Additives at BASF. “BASF’s NOR [non-basic aminoether] HALS [hindered amine light stabilisers] solutions improve stabilisa- tion by moving beyond solutions based on secondary and methylated HALS. Through collabo- ration with agricultural plastic producers as well as farmers, we facilitate the exchange of knowledge and expertise, creating solutions that will ultimately lead to improved crop yield.” The new stabiliser is part of BASF’s Valeras
portfolio, which the company says is designed to help users meet their sustainability goals. Renew- able electricity is used to manufacture the additive, and the product form improves material dosing precision, among other benefits, the company says. Other key areas for UV stabilisers are rotomould-
ed products that require long-term outdoor stability for uses such as water tanks or kayaks. “We’re seeing greater demand for longer outdoor lifetimes,” said Joe Fay, Principal Scientist at BASF. The company’s Tinuvin IS 2520 stabiliser, part of the Valeras portfo- lio, is designed to provide 10-15 years outdoor lifetime. It is optimised for rotational moulding, where it provides faster cure, faster cycle time, colour stability and a broader processing window. BASF launched its first biomass-balanced plastics additives, certified by TÜV Nord for mass balance according to the International Sustainabil- ity and Carbon Certification (ISCC Plus) system, which supports using renewable feedstock to replace fossil feedstock and contributes to sustain- able development by ensuring chain of custody along the value chain. The products are “drop-ins” to their conventional counterparts that provide identical performance as well as identical quality, product stewardship, and regulatory aspects, and thus do not require requalification or reformulation.
28 COMPOUNDING WORLD | September 2024 “At the beginning of the value chain, fossil-
based raw material is replaced by ISCC certified bio-based feedstock and a corresponding amount is attributed to the product according to a mass balance approach,” said BASF. “Via the attribution of these sustainably sourced renewable feedstocks, the product’s cradle-to-gate carbon footprint is significantly reduced by up to 60%, compared to the global average product carbon footprint of conventional grades.” The first BASF products to be certified and included in the company’s Valeras portfolio are the workhorse antioxidants, Irganox 1010 BMBcert and Irganox 1076 FD BMBcert. The products will initially be produced at BASF’s site in Kaisten, Switzerland. SI Group’s ANOX NDB S2225 for automotive PP compounds provides enhanced thermal protection, lower VOC emissions, and improved colour stability at lower loadings. The company says the product is well suited for PP blends rich in virgin PP resin.
Food safety SI Group announced in March 2024 that it had received expanded approval from the US FDA for use of its phosphite antioxidants Weston 705 and Weston 705T, permitting use in PET food packag- ing. The nonylphenol-free stabilisers already have broad approval for use in various polymers for food-contact packaging in various regions, includ- ing the US, Canada, the EU and China. The new approval allows use in PET polymers at levels not to exceed 2,000 ppm under conditions of use A (> 212° F) through H (frozen). Dover Chemical announced that the European
Food Safety Agency (EFSA) has published a safety assessment endorsing Doverphos LGP12 (liquid green phosphite) for EU food contact. The com-
www.compoundingworld.com
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