ADDITIVES | ANTIOXIDANTS


BASF antioxidants make light work – on water


BASF says its light stabilisers are helping pontoons for floating solar panel systems last longer under intense sunlight in projects by Shanghai Qihua Water Photovoltaic Engineering in China, which is using Chimassorb and Tinuvin additives to make the high density polyethylene (HDPE) mountings that allow the panels to float in service. Blow moulded in HDPE, the pontoons are precision-engineered mountings that support the panels on lakes and reservoirs. The compounds use UV-absorbers


to prevent degradation and discolora- tion of the polymer and light stabilisers to provide the required durability in the demanding outdoor applications. “The combination of the Tinuvin UV absorber with Chimassorb HALS provides synergistic effects and can meet the design criteria for enhanced service life of pontoons,” says Her- mann Althoff, Senior Vice President Performance Chemicals Asia Pacific at BASF.


Shanghai Qihua has already embarked on several projects with the


Pontoons for floating solar panel systems in China are blow moulded in HDPE containing light stabilisers from BASF


panels in China, including a 55MW scheme in a coal mining subsidence area of Huainan and Huaibei province, a 30MW project in Jiangsu Yancheng, and a 200MW project in Vietnam. Company Chairman Kong Fei says BASF’s plastic additive package provides the confidence to offer 25-year warranties. “This helps us to expand our business to overseas markets,” he says. Floating systems can be up to 18%


based stabiliser blends,” the company says. “It improves long-term heat aging stabilisation compared to conventional phenolic systems, extending the temperature range to reach peaks of 180°C, something not possible with standard phenolics.”


Elevated performance The new Bruggolen TP-H1607, meanwhile, is described as a high-performance and cost-effec- tive copper iodide-based stabiliser for where long-term resistance at elevated temperatures up to 180°C is a priority. “Its effectiveness significantly exceeds that of the


traditional copper iodide/potassium iodide stabilisers without making any compromises in terms of material properties,” the supplier says. “As a result, the required thermal protection is reached with very low concentrations – a particular advan- tage in E+E applications.” A third new addition, Bruggolen TP-H1805,


92 COMPOUNDING WORLD | September 2019


more expensive than land-based alternatives due to the need for floats and more resilient electrical compo- nents. However, the projects avoid use of forest and farming land while the water can be used to cool the panels, increasing the efficiency by as much as 10%. Floating solar power systems are also said to be comparatively easy to install and decommission. � www.basf.com


stabilises fibre-reinforced aliphatic polyamides for long-term use at temperatures up to 200°C for PA6 or up to 230°C for PA66. Brüggemann says this enables compounders to tailor-make products for applications in borderline areas that were until now the preserve of polyphthalamides or other high- performance polymers such as PPS. According to the company, separate activation of the stabiliser system is not needed.


CLICK ON THE LINKS FOR MORE INFORMATION: � www.siigroup.com � www.doverchem.com � www.basf.com � www.sabo.com � www.adeka.co.jp � www.clariant.com � www.solvay.com � www.baerlocher.com � www.byk.com � www.brueggemann.com


www.compoundingworld.com


PHOTO: BASF


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