ADDITIVES | ANTIOXIDANTS AND STABILISERS
tion areas,” says Dr Klaus Bergmann, Head of Polymer Additives at Brüggemann. “With the introduction of these new products we are further extending our portfolio of high-performance stabilisers to provide even more value to our customers.” Elsewhere in the PA sector, Clariant says one of
Figure 6: Effect on elongation of PA resins using different stabilisation systems after 1,000h Xenon arc lamp accelerated weathering test (ASTM G155) Source: Everlight
addition of 0.5% Eversorb PA3, the sample surface showed no cracking and the gloss value remained almost unaltered. Severe surface cracking may also lead to
impaired physical properties. After exposure of 1,000h of Xenon arc lamp accelerated-weathering test (ASTM G155 standard), the retained elonga- tion of a PA with UV-234 decreased to 62%, while the PA with Eversorb PA3 again showed almost no difference (Figure 6). The latest PA stabilisers from Brüggemann include Bruggolen TP-H1607 and Bruggolen TP-H1805. TP-H1607 is a proprietary copper-based stabiliser package that is claimed to extend long term mechanical property retention beyond the current limits for existing copper salt-based antioxidants. Tests show the grade enables heat stabilisation of unreinforced PA 66 beyond 5,000 hours at 150°C (the company claims conventional copper salt-based stabilisers level off at 3,000 hours at this temperature). The company says this high efficiency presents the opportunity to dramati- cally reduce copper and halogen content. The TP-H1805 product is described as an easily
processable high heat stabiliser package that lifts the limit for continuous-use temperatures up to 200°C for glass reinforced PA6 and beyond 200°C for PA66. The system does not require prior activation and is also effective at temperatures below 200°C, which the company says means compounders can develop cost efficient aliphatic polyamide-based materials for border line applica- tions previously reserved for higher priced PPAs or other high performance polymers. “Our goal is to offer heat stabilisers for polyam- ides across all temperature ranges and all applica-
52 COMPOUNDING WORLD | September 2020
its latest high-performance stabilising additives, AddWorks TFB 117, is “raising the processing and performance bar” of PA intended for clothing, carpets and industrial textiles such as cable jackets and automotive fabrics. “The resins and fibres are easier to spin or injection mould, even at low temperatures, and retain superior strength and colour protection to extend the service life of their final application,” Clariant says. AddWorks TFB 117 has good compatibility with
all PAs, including PA6, PA66, and copolymers, which Clariant says ensures productivity benefits during polymerisation. “The process is therefore more sustainable with higher throughput when compared to existing state-of-the-art additives systems: for example, 20-30% shorter polymerisa- tion,” the company claims. The company adds that in fibre production it
helps reduce filament breakage by up to 25-30% in high speed spinning whether added into polymeri- sation or in compounding. “Importantly, introducing the new additive at either phase delivers stronger fibres with signifi- cantly improved light and thermal stabilities as well as mechanical properties,” the company says. “The in-built light and thermal stability mean that both the consistent colour and high tensile strength is protected.” AddWorks TFB 117 is already being used to
produce PA66 carpets. “Customers are also actively exploring its use in high temperature nylons for a smooth processing at lower processing tempera- tures,” Clariant says, adding that AddWorks TFB 117 is compatible with other additives and compo- nents used in PA.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.siigroup.com �
www.baerlocher.com �
www.solvay.com �
www.byk.com �
www.adeka.co.jp �
www.basf.com �
www.rianlon.com �
www.songwon.com �
https://en.ecic.com/ (Everlight) �
www.brueggemann.com �
www.clariant.com
www.compoundingworld.com
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