ADDITIVES | ANTIOXIDANTS & STABILISERS
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Songwon’s XP2085 experimental processing stabiliser for PP can help polymer producers meet more demanding VOC require- ments in automotive
levels in interior TPO automotive applications, Schmutz says. “For example: Songxtend 2124 for under the hood and Songxtend 2123 for car interiors.”
Technical solutions OKA-Tec specialises in stabilisers for technical plastic applications that require improved long-term heat stabilisa- tion and chemical resistance. Managing Director Peter Jan Peters highlights Okabest P808, which he says is an excellent thermal stabilisation booster for antioxidant systems used in polyolefins and other thermoplastics such as PC/ABS and POM (acetal). “It provides great synergistic effects with primary antioxidants like Irganox 1010 and secondary antioxidants like HALS or DSTDP,” he says. Okabest P808 is also a very efficient scavenger
of VOCs “and particularly appropriate for com- pounds used in automotive parts which have to fulfil new emissions requirements in automotive industry like the Chinese GBIT 27630-2011,“ Peters says. He also points to Okaflex EM, an organic long-term heat stabiliser for all types of polyamides where application temperatures can extend up to 200°C. It also improves long-term resistance to typical automotive fluids such as lubricants, hot oils, glycols, coolants, electrolytes and cleaning agents. “Okaflex EM shows permanently advantageous electrical properties, such as a high CTI tracking resistance of at least 600 V (according to IEC 112) and very good contact corrosion resistance, so is therefore also ideally suited for future applications in vehicle construction as well as in electrical engineering and electronics (E+E),” says Peters.
PHOTO: SONGWON
Adeka Polymer Additives Europe (APAE) reports that it has finished registering its polymer additives range under the EU REACH program. The range includes ADK STAB PEP-36, which the company says is the only organophosphite processing stabiliser with a proven contribution to long term thermal stability,
as well as a portfolio of hindered amine light stabilisers (HALS), including low interacting types. A spokesperson for the company says that ADK STAB LA-502XP, a synergistic HALS blend based on ADK STAB LA-52SC, not only contributes to outstanding weathering stability, but also delivers extra perfor- mance in PP formulations that are subject to heat exposure, such as in automotive applications (Figure 4a and 4b).
Phosphite alternatives At the NPE 2018 show in Orlando earlier this year, Baerlocher USA, part of Baerlocher Group, introduced a new generation of its Baeropol RST resin stabilisation technology. It says Baeropol DRS 6812 is a key component of its expanding Bae- ropol RST global technology platform. “The new additive delivers improvements in melt stability, polymer colour and antioxidant solubility and can be used as a replacement for most secondary phosphite antioxidants,” the company claims. “The rapidly growing polyolefin market, includ- ing the circular recycling economy, requires new stabilisation technologies that can solve the challenges facing traditional phosphite additives, such as limited solubility that can lead to process-
Figure 4a and 4b: Data showing gloss retention of a black PP-GF40 formulation after xenon weathering (Figure 4a) and thermal ageing at 150°C (Figure 4b). ADK STAB LA-402, a synergistic HALS blend based on low molecular weight HALS, shows equivalent surface protection to ADK STAB LA-502 but the latter displays much better gloss retention after oven ageing Source: Adeka Polymer Additives
44 COMPOUNDING WORLD | September 2018
www.compoundingworld.com
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