ADDITIVES | RECYCLING
Right: SEM images of HDPE/PP blends, one with no compatibiliser (top) and the other using ImerLink, which bonds with both phases to create a more homogeneous structure
The CirKular+ Compatibilisation Series can be used for various normally incompatible mixes, such as PP/PA, PO/PET, PA/PET, and others. Kraton says that as little as 3-5% of CirKular+ additives results in up to 500% improved mechanical performance of PCR and PIR in compositions containing more than 70% recycled resin, as well as improved durability with minimal loss in stiffness. It says that the additives deliver superior performance even after five reprocessing cycles.
Grafted compatibilisers Denmark’s Nordic Grafting Company (NGC) was founded almost five years ago as a wholly-owned affiliate of Bjørn Thorsen. It has a global license agreement with ExxonMobil allowing it to utilise certain ExxonMobil patented technologies in grafting of ExxonMobil Vistamaxx performance polymers to make its Acti-Tech compatibilisers.
Effect of addition of SEBS to a mix of polar PS and non-polar HDPE
ExxonMobil describes the Vistamaxx materials as semi-crystalline copolymers with tunable amorphous content. NGC markets its Acti-Tech products as compatibilisers for polar/nonpolar polymer alloys, WPCs and natural fibre com- pounds, as well as a toughener in recycled plastics and for other related applications. The Acti-Tech products feature a high grafted monomer content, a low maleic acid content, an MFI adjusted for optimal dispersion, and high flexibility. “Acti-Tech compatibilisers have shown improved dispersion and decreased domain size of polyole- fin particles in a polyester matrix,” says the com- pany. “Moreover, it demonstrates increased impact strength even at low temperatures compared to non-compatibilised mixtures.” NGC has just launched a new Acti-Tech compati- biliser approved for food contact applications in packaging and recycling industries. Acti-Tech 16MA11F is compliant with EU food regulation 10/2011. It can be added to both PE or PP-based formulations and can be tailored to the process equipment. NGC Chief Technology Officer Kevin Barthomeuf says it is “an ideal solution to upcycle mixed polymer feeds from PIR or PCR, enabling the use of these recycled plastics into existing products without lowering end-properties.”
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.basf.com �
www.crayvalley.com �
www.lbf.fraunhofer.de �
www.altana.com �
www.greenmantra.com �
www.voelpker.com �
www.4kenrich.com �
www.intermixperformancematerials.com �
www.nexamchemical.com �
www.imerys.com �
www.kraton.com �
https://ngc-nordic.com/ (Nordic Grafting Co)
Image: Kraton 72 COMPOUNDING WORLD | October 2021
www.compoundingworld.com
IMAGE: IMERYS
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