ADDITIVES | IMPACT MODIFIERS
Right: This bottle and extruded plank section are produced in recycled materials containing Dow additives to improve performance
organised by Compounding World publisher AMI. At the Medical Tubing 2018 event in Cologne in June this year, Kraton and rival SBC supplier Kuraray explained how their copolymers have been tailored for these extremely demanding applica- tions. And at last year’s Medical Tubing event, LyondellBasell unveiled its Purell KT MR 07, which it says is the first polybutene-1 (PB-1)-based resin targeted at healthcare applications such as medical tubing and IV bags.
Plastomer potential Purell KT MR 07 is a high molecular weight isotactic semi-crystalline polyolefin (a plastomer), produced using metallocene catalyst technology. It is highly compatible with polypropylene, making it easy to create blends, and is said to enhance not only flexibility, elasticity and softness, but also transpar- ency and impact resistance, even at sub-zero temperatures. Ankur Rastogi, who works in application devel- opment and technical service for PB-1 specialties, said Purell KT MR 07 also stands out with its low leachability and extractability, excellent resistance to kinking, sterilisability, and weldability. It can also be used to enhance impact resistance. At AMI’s Plastics Recycling World Exhibition in
Essen in June,Dow Packaging & Specialty Plastics showcased what it says is one of the broadest offerings for polymer recycling, as well as solutions for recyclable packaging. This offering now comprises portfolios of DuPont as well as Dow and includes Dow’s Engage, Intune, Infuse, and Retain brands as well as DuPont’s Elvaloy, Entira, Fusabond and Surlyn.
Recycling ideas Dow says its portfolio for mechanical recycling comprises a range of modifiers and compatibilisers for improved mechanical performance when recycling post-industrial and post-consumer flexible packaging waste. “With the combined range we can help manage diverse streams for a huge variety of polymers, including polyethylene, polypropylene, thermoplastic polyesters, polyam- ide, and EVOH, and up-cycling opportunities for recyclers and brand owners,” says Dr Olaf Hensch- ke, Product Technology Leader, Dow Packaging & Specialty Plastics.
“High performance impact modifiers from both companies have been successful across a broad thermoplastic compound range for many applica- tions in transportation, infrastructure and consumer products. They are now finding new application spaces in recycling, with increasing demand for
68 COMPOUNDING WORLD | July 2018
compounds from recycled polyolefins or polyesters with performance targets similar to virgin materials, again for many application fields,” he says. Dow claims one of the broadest ranges of impact modifiers for recycled and virgin polymers. Products highlighted include: Engage and Versify polyolefin elastomers and plastomers for PP and Elvaloy 1224 and 1330 AC acrylate co- and terpolymers for ABS to improve flow, increase impact resistance and raise stress crack resistance; Elvaloy PTW ethylene terpolymer and Elvaloy AC acrylate copolymer combined for PET and PBT to provide a balanced performance of low tempera- ture impact resistance and flow; and Fusabond functional polymers and Surlyn ionomers for polyamide impact performance. The combination of metallocene base polymers and MAH functionality in Fusabond grades provides superior low temperature impact strength for polyamides, Dow says, while Surlyn ethylene copolymer ionomer resins combine low-temperature impact strength with enhanced surface quality. A recent addition to the Surlyn range is AD1032; this makes it possible to create almost transparent PA6-based compounds with processing perfor- mance and properties very similar to long-chain polyamides, the supplier says.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.cvc.emeraldmaterials.com �
www.brueggemann.com �
www.kraton.com �
www.lyondellbasell.com �
www.dow.com/packaging/sustainability
www.compoundingworld.com
PHOTO: DOW
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