COMPATIBILISERS | ADDITIVES
end-use applications. “For example, the use of the CirKular+ ReNew series in TPE-S compounding can help incorporate ISCC PLUS certified renewable content and reduce the carbon footprint of the compound formulations,” he says. “The mass balance approach supports ease of adoption with the ReNew series matching product specifications of equivalent conventional Kraton grades, enabling similar performance in an established end custom- er formulation. This approach can help our com- pounding customers cut the new product develop- ment cycle and increase differentiation with high-performance renewable-based alternatives.” German speciality chemicals maker Brüggemann
recently acquired Italian company Auserpolimeri, a manufacturer of functionalised polymers, to expand its market presence in high-performance polymer additives including compatibilisers and coupling agents, in close cooperation with the Eigenmann & Veronelli Group. “Auserpolimeri’s chemically functionalised polyolefin-based polymers play a key role as impact modifiers, compatibilisers, coupling agents and adhesion promoters in improving the perfor- mance levels of engineering plastics for a wide range of applications,” says Dr Klaus Bergmann, Head of Polymer Additives at Brüggemann. “They ideally complement and complete our existing range of high-performance additives.” According to BYK, changing environmental
regulations are a continuous driver for new compatibilisation products. “The 13th Adaptation to Technical Progress (ATP) to the Classification, Label and Packaging of Substances and Mixtures (CLP) Regulations was published by the European Union at the end of 2018,” says Jörg Garlinsky, Head of Global End Use Thermoplastics – Industrial Applications. “Compounders and processors of thermoplastic materials are now impacted by changes in the
product classification for maleic anhydride (MAH). Products containing a free residual MAH content of as low as 10 ppm (0.001%) now need to be classified as skin sensitising,” he says. “MAH is the most frequently used functional group of grafted polyolefin polymers. A vast majority of these products are used as coupling agents for fibre- reinforced thermoplastic materials, such as wood-plastic composites or glass-fibre reinforced polyolefins. What is needed is a label-free alterna- tive and BYK has developed such a product, Scona TSPP 8219 GA, using alternative monomers.” BYK has developed a number of compatibilisers and coupling agents for both virgin and recycled polymers. For virgin polymers, the company says that the Scona TPPL product range offers tailor- made polylactic acid (PLA)-based polymer modi- fiers for PLA-based materials. Typical areas of application include viscosity modification with Scona TPPL 1310 PA and Scona TPPL 1214 PA, provision of compatibility in PLA with Scona TPPL 1112 PA, and blend fibre matrix bonding using Scona TPPL 5112 PA.
In the automotive industry in particular, plastic components have now replaced many traditional materials but, in Europe at least, car makers are obliged to manufacture an increasing proportion of these plastics from recycled materials. Bumpers are a typical example. The PP used is modified with EPDM for impact strength and fillers are added to achieve the desired price and strength level. BYK says that its products can neutralise the
negative effect of impurities and increase impact strength. The company says as little as 0.2% paint residue in recyclate causes a significant drop in impact strength during ageing. After around 1,500 hours, an impact strength of approximately 15% of the original value can be measured. Its Recyclobyk 4373 compatibilises the paint impurities and restabilises the material so that after 1,500 hours,
Dow claims first with Recyclass approval
Last month Dow’s RecycleReady compatibiliser technology secured Recyclability Approval for use in the European flexible PE packaging stream under the RecyClass evalua- tion scheme, which the company claims is a first in this sector. RecycleReady is a PE coextruded film containing an EVOH barrier layer and Dow’s Retain 3000 compatibiliser, which is said to both compatibilise the
www.compoundingworld.com
recycled blend and to counter yellow- ing effects linked to EVOH degradation. The Dow technology was evaluated by the Spanish plastics technical institute Aimplas in accordance with the RecyClass Recyclability Evaluation protocols. The Aimplas results show the technology is fully compatible with both natural and coloured flexible PE recycling technologies when the
amount of EVOH does not exceed 4.75% and the amount of compatibi- liser limited to 2.25%. According to RecyClass, further assessment showed that recycled material containing up to 25% of film with RecycleReady technology can be used in high-quality applications such as PE blown films. �
www.dow.com �
www.recyclass.eu
May 2023 | COMPOUNDING WORLD 43
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64
