MATERIALS | COMPATIBILISERS
ened regulations for free MAH in end-products is a driver for those developments as well as sustain- able materials.” The Compounding Company has lined up a
portfolio for a wide variety of mixtures of thermo- plastic materials for mechanical recycling, Huijnen says. “Yparex, as part of The Compound Company, always has shown its capability to develop a range of MAH-modified polyolefins for thermoplastic processing. Since mechanical recycling has gained volume, Yparex has adapted to the needs to have compatibilisers which enable plastic processors to generate new value from their plastic waste streams. “With these compatibilisers we can cover
recycling streams for injection moulding, but also for the more critical film processing.” Yparex compatibilisers are used in industrial waste stream recycling and also in PCR. Polyscope, whose core business is based on
styrene-maleic anhydride, says it has grown its market share in SMA-based products significantly over the past decade. The company’s search for a new owner that could support future growth ambitions ended in January when it was acquired by Vertellus. “With this acquisition, Polyscope has expanded
its reach within the specialty additives market,” says Patrick Muezers, Polyscope CEO. “We increasingly see opportunities to offer solutions for the upcy- cling of various polymers. Some of our customers have even found that our compatibilisers can contribute to making blends from plastic soup in combination with ABS, enabling PET/ABS blends that can be used in applications such as in housings for electrical appliances.” Olebond products from Tisan Engineering
Plastics in Turkey are maleic anhydride grafted polymers produced (as are several others de- scribed here) by reactive extrusion. “According to grafting level and polymer type, Olebond help to improve compound performance by acting as compatibiliser, coupling agent, impact modifier and adhesive agent,” says the company. Olebond 7401 grades based on PP and with high maleic content are used in PP compounds as a coupling agent between polymer and fillers. “At the same time, Olebond 7401 helps to form blends with high mechanical values with PP and immisci- ble polymers such as PA,” says Tisan. Olebond 7402 grades improve the interphase adhesion of polyethylene to other polymers such as polyamides and polyolefins. It also promotes adhesion between metal, polyolefins, cellulose, glass and foil.
Other Olebond grades are ABS and EVA based 34 PLASTICS RECYCLING WORLD | May/June 2022
Example of performance improvement through use of compatibiliser Source: Sukano
products that can be used as compatibilisers in different products. Olebond 7404 is an MA grafted ABS and Olebond 7405 is MA grafted ethylene vinyl acetate (EVA). SK Functional Polymer (SKFP) offers a full range
of compatibilisers and recycling boosters that it says can be used to convert mixed plastic waste streams into high value materials. Lolita Hauguel, Business Development Manager, says: “SKFP has focused significant research efforts on developing reactive polyolefins to compatibilise plastic blends by mechanical recycling. Lotaderreactive terpoly- mers and Orevac grafted resins are widely used as compatibilisers of a wide range of blends. SKFP has solutions for recycled blends such as rPET/rPE, rPET/rPP, rPA/rPE, rPA/rPP, rPA/rPET... but also PE/ EVOH blends.” Lotader 4210 maleated grade has been com-
mercialised to upcycle polyethylene and EVOH multilayer wastes, even if the final compound is limited to non-food applications. SKFP says another successful example is the use of Lotader AX for recycled PET contaminated with polyolefins not eliminated by the sorting process or introduced intentionally in order to develop blends with improved properties. SKFP has also demonstrated that its new range
of highly heterogeneous Lotryl T acrylate copoly- mers are efficient booster solutions for styrenics recycled resins. The use of these Lotryl T copoly- mers enables a significant increase in the impact performance of rABS. SKFP also provides solutions to improve the impact resistance and at the same time adjust the viscosity of the rABS compounds by combining non-reactive Lotryl highly polar copoly- mers and reactive Lotader AX. “The combination of
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