ADDITIVES | IMPACT MODIFIERS
Right: Typical applications for Milliken’s new NX UltraClear MaxImpact include PP parts requiring clarity and low temperature performance
non-core polymer businesses (it finalised the sale of its Santoprene TPV business to Celanese in December). Exxelor grades are chemically modified polyolefin and elastomer-based polymeric performance enhancers for various types of thermoplastics. They can be used as impact modifiers as well as compatibilisers, coupling agents and adhesion promoters. The Compound Company says the Exxelor products complement its existing range of functionalised and grafted polyolefin-based solutions, which include its Yparex extrudable adhesive resins and the Eco- Forte compound portfolio, and expects the acquisition to significantly expand the group’s reach into new markets. “While Exxelor has traditionally been targeting
different application areas than Yparex or EcoForte, it will benefit from the sales support by our experienced commercial team,” says Wouter van den Berg, Commercial Director at the company. While Yparex has traditionally been strong in
building, construction and packaging applications, Exxelor is a well-established compounding additive brand, he says. Grades such as VA1801, VA1803 and VA184 are well-known for PA impact modification, for example. The Compound Company will continue to
operate both production sites (one for Yparex, one for Exxelor) after the deal closes. As the case of Exxelor demonstrates, the supplier base for functional additives continues to change. In recent years, some major names have divested themselves of such product lines, while others have announced grade rationalisations. SACO AEI Polymers is building its presence in the sector. “With deep roots in reactive extrusion and in the safe handling of the chemicals involved, SACO AEI Polymers delivers a variety of grafted
and compounded solutions, including maleic anhydride functional additives under the Armidan and Linxidan trademarks,” the company says. The SACO AEI Polymers brand dates to 2016 but the company’s compounding history extends back to 1998 and the formation of Padanplast USA, initially a joint venture with Italy’s Padana- plast. Padanaplast USA bought the compounding assets of Eaton Corp in 2007. It changed its name to SACO Polymers in 2010, then to SACO AEI Polymers following its acquisition of UK-based AEI Compounds. PA compounds are well known for their good mechanical properties and easy processability, but sometimes impact properties at ambient and low temperatures let them down. For applications where impact performance is very important, SACO AEI Polymers says grafted maleic anhydride (MAH) polymers are an effective solution.
Above: Exxelor functional polymer resins expand The Compound Company’s functionalised polyolefin-based product portfolio
44 COMPOUNDING WORLD | April 2022
Grafting solutions Armidan is a family of impact modifiers for PA (and also PBT), produced by grafting MAH onto a variety of polyolefinic, elastomeric, or rubber-based resins. Danielle Sherman, Commercial and Product Manager – Custom Solutions at SACO AEI, says the portfolio has been designed to provide a wide range of impact and mechanical property improve- ments across a broad temperature range. One example is Armidan NT7410. Formulated for use with PA66, it has high melt flow (39g/10 min) as well as a high concentration of maleic anhydride to achieve good dispersion and mor- phological properties. A low glass transition temperature ensures it will achieve good impact properties down to -40°C. The company says the additive is easy to process and, depending upon the desired performance target, can be used at loading levels from 8-25%. Turkish technical compounder Tisan Engineer- ing Plastics offers MAH-grafted polymers under the Olebond brand. The company says grafting is achieved by reactive extrusion and makes it
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IMAGE: THE COMPOUND COMPANY
IMAGE: MILLIKEN
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