COMPATIBILISERS | ADDITIVES
Whether reprocessing mixed waste or creating high performance polymer alloys, compatibilisers could be the enabling
technology.Peter Mapleston finds out more
Making the mix work
Achieving acceptable performance from inherently incompatible polymers can be quite a challenge but compatibilisers can provide a solution. Some of the currently available compatibiliser technologies require the use of reactive compounding and chemical reaction to achieve the desired results; others take a more mechanical approach and rely on chain entanglements. This article takes a look at some of the latest results from both schools. Maleic anhydride finds its way into many
compatibilising polymers. Maleic anhydride-graft- ed polypropylene (MAPP), for example, has been a popular choice as a coupling agent and compatibi- liser for a long time. It is available in numerous variants from several companies, well-known names among them including Addivant with its Polybond 3000 series of modified PP resins, Clariant with its Licocene MS 641 TP polymer, Eastman with its G3003 and G-3015 PP grades, and Polyram with its Bondyram product line. Possibly less well-known is Polymer Asia, based
in Vietnam, which has partnered with Mitsui for global sales and marketing and technical support. Matthias Stücke, Deputy General Manager in the 2nd Performance Chemicals Division at Mitsui &
www.compoundingworld.com
Co Deutschland, says it is having notable success with a recently-introduced PA Bond series of coupling agents that have extremely low VOC and FOG values. “We see that this topic is quite interesting for many of our customers, especially when we´re talking about automotive applications and compounds containing natural fibres,” he says. Polymer Asia’s product line features MA levels between 1.0 and 1.2%. Stücke says that the additives feature a “super-low” free MA content and low yellowness index (illustrated in Figure 1). Polymer Asia launched the PA Bond product line
in Asia five years ago, followed by a US launch in 2015. It debuted in Europe at K 2016. “Today, PA Bond has been approved by major global PP composite producers in addition to producers of niche products,” says Stücke. Two particular grades cited by Stücke – PA-Bond
363ZV and PA-Bond 700ZV – have no residual peroxide or styrene. “That results together with the low free MA content in extremely low VOC and less unpleasant interactions of those materials in the final compounds. Customer tests have shown extremely low VOC and fog values compared to known competitors,” he says.
Main image: Reprocessing of mixed
plastic waste is just one example where compatibilisers could be used to good effect
� May 2019 | COMPOUNDING WORLD 17
PHOTO: SHUTTERSTOCK
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