PVC | STABILISERS/LUBRICANTS
Right: Markets such as flooring are demanding an overall reduction in emissions
tional products, Reagens offers systems that meet with low odour/low phenol and low emission criteria. “In harmony with these concepts, all the products in Reagens’ portfolio are characterised by the absence of chemicals that can be subjected to restriction by REACH regulations, like CMRcatego- ry 1 and 2, PBT and ED and other undesirable chemicals,” he says. Explaining that REACH is driving the European chemical industry to develop safer solutions, Allieri highlights the SVHC list based on hazard classifica- tion. A supplier of any product on the list needs to communicate the presence of that product along the supply chain if it is used at levels above 0.1 wt.%. “This is triggering the development of new chemis- tries, and Reagens has developed a new generation of LMMs that are not only REACH-friendly today, but also REACH-friendly long term: the new liquid Reagens 600 & 900 Series that include products free from any S-VHC or potential S-VHC substances.” Allieri says Reagens has developed a process
that enables it to manufacture organophosphate intermediates free from any phenol contamination. This makes it possible to formulate LMM stabilisers (barium/zinc or calcium/zinc) that are said to have zero phenol. “Reagens 600 & 900 Series stabilisers are giving a significant contribution to reduce emission problems from the final articles, particu- larly for indoor applications that have to meet more stringent regulatory and technical demands — floor- ing, wall covering, etc,” he says. In a number of applications, typically for indoor
uses, technical requests are driving recipes towards a significant reduction in emissions from the final article, Allieri explains. “More and more, the answer to these requests is in the selection of a solid COS [Calcium Organic Stabiliser],” he says. “Reagens’ Reapak range of solid COS stabilisers includes several grades in powder form, some of them available also in granules or in pastilles, to fulfil all technical requirements. The use of solid stabilisers is now increasingly possible also in plastisol opera- tions, because of the appropriate composition and
the physical form of the powder — micronised — that allows an easy dispersion into the plastisols.”
Enhancing value At Galata Chemicals, Vice President Peter Frenkel says that, in an effort to enhance the cost-in-use value of its additive offerings, the company has developed, patented and commercialised a new range of high efficiency solid and liquid stabilisers. These are designed specifically to be used in compounds plasticised with its Drapex Alpha 200 and Drapex Alpha 215 bio-based plasticisers. He says efficiency of the new stabilisers exceeds the most demanding requirements. Required loadings of solid Mark 3600, Mark 3601 and Mark 3602 — intended for use in general purpose, tarpaulin and cable PVC compounds respectively and all plasticised with Drapex Alpha 200 — were 60-80% lower than those needed for conventional Ca/Zn stabilisers in compounds plasticised with conventional plasticisers, he says. “These heat stabilisers imparted excellent transpar- ency and extended long-term heat stability as well as improved overall dynamic heat stabilising performance of the plasticised compounds.” Similarly, stabiliser loadings could be reduced by 50-60% when using the new liquid Mark 3610 and Mark 3611 in combination with Drapex Alpha 200. Frenkel says the new stabilisers considerably
Figure 1: Chip chart showing how a combination of Galata Chemicals’ Mark 3600 solid stabiliser and Drapex Alpha 200 plasticiser imparts superior long-term heat stability to a PVC compound than a combination of a Ca/Zn stabiliser and DOTP at 200°C
20 COMPOUNDING WORLD | June 2020
www.compoundingworld.com
SOURCE: GALATA CHEMICAL
IMAGE: SHUTTERSTOCK
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