MATERIALS | PVC PLASTICISERS
in contact with concrete,” he says. Adeka points to its range of specialty plasticis-
ers, of which it has no fewer than four. ADK Cizer C Series grades are linear and branched trimellitates, the ADK Cizer PN series comprises polymeric plasticisers, and the ADK Cizer RS series is intend- ed for rubber. The company also produces epoxidized soya bean oils. The Cizer C series trimellitates are said to
Figure 1: VersaMax Plus effectiveness measured by hardness compared to DEHP, DINP, DINCH and DEHT Source: Eastman
customers has been extremely positive, particularly when the product is used in combination with Elatur CH (cyclohexanoate), and demand for the next few months is satisfyingly high,” Evonik says.
Right: Trimellitate plasticisers such as Adeka’s ADK Cizer C series are finding application in wire and cable markets
Universal option At Lanxess, Dr Thomas Facklam, Head of Applica- tion Technology, Polymer Additives, says the use of its Mesamoll as a universal non-phthalate plasti- ciser is well-known. “In view of its good gelling capacity with PVC, indicated by a low dissolution temperature of 120°C, Mesamoll can be used as a special plasticiser and is able to support technically in filling the gap left by the low molecular weight phthalates. The use of Mesamoll as a supplement for other plasticisers in compounds containing poor gelling plasticisers has proved highly success- ful,” he says. “One of the manifold uses of plasticised PVC is its use as a thixotropic agent for polyurethane compounds. In one-component PUR sealants, the plasticiser and the PVC influence the rheology and the mechanical properties. Demand also exists in this application for fundamentally high-perfor- mance and additionally phthalate-free solutions,” Facklam says. “It has been proven that Mesamoll, which is highly compatible with both PVC and the polyurethane used, is a very good alternative in 1K polyurethane applications. The remarkable resistance to saponification by chemicals or extreme weather conditions allows the development of products for demanding in and outdoor application like joint sealants
18 COMPOUNDING WORLD | August 2019
provide superior heat aging resistance, low volatility, electrical insulation and oil resistance, making them especially suitable for wire and cable applications, films, sheets and automotive uphol- steries. Polymeric PN series plasticisers offer low migration into other plastics and high resistance to oil extraction. “High viscosity polyadipates grades also demonstrate excellent oil resistance and are suitable for fuel hose uses and high-end applica- tions in PVC and also rubbers,” the company says.
Specialty developments Grupa Azoty is also active in specialty plasticisers. The recent introduction of products under the Adoflex and Oxovilen banners are said to be the next step of the development of the OXO Segment at the company, and are based on its assembly of a range of non-phthalate specialty products. Previ- ously, the company developed and started production of the first Polish-manufactured non-phthalate plasticiser, Oxoviflex. Capacity for that has increased in the last few months “thanks to which a leading position was reached in the group of European manufacturers,” the company claims. The Adoflex and Oxovilen products are manu-
factured in a new multifunctional 10,000 tonnes/yr plant at Kędzierzyn-Koźle in Poland. Adoflex is a bis(2-ethylhexyl) adipate with very good plasticising properties and is recommended for the production of food-contact materials (films in particular), due in part to its good toxicological profile. It maintains its properties at low temperatures. Adoflex can also used in the production of garden hoses, cables and coated fabrics. Depend- ing on the application, it can be used as a main or functional plasticiser along with Oxoviflex. Oxovilen is a di(n-butyl)
terephthalate, which is characterised by fast poly- merisation and low migration and gives greater flexibility to finished products. It is used, among other things, in the
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production of PVC liners as a functional plasticiser with Oxoviflex.
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