MATERIALS | PLASTICISERS
mental impact when formulating PVC products as the choice of plasticiser depends on the specific requirements of the application. Factors such as flexibility, temperature resistance, chemical resist- ance and regulatory compliance play a significant role in selection. Migration characteristics are of particular
Figure 2: Impact on extraction resistance when replacing DOA with a blend of DOA and Edenol 2178 or 2192 Source: Emery Oleochemicals
goods more efficiently than using conventional plasticisers, while reducing energy, scrap, and material usage. Japanese additives specialist Adeka launched its
ADK Cylcloaid bio-based plasticisers as environ- mentally friendly alternatives to fossil-based materials. The company says its ADK Cyclcoaid PNB series formulation for PVC uses 90% or more biomass raw materials yet exhibits equal or better performance compared to general-purpose plasticisers based on phthalates or dibasic esters in terms of oil resistance (resistance to oil extraction), heat aging stability and migration. ADK Cyclcoaid PNB received “Biomass Mark” labeling and certifica- tion from the Japan Organics Recycling Association. Adeka also offers its ADK Cizer C series of linear
or branched trimellitate plasticisers for PVC applications where high heat resistance, flexibility at low temperature and low volatility are required, while it says its ADK Cizer PN series of polymeric plasticisers for PVC offer very good oil resistance, anti-migration performance and ex- tremely low volatility. As the industry transitions
toward sustainable additives, the aim is to strike a balance between green goals and the performance of PVC products, according to Emery Oleochemicals. Manufacturers need to consider intended use, end-user safety and environ-
Right: Emery’s Edenol 9789 polymeric
plasticiser offers the low volatility and durability required for cast films for the automotive industry
32 FILM & SHEET EXTRUSION | September 2023 L E O
www.filmandsheet.com
importance in food packaging applications. EU Directive 10/2011 sets migration limits for sub- stances approved for indirect food contact. Emery Oleochemicals says it has developed a portfolio of plasticisers with exceptionally low migration characteristics and adds that these are in compli- ance with Directive 10/2011. To meet the demand- ing requirements of this industry, it offers a full line of polymeric plasticisers over a viscosity range from 700 to 13,000 mPa*s (20°C) that have very low migration properties.
Emery Oleochemicals has developed several plasticisers for technical PVC applications. For roof membranes it offers Edenol 1233 Spezial, a polymeric plasticiser based on adipic acid that has a high viscosity and offers good resistance to extraction by oils, fats, grease, aliphatic hydrocar- bons, and aqueous systems. Meanwhile, its Edenol 9789 polymeric plasticiser, which is based on azelaic acid, is said to offer low volatility and high temperature and weather resistance, making it suitable for use in cast films for the automotive industry. Last year, Emery Oleochemicals announced the development of two 100% bio-based plasticisers — Edenol 2178 and 2192 — that can partially replace the monomeric plasticiser DOA. Shore hardness is said to be marginally compromised while extraction resistance is noticeably improved (Figure 2). The two plasticisers are said to show very good perfor- mance in both PVC and in bioplastic resins. They can be used as single plasticisers, in combination with each other, or in conjunction with other plasticisers. Both are biode- gradable.
Mass-balance approach Germany’s BASF has been using a biomass-balanced (BMB) approach for its Hexamoll DINCH BMB, Palatinol N BMB, Palatinol 10-P BMB and Plastomoll DOA BMB plasticisers since 2020. Further supporting its circular goals, the company recently expanded its BMB
portfolio with Plastomoll DNA and the
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