PVC | PLASTICISERS
Science and regulatory update
This brief update on some of the latest research into plasticiser safety and snapshot of the current European regulatory position is based on information supplied by European Plasticisers, which is part of the European trade association Cefic.
Plasticiser modelling A scientific project aimed at developing a physiologically-based pharmacoki- netic (PBPK) model for plasticisers was initiated in 2017 by European Plasticis- ers and co-funded by VinylPlus, the sustainability initiative of the PVC value chain. Its objective is to assess the safe use of plasticised PVC and support scientifically-solid risk assessments, rather than those which use in-vitro studies (which the association argues are not representative of the complex metabolism in whole organisms). The project’s first PBPK model for
DINCH was published in a peer- reviewed journal in 2019. A model for DINP was published in August 2020. PBPK models for DEHTP, DPHP, DEHA, DINA and DBA are currently under development and the respective studies will be submitted for publica- tion in scientific journals.
DINP evaluation Last year also saw the publication by the University of Edinburgh in the UK of a study titled: ‘Systematic compari-
Global plasticiser consumption data covering the past 25 years shows that low molecular weight phthalates have been substantially replaced by high molecular weight ortho-phthalates and other chemistries that do not fall into the EU category of Substances of Very High Concern (SVHC) Source: CEFIC/IHS
son of the male reproductive tract in foetal and adult Wistar rats exposed to DBP and DINP in utero during the masculinisation programming win- dow.’ According to European Plasticis- ers, the study provides evidence on the clear differences between the effects occurring with DBP – a low molecular weight phthalate – and DINP, confirming the latter does not cause adverse reproductive effects and is not an endocrine disruptor.
Risk assessment European Plasticisers says an updated EU risk assessment of the phthalates DBP, BBP, DEHP, DINP and DIDP for
can now choose from Santicizer Platinum P-1400, Platinum P-1700 and now P-1800 to dial in the specific efficiency and permanence to match their end use application.” Holt says formulators also frequently combine Santicizer Platinum non-phthalate plasticisers with other general purpose non-phthalate plasticisers to create optimised solutions for their specific processing needs. “When using Santicizer Platinum P-1800 in
combination with general purpose plasticisers, manufacturers will see improved efficiency and processing speed without sacrificing emissions or migration,” he adds.
34 FILM & SHEET EXTRUSION | September 2021
use in food contact materials (FCM) — which concluded that “current exposure to these five phthalates from food is not a concern for public health” — has yet to lead to adoption in the 16th amendment to the Plastic Food Contact Material Regulation. In October 2020, EFSA published “Part 1 of a two-part mandate on a re-evalua- tion of the risks to public health related to the presence of phthalates, structurally similar substances, and replacement substances from food contact materials (FCMs)”. The outcome of this Risk Assessment is expected by end of May 2022. �
www.europeanplasticisers.eu
HMW advantage With the introduction of Jayflex L9TM, ExxonMobil has expanded its portfolio of high molecular weight plasticisers. The new addition is a trinonyl trimellitate based on linear and branched C9 alcohol. According to the company, “careful selection of the degree of linearity of nonyl alcohols to make nonyl trimellitate esters provides useful advantages in flexible PVC.” Flexible PVC materials used in demanding
applications such as automotive cables, wind turbine tray cables (WTTC), and car interior leather applications are required to meet extreme perfor- mance specifications at low and high temperatures
www.filmandsheet.com
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