PVC | PLASTICISERS
following stoichiometry meaning that there needs to be a real connection between the raw materials and the end product. So we cannot buy ‘green credits’ and apply them to other products. In Pevalen we have, in total, 25 carbon atoms. To produce Pevalen Pro 36, we change 9 ‘black’ carbons to ‘green’ carbons, which gives a renewable content of 36%. These green carbons come from biogas, bio- acetaldehyde, and bio-methanol.” She says the aim of this stricter traceability is to
Above: Perstorp says its mass balance concept is based on physical and chemical traceability
alternative to DEHP and blending it with TOTM or ATBC can provide a balance of cost-effective performance, processing, and toxicology performance, as well as maintaining or improving compatibility with PC and ABS.
Renewable solutions Swedish company Perstorp has set itself the goal of becoming “finite material neutral” and, as a result, is looking at all product lines to see if fossil-based raw materials can be shifted to renewable raw materials. “We have seen an increase in requests for biobased or bio-attributed products coming from various industry sectors like automotive and consumer goods, especially for new product lines,” says Jenny Klevås, Market Segment Manager for Polyolester Plasticisers at the company. Pevalen Pro, a PETV (pentaerythritol
tetravalerate) based partly on renewable content, is its newest non-phthalate plasticiser offering and is due to be made available to the market in the third quarter of 2020. That is a little later than originally planned — the product launch was pushed back and the audit by ISCC, an organisation that certifies that bio-based input is sustainably sourced, delayed by Covid-19 travel restrictions. With those now loosening, Klevås is hopeful the audit will soon be completed. Perstorp plans to offer Pevalen Pro in three
grades, from 8% renewable content up to almost 40% renewable content. The renewable content is assigned on the mass balance concept, which tracks the amount of renewable material going into a process and allocates it to certain products. Perstorp says it applies the principles more strictly in what they call a “traceable mass balance,” which it claims is both physically and chemically traceable. “Physical traceability means that a production
process exists within the site for producing the product from the recycled/renewable raw material(s),” says Klevås. “Chemical traceability is
46 COMPOUNDING WORLD | August 2020
create a real transformation that supports the development of recycled or renewable raw materials. The company is also is looking into sourcing alternatives that will allow it to offer Pevalen based on 100% renewable content. “The shift towards renewable raw materials needs to be done in tandem with our raw material suppliers because it all starts upstream; no company is greener than its suppliers,” says Klevås. In October 2019, DIC Corporation in Japan announced it had developed a fully plant-based, polyester plasticiser that is derived entirely from biomass resources. The company says the additive is the first plasticiser to earn the “Biomass 100%” Biomass Mark, a designation certifying that a product is made entirely with biomass under the Japan Organics Recycling Association (JORA)’s labeling system. The company has begun shipping samples and plans to scale up its capabilities to facilitate mass production. Plant-based specialities producer Roquette manufactures bio-based building blocks for plasticisers. Its Polysorb isosorbide can be used to make diester plasticisers. Its Biosuccinium biosuccinic acid can be used with alcohols to make di-(2-ethylhexyl)-succinate (DEHS) and with diols as a building block in polymeric plasticisers. DSM and Roquette ended their bio-succinic acid JV, Reverdia, in April 2019, and Roquette now operates the Biosuccinium plant in Italy, with DSM as the exclusive licensor.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.europeanplasticisers.eu �
www.echa.europa.eu �
www.epa.gov �
www.americanchemistry.com �
www.evonik.com �
www.basf.com �
www.sibur.ru �
www.roszdravnadzor.gov.ru �
www.teknorapex.com �
www.perstorp.com �
www.dic-global.com �
www.roquette.com
www.compoundingworld.com
IMAGE: PERSTORP
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