News

Bio-based plasticizer for PVC

A great success for CETMA that, on behalf of kommi Sas of Lequile (LE), in collaboration with the University of Salento - Department of Engineering materials, Serichim Srl of Torviscosa (Ud) and European Plastics Converter of Brussels, has developed a bio-based plasticizer for soft PVC.

About 70% of plasticizers for PVC in the market are made of phthalates, synthetic esters of phthalic acid, among which the most used is DEHP (Di-2-ethylhexyl phthalate).

Some of them, because of the reproductive toxicity and the effects of disruption of the endocrine system, in addition to being persistent in the environment, have already been the subject of specific employment regulations from the European Union . Recently introduced the proposed restrictions on use for phthalates DEHP, BBP (benzyl butyl phthalate), DBP (dibutyl phthalate), DIPB (Diisobutyl phthalate), already identified as SVHC (substances of very high concern) by ECHA . This proposal is intended to ban the placing on the market of some articles in which the proportion of these phthalates exceed a certain amount in the product.

In the legislative context described above that fits the development of the new plasticizer bio based, obtained from cardanol , a shell nut oil contained in the product and the processing of walnut gap for the food industry, therefore, not intended for food use.

In addiction the new plasticizer is part of the pursuit of sustainable economic development, employing a resource from renewable sources and no petrochemical and thus improving the net emission of carbon dioxide into the atmosphere.

the activities of the partnership have been the development of the synthetic process of the bio-based plasticizer, its characterization in the laboratory scale, the development of the process in industrial scale for the production of gaskets for frames as well as their characterization through physical-mechanical tests.

the excellent results obtained have shown that the use of the plasticizer cardanol based for soft PVC guarantees the same physical-mechanical performance of phthalates traditionally used and obtained from fossil resources, but with lower rates of migration of the article in which it is present, to the outside environment. This performance, together with the least amount required to obtain the sameperformance, increases the safety limits than conventional phthalates during the useful life of the product.


For further information, reference:

Antonella Tarzia
email: antonella.tarzia@cetma.it
tel. +39 0831 449423