Epoxidised Soya Bean Oil ESBO

ESBO is a heat stabiliser and secondary plasticiser used in PVC-P applications. It has food contact approval up to certain limits but there have been some environmental/political issues concerning the possible use of genetically modified soya bean oil in the manufacture of ESBO. 

The migration of ESBO from PVC-P used in gaskets for sealing baby food jars has been examined (395). 

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There always has been an interest in additives that perform both a plasticising and heat stabilising effect. The most obvious of these is epoxidised soya bean oil (ESBO), or epoxidised esters, which can be incorporated at 2-6 phr (particularly with mixed metal heat stabilisers), to improve heat stability by HC1 absorption and also give a secondary plasticisation... 

In situ generation of performic and peracetic acids has an important application in producing epoxidised soya bean oil (ESBO), a plasticiser and stabiliser. Acetic acid is often recycled. Technology for manufacture of propylene oxide [15] and of epichlorhydrin [16] using internal recycle systems for peracetic or perpropionic acids was developed, but for these products the costs have not been quite competitive with current routes, up to now. 

Aliphatic dicarboxylic acid ester plasticisers such as adipates are readily identifiable when present on their own. Significant levels of DOA (di-2-ethylhexyl adipate) can be seen in the presence of DOP and levels of 20%, 30% and 40% DOA in DOP can be distinguished one from another. ESBO (epoxidised soya bean oil) cannot be detected in DOP at the 10% level, a typical amount. 

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