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Two phr loading windows for epoxidized soybean oil (ESBO) in flexible PVC, co-stabilizer versus secondary plasticizer
How to Formulate PVC with Epoxidized Soybean Oil (ESBO)

The right ESBO dose is really two doses. Run epoxidized soybean oil (ESBO) at 1 to 4 phr and it works mostly as a co-stabilizer, propping up your Ca/Zn system. Push it toward and past 5 phr and it starts carrying real plasticizing load — along with real exudation risk. This procedure assumes you already…

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