Montpellier School of Chemistry
Claire Negrell, Montpellier School of Chemistry, France, tested bio-sourced phosphorus flame retardants in polyamide PA11 produced from castor oil (Rilsan®).DOPO grafted onto a bio-based di-acid (itaconic acid) was polymerised into the polyamide monomer at up to 1% phosphorus loading to obtain a polyamide achieving UL94-V0 and self-extinguishing.