How to Fight the High Price of Antimony Trioxide

Are there substitutes for Antimony Trioxide (AO) in PVC and other halogen-containing plastics? The uniqueness of AO is its ability to react to form powerful volatile flame inhibitory antimony trichloride or tribromide. So, if the formulation contains considerable flammable volatile material like typical PVC plasticizers, it is hard to totally dispense with AO. Zinc stannates …