... of crystal water, oC >320Refractive index1.58Application:1. Zinc borate as antimony oxide or other halogen flame retardant additives ... such as flame retardant partial or complete environmental alternatives, zinc borate is being widely applied directly in plastic and ... processing, such as PVC, PE, PP, enhance polyamide, polyvinyl chloride (PVC) fat, polystyrene polyester, epoxy resin, acid and ethylene ...