... ≤ (%)1.0PROPERTIES:Zinc Borate is one environmental-friendly halogen-free flame retardant. There are some formulations of XZnO.YB2O3 ... , good thermal stability, fine particle size, low specific gravity, great free-flowing etc. As one high efficient flame retardant ... retardants to significantly improve the flame retardant performance, remove smoke emission and adjust the balance on chemical, mechanical, ...