Zinc Borate is widely used as a kind of environment-friendly additive halogen-free
flame retardant in various of polymers, due to the ratio of Zinc and Boron, Zinc
borate’s dehydration temperature is great different so as to suitable for different
applications in PVC, Polyolefins, polyurethanes, thermoset resins, thermoplastic,
elastomers and rubbers.
link:https://www.senloschemical.com/flame-retardant/zinc-borate.html