... 3.5 H2O zinc borate 2335, Zinc Borate 237 Anhydrous Zinc Borate Granular Size: 3um-7 um used in PVC, ... PE, Polyolefin, Epoxy 3.5 H2O Zinc BorateSpecification: Item/Grade Zinc ... .0B2O3 , % 45.0-48.0Loss on ignition,% 13.5-15.5Fineness (Residue on 45um sieve ), % ≤ 0. ... flame retardants, Zinc borate is directly used in PVC, PE, Polyolefin, Epoxy Polyamide etc resins and rubber ...