zinc borate

Zinc borate, also named Flame Retardant FB, has dozens of different varieties. The most common variety is ZB-2335, also named Firebrake ZB. Molecular formula: 2ZnO·3B203·3.5H20, molecular weight 434.68. It is non-toxic, has low water solubility, high thermal stability, small particle size, low specific weight, good dispersibility. It is a highly efficient fire retardant widely used in plastics, rubbers and coatings. Use ZB2335 not only has low smokiness and good fire resistance, but also can greatly reduce the ash of rubber products (air-duct, belt conveyer) after burning. So it is the ideal substitute of antimony trioxide. It can achieve better fire retarding effect when used together with antimony trioxide. 1. Plastics: PVC, PVC ebonite foam, phenolic aldehyde, polyester, reinforced polyamide, polyurethane, polystyrene, PP, PE, ABS, epoxy resin, polyvinyl acetate etc. 2. Rubbers: natural rubbers, Styrene Butadiene Rubber, chloroprene rubber etc. 3. Paints: non-intumescent paints and intumescent paints.