zinc borate 1.Appearance:white powder 2.Cas no.;1332-07-6 3.Molecular weight: 434.62 4.competitive price and high quality
Zinc borate 3.5H2O
Introduction:
Zinc borate is primarily usedas a flame retardant in plastics and cellulose fibers, paper, rubbers and textiles. It is also used in paints, adhesives, and pigments. As a flame retardant, it can replace antimony trioxide as a synergist in both halogen-based and halogen-free systems.It is an anti-dripping and char-promoting agent, and suppresses the afterglow. In electrical insulator plastics it suppresses arcing and tracking.
In halogen-containing systems, zinc borate is used together with antimony trioxide and alumina trihydrate. It catalyzes formation of char and creates a protective layer of glass. Zinc catalyzes the release of halogens by forming zinc halides and zinc oxyhalides.
Specification:
| No. | ITEM | Index |
| 1 | Zinc Borate % | 99 min |
| 2 | Apperance | White crystal powder |
| 3 | Boron Oxygenation (B2O3) % | 48.5±1.5 |
| 4 | Zinc Oxygenation (ZnO) % | 37±1.5 |
| 5 | Surface Moisture (H2O) % | ≤1 |
| 6 | specific gravity g/cm3 | 2.67 |
| 7 | Residues on 325 mesh % | ≤0.2 |
| 8 | Temp of loss crystal water °C | 350±50 |
| 9 | LOI | 13.5±0.5 |
| 10 | Refractive index | 1.58 |
| 11 | Melting point °C | 980 |
| 12 | Pb % | 0.02 max |
| 13 | Fe % | 0.05 max |
| 14 | As % | 0.02 max |
| 15 | Packing | Inner plastic film with PP woven bags outside |
| 16 | Net weight | 25 kg/ Bag |
| 17 | Loading Quantity | 18-20MT / 20'FCL |
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