Zinc borate 3.5 hydrate (also known as ZB-2335), with a molecular weight of 434.62, is a white crystalline powder inorganic flame retardant.
Factory Price on Flame Retardant Zinc Borate (Zinc Borate 3.5 Hydrate) for Rubber and Plastic. zinc borate 3.5 hydrate is used as a flame retardant, smoke and afterglow suppressant, and anti-arcing agent in polyvinyl chloride, nylon, epoxy, polyethylene, polypropylene, polyesters, thermoplastic elastomers and rubbers. We are zinc borate 3.5 hydrate manufacturer with High Quality and Best Price in china
Physical and Chemical Properties
| Items | Unit | ZB-2335 |
| Appearance | — | White Powder |
| B2O3 | % | 47.0 ～ 49.0 |
| ZnO | % | 37.5 ～ 39.5 |
| Moisture | % | ≤0.3 |
| Loss on Ignition | % | 13.0~15.5（450℃) |
| Whiteness | % | ≥96.0 |
| Particle Size,D50 | µm | ≤7.0 |
| TGA(1%) | ℃ | ≥345 |
| Chloride(Cl- ) | % | ≤0.05 |
| Sulphate(SO42-) | % | ≤0.005 |
ordering information
Standard type: D50=5μm， Suitable for flame retardancy of conventional plastics and rubber.
Modified type: stearic acid coated (activation degree ≥ 98%), suitable for non-polar polyolefin materials.
Nano type: D50=100nm， Used for transparent coatings and flame retardant films (light transmittance ≥ 85%).
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