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Alumina Trihydrate (ATH or hydrated alumina) is a non-toxic, non-corrosive, flame retardant and smoke suppressant utilized in elastomeric applications. It is the most frequently used flame retardant in the world. ATH is a very effective flame retardant due to its thermodynamic properties which absorb heat and release water vapor.
Alumina trihydrate releases its 35% water of crystallization as water vapor when heated above 205°C. The resulting endothermic reaction cools the product below flash point, reducing the risk of fire and acts as a vapor barrier to prevent oxygen from reaching the flame. Typical loadings vary from 20 phr to 150 phr.
Because many polymers like polyethylene and polypropylene process above 200°C, these polyolefins should use magnesium hydroxide as a flame retardant filler since its water of hydration releases at approximately 325°C.
| PRODUCT IDENTIFICATION | ||
| CAS NO. | : | 7784-18-1, 15098-87-0 (Trihydrate) |
| EINECS NO. | : | 232-051-1 |
| FORMULA | : | AlF2 |
| MOL WT. | : | 83.98 |
| H.S. CODE | : | 2826.12 |
| SYNONYMS | : | Aluminum Trifluoride Trihydrate; Aluminiumfluorid (German); Fluoruro de aluminio (Spanish); Fluorure d’aluminium (French) |
| DERIVATION | : | Alumina Trihydrated And Hydrofluoric Acid |
| PHYSICAL AND CHEMICAL PROPERTIES | ||
| PHYSICAL STATE | : | White crystalline powder, odorless |
| MELTING POINT | : | 1291 C |
| SOLUBILITY IN WATER | : | slightly soluble |
| STABILITY | : | Stable under ordinary conditions. |
| SALES SPECIFICATION | ||
| APPEARANCE | : | White crystalline powder |
| ASSAY ( AlF3 ) | : | 96.0% min |
| SILICA ( SiO2 ) | : | 0.18% max |
| LOSS ON IGNITION | : | 1.0% max |
| ALUMINA (Al2O3) | : | 2.0% max |
| SULFATES (as SO4) | : | 0.002% max |
| PHOSPHATES (as P2O5) | : | 0.008% max |
| IRON (as Fe2O3) | : | 0.02% max |
| SIEVE ANALYSIS | : | 10% max (100 mesh), 90% min (325 mesh) |
| TRANSPORTATION | ||
| PACKING | : | 25kgs in Bag |
| HAZARD CLASS | : | Not Regulated |
Applications Aluminum Trihydrate is used in various industries as:
- A raw material in the production of aluminum chemicals.
- A raw material in the manufacture of glass and glazes.
- A raw material in catalyst production.
- A flame retardant and smoke suppressant filler in plastics (for example: Cables, rubber products and carpet backing).
- A raw material for fertilizers, and fiber cement board products.
- An extender and bodying agent in paper, solvent- and water-borne paints, UV curable coatings, inks, and adhesives.
- A polishing and cleansing agent, mould wash and separating agent.
- A filler of cast polymer products such as onyx and solid surfaces.
PHYSICAL PROPERTIES
- Powdery substance
- Odorless
- Non-carcinogenic
- Contains thermal characteristic that provides translucency and whiteness to solid surface materials.
- Non-smoking, low-toxicity, halogen-free flame retardant.
