Hydrophobic Fumed Silica HB-139
Specifications
| ITEM | UNIT | STANDARD | METHOD |
| Specific Surface Area(BET) | ㎡/g | 100±20 | GB/T 20020 |
| pH value in 4% dispersion （H2O：Ethanol=1:1） | – | 5.5~ 7.5 | GB/T 20020 |
| Loss on drying(2 hours at 105℃) | % | ≤1.5 | GB/T 20020 |
| Loss on ignition(2 hours at 1000℃ based on material dried for 2 hours at 105℃) | % | ≤10 | GB/T 20020 |
| Silica Content(Based on ignited material) | % | ≥99.8 | GB/T 20020 |
| Tamped Density(Based on material dried at 105℃ for 2 hours) | g/dm³ | 40~60 | GB/T 20020 |
| Carbon Content (Based on material dried at 105℃ for 2 hours) | % | 4.5～6.5 | GB/T 20020 |
Packing& Storage
| Packing | In 10KG bag. |
| Storage | Store in a cool，dry and ventilated place. Keep the container airtight. |
| Shipping | no dangerous goods |
General Information
1.1 Chemical & Physical Properties
| Common Names | Hydrophobic Fumed silica HB-139 | ||||||||
| CAS No. | 112945-52-5 | Boiling Point (℃) | 2230ºC | ||||||
| Molecular Weight | 60.0843 | Melting Point (℃) | >1600°C | ||||||
| Appearance | white powder | Flash Point | N/A | ||||||
1.2 Safety Information
| RIDADR | NONH for all modes of transport | |
| WGK Germany | 2 | |
| SYMPTOMS | PREVENTION | FIRST AID | |
| Inhalation | May cause respiratory irritation | Wear mask | Please move the patient to fresh air. If breathing stops, give artificial respiration. |
| Skin | May cause skin irritation | Wear gloves | Rinse with soap and plenty of water |
| Eyes | May cause eye irritation | Wear protective glasses | Rinse eyes with water |
| Ingestion | N/A | N/A | Do not orally feed anything to an unconscious person. Gargle with water |
Frequently Asked Questions
What is Hydrophobic Fumed silica HB-139?
HB-139 is hydrophobic fumed silica which is produced by hydrophilic fumed silica with specific surface area of 180㎡/g after chemical post-treatment with PMDS (Polydimethylsiloxane).
What is Hydrophobic Fumed silica HB-139 used for?
Silicone rubber
Coatings and printing ink
Adhesives and Sealants
Greases and cable gel
Unsaturated resin
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