Overview
Fumed silica is hydrolyzed under high temperature in the oxy-hydrogen flame from the Chlorosilane. It is a type of white, non-toxic,odourless and amorphous inorganic fine chemistry products.
Package and storage
10kg per bag nei weight.
Stored in the dry,shady and cool place.
Application
- Strengthening-fillers in the silastic system(HTV,RTV).
- Used in the adhesive and sealant system for controling the flowing property.
- Anti-deposit property,anti-flowing property and anti-thixoteopic in the coatings,oil ink system.
- Electeonic products,paper,medicine,cosmetic,toothpaste,plastic applications.
- Proper rheology for the process.
- Thickening for polar liquid,e.g.epoxy resin.
- Reinforcement for organnosilicon elastomer.
- High addition,e.g.molded produncts.
- Excellent hydrophobicty to enhance anti-corrosion property.
- Improvement of dielectric property,e.g.cable compounds.
- Flow agent for powder,e.g.fire extinguishing
The main chemical index
| Items | Hydrophilic Fumed Silica | Hydrophobic Fumed Silica | |||
| HS971 | HS973 | HS975 | HS972 | HS974 | |
| Specific surface (m2/g) |
150±15 | 200±20 | 380±30 | 115±15 | 170±20 |
| PH(4%) （water:ethanol1:1) |
3.7-4.5 | 3.7-4.5 | 3.7-4.5 | 5.0-8.0 | 5.5-8.0 |
| Loss on drying (105℃,2h,w%) |
≤1.5 | ≤2.0 | ≤2.5 | ≤0.5 | ≤0.5 |
| Loss on cauterization (1000℃,2h,w%) |
≤2.5 | ≤2.5 | ≤2.5 | ≤2.5 | ≤4.0 |
| SiO2 content,% | ≥99 | ≥99 | ≥99 | ≥99.8 | ≥99.8 |
| Surface density | 40-60 | 40-60 | 40-60 | 45 | 45 |
| Carbon content,% | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 |
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