Fumed Silica EC R272 in Printing Inks
Physical Properties
EC R272 is hydrophilic fumed silica with a specific surface area of 300m2/g. It is a kind of high purity white colloidal powder.
Properties
• Used as thickening, thixotropic, reinforcement in RTV silicone rubber
• Rheology control of adhesive
• Used as anti-settling, thickening, anti-sagging agent in coatings, inks
• Improvement of free flow and anti-caking characteristics of powders
Specifications
| Properties | Target Values (Spec Limits) |
| Appearance | White Powder |
| BET specific surface area m2/g | 90-130 |
| Heating Loss at 105 °C 2h wt.% Max | 0.5 |
| Igniting Loss wt.%
(2h at 1000 °C, based on materials dried for 2h at 105 °C) Max |
2.0 |
| pH Value in 4% dispersion | 3.8-5.0 |
| SiO2 (based on ignited material) % Min | 99.8 |
| Tamped density (based on material dried for 2h at 105 °C g/L | 40-60 |
| Carbon conten (based on material dried for 2h at 105 °C wt.% Max | 0.6-1.2 |
Application
• HTV and RTV silicone rubber
• Adhesives and sealants
• Paints, coatings and pigments
• Printing inks
• Cable compounds and gels
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