Fumed Silica Felcosil-EC R272 in Printing Inks

Fumed Silica Felcosil-EC R272 in Printing Inks

Felcosil-EC R272 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichlorosilane).

Item NO.:
Felcosil-EC R272
EINECS No:
238-878-4
CAS No.:
10279-57-9
Chemical Formula:
SiO2

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Felcosil-EC R272 Hydrophobic Fumed Silica for Printing Inks

Physical Properties

Felcosil EC-R272 is a hydrophobic fumed silica with a BET surface area of 90–130 m²/g. This high-purity white powder provides excellent rheology control, thickening, anti-settling, and anti-sagging performance in inks, coatings, adhesives, sealants, and silicone systems.

Properties

Excellent thickening and thixotropic performance
Effective rheology control in adhesives and sealants
Improves anti-settling and anti-sagging properties in coatings and inks
Reinforcement for RTV and HTV silicone rubber systems
Enhances powder flowability and anti-caking performance

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

Package and storage

Package:10kg/PE bag
Storage: Kept in a low temperature, dry and ventilated place, avoid direct sunlight.
Shelf life: One year in ventilating, cool and dry area.

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