Hydrophilic Fumed Silica

Felcosil EC 150/Felcosil EC 200/Felcosil EC 300 is hydrophilic fumed silica with a specific surface area of 150/200/300m²/g. It is a kind of high purity white silica powder.

Item NO.:
Hydrophilic Fumed
EINECS No:
238-878-4
CAS No.:
10279-57-9
Chemical Formula:
SiO2
Properties:
Reinforcing filler in elastomers Rheology and thixotropy control of liquid system, binder, polymer, etc. Used as anti-setting, thickening, anti-sagging agent Improvement of free flow and anti-caking characteristics of powders

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Hydrophilic Fumed Silica Felcosil

Physical Properties

Felcosil EC Series hydrophilic fumed silica products are high-purity white powders engineered for rheology modification and reinforcement. With specific surface areas ranging from 150 to 300 m²/g, they deliver excellent thickening efficiency, thixotropic control, anti-settling and anti-sagging performance, as well as reinforcement in elastomer systems. They are suitable for silicone rubber, adhesives, sealants, coatings, printing inks,cable compounds,and unsaturated polyester resin applications.

Specifications

Type	Felcosil- EC 150	Felcosil-EC 200	Felcosil-EC 300
Properties	Target Values (Spec Limits)
Appearance	White Powder
Heating Loss at 105 °C 2h wt.% Max	1.5	1.5	1.5
Igniting Loss wt.% (2h at 1000 °C, based on materials dried for 2h at 105 °C) Max	2.0	2.5	2.5
45μm Mesh residue on sieve wt% Max	0.04	0.05	0.05
pH Value in 4% dispersion	3.6-4.5
SiO2 (based on ignited material) % Min	99.8
BET specific surface area m²/g	135-165	175-225	275-325
Tamped density (based on material dried for 2h at 105 °C g/L	40-60	25-60	40-60
Carbon conten (based on material dried for 2h at 105 °C wt.% Max	0.15	0.2	0.2