Hydrophilic Fumed Silica Felcosil EC200 In Silicone Rubber

Felcosil-EC 200 is hydrophilic fumed silica with a specific surface area of 200m 2 /g. It is a kind of high purity white silica powder.

Item NO.:
Felcosil-EC200
EINECS No:
238-878-4
CAS No.:
10279-57-9
Chemical Formula:
SiO2

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Hydrophilic Fumed Silica Felcosil-EC 200 In Silicone Rubber

Physical Properties

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

Properties

Reinforcing filler in elastomers
Rheology and thixotropy control of liquid system, binder, polymers.etc.
Used as anti-setting, thickening, anti-sagging agent
Improvement of free flow and anti-caking characteristics of powders
High tansparency

Specifications

Properties	Target Values (Spec Limits)
Appearance	White Powder
BET specific surface area m2/g	175-225
Heating Loss at 105 °C 2h wt.% Max	1.5
Igniting Loss wt.% (2h at 1000 °C, based on materials dried for 2h at 105 °C) Max	2.5
pH Value in 4% dispersion	3.6-4.5
SiO2 (based on ignited material) % Min	99.8
Tamped density (based on material dried for 2h at 105 °C） g/L	25-60
Carbon conten (based on material dried for 2h at 105 °C wt.%） Max	0.2

Hydrophilic Fumed Silica Application

1. Silicone Rubber

Used as a reinforcing filler in high-temperature vulcanized (HTV) silicone rubber and two-component room-temperature vulcanized (RTV-2K) silicone rubber. It significantly improves tensile strength, tear strength, and abrasion resistance in products such as silicone keypads, seals, hoses, and wire/cable insulation.

2. Coatings, Inks & Adhesives

Acts as a rheology control agent in paints, printing inks, and adhesives. It provides thickening, thixotropy, anti-settling, and anti-sagging properties, while improving pigment dispersion and film adhesion.

3. Cable Materials

Used in cable insulation compounds and cable gels, particularly for fiber optic cables. It provides shear-thinning behavior, fast recovery, and good electrical insulation, protecting cables from moisture and mechanical stress.

4. Powder Additives

Functions as an anti-caking and free-flow agent in powder coatings, agricultural chemicals, pharmaceuticals, and cosmetic powders. It forms a protective layer around particles, absorbs moisture, and improves powder flowability.

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