Felcosil EC-300 Hydrophilic Fumed Silica for Unsaturated Polyester Resins and Coatings

Felcosil EC-300 Hydrophilic Fumed Silica for Unsaturated Polyester Resins and Coatings

It provides excellent rheology control, thickening efficiency, anti-settling performance, and reinforcement in a wide range of industrial formulations. Its high surface area and transparency characteristics make it particularly suitable for coatings, printing inks, silicone rubber, adhesives, sealants, and unsaturated polyester resin systems.

Item NO.:
Felcosil-EC300
EINECS No:
238-878-4
CAS No.:
10279-57-9
Chemical Formula:
SiO2

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Felcosil EC-300 Hydrophilic Fumed Silica for Unsaturated Polyester Resins and Coatings

Physical Properties

Felcosil EC-300 is a high-purity hydrophilic fumed silica with a BET surface area of approximately 300 m²/g.

Properties

Excellent rheology and thixotropy control
High thickening efficiency and suspension stability
Effective anti-settling and anti-sagging performance
Reinforcement for elastomers and silicone rubber
Improved powder flowability and anti-caking properties
Excellent transparency in unsaturated polyester resin systems

Specifications

Properties	Target Values (Spec Limits)
Appearance	White Powder
BET specific surface area m²/g	275-325
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
45μm Mesh residue on sieve wt.% Max	0.05
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	40-60
Carbon contend(based on material dried for 2h at 105 °C wt.% Max	0.2

Hydrophilic fumed silica Application

1.HTV and RTV silicone rubber

Used as a reinforcing filler in HTV and RTV silicone rubber systems to improve mechanical strength and durability.

2.Adhesives and sealants

Provides rheology control, viscosity adjustment, and improved storage stability.

3.Paints, coatings and pigments

Improves suspension stability, anti-sagging performance, and application consistency.

4.Printing inks

Enhances thixotropy, pigment suspension, and print quality.

5.Cable compounds

Contributes to rheological stability and electrical insulation performance.

6.Unsaturated polyester resins, laminated resins and Gel coat

Offers excellent transparency while providing effective thickening and reinforcement, making it suitable for clear and translucent composite systems.

Package and storage:

1. Package:10kg/PE bag

2. Storage: Kept in a low temperature, dry and ventilated place, avoid direct sunlight.

3. Shelf life: One year in ventilating, cool and dry area.

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Felcosil EC-300 Hydrophilic Fumed Silica for Unsaturated Polyester Resins and Coatings

Felcosil EC-300 Hydrophilic Fumed Silica for Unsaturated Polyester Resins and Coatings

Physical Properties

Properties

Specifications

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