Characteristics

HIFULL HB-615 is hydrophobic fumed silica which is produced by  hydrophilic fumed silica with specific surface area of 180m2/g  after chemical post-treatment with HMDS (Hexamethyldisilazane).

 

Applications

Elastomers, HTV&RTV silicone rubber, SLR

Coatings & Printing ink

Adhesives and Sealants

Negative Toners

Powder Coatings

Properties

Reinforcing filler for elastomer

High hydrophobicity and stable thixotropy

Anti-settling,anti-sagging, anti-thixotrophy in coating and ink

Improving the homogeneity and stability of pigment

Free flow aid and anti-caking aid for powders

 

Physical & Chemical Data

PropertiesUnitTypical ValueTesting Method
Specific surface area(BET)m2/g140±20GB/T 20020
pH value in 4% dispersion (H2O:Ethanol=1:1)-
5.0~8.0GB/T 20020
Loss on drying(2 hours at 105℃)%≤0.7GB/T 20020
Loss on ignition(2 hours at 1000℃ based on material dried for 2 hours at 105℃)%≤4.0GB/T 20020
Silica Content(Based on ignited material)%≥99.8GB/T 20020
Tamped Density(Based on material dried at 105℃ for 2 hours)g/dm³40~60GB/T 20020
Carbon Content (Based on material dried at 105℃ for 2 hours)%1.0~1.7GB/T 20020