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HJSIL® R622 Hydrophobic Fumed Silica
HJSIL® R622 Hydrophobic Fumed Silica
HJSIL® R622 Hydrophobic Fumed Silica
HJSIL® R622 is a kind of hydrophobic fumed silica, treated with HMDS (hexamethyldisilazane). It’s high purity white colloidal powder.
1.Reinforcement of HTV silicone rubber, anti-caking
2.High hydrophobicity and stable thixotropy, using in coating and ink can prevent from anti-caking, anti-sagging and anti-thixoteopy
3.Good performance of hydrophobic feature and rheology in adhesives and sealants
CHARACTERISTIC
TECHNICAL DATA
APPLICATIONS
PACKAGING
CHARACTERISTIC
HJSIL® R622 is a kind of hydrophobic fumed silica, treated with HMDS (hexamethyldisilazane). It’s high purity white colloidal powder.
Properties
Reinforcement of HTV silicone rubber, anti-caking
High hydrophobicity and stable thixotropy, using in coating and ink can prevent from anti-caking, anti-sagging and anti-thixoteopy
Good performance of hydrophobic feature and rheology in adhesives and sealants
Improvement of the free flow of powder coating and anti-caking

 
TECHNICAL DATA
Properties and test methods Unit Typical Value Standardization
Specific surface area (BET) m2/g 260±30 GB/T20020
pH value
(in 4% dispersion)
  5.5 ~ 7.8 GB/T20020
Loss on drying
(2 hours at 105 °C)
Wt% ≤ 0.5 GB/T20020
Loss on ignition
(2 hours at 1000 °C,
based on material dried for 2 hours at 105 °C)
 
Wt%
 
≤ 4.0
GB/T20020
Silica content
(based on ignited material)
Wt% ≥ 99.8 GB/T20020
Tamped density
(based on material dried for 2 hours at 105 °C)
g/L 40 ~ 60 GB/T20020
Carbon content
(based on material dried for 2 hours at 105 °C)
Wt% 2.8 ~ 4.0 GB/T20020
APPLICATIONS
● HTV and liquid silicone rubber
● Adhesives and sealants
● Paints, coatings, and printing inks
● Powder coating
PACKAGING
HJSIL® R622 is supplied in 10kg kraft paper bags. We recommend to store the product in closed containers under dry conditions and to protect the material from volatile substances.
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