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HJSIL® R274 Hydrophobic Fumed Silica
HJSIL® R274 Hydrophobic Fumed Silica
HJSIL® R274 Hydrophobic Fumed Silica
HJSIL® R274 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichloro-silane). It’s high purity white colloidal powder.
1.Reinforcement in elastomer, can effective prevent from structurization and prolong the shelf-life of RTV silicone sealants
2.High hydrophobicity and stable thixotropy, using in coating and ink can prevent from anti-caking, anti-sagging and anti-thixotrophy
CHARACTERISTIC
TECHNICAL DATA
APPLICATIONS
PACKAGING
CHARACTERISTIC
HJSIL® R274 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichloro-silane). It’s high purity white colloidal powder.
Properties
Reinforcement in elastomer, can effective prevent from structurization and prolong the shelf-life of RTV silicone sealants
High hydrophobicity and stable thixotropy, using in coating and ink can prevent from anti-caking, anti-sagging and anti-thixotrophy
anti-sagging and anti-thixotrophy
High hydrophobicity and rheology in adhesives and sealants
Improve the homoeneity and stability of pigment
Improve the free flow of power coating and anti-caking
TECHNICAL DATA
Properties and test methods Unit Typical Value Standardization
Specific surface area (BET) m2/g 170±20 GB/T20020
pH value
(in 4% dispersion)
  3.8 ~ 5.0 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%
 
≤ 2.0
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% 0.7 ~ 1.3 GB/T20020
APPLICATIONS
● Elastomer: HTV & RTV silicone rubber, LSR
● Coatings and inks
● Adhesive and sealants
● Negative toners
● Powder coatings
PACKAGING
HJSIL® R274 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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