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HJSIL® R274 Hydrophilic Fumed Silica
HJSIL® R274 Hydrophilic Fumed Silica
HJSIL® R272 Hydrophobic Fumed Silica
HJSIL® R272 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichloro-silane). It’s high purity white colloidal powder.
1.Used as thickening, thixotropic, reinforcement in RTV silicone rubber
2.Rheology control of adhesive
3.Used as anti-settling, thickening, anti-sagging agent in coatings, inks
4.Improvement of free flow and anti-caking characteristics of powders
CHARACTERISTIC
TECHNICAL DATA
APPLICATIONS
PACKAGING
CHARACTERISTIC
HJSIL® R272 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichloro-silane). It’s high purity white colloidal powder.
Properties
Used as thickening, thixotropic, reinforcement in RTV silicone rubber
Rheology control of adhesive
Used as anti-settling, thickening, anti-sagging agent in coatings, inks
Improvement of free flow and anti-caking characteristics of powders
TECHNICAL DATA
Properties and test methods Unit Typical value Standardization
Specific surface area (BET) m2/g 110 ± 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% 0.6 ~ 1.2 GB/T20020
APPLICATIONS
● RTV silicone rubber and silicone sealants
● Adhesives and sealants
● Paints and coatings
● Printing inks and toner
● Cable compounds and gels
PACKAGING
HJSIL® R272 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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