Hydrophobic Fumed Silica R620
Description:HJSIL R620 is a hydrophobic fumed silica after-treated with Hexamethyldisilazane (HMDS). Besides fumed silica, in this application the Precipitated Silica and Silicates, Hydrophilic fumed silica are also possible options.
Applications:
Coatings and Paints
HTV Silicone Rubber
Liquid Silicone Rubber (LSR)
Rubbers and Plastics
Powder Coatings
Product features:HydrophobicReinforcing agent for silicone rubber to prevent structuringExcellent anti-sag performanceStable thixotropy, anti-settling, anti-sag in coatings, inksImproved high free flow and anti-caking of powder coatings
Physical and chemical data:
Properties and test methods
Unit
Typical Value
Standardization
Specific surface area (BET)
m2/g
180 ± 25
GB/T 20020
pH value (in 4% dispersion)
5.5 ~ 7.5
GB/T 20020
Loss on drying (2 hours at 105 °C)
Wt%
≤ 1.0
GB/T 20020
Loss on ignition (2 hours at 1000 °C,based on material dried for 2 hours at 105 &…