HJSIL Fumed Silica R620

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 &…