Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Tokuyama REOLOSIL KS-20SC Hydrophobic Fumed Silica

Tokuyama REOLOSIL KS-20SC is a hydrophobic fumed silica imported from Japan, surface-modified with special organosilane. It has strong thixotropy, anti-sedimentation, reinforcement and flow aid, with excellent dispersibility and compatibility, suitable for high-end applications in various fields.

Features Of Tokuyama REOLOSIL KS-20SC Hydrophobic Fumed Silica

  1. Strong hydrophobicity & hydrolysis resistance – specially organo-modified, moisture-proof and hydrolysis-resistant, greatly improve long-term storage stability

  2. Efficient thixotropy & anti-sedimentation – rely on nano-level agglomeration structure, thicken quickly and endow stable thixotropy, prevent sagging and pigment settling

  3. Strong reinforcement & toughening – as core reinforcing filler for rubber and elastomers, significantly enhance mechanical strength, tear resistance and aging resistance

  4. Powder flow aid & anti-caking – effectively improve powder fluidity, prevent caking, optimize powder processing and storage convenience

  5. High purity & easy processing – ultra-fine particles (5-50nm), fluffy without agglomeration, easy to add and compatible with multiple processes

Typical Applications Of Tokuyama REOLOSIL KS-20SC Hydrophobic Fumed Silica

  1. Paints & coatings – thickening and thixotropy, anti-pigment sedimentation, improve film flatness, weatherability and corrosion resistance

  2. Printing inks – stabilize system rheology, improve pigment dispersion, enhance printing clarity and color stability

  3. Sealants & adhesives – thickening and reinforcement, improve bonding strength, waterproof performance and long-term reliability

  4. LED & electronic materials – high purity for encapsulation, ensure insulation performance and long-term stability of electronic devices

  5. Silicone rubber/elastomers – efficient reinforcement, improve product toughness and wear resistance, suitable for high-end rubber products

Specifications Of Tokuyama REOLOSIL KS-20SC Hydrophobic Fumed Silica

BrandTokuyama (REOLOSIL Series)
Product TypeHydrophobic Fumed Silica
AppearanceFluffy white powder
SiO₂ Content≥99.8%
BET Surface Area180–220 m²/g
Carbon Content1.5–2.5%
pH Value (4% suspension)4.8–6.8
Moisture Content<0.5%
Bulk DensityApprox. 50 g/L


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