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

Tokuyama REOLOSIL QS40 Hydrophilic Fumed Silica

Tokuyama REOLOSIL QS40 is a hydrophilic fumed silica imported from Japan, made by burning high-purity silicon tetrachloride in a hydrogen-oxygen flame. It has ultra-large specific surface area, high purity, strong reinforcement and excellent thixotropy, serving as a core functional additive for multiple systems.

Features Of Tokuyama REOLOSIL QS40 Hydrophilic Fumed Silica

  1. High-purity primary preparation - Made by hydrogen-oxygen flame process, no impurity residue, high SiO₂ purity and excellent batch stability

  2. Ultra-large specific surface area - Specific surface area up to 380±30m²/g, outstanding thickening, thixotropic and anti-settling effects, suitable for multiple systems

  3. Multifunctional integration - Integrates reinforcement, thickening, anti-settling, thixotropy and fluidization functions to solve various processing needs in one stop

  4. High transparency adaptability - Particle size only about 7nm, does not affect product transparency after dispersion, suitable for high-end transparent coatings and resins

  5. Wide system compatibility - Excellent hydrophilicity, good compatibility with water-based and polar solvent systems, easy to add and disperse

Typical Applications Of Tokuyama REOLOSIL QS40 Hydrophilic Fumed Silica

  1. Coatings and inks - Used as anti-settling agent and thixotropic agent to prevent pigment settling and improve coating uniformity and workability

  2. Adhesives and sealants - Thicken and reinforce, optimize thixotropy, prevent sagging, and enhance bonding strength and durability

  3. Silicone rubber and organic elastomers - Efficient reinforcement to improve product tensile, tear strength and mechanical stability

  4. Unsaturated polyester resin (UPR) - Enhance resin strength and transparency, extend system pot life

  5. Flowable powders - Improve powder fluidity and anti-caking, and enhance processing efficiency and storage stability

Specifications Of Tokuyama REOLOSIL QS40 Hydrophilic Fumed Silica

BrandTokuyama
Product SeriesREOLOSIL Hydrophilic Fumed Silica
Product TypeHydrophilic Fumed Silica
Preparation ProcessBurning high-purity silicon tetrachloride in hydrogen-oxygen flame
Primary Particle SizeApprox. 7 nm
BET Surface Area380±30 m²/g
Moisture Content≤1.0 wt%
Loss on Ignition≤2.0 wt%
pH Value (4% Dispersion)3.8–4.8


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