SNOWTEX® is Nissan Chemical's trade name for colloidal silica which is used in a wide range of applications such as paper, textiles, steel, investment casting, refractories, batteries, catalyst, various coating and semiconductor polishing.
SNOWTEX® product list
- Alkaline sol pH-adjusted by sodium hydroxide
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Particle size by BET method. *1: Sears method, *2: Laser diffraction method is used. The figures above are general properties, not guaranteed properties.
- Acidic sol (Sodium ion reduced from Na type, No acid added)
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Particle size by BET method. *1: Sears method is used. The figures above are general properties, not guaranteed properties.
- Alkaline sol pH-adjusted by ammonia
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Particle size by BET method. *1: Sears method is used. The figures above are general properties, not guaranteed properties.
- High stability alkaline sol in neutral pH range
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Particle size by BET method. *1: Sears method is used. The figures above are general properties, not guaranteed properties.
- Acidic sol (Cationic surface)
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Particle size by BET method. The figures above are general properties, not guaranteed properties.
- Silicate solution
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Particle size by BET method. The figures above are general properties, not guaranteed properties.
※ ST is an abbreviation for SNOWTEX. Ex.) Official name: SNOWTEX-30 / Abbreviated name: ST-30
Functionality and applications of SNOWTEX®
- Frictionizing
- Friction factor is increased by silica particles adhering to surface of substrates.
- Preferred grades
Large particles -
- Applications
- Paper bags, Carton box
- Adhesion and coating
- Strong adhesion is formed on surfaces of substrates.
- Preferred grades
Silicate solution
- Binding
- Binding properties of silica particles can be obtained by mixing with ceramic particles and calcination.
- Preferred grades
Small particles / Alkaline sol
- Heat resistance
- Good heat resistance and fire endurance are obtained.
- Preferred grades
Acidic sol -
- Applications
- Refractories, Inorganic fibers, Catalyst support
- Hydrophilic contribution
- Improved wetting characteristics are obtained by Si-OH group and absorbed water.
- Preferred grades
Small particles -
- Applications
- Coating on glass and films
- Polishing agent
- Anti-blocking
- Silica particles can make nano-sized concavity and convexity on the surface of films.
- Preferred grades
Large particles
- Hardness
- Silica particles strengthen mechanical properties of organic resins.
- Preferred grades
Small particles -
- Applications
- Coating on optical films
- Coating on various films
- High transparency
- Transparency of films or composites can be kept due to nano particle.
- Preferred grades
Small particles
- Impregnation filling
- Silica particles impregnate and fill porous materials to give smooth surface.
- Preferred grades
Non-spherical particles -
- Applications
- IJ paper
- Abrasion
- Spherical and hard particles can work for smooth polishing.
- Preferred grades
Combination of several particles -
- Applications
- Polishing agent
- Anti-corrosion
- A dense film formed by particles functions as barrier material.
- Preferred grades
Small particles -
- Applications
- Metal surface treatment
- Gelation and viscosity increase
- Formation of uniform gel and precipitated gel, uniform dispersion of powder and stabilization of suspension are attained.
- Preferred grades
Small particles / Non-spherical particles -
- Applications
- Grout, Gel battery etc.
Characteristic of SNOWTEX®
Appearance and TEM image
- Particle size：12nm
- Particle size：45nm
- Particle size：80nm
- Particle size：12nm
Chain
- Particle size：25nm
String-of-pearls
Surface state
Effects of pH change
- The higher the concentration or the smaller the particle size, the greater the effect pH change. If a formulation or coating system has a neutral pH, or the formulation requires a colloidal silica with greater stability, ST-C can be used.
How to use SNOWTEX®
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- When use SNOWTEX®, refer to a below procedure to avoid particles aggregation.
- 1. Pour SNOWTEX® into vessel firstly.
- 2. Add solvent, resin and additives to SNOWTEX® with stirring.
