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LUDOX® AS-30
LUDOX® AS-30 is an ammonium-stabilized alkaline dispersion of amorphous silica. This colloidal silica is typically used as a binder in catalyst and high-temperature ceramic applications and as a cobinder and surface modifier in paints and coatings.
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Documents
- Manufacturer: Grace
- Product Line: LUDOX® Monodispersed Colloidal Silica
- Product: LUDOX® Colloidal Silica
- Industries: Adhesives | Agriculture | Building & Construction | Coatings | Energy | Inks
- Authorized Countries: Canada | United States
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Authorized Countries
Canada
United States
Overview
LUDOX® AS-30 is a 30% active, alkaline colloidal silica with a particle size of 12 nm. The silica particles are stabilized with ammonium hydroxide, making it ideal for several applications where the presence of sodium ions from other LUDOX® grades cannot be tolerated.
LUDOX® AS-30 is an excellent binder and silica source for inorganic catalysts such as zeolites, where it minimizes the introduction of sodium content and increases chemical and thermal stability. It is also commonly used to improve the strength and durability of ceramics, refractory, and other inorganic materials, where resistance to thermal and mechanical shock is important.
LUDOX® AS-30 may increase durability in several latex-based adhesives and coatings. In adhesives, LUDOX® AS-30 will increase cohesive and shear strength. In coatings, it will improve resistance to abrasion, dirt pickup, and blocking.
Specifications
CAS number: 7631-86-9
Silica content (%): 29–31
Specific surface area (m²/g): 198–258
pH: 9.1–9.7
Specific gravity (at 25°C): 1.2
Viscosity (at 25°C, cPs): 11
Particle charge: Negative
Stabilizing counter ion: Ammonium
Primary Chemistry: Colloidal silica
Features & Benefits
- Negative sol; anionic
- Small particle size
- Narrow particle size distribution
- Ammonium counter ion
- Low sodium content
- Excellent binding strength
- Outstanding formulation stability
- Extreme temperature resistance
Problems Solved
Poor temperature resistance of binders used in ceramics and refractories Instability of coating, adhesive, and paint systems due to the presence of sodium ion Incompatibility of inorganic catalysts with binders and additives containing sodium Low abrasion, blocking, and dirt pickup resistance of paints and coatings Inadequate cohesive and shear strength of adhesives
Applications
Ceramics Refractories Paints Coatings Adhesives Inorganic catalysts
Related Applications
Adhesives
Building & Construction
- Caulks and Sealants
- Cements
- Ceramic Binders
- Concrete Coatings
- Concrete Sealers
- Firebrick
- Gypsum
- High Strength Concrete
- Latex Emulsions
- Mineral Slurries
- Mortar
- Plasters
- Refractory Mortar
- Stucco Coatings
- Thin Set Mortar
- Aerospace Coatings
- Appliances & Machinery Coatings
- Automotive OEM Coatings
- Brick Coatings
- Ceramic Coatings
- Coil Coatings
- Industrial Coatings
- Metal Coatings
- Paper Coatings
- Stone and Tile Coatings
Related CAS Numbers
Building & Construction
Related Chemistries
Adhesives
Related Functions
Adhesives
Agriculture
Building & Construction
Coatings
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