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LUDOX® TMA
LUDOX® TMA is an anionic colloidal silica designed to be stable over a broad pH range. It is used to prepare ethyl silicate–silica hybrid binders that create slurries used in casting.
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Documents
- Manufacturer: Grace
- Product Line: LUDOX® Monodispersed Colloidal Silica
- Product: LUDOX® Colloidal Silica
- Industries: Adhesives | Building & Construction | Care Chemicals | Coatings | Inks | Maintenance, Repair, Overhaul | Metal Processing & Fabrication | Transportation
- Authorized Countries: Canada | United States
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Product Line
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Authorized Countries
Canada
United States
Overview
LUDOX® TMA is a slightly acidic, aqueous dispersion of negatively charged silica particles with an average particle size of 22 nanometers. It is a unique type of colloidal silica in that it is not stabilized by a counterion like other LUDOX® grades. LUDOX® TMA is stable in a pH range of 4–10, a much broader range than most colloidal silica. This makes it a versatile chemical tool for formulators working with both acidic and alkaline formulation conditions.
LUDOX® TMA is often used to prepare hybrid-type binders composed of ethyl silicate and colloidal silica for ceramic slurries used in precision investment casting applications. It is stable in extreme temperatures and can also be used as a binder for ceramic materials used in refractory applications.
LUDOX® TMA may also be used in coating formulations, where it serves as a useful material to provide surface modification and increase the coefficient of friction.
Specifications
CAS number: 7631-86-9
Density (g/cm³, lb/gal): 1.24, 10.3
Boiling point (760 mm Hg), °C (°F): 100 (212)
Melting point, °C (°F): 0 (32)
Vapor pressure (25°C, mm Hg): 24
Vapor pressure (38°C mm Hg): 48
Stabilizing counterion: None
Particle charge: Negative
Biocide (ppm): 25
Primary Chemistry: Colloidal Silica
Features & Benefits
- Anionic particles
- Intermediate particle size
- Silica is stabilized without the use of counterions
- Narrow particle size distribution
- Broad stability from pH 4 to 10
- Contains low sodium levels
- Great surface modification performance and formulation stability
Problems Solved
Instability of colloidal silica dispersions in acidic or alkaline formulations Insufficient binding within slurries used in investment casting processes Failure of ceramic and refractory binders when exposed to high temperatures Low coefficient of friction on surfaces
Applications
Investment casting Refractories Coatings
Related Applications
Adhesives
Building & Construction
Care Chemicals
Coatings
- Aerospace Coatings
- Appliances & Machinery Coatings
- Architectural Coatings
- Automotive OEM Coatings
- Automotive Refinish
- Ceramic Coatings
- Coil Coatings
- Floor Coatings
- Industrial Coatings
- Marine Coatings
- Metal Coatings
- Paper Coatings
- Textile & Leather Coatings
- Wax and Polishes
Related CAS Numbers
Building & Construction
Related Chemistries
Adhesives
Building & Construction
Coatings
Inks
Related End Markets
Maintenance, Repair, Overhaul
Metal Processing & Fabrication
Transportation
Related Functions
Adhesives
Building & Construction
Care Chemicals
Coatings
Inks
Metal Processing & Fabrication
Related Substrates
Metal Processing & Fabrication
Related Technologies
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