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LUDOX® HS-40 is a freeze thaw stable colloidal silica with a particle size of 12 nanometers that is used as a binder for coatings and refractory materials.
CAS number: 7631-86-9
Density (g/cm³, lb/gal): 1.3, 10.8
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 Counter Ion: Sodium
Particle Charge: Negative
Biocide ppm: 240;
Primary Chemistry:
Colloidal Silica
LUDOX® HS-40 is an alkaline, aqueous dispersion of 12 nanometer silica.
It contains 38% solids and is freeze thaw stabilized with ethylene glycol.
Because of the freeze thaw stability, LUDOX® HS-40 FS is suited for cold weather climates and situations where temperature controlled storage is not available.
Accidental freezing of LUDOX® HS-40 during storage or use in cold weather climates.
Low cohesive strength of coatings and adhesives that lead to structural failure.
LUDOX® HS-40 FS is primarily used as a high stability binder for refractory fibers used in high temperature applications.
In water-based coatings and adhesives LUDOX® HS-40 FS works to improve durability and cohesion of the system by becoming an integral part of the polymer matrix and latex film. LUDOX HS® HS-40 FS can also be used as an adhesion promoter for inorganic surfaces like metal and glass.
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