LUDOX® SM contains synthetic colloidal silica with a particle size of 7 nm. It is a highly temperature stable binder used in coatings and refractories.
LUDOX® SM is an aqueous dispersion containing 30% synthetic amorphous silica with a particle size of 7 nanometers. It features one of the smallest particle sizes of the LUDOX® product line and as such is an excellent binder with high surface area. In ceramic applications LUDOX® SM acts as an "inorganic glue" that binds to ceramic fibers and powders. LUDOX® SM binds well to metals and oxides used in refractory and ceramic applications and is ideal for applications that require a binder that is stable in very high temperatures. It can also be used to improve durability of coating formulations by increasing cohesive strength. LUDOX® SM binds well to metal and as such can be used as an adhesion promoter and reinforcing agent for caulks and sealants. The small particle size of the amorphous silica in LUDOX® SM make it useful as a densifier for concrete as well. The silica particles are able to easily penetrate the porous surface of concrete to interact with calcium hydroxide present in the cured cement to form calcium silica hydrate (CHS). This increases the density and improves hardness of the concrete.
Density (g/cm³, lb/gal): 1.21, 10.1
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
Small particle size
Narrow particle size distribution
High thermal stability
Excellent binders
Adhesion promoters
Anti-slip properties
Anti-blocking agents
Soil retardants
Reinforcing agents for improved resistance
Improved polishing performance
Sagging of adhesives and sealants caused by a lack of cohesion.
Poor durability of coatings in high temperature applications.
Defects in refractory materials caused by poor performance of organic binders.
Paper and film coatings
Industrial water-based coatings
Latex coatings
Electrical steel inorganic coatings
Brick coatings
Catalyst formulations
Molecular sieves
Vacuum formed refractories
Precision investment casting
Adhesives
Caulks and sealants
Elastomeric foams
Concrete Densifier
LUDOX® Colloidal Silica is used in a wide range of processes to improve the and resiliency of building materials. Formulating LUDOX™ into concrete, coatings, adhesives, and sealants increases productivity and reduces cost while boosting the strength and consistency of the end product.
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