LUDOX® HSA is a slightly acidic, deionized colloidal silica with a particle size of 12 nm. It's used as a binder in coatings to improve durability.
LUDOX® HSA is an acidic, 30% solids, aqueous dispersion of surface modified silica. LUDOX® HSA is unique in that it contains no stabilizing counter ion. LUDOX® HSA is useful in applications sodium or alkaline components used to stabilize colloidal silica aren't desired. LUDOX® HSA particles have a very high surface area and is excellent at binding metals, siliceous material, oxides, and polymers with reactive functional groups.
Density (g/cm³, lb/gal): 1.2, 10
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: None
Particle Charge: Negative
Biocide ppm: 25
Primary Chemistry: Colloidal Silica
Anionic particles
Small particle size
Narrow particle size distribution
Deionized
High surface area
Excellent stability
Broad pH stability
Low sodium content
Compatible with Polar Solvents
Alkaline colloidal silica isn't compatible with formulation.
Coatings with poor durability.
Surface is too slippery.
Failure of binding resins caused by exposure to high heat.
LUDOX® HSA can be added to coating formulations and will not interfere with polar solvents in the formulation. The LUDOX® HSA particles remain in the cured coating and improve film durability and anti-blocking properties. Additionally, the particle size of LUDOX® HSA allows for it to be added to coatings without altering the clarity of the dried film.
In adhesive formulations LUDOX® HSA can be used to improve adhesion to metal and glass surfaces.
LUDOX® HSA is very efficient at binding and is often used to bind metals for catalyst applications.
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