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Ludox HS-30 High pH is a 30% solids colloidal silica. It is formulated to a higher pH and is used as a binder in applications that require alkaline pH.
Ludox HS-30 High pH is an strongly alkaline, aqueous dispersion of silica with an average particle size of 12 nm. LUDOX®HS-30 high pH is notably useful as a binder in precision investment casting applications. It can also be used in coating formulations to improve durability and cohesion. LUDOX® HS-30 high pH also helps to improve soil resistance of anti-soil coatings and stool coatings.
Product Specifications
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
Features & Benefits
Anionic Particles Small Particle Size Narrow Particle Size Distribution Excellent Binding Strength Stability in Most Applications Optimized silica levels for investment casting and ceramic applications Increased shell strength in precision investment and casting due to higher pH and Na2O Alkaline pH Stability
Problems Solved
Instability of silica dispersions in formulations with a very high pH. Poor strength of molds formed for investment casting.
Applications
Investment Casting Vacuum Formed Fibrous Shapes Refractory Cements Stool and Mold Coatings Insulation Board Ceramics Binder Adhesives & Sealants Elastomeric Foams Paper and Film Coatings Inorganic Coatings Anti-Blocking Coating Anti-Soil Treatment
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