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LUDOX® HS-30
LUDOX® HS-30 is a colloidal silica with an average particle size of 12 nm. It is a binder in casting and ceramics applications and a cobinder to increase abrasion resistance in latex paint and coatings.
LUDOX® HS-30 is a 30% solids, alkaline dispersion of anionic amorphous silica. This colloidal silica is characterized by high versatility as a good binder or surface modifier because it contains silica particles that are relatively intermediate in size.
LUDOX® HS-30 is formulated to be an optimal binder in investment casting and ceramics. It is commonly used to bind inorganic materials, including metals and oxides like aluminum, iron, and ceramic fibers used in ceramics and refractory manufacturing. Incorporation of LUDOX® HS-30 into ceramic slurries improves thermal and mechanical shock resistance.
LUDOX® HS-30 is also used in water-based coatings and adhesives to improve durability. The silica particles in LUDOX® HS-30 surround the polymer particles in water-based latex formulations and become an integral part of the latex film upon coalescence. The use of this colloidal silica in coatings and adhesives has also been shown to improve cohesive strength and, in some cases, adhesion of the formulation to a variety of substances, including metal and glass.
The electrostatic nature of LUDOX® HS-30 makes it an efficient flocculant for wastewater and papermaking applications, where positively charged contaminants must be removed. This functionality also proves useful in beverage fining applications, where food-grade versions of this colloidal silica are available for use.
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 counterion: Sodium Particle charge: Negative Biocide (ppm): 240
Anionic particles Small particle size Narrow particle size distribution Alkaline pH stability Provides excellent strength as a binder Stability in most applications
Problems Solved
High defect rate in ceramics manufacturing Insufficient thermal and mechanical resilience of ceramics and refractories Poor adhesion of coatings and adhesives to metal and glass Coatings that scratch and mar easily Low cohesive strength in latex-based adhesives Respiratory hazards due to the use of fumed silica Use of colloidal silica with inconsistent particle sizes
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Thank you for your inquiry and interest in ChemPoint. We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
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