LUDOX® CL is an acidic, 30% aqueous dispersion of surface treated silica. It carries a positive surface charge and is used as a surface modifier for paper.
Product Overview
LUDOX® CL contains 30% silica with a particle size of 12 nm. The surface of the silica in LUDOX® CL is modified with aluminum in order to induce a positive charge. It is unique in that it is one of the few grades of colloidal silica that has an acidic pH and carries a positive sol charge.
Product Specifications
Density (g/cm³, lb/gal): 1.23, 10.3
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: Chloride
Particle Charge: Positive
Biocide ppm: 25
Total Solids % m/m: 30
Primary Chemistry: Colloidal Silica
Features & Benefits
Positively Charged Particles
Small Particle Size
Excellent Binder
Stable in Acidic pH (3-5)
Excellent Binder
Outstanding Formulation Stability
High Temperature Stability
Provides Anti-slip Surface
Easy to Clean Up
Problems Solved
Packaging that slips when stacked.
Telescoping of rolled paper.
Low coefficient of friction on paper surfaces that leads to slipping during storage and transport.
The cationic nature of LUDOX® CL makes it well suited for modifying the surface of paper and other fibrous materials. The friction provided by LUDOX® CL is incredibly useful in packaging applications for anti-slip purposes. LUDOX® CL is also useful as a binder in applications where an acidic pH is necessary in order to retain formulation stability.