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LUDOX® CL
LUDOX® CL is an acidic 30% aqueous dispersion of surface-treated colloidal silica. This LUDOX® grade carries a positive surface charge and is used as a surface modifier for paper.
Fulfilled By ChemPoint
- Manufacturer: Grace
- Product Line: LUDOX® Monodispersed Colloidal Silica
- Product: LUDOX® Colloidal Silica
- Industries: Adhesives | Coatings | Inks
- Authorized Countries: Canada | United States
Fulfilled By ChemPoint
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Overview
LUDOX® CL contains 30% silica with an average particle size of 12 nm. Unlike other LUDOX® grades, the surface of the silica in LUDOX® CL is modified with aluminum to induce a positive sol charge. It is acidic in pH and typically used as a binder in coating applications that contain cationic types of polymers or surfactants. Here, the LUDOX® integrates itself into the polymer network and provides increased strength and physical integrity to the film formed during curing.
The cationic nature of LUDOX® CL also 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, where LUDOX® increases the coefficient of friction, reducing slippage, telescoping, and paper feed errors of paper- and paperboard-based products.
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 counterion: Chloride
Particle charge: Positive
Biocide (ppm): 25
Total Solids (% m/m): 30
Primary Chemistry: Colloidal Silica
Features & Benefits
- Positively charged silica particles
- Small silica particle size
- Stable in formulations in an acidic pH range of 3.7–5
- Provides excellent binding capabilities
- Outstanding formulation stability
- High-temperature stability
- Increases coefficient of friction on surfaces
- No VOCs
- Easily cleans from paper machines
Problems Solved
Packaging slips when stacked Telescoping of rolled paper Low coefficient of friction on paper surfaces that leads to slipping during storage and transport Use of anti-slip coatings that contain VOCs Instability of colloidal silica in low-pH coating formulations
Applications
Paper and paperboard manufacturing Coatings
Related Applications
Related Chemistries
Adhesives
Related Functions
LUDOX® Monodispersed Colloidal Silica Articles
LUDOX® - Improved Resiliency for Building & Construction
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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