LUDOX® TM-40 is an anionic colloidal silica with 22 nanometer particle size. It is commonly used to increase friction on paper and textiles.
Product Overview
LUDOX® TM-40 contains 40% anionic silica with a particle size of 22 nanometers dispersed in water and stabilized with sodium ions. The particle size and electrostatic nature of LUDOX® TM-40 make it an excellent surface modifier. It is most often used as an anti-slip agent or frictionizer on paper, textiles and other materials.
Product Specifications
Density (g/cm³, lb/gal): 1.3, 10.8
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: 500 ppm
Primary Chemistry: Colloidal Silica
Features & Benefits
Anionic particles
Intermediate particle size
Narrow particle size distribution
Low surface area
Good binding strength and excellent stability in most applications
Excellent surface modification performance
Problems Solved
Slipping of textiles during cutting and sewing that causes defects and production delays.
LUDOX® TM-40 can be used to reduce the sheen on textiles and to avoid seam slippage while cutting fabric or sewing.

The high purity and particle size of LUDOX® TM-40 make it an excellent abrasive for polishing slurries used in the manufacture of silicon wafers.