DuPont Teflon® PTFE Grade K-20 Aqueous Dispersion

Subcategory: Fluoropolymer; Thermoplastic; PTFE

Key Words: Polytetrafluoroethylene; DuPont Fluoroproducts

Material Notes:
Teflon® PTFE K-20 is a negatively charged, hydrophobic colloid containing approximately 33% (by total weight) of 0.05 to 0.5 mm polytetrafluoroethylene (PTFE) resin particles suspended in water. A milky white liquid, Teflon® PTFE K-20 also contains approximately 3.5% (by weight of PTFE) of a nonionic wetting agent and stabilizer. Viscosity at room temperature is approximately 15 cPs. Nominal pH is 10.

Teflon® PTFE K-20 is used in applications where a minimum amount of surfactant is desired. The most common use for Teflon® PTFE K-20 is to reduce dust levels in host systems. When sheared, micro fibrils of PTFE are formed that interconnect the 0.2 mm particles. The presence of these micro fibrils reduces dust levels in many host systems.

When properly processed, the PTFE resin in Teflon® PTFE K-20 exhibits the superior properties typical of the fluoropolymer resins: retention of properties after service at 260°C (500°F), useful properties at –240°C (–400°F), chemical inertness to nearly all industrial chemicals and solvents, and low friction and antistick surfaces. Dielectric properties are outstanding and stable with frequency and temperature.

Applications

Typical products that have been successfully de-dusted include carbon powder, catalysts, fine chemicals, cement, and clays such as those in cat litter.